[NSW, SA, QLD] 30kWh VoltX Neovolt Battery & 5kW Inverter $5920 Installed (Metro Areas) @ VoltX

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[NSW, SA, QLD] 30kWh VoltX Neovolt Battery & 5kW Inverter $5920 Installed (Metro Areas) @ VoltX
Go to Deal
31mop on 15/07/2025 - 13:57 voltxenergy.com.au (2567 clicks)
Last edited 15/07/2025 - 14:23 by 1 other user

At the risk of being flamed, I'm trying to work out if I should go ahead with this deal or not.

I am aware of VoltX products and they seem reasonable quality. I can't really find too much bad about them online.

The price seems incredibly cheap (which makes me a little nervous). I spoke to a consultant (overseas call centre) and they discounted it on the spot a further $500 without asking so $5420 after all the rebates.

Anyone else had any experience with these guys before I pull the pin?

I already have a decent solar system and I export 30kw a day roughly, and this comes with an inverter which they (I assume) divert my solar into these batteries.

Too good to be true?

Referral Links

Referral: random (7)

Referee receives $200 discount on a purchase of a Neovolt battery system. Referrer receives a $200 cashback after the referee installs their product and must be a paying customer of the Neovolt battery system. See Referral Program

Electrical & Electronics Solar Battery Solar Inverter Solar Rebate

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Comments

                • chrisharry53 on 16/07/2025 - 19:29

                  @31mop: Thanks. Since 27/6, with an informative Powershop supplier app, power has cost from $7 to $18 a day, average $10 and usage 26kw. Solar generation average of 21kw a day. My missus is a cold frog lol

          • AssociatedVoltX Energy @ VoltX Energy on 17/07/2025 - 10:39
            +2

            @chrisharry53: @chrisharry53

            To get accurate pricing on either option, I'd recommend reaching out to our team directly so they can quote based on your specific site setup and power goals.
            Just a note that the 10kW 3-phase system uses a different stacking configuration, where the batteries are stacked vertically, and the inverter sits at the top of the tower. This differs from the single-phase system, which uses a side-by-side or depth layout.

            Your 17.3kW ducted system refers to the heating or cooling capacity, not the actual power draw, which is generally lower. Just as the helpful community members pointed out, these systems draw less power, and furthermore typically cycle on/off (or ramp up and down if it has VSD (variable speed drive) and rarely run at full draw for long periods.

            Also worth noting: your home's thermal efficiency plays a huge role in how hard your AC needs to work. Things like:
            - Proper insulation
            - Sealed gaps around doors/windows, even bottom of skirting boards
            - Double glazing, shaded windows, or open / closed blinds
            - Zoning of the AC
            - Temperature sensor locations

            I've gone down this rabbit hole for my own home :D, there are so many factors to help run the AC more efficiently.

            Cheers,
            David
            VoltX Energy

            • chrisharry53 on 17/07/2025 - 15:21

              @VoltX Energy: I looked more into it and 5kw inverter will be fine. Our peak usage on a horrid night recently was a touch under 5kw an hour but generally on that day it was below that. Cheers

        • BusMan247 on 16/07/2025 - 18:12

          Hi David, i called up and spoke to the virtual assistant. Keen to lock something in asap. Thanks for fielding the questions. Can I confirm, if the unit is faulty during the warranty period, who handles fhat ?

          • AssociatedVoltX Energy @ VoltX Energy on 17/07/2025 - 10:43

            @BusMan247: Hi @BusMan247

            Thank you very much for considering purchasing through us, we really appreciate it!

            If the unit is faulty during the warranty period (or if any workmanship issues need resolving), VoltX Energy handles everything directly. That includes:
            - Troubleshooting and technical support.
            - Organising a technician visit if needed.
            - Coordinating any replacements or warranty claims with the manufacturer.

            We take full responsibility for after-sales service, so you won't be passed around or left chasing different contacts.

            Cheers,
            David
            VoltX Energy Team

            • BusMan247 on 17/07/2025 - 12:56

              @VoltX Energy: Excellent. Thanks.

            • BusMan247 on 18/07/2025 - 21:16

              @VoltX Energy: Hi David, i caller up yesterday. Spoke woth Francis. Went throuvha 60 minute call. Got a quote sent to me, and was told he would call me today. Never called. Tried calling mysefl at 3pm, couldnt get through. Where does this leave me ?

    • bunk on 16/07/2025 - 16:26
      +1

      Thanks David for the info.

      I have just spoken to a sales rep. As I needed solar panels included with the quote.

      The sales rep offered:
      6.6 kW solar panels for $3k more
      9.6 kW solar panels for $4k more

      Is this the price on what everyone else is receiving?
      I was told, that the one inverter does everything.

      I’m not too sure, if it is worth going 9.6 kW solar panels since the inverter is at 5 kW, seems like a waste to go for more solar if it can’t be converted.

      David, please do an ozbargain discount :)

      • mirovich on 16/07/2025 - 16:56

        Thats quite expensive for panels supply and install.

      • AssociatedVoltX Energy @ VoltX Energy on 16/07/2025 - 17:13
        +1

        @bunk
        Thanks for reaching out and for speaking with the team!

        Those prices for the 6.6kW and 9.6kW solar add-ons are consistent with what we've been offering others. It's based on Tier 1 panels, CEC-listed gear, and full compliance.

        I'm really glad you asked about the 5kW inverter and wasted production from solar…. this touches on something I didn't cover in my original comment, and it's an important point:
        * Solar panels are often over-sized relative to the inverter (within CEC guidelines) to maximise production during low light or cloudy conditions.
        * So even with a 5kW inverter, having more than 5kW of panels helps stretch your generation curve and fill your battery more consistently.
        * Also - and this is important - your solar panels can charge the battery and power your home at the same time.
        So if your 9.6kW solar system is producing close to full output, it could (in theory) send around 4.6kW to charge the battery and 4.6kW to power your home.
        Actual output will vary depending on sunlight and system conditions, but the key point is: it's not either/or …. the system can do both charging batteries and supply power to the home, in parallel.

        So it’s not wasted, especially if you’re looking to make the most of self-consumption.

        :) regarding a discount, this is noted. I will try my best to get something across the line :)

        Cheers,
        David
        VoltX Energy Team

        • chillybags on 16/07/2025 - 23:39
          +2

          Hi David,
          I have an existing 6.6kw solar system (with a fronius primo inverter non hybrid) that’s north facing. Can I add on additional 6.6kw solar system facing east or west and have the 5kw inverters hooked up together or would I need to get the 10kw inverter that you offer? Would adding 9.6kw on top of existing 6.6kw be overkill? The existing cells are only 5 years old but any issues mixing and matching a new setup with older arrays?

          • AssociatedVoltX Energy @ VoltX Energy on 17/07/2025 - 12:08

            @chillybags: Hi @chillybags

            This is a great question. This scenario is very common that applies to a lot of homes looking to expand their solar and add a battery system.

            The extra solar, specially a larger array east and west is in most instances is not overkill, specially when you're instroducing a battery system.

            Here's one possible setup:
            - Your existing north-facing 6.6kW solar array continues powering your home and feeding into your existing Fronius Primo inverter
            - The new 9.6kW system (e.g. east/west) is set up as a separate system, connected to the battery inverter
            - This allows your battery to charge independently while still making full use of your existing panels

            Your 5-year-old panels are still relatively new in solar terms. We always aim to retain and integrate them where possible. Mixing old and new arrays isn't a problem as long as they're managed via separate MPPTs or inverters.

            That said, this isn;t a final recommendation. Every home is a bit different, and the ideal setup depends on your usage profile, roof layout, and goals.

            Our approach is to always aim for minimal disruptions and maximum returns.

            Cheers,
            David

        • El-Rhi on 17/07/2025 - 07:27

          Hi David, regarding the solar panels, is it possible to configure between 6.6kW and 9.6kW? Also, can you provide details on the types of panels that are available? The person I spoke with the other day couldn’t give any details on the panels.

          • AssociatedVoltX Energy @ VoltX Energy on 17/07/2025 - 12:34

            @El-Rhi: Hi @El-Rhi

            Best to reach out to us directly for a quote, the final system size will depend on your roof space and property layout.

            Our team will assess your site and recommend the most suitable system size.

            We use Tier 1 branded solar panels (such as Jinko, Trina, LONGi, etc.), but the specific brand included in your proposal will depend on supply availability and your location at the time of installation.

            So I won't be able to confirm the exact brand here, but if you have a specific request, feel free to let our team know during quoting and we'll do our best to accommodate it.

            Cheers,
            David

            • El-Rhi on 17/07/2025 - 14:41

              @VoltX Energy: Thanks David, appreciate the response. Do you use your own installers for the panels as well, or you subcontract this out?

              • AssociatedVoltX Energy @ VoltX Energy on 18/07/2025 - 11:28

                @El-Rhi: @El-Rhi

                We actually use a mix of internal and external installation teams.

                Our own in-house teams are on the field for many locations, and we also work with a network of vetted, CEC-accredited subcontractors where needed.

                Cheers,
                David

        • thestig on 18/07/2025 - 11:21

          Hi David, did you get anything across the line regarding a discount on the panels installed at the same time?

          • AssociatedVoltX Energy @ VoltX Energy on 18/07/2025 - 11:31

            @thestig: Hi @thestig

            Thanks for checking in. Unfortunately, not at this stage. We've had to keep the current promotion simple and focused, just to manage the volume and keep things consistent across the board.

            If anything changes or we’re able to bundle in a panel discount down the track, I'll definitely share it here.

            Cheers,
            David

    • furyou on 17/07/2025 - 00:21

      Can you explain:
      Backup functionality is available for $600, and this includes the components and re-wiring required for 2 circuits. Typically, this would be one power circuit (that includes a fridge) and a light circuit.

      My switchboard has 10 fuses (some linked), so is that 10 circuits? I would have thought the battery just feeds the house and not specific lines.

      I have a fronius symo 10kw 3 phase. I don't need your inverter right?

      • AssociatedVoltX Energy @ VoltX Energy on 17/07/2025 - 12:44

        Hi @furyou

        Great questions, and yes, your general understanding of how the battery works is spot on. During normal use, the battery powers your whole house (up to the inverter's capacity), and anything beyond that just pulls from the grid. So you're not limited to specific lines or circuits during regular operation.

        Now, backup functionality during a blackout is a bit more complex. For backup to work properly, we actually need to rewire specific circuits in your switchboard. That's why we include 2 circuits in the standard setup, typically one power circuit (which includes your fridge) and one light circuit.

        The reason we limit it to two is to avoid overloading the inverter during a blackout. For example, if you're not home and there's a power cut, but multiple high-draw appliances are still on, the inverter could trip. And if everything's backed up, that means even your fridge could go off. So we keep it lean to make sure the critical stuff stays running reliably.

        Also, we don't recommend running air conditioning through the backup, it's usually too heavy a load in outage scenarios.

        In terms of your Fronius Symo 10kW inverter, it's a solid unit, but it's not compatible with Neovolt batteries. We'd install the battery system separately, alongside your existing solar. It won't interfere with your Fronius. They'll just run in parallel.

        Cheers,
        David

        • furyou on 17/07/2025 - 15:47

          OK got it. Battery helps the whole house while stuff works. But limited to 5kW. If my AC is 3 phase then it takes from all phases, so the 5kW may not help with bumps in usage?

          In blackout only 2 circuits are fed. May be an issue as I said switchboard has 10 fuses. Lights are on at least 2 diff ones, not sure what the rest art.

          What's the extra cost of a larger and/or 3 phase inverter?

          • AssociatedVoltX Energy @ VoltX Energy on 18/07/2025 - 11:36

            @furyou: @furyou

            Yes, that’s correct — the battery supports the whole house during normal use, but is limited to the inverter’s output capacity (e.g. 5kW).

            And yes, during a blackout, the system only feeds 2 pre-selected circuits so if your lights are split across multiple fuses or you have essential appliances on separate ones, we can plan accordingly.
            That said, there are solutions for this and every home is a little different.

            If you're considering a larger or 3-phase inverter, the best thing to do is to reach out to our team here for a tailored quote:
            https://voltxenergy.com.au/pages/australian-federal-home-bat…

            They will assess your property and usage profile to guide the best setup.

            Cheers,
            David

    • keejoonc on 17/07/2025 - 10:36

      Hi David, @VoltX Energy

      I currently have an existing 6.6kw solar with Growatt MIN 5000 TL-X inverter.

      Can you please advise if this system would be suitable for use with the existing equipment? Is 50kwh pack way overkill given how small my solar system is?

      If you could advise any issues or compromises with the above setup, it would be much appreciated.

      Thanks.

      • AssociatedVoltX Energy @ VoltX Energy on 17/07/2025 - 12:48
        +2

        @keejoonc

        Your existing 6.6kW solar system with a Growatt MIN 5000TL-X inverter is perfectly fine to leave as-is. We'd simply install the Neovolt battery system as an independent setup. It will run in parallel with your current solar, meaning there's no need to remove or replace anything.

        About the 50kWh battery, no, it's not necessarily “overkill”, even with a smaller solar system. These are some of the reasons why:
        - The federal rebate only applies once per household, so by going larger upfront, you're maximising your one-time rebate savings
        - Even if you don't fill the battery from solar every day, it can be used to charge during off-peak grid times (e.g. 11am–2pm or overnight)
        - The extra storage helps during overcast periods, higher winter usage, or future changes like adding an EV or expanding your solar later

        No major compromises the setup is flexible, and many of our customers use the 50kWh system this way, especially if they're thinking long-term.

        Cheers,
        David

    • JayBholeNath on 17/07/2025 - 10:37

      @VoltX Energy
      Hi David,

      If Neovolt disappears after a few years, will Voltx Energy still provide warranty support. If yes, how?

      Also, I am a fronline worker, how much discount I can get and stack it on top?

      And I am in QLD(Energex), I would like to buy 50kw battery and 10kw inverter but the rep said it is not allowed by Energex, can you please confirm?

      • AssociatedVoltX Energy @ VoltX Energy on 17/07/2025 - 13:03
        +1

        Hi @JayBholeNath

        Totally fair concern, specially with warranty periods being as long as they are.

        1. What happens if Neovolt disappears after a few years?
          Very unlikely. The parent company, Bytewatt, has been supplying energy storage products to the Australian market for over a decade.
          That said, even in the unlikely event that Neovolt were to disappear, VoltX Energy would still handle all warranty and support. This isn't an exception, it's something we formally commit to as the retailer and installer, and it's also our legal obligation under the Australian Consumer Law.
          Of course, there are always edge cases, like if certain parts stop being manufactured in the future… but even then, there are always contingencies and workarounds. We've handled legacy support across many product lines over the years and we take that responsibility seriously. Our support and field operations team is set up to handle all concerns.

        2. Regarding stacked discounts:
          At this stage, our OzBargain promotional offer above is already fully discounted, and we're not able to stack additional discounts on top. These promos are fixed-price and have maxed out all available room for discounts.

        You are aboslutely correct on the issue with the limitation with the distributor in QLD. My apologies, and my apologies for not pointing that out earlier, as rules can vary between states.

        Hope this helps.

        Cheers,
        David

    • Rafski on 18/07/2025 - 14:02

      @VoltX Energy
      Hi David,

      What's the max charge rate? Does the 10KW option have a higher max charge rate?

      Can it be setup so that it just charges from solar most of the time, then between 11am and 2pm charges from the grid at it's max rate (my electricity plan has free usage between that time)?

      Thank you.

    • chrisharry53 on 18/07/2025 - 21:54

      Hi, so who got them please? I can’t see anything. “ P.S. To say thanks for all the insights and discussion, I’ll be sending a free VoltX 5,000mAh Power Bank(voltx.com.au) to 5 top contributors in this overall post.
      I will announce them here on Thursday, 24th July at 3PM (AEST).”

  • Sparky on 16/07/2025 - 16:19

    Any recommendations for a good battery payback period calculator?

    • impoze on 17/07/2025 - 18:56

      Pur your nmi data into solar quotes tool

  • One2Share on 16/07/2025 - 17:07
    +2

    I paid 10% deposit as well.
    Price is $6020 with $500 discount (mentioned this post) with blackout function ($600).
    Was advised deposit is refundable till installation date.
    Installation timeline: October

    Hope it goes well.

    • chrisharry53 on 16/07/2025 - 18:10

      The contract has conditions for a refund of the deposit. Change of mind isn’t included. See clause 8. If you find otherwise, let me know please.

      • One2Share on 16/07/2025 - 19:49

        Agreed with you as stated on the contract.

        In the sales rep's email, it contains "*The 10% deposit, if paid, is fully refundable within a 10-business-day cooling-off period pre-installation."

        Chatgpt:

        That sentence means:

        If you pay a 10% deposit, you’re not locked in immediately.

        You have a cooling-off period of 10 business days before the installation begins.

        During that cooling-off period, you can cancel for any reason.

        If you cancel within those 10 business days, you’ll get your full 10% deposit refunded.

        Key points:

        “Pre-installation” means this only applies before any installation work starts.

        “Business days” exclude weekends and public holidays.

        So it’s a way to protect you from being stuck if you change your mind soon after paying the deposit.

        • chrisharry53 on 16/07/2025 - 19:57
          +1

          Yep, standard 10 day cooling off period. Cheers

        • clartan2015 on 17/07/2025 - 11:27

          after the new promo posted for 50kwh, im thinking of cancelling my order yesterday but i could not find any cooling off period in the sales rep email, nor in the contract O_O

          • Sparky on 17/07/2025 - 11:36
            +1

            @clartan2015: @clartan2015 where did you see this new deal?

            • clartan2015 on 17/07/2025 - 12:03
              +1

              @Sparky: on this same page/topic. search this page for "Single-phase VoltX Neovolt 50kWh system"

  • lawcb on 16/07/2025 - 22:18

    How much to install with a 3 phase power?

    • chrisharry53 on 17/07/2025 - 08:03

      $550 extra for a smart meter for the batteries.

  • KRM123 on 17/07/2025 - 11:38

    @VoltX Energy
    Hi David,

    Ozbargain deal sounds good. I think 5kWh batteries paired with a 5kW inverter might be a bit undersized though, so you’d need around 10 hours of solar production at full output to fully charge them. That said, if you're on one of the low-cost plans offering 8c/kWh overnight, you could top up the batteries at night and then use that cheaper electricity during the day or export it back to the grid during peak times via Amber or similar services.

    In my case, I received a quote that included two 5kW inverters to run on my single-phase setup, aiming to make full use of my 13.3kW solar / 10kW inverter system. However, this added a fair bit to the cost. The quote included a dynamic control unit at $1,100 and an additional inverter at $1,800, so a total of $2,900 extra.

    Do you know if the dynamic control unit is always required when adding a second inverter? Is it primarily for export limiting on single-phase systems?

    Also, are there any plans to release a 10kW inverter for single phase homes? That would simplify installations like mine by avoiding the need for two units and would help reduce overall system costs.

    For backup, i assume with the two circuits, most are going to use 1 circuit to cover the fridge, and one for lights? Is there a way to add additional backup circuits to cover aircon as well?

    • AssociatedVoltX Energy @ VoltX Energy on 18/07/2025 - 12:06

      Hi @KRM123

      Thanks for sharing your feedback regarding limitations of a single 5kW inverter. It's something we talk through often with customers depending on their setup.

      A 5kW inverter will charge the battery at a maximum of 5kW, so yes, in theory it would take around 10 hours of continuous solar to fully charge a 50kWh system, but in practice, there are a few ways this still works well:
      - Time-of-day grid charging (if available in your area — e.g. off-peak or overnight rates around 8c/kWh)
      - Solar spillover during the day that would otherwise be exported
      - Or, less solar production on cloudy days, you benefit from having extra stored power.
      - Offsetting overnight usage or evening loads like cooking, heating, etc.
      - If you take backup functionality, and if you are in a blackout prone area, extra batteries will keep you powered for a longer period, potentially days vs hours (we had long

      It's true that for most households 20–30kWh is sufficient, especially when you're using it to shave peaks and cover evening use. In these cases, a 5kW inverter may be enough for daily charging and discharge patterns. The benefit of the extra batteries will then be as per the above points.

      Also, with the federal rebate and current pricing, going up to 50kWh is often only a small step up in cost.

      Now, if you have a larger home and/or consistently high usage, then yes running multiple inverters (like your 2x 5kW setup) or moving to a 3-phase solution makes a lot of sense. It gives you more power in and out at any time and helps balance loads better.

      Regarding your question on the dynamic control unit, this depends on your energy distributor's rules, we would have to comment on this with an inquiry with our team.

      As for a 10kW single-phase inverter, this is not in the roadmap.

      Youre spot on about the backup circuits we usually recommend:
      - 1 power circuit for the fridge and basic appliances
      - 1 light circuit for essential lighting

      Technically, more circuits can be added, but it depends on the inverter’s capacity and what loads you’re hoping to run during a blackout. We don’t usually recommend backing up things like air conditioning, since they draw a lot and risk tripping the system during outages.

      Cheers,
      David

  • fresh927 on 17/07/2025 - 11:51
    +3

    @VoltX Energy
    Hi David
    Tried to PM you but seems to be disabled?
    I called the call centre and they didnt seem to know about the ozbargain discount deal mentioned above.
    Like a couple of other people have mentioned being limited to 5kw inverter does limit how much of the 50kwh battery can be used and how quickly it could be charged - if the batteries need to be evenly distributed for a dual inverter set up would it be possible to get a price for say 40kw of battery with 2x 5kw inverters for single phase?
    Thanks

    • impoze on 17/07/2025 - 13:57
      +1

      also interested and thinking the same.

    • Yugidce112 on 17/07/2025 - 14:11
      +1

      I have an 8.8kw solar with an 8kw inverter and considering my options. I'm a noob in all this and so I'm hesitant to go for just 1x 5kw inverter and i would be interested to know about that same l config of 40kw battery with 2x 5kw inverter single phase with option of backup power supply. Thanks

  • JayBholeNath on 17/07/2025 - 16:24

    I have paid the 10% deposit for the Ozbargain special Offer 2; let's see how it goes.

  • El-Rhi on 17/07/2025 - 17:06

    For those putting orders through, make sure you take advantage of their referral program for an extra $200 off

    • chrisharry53 on 17/07/2025 - 18:39

      You can get $500 off over the phone. Doubt you would get $200 off as well for being referred.

      • El-Rhi on 17/07/2025 - 20:13

        Worked for me

  • lawcb on 17/07/2025 - 17:39

    Can we stack up the NSW battery rebate for VPP?

    • impoze on 17/07/2025 - 18:04

      hasn't that ended

      • lawcb on 17/07/2025 - 19:30

        Can be stackable with the federal rebate for battery connected to a VPP.
        https://www.energy.nsw.gov.au/households/rebates-grants-and-…

        • impoze on 17/07/2025 - 19:55

          Max 28kw batteries though?

          • impoze on 17/07/2025 - 21:54

            @impoze: The upfront incentive you receive depends on the usable capacity of the battery in kilowatt-hours (kWh). Larger batteries will receive a larger incentive.

            The incentive amounts you can receive are:

            between $400 and $550 for a 10 kWh battery
            between $1,000 and 1,500 for a 27 kWh battery.

            • postman on 18/07/2025 - 07:12

              @impoze: It has to be under 28kWh to be eligible, I believe.

              • impoze on 18/07/2025 - 07:51

                @postman: Yeah so these are 30kw systems and not eligible for VPP rebate then

  • timochy on 17/07/2025 - 17:39
    +1

    Currently have a 13kw system
    Is this considered an “upgrade” as per the t&c’s of the rebate.
    Im considering the 50kw system

    “You’re installing a new battery system for the first time at your property, or you’re adding at least 5 kWh of capacity to an existing system that hasn’t already received this rebate.
    The total battery capacity (new or upgraded) must fall between 5 kWh and 100 kWh. “

  • Blackpaw on 17/07/2025 - 18:14

    @VoltX Energy

    Gah kicking myself, Oct last year I paid $12,000 for an AC Coupled NeoVolt Inverter + 2 * 10kwH batteries when you can get more than double that now for half the price.

    Any deals for existing customers? Wouldn't mind a couple of extra batteries and maybe an extra/upgraded inverter.

    Thanks.

  • impoze on 17/07/2025 - 19:00

    How close can the batteries be side by side?

  • netgx on 17/07/2025 - 19:03
    +1

    Also interested in upgrading my current system.

    Is it possible to have 3x5kW inverters each paired with 20kW of batteries.

    For example
    phase A 5kW inverter + 20kW of batteries
    Phase B 5kW inverter + 20kW of batteries
    Phase C 5kW inverter + 20kW of batteries

    would this give a combined charge/discharge of approx 15kW and battery capacity of 60kW?

    Lastly are the new mounting kits able to stack the blue 10.1P vertically. I’d love to have 2 batteries and the inverter all in one vertical stack.

    If the above is possible, how do I go about getting a quote. I currently have installed a 5kW + 20kW of batteries but any time I reach out to sales, they say I can’t have multiple inverters. I’m on three phase Aus grid supply.

  • rhino86 on 17/07/2025 - 19:14
    -2

    Some long term considerations to think about. You screen obsessed junkies.

    1: Thunder and lightning storms.
    Batteries are subject to odd discharges or failure them when lightning strikes nearby, not close by close enough. What batteries where nearby in late December 2024 during a fierce thunder and lightning storm. Two lead acid in vehicles were fine one day, next day needing charging after the storm. One lithium-ion 56v battery next to the PV inverter. Flat. Never seen this before, has not occurred since. Also stuff was blown around in the wind gusts in June 2025.

    2: Battery emissions.
    All batteries emit gases into the air, hence the rules for placement. Something to consider when the wind carries around the house. Beware if you have any respiratory acute to ongoing issues. When its hot, yeah man 43 degrees in the shade, those batteries are going to be subject to excess external heat and humidity above 80% in SEQLD. Batteries will give off heat, EM fields, gases. Some extra shielding and ventilation may be required down the track post install.

    3: Ground movement:
    Ensure there sufficient cable length provided pre-install. A few degrees movement can leave cables stretched after 2-3 years once the concrete slab has shifted, or tiles or whatever you select for the foundation and base. Clay soils are subject to massive movement come the wet we are in, compared to the dry 2011-2019.
    Secure fittings may wiggle out, what was deemed good enough on day of install. May need repairs before failure.

    4: Inferior hardware:
    It is an external installation, yet time and time again electricians do not use tried and proven hardware, which ends up corroding. Staining the exterior of your house, eventually. Or completely failing and you end up paying again to have it repaired/ replaced.
    Or they use plastic plugs to secure hardware in wood or masonry which end up cracking, splitting and the bolt or screw wiggles out.
    Ensure the correct cable core and sheath specifications are used on the install day. Paperwork printed or digital does not always match what was actually installed. Are they UV stabilized, colour fast, coz cheap stuff will show quickly 1-2 years post install.

    5: Clouds, too many clouds.
    Since 2008 or really since the 1970's, daily weather subtlety has been changing.
    Solar PV systems have not been doing well, same with the bees due to more clouds, more light rain. This year 2025 Jan-June in SEQLD about 2 days out of a fortnight have been sunny or mostly sunny, the rest is Brittan weather, dreary and dull, rain yeah, rain nah, rain maybe.
    Rain can strip paint faster, more frequent and prolonged humidity is corrosion best friend.

    6: 5KW is not enough,
    Get your dual inverter quote, 2x 10KW. By the time summer comes around, how many A/C's do you have, 1,2,3,4,5 at the house….. Plus the ovens, air fryers, welder, distiller, etc.
    Know that PV systems are going to struggle to charge 30kw 50kw batteries systems if your at the house using most of electric power during the day. It might be better to consider 3x inverters instead of a 50kw system. And other types of generators. Solar PV is part of the story. No one has the remaining parts of the story sorted to disconnect the grid.

    7: Single phase might not be enough.
    Look you might not think you need three phase, but considering it might not cost much more to get it done sooner than later. Opens more benefits for what you are trying to achieve by storing power, generating power, using power. Speak to an qualified electrician who is in the know of the benefits over single phase electrical battery storage and generating systems.

    • Bigboomboom on 17/07/2025 - 20:36
      +1

      1. Mate, Lithium battery does not emit gas during normal operation. When it does, it is thermal runaway and it's best that you also runaway. The rules for placement is in the event of thermal runaway it will emit buck loads of toxic gas inside the battery chemical, not because of normal operations.

      2. You are not supposed to install battery into timber/weatherboard wall. You need fire rated sheet if your house is weatherboard/timber. It's the rules.

      3. Use electricity plan with free window or go Amber. I have Sigenergy setup - 10kW SP Inverter with 32kWh (4 x BAT 8.0) battery, I'm using OVO EV Plan and charge off free 3 window and charging my EV on EV rate (8 cents/kWh) because we don't work from home. Pulling average 50-60kWh a day from grid (with 10-12kWh solar on top because Winter shading sucks) and pay ~ $1.5/a day.

      4. Yes, agree. But for Ozbargainer and best ROI without complicated Amber trading, this is a bargain. Just be careful of quality, Neovolt is basically cheaper Alpha ESS which by itself is cheap stuff.

      5. Single phase IS enough. I have 10kW inverter, 7kW AC charger, 5 split systems, Heat Pump HWS, electric cooktop (non-induction) and I use 60-70kWh a day no problemo on a standard 63A single phase. 3P upgrade isn't cheap.

      • chrisharry53 on 18/07/2025 - 08:07

        You don’t recommend these batteries even at these prices? Does cheap mean junk or not a Mercedes SUV compared to a Renault, Mitsubishi,,etc?

        • Bigboomboom on 18/07/2025 - 08:51
          +1

          There are plenty of cheap alternatives that are better, at least on paper. For example Jaycar offer ESY Sunhome HM6-30 for similar $6k for 30kWh battery but with a 6kW inverter. The battery itself is modular, IP66 rating which is very rare in this price range. There's Huaracan Energy that offer similar up to 50kWh Deyess Power Pro and up to 8-10kW inverter. Deyess is an old player in off-grid.

          This is like comparing Chinese cars. Old MG vs Chery or GWM. Old MG is cheap but nasty whereas GWM or Chery is just a smidge more expensive but far more palatable. Personally you don't want 5kW inverter with 50kWh battery, you need to frequently charge the battery to 100% for cell balancing.

          Jaycar link
          https://www.jaycar.com.au/home-battery-solution

          Also I hope you understand that any work over $20k before rebates (which the 50kWh pack will be, as the rebates on that alone is $15k) will require insurance which is around $750. I normally don't see that in these kinda quote which will mean alarm bells ringing.

            • Sparky on 18/07/2025 - 13:02

              @chrisharry53: Are the Jaycar batteries VPP approved, and are they eligible for the subsidy?

              • chrisharry53 on 18/07/2025 - 13:06

                @Sparky: Click on link. I called and it does include hybrid inverter, DC coupling and installation. It is a new deal and the person I spoke to hasn’t had anyone sign up yet meaning quicker instal???

              • Bigboomboom on 18/07/2025 - 14:47

                @Sparky: Jaycar ESY works via Evergen to connect with Amber. No idea about the NSW VPP subsidy, some said ESY hasn't appeared on Mactrades yet to apply.

                What it does is it uses Evergen App if you wanna connect to Amber, instead of Ember Smartshift.
                https://www.amber.com.au/evergen

          • chrisharry53 on 18/07/2025 - 13:34

            @Bigboomboom: Thanks. I called Jaycar and it does include hybrid inverter, DC coupling and installation. It is a new deal and the person I spoke to hasn’t had anyone sign up yet meaning quicker instal?

  • Madcarn on 17/07/2025 - 19:51

    @VoltX Energy

    Much difference in pricing for two phase houses going for two inverters and 40kw of batteries including backup protection?

    • Madcarn on 18/07/2025 - 13:16

      I just rang for a quote, they stated that they are no longer offering two inverters to an install, this could not be changed even though I have two phases. So doesn't seem to be a phase/capacity thing, just a company restriction.

  • Lazy1 on 17/07/2025 - 22:33

    Just a note on upsizing battery
    Warranty (70% capacity @ 10yrs) requires MINIMUM throughputs (usage).
    Basically need to average 100% discharge each day (over 10 years).
    Less than this will void warranty.
    But thats only an issue, in 10 years, (if) your capacity is <70%

    Appendix 2 of warranty, min throughputs:
    50.5 kWh = 191.9 MWh over 10 years:
    (19.2 MWh/year/52.6 kWh/day)

    Just something worth considering, better value but risk warranty claim if not met.

    Also > 50deg voids warranty, easy to do if outside in heatwave.

    (Edit, but its such a good deal I'm getting one for a rental, because not all landlords are bad)

    • Bigboomboom on 18/07/2025 - 08:22
      +1

      I'm also looking at battery for my rental too, however I have decided to look at different alternatives in similar price ranges, mainly modular one because of foot print concern.
      1. ESY Sunhome, similar pricing for 30kWh through Jaycar. Modular, IP66, 6kW inverter and ESY has been making batteries (albeit for small devices) since 2004 and only recently (2021) expanded to home battery.
      2. Fox ESS, pretty popular in UK. Was/is no 1 in term of market share there.
      3. Deyess, requires Hybrid inverter separately. Pretty old player in off-grid and recently expanded to on-grid.

  • muddrex on 18/07/2025 - 09:14

    This is my current setup:

    8.25 kW solar system with 25 X 330 W Q Cells MONO solar panels
    SolarEdge 8kW HD Wave Inverter with 25 x P370 optimizers (SE8000H)
    Single Phase

    Given how SolarEdge has optimizers for each panel, is this compatible with the Neovolt battery?

    I'm expecting the battery to be outside and very close (less than 3m away) from the switchboard.

    • muddrex on 18/07/2025 - 16:22

      @VoltX Energy

  • keejoonc on 18/07/2025 - 10:14

    I had a quick call with their sales team and I've been told I can't get 2 x 5kwh inverter in QLD on single phase as Energex limits the total capacity of solar and battery inverter to 10kwh.

    Is this correct? I've done a quick search online and I'm seeing conflicting information which says 10kwh for solar inverter and 10kwh for battery inverter.

    • clem0ximus on 18/07/2025 - 10:20

      I'm in the same boat. Would be keen on 2x 5kwh inverter as 5kwh is just too small for peak usage times at night for family.

      • keejoonc on 18/07/2025 - 10:28

        I believe this is due to Energex's 10kwh export limitation.

        If you already have a 5kwh solar inverter, that means you can only install 5kwh battery inverter on single phase.

        The only way you can bypass this is by having export limiting device (dynamic control unit I think?) and that will allow you to install 10kwh inverter for solar and battery independently (i.e. total 20kwh).

    • splats on 18/07/2025 - 10:28

      judging by solar quotes it's 10kw solar panels inverter + 10kw battery inverter limit on single phase?

      https://www.solarquotes.com.au/grid-connection/qld/

      • keejoonc on 18/07/2025 - 10:29

        yes, with a caveat, based on my research.

        Hopefully someone who knows more than me can confirm.

  • mid32 on 18/07/2025 - 10:32

    @VoltX Energy

    Hi David

    Any deals for someone on a single phase that is looking for a 40kw system with 2 x 5kw inverters or 1 x 10Kw inverter? Correct me if I'm wrong but from reading the comments it seems that if you need load balancing with two 5kw inverters, than a 50kw battery is not really an option? It's ok if it is just 1 x 5kw inverter but for someone that only has a 5kw solar system, charging a 50kw seems it would take too long to charge (10 hours minimum) with just charging from solar and a 40kw battery would be more in a sweat spot. Wanting a 10kw inverter so i can run ducted system and other things and prefer the overhead as opposed to a 5kw inverter

  • keejoonc on 18/07/2025 - 10:36

    Can someone please DM me their details for referral?

    Thanks.

    • clem0ximus on 18/07/2025 - 10:47

      replied via DM

      • keejoonc on 18/07/2025 - 10:48

        Thanks. Got it.

  • keejoonc on 18/07/2025 - 10:51

    For anyone who's on the fence like me, I'm going to sign up for now as the deal ends today and think about it over the weekened. Can always cancel next week if I change my mind.

    They won't install two inverters in QLD. I have pushed them but they won't do it.

    I have stacked the referral discount so the price came down to $6500.

    • splats on 18/07/2025 - 11:11

      mind dm'ing me your details and i'll see what I can get. I have 2x5kw solar inverters already so interesting to see what they say.

      Or anyone wanna dm me their details for the referral bonus would be appreciated.

    • Bigboomboom on 18/07/2025 - 11:33

      Inverter limit is set by grid distributor and they can be different. It's possible your area does not allow over a certain kW inverter limit depending on your phase and the 2nd battery inverter exceeds that.

      • keejoonc on 18/07/2025 - 11:39
        +1

        This should help clear up the confusion regarding this limitation in QLD.

        https://www.energex.com.au/our-services/connections/resident…

        • splats on 18/07/2025 - 12:14

          got it thanks. gonna call them now.

          • keejoonc on 18/07/2025 - 12:18

            @splats: Just beware that they won't install 2 inverters regardless. It's either take 1 inverter or leave it type of situation unfortunately.

            I feel like they don't want to take on complicated jobs and want to push out volumes instead.

            • splats on 18/07/2025 - 14:58

              @keejoonc: salesperson didn't try too hard for me. Waiting for quote via email for 4batteries as 5 probably won't fit.
              They reckon I have to replace one of my 5kw inverters with a hybrid and said wiring with existing solar etc will cost $1600 extra.
              Near impossible to find out if my connection is Dynamic or Fixed as even the installers don't have that on their system and apparently energex has a couple of couple of week delay for new install applications. So effectively you have to pay for a whole new inverter replacement and then MAYBE find out after the application approval that you were on fixed and didn't need to replace the existing inverter with extra costs…pickle.

  • mid32 on 18/07/2025 - 11:25

    Can someone please DM me a referral?

  • Lazy1 on 18/07/2025 - 11:53

    Anyone more technical able to confirm.
    It appears the inverter (SPB5K) has no PV input
    (it wont change from solar).

    This the inverter on the quote, and info from datasheets attached. Which seems to contradict what David is suggesting in various comments, although context is relation to adding new PV system from them, likley including appropriate hardware.

    This isnt just blackout, this is anytime.
    You need the hybrid inverter or other 'things'

    So youre limited to AC, which is limited by the inverter, so you can only top up from the grid at 5kw, so thats the MAX you will charge and consume per hour, so using cheap or free energy in off peak will be limited to charge, not just discharge

    • keejoonc on 18/07/2025 - 12:10

      Are you sure about this? What good is a battery system if you can't charge from solar at all? Chat GPT says it can charge from solar.

      EDIT: I've looked into this and this is how AC coupled systems are designed to work. It does not have PV input as that is still handled by the solar inverter you have.

      Snippet from ChatGPT.

      The SPB model is designed to receive AC power from your solar inverter (like your Growatt) or grid — it does not have DC PV inputs.

      Those PV inputs are handled by your Growatt inverter, which converts PV DC to AC.

      The SPB then uses that AC (surplus) to charge the battery, and later discharges to supply your home or export.

      • Lazy1 on 18/07/2025 - 12:48

        I was told it was on the phone it would run independent or my existing system. Which is what made me question it.

        Your saying it doesn’t have PV input as it gets AC from your existing inverter, not DC from the panels. Which isnt independent (which inwas told). I hope youre right.

        It still limits the power generated by your inverter and loss along the way. My hybrid inverter/battery (seperate system) stores energy in DC so you can use 100% (theoretically) of your panels (which are 30% or 50% oversize) so going through an inverter will restrict. Generally curious.

        Also i was incorrect on the input, it's 10kVa so roughly 10kw

        • keejoonc on 18/07/2025 - 12:49

          Well lower efficiency is one of the downsides of AC coupled system so that's to be expected.

        • Bigboomboom on 18/07/2025 - 17:42

          It's not a hybrid inverter, it's AC Coupled. Your solar inverter supply AC current to the battery inverter. They do offer a hybrid inverter.

    • V2L on 18/07/2025 - 14:25

      I think David has been clear that blackout protection doesn't mean you can charge battery from solar, and a hybrid inverter is required which is additional to the offer package. blackout protection only gives you back up to use stored power from batteries if grid cuts out

      • keejoonc on 18/07/2025 - 15:20

        I think what you are referring to use charging the battery using solar during blackout, which is different to what Lazy1 talking about?

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