Solar Quote Help Please

Im so confused as to which quote to go with. Please give me your thoughts….

I like company #2 as they were the only company to come out to the house ( the others were quoted remotely )
but I feel the quote is quiet pricey
I also like the idea of the optimisers or micro inverters due to shading over 1 area of the house early in the morning

Company #1
18 x SunTech 330W monocrystalline half-cut panels (STP330S – 21/Wfh; 25 year
performance warranty; 12 year product warranty)
Fronius Primo 5.0-1 inverter (10 year warranty)
TOTAL INCL. GST $9,710
Less STCs (government rebate) $3,465
Sub-total $6,245
Deposit (non-refundable; 10%) $625
Balance payable (due on day of completion) $5,620

18 xLG NeON2 355W panels (25 year performance warranty; 25 year product warranty)
Fronius Primo 5.0-1 inverter (10 year warranty)
TOTAL INCL. GST $12,605
Less STCs (government rebate) $3,735
Sub-total $8,870
Deposit (non-refundable; 10%) $885
Balance payable (due on day of completion) $7,985

Company #2
6.5kW solar to grid system
20 Trina Honey Black 325W solar panels, each with a SolarEdge p370 Optimiser.
SolarEdge 6kW HD Wave Inverter
PRICE: – $11,600.00
Renewable energy certificates: – $3,200.00
Total price
(after STC’s have been deducted) – $8,400.00 (GST incl.)

7.8kW solar P.V. to grid system.
24 Trina Honey Black 325W solar panels, each with a SolarEdge p370 Optimiser.
one SolarEdge 6kW HD Wave Inverter.
PRICE: – $13,600.00
Renewable energy certificates: – $3,776.00
Total price
(after STC’s have been deducted) – $9,824.00 (GST incl.)

Company #3
6.60kW Solar Power System
• 20 x 330W Seraphim Blade Black Half Cut Cell Mono Solar Panels
• 5KW Sungrow inverter with WIFI monitoring
Total System Cost:
$10,677
Less STC Discount:
$3,400
Purchase Price:
$7,277
Less Deposit:
$728
*Balance Payable:
$6,549

Company #4
6kw SMA Inverter with 7.8kw of panels 1 $10,070
6KW SMA Inverter with WIFI – 10 year warranty
26 x Canadian Solar CS3K-300w – 10 year product warranty (Total 7.8KW)
Clenergy Mounting System 10 year warranty
Installation and Service 10 year warranty

Upgrade to Jinko Black frame Mono Panels 1 $10,605
6KW SMA Inverter – 10 year warranty
21 x Jinko Cheetah 370w JKSM3-CFCA-370 – 12 year product warranty
Clenergy Mounting System 10 year warranty
Installation and Service 10 year warranty
SMA Energy Meter 2.0 1 $620
For monitoring usage in the home
7.8KW STC Rebate 118 -$35 -$4,130
✓ Advertising Sign for three months 3 $0 -$100
$100 unit
discount
-$300
Total with GST $5,640

6KW Enphase with Canadian panels 1 $11,125
$3,185 unit
discount
$7,940
20 x Enphase IQ7 Micro inverters – 10 year warranty
20 x Canadian Solar CS3K-300w – 10 year product warranty
STC Rebate Included – $3185
✓ 7kw Jinko Plus 370W Black Frame Mono Panels 1 $12,260
$3,710 unit
discount
$8,550

19 x Enphase IQ7+ Micro inverters – 10 year warranty
19 x Jinko Cheetah 370w JKSM3-CFCA-370 – 12 year product warranty
STC Rebate Included -$3710
Installation with 1 $0 $0
Clenergy Mounting System
Envoy-S Metered (Battery Ready, Consumption & Production Monitoring)
1.2KW Enphase Battery 1 $1,990 $1,990
✓ Advertising Discount – Sign for three months 3 $0 -$100
$100 unit
discount
-$300
Total with GST $8,250

Thank you for any advice you can give.
Di

Comments

  • Have you considered this:

    https://www.ozbargain.com.au/node/553713

    (I am in no way affiliated with them)

    Let me give you my experience. I added 5KW solar from a company probably around 4-5 years ago. The system cost $9K thereabouts for a 3 phase Fronius invertor and panels with ok specifications.

    The system has been working great - but the thing is you don't get much for exported power anymore, and since you can't easily see how much you are consuming, it is hard to see how much you have saved.

    The bottom line is I am not sure if I am at breakeven yet.

    If you buy a system that is much cheaper - and reasonable (but not the best components) you will pay a lot less initially and the payback period will be shorter. If I had to do it again this would probably be my strategy.

    Just my two cents worth.

    • The bottom line is I am not sure if I am at breakeven yet.

      I can answer that for you…

      I'm in Sydney and I have a 5KW system as well for the past 3 years on average the system produced about 5MWh per year ( from the monitoring App i have ) and i paid about $6000

      if we assume i consumed all that energy that was produced. @ $0.28 per Kh (charged by AGL) for 15MWh over 3 years that is $4200 so i am no where near pay back or breaking even

  • Company #4 price is hard to read the way you posted

  • I've changed this a couple of times after re-reading your post. I think you really need to work out if micro or string inverters are the way (you mention some morning shade), and I think having someone come on site to help you with that decision is best. That's going to have the most influence on what you go with, and they'll have some better idea of what the patterns are over the course of the year (ie. is that shading 12 months a year, or just from the direction of the sun in Winter?).

    You should also read about oversizing, it's best to have more panel capacity than your inverter output (it will be limited to what the inverter can do, but at least you'll have that maximum for a longer period and better output in non-summer months); https://www.solarquotes.com.au/blog/oversizing-solar-arrays/

    The other thing is what aspect you have on your roof, and how much space you have (ie. North and West are good). Some of those higher density panels (370W vs 300) may be worth looking at if you're limited on space. You should also check out reviews for all the companies, it shouldn't just come down to price because the installer and how they advice (layout, etc.) has value beyond price.

    If you do go down the Fronius path, take a look at the "Fronius Smart Meter", it allows you to monitor consumption, generation, feed-in in detail so that you can change your usage patterns.

    Putting all that aside, the quote from company 4 #2 looks to be a fairly big system at a low price and you'll probably get the fastest payback on it (if your shading issues allow for a string inverter). I would be very nervous though buying from someone that hasn't come out for a physical on-site quote. If you liked one of the installers maybe it's worth using that other quote as leverage to negotiate, or keep looking around for another installer that is prepared to come on site for quoting?

  • Too much to read, but what I can suggest is make sure you dont cheap out on the inverter and get one with a decent warranty of at least 10 years

  • Don't worry about companies coming out , they can take a satellite image and map it our fairly accurately.

  • I wanna check if I am missing anything here,
    Noticed the cost not recovered seems not to meet with 9k and 6k systems,
    Also the quote above seems on the higher side in perspective of payback time.

    We should not fall for the advertised price of really low as 3k (those Sounds like trap)

    But I got the following quote please help me understand if its reasonable or I am missing any point.

    18 X [JKM370M-66H] Jinko Solar Cheetah Plus Mono-Facial 370W Black Solar Panel
    [SG5K-D] Sungrow 5kW Single Phase Inverter/Monitoring: WIFI/LAN
    18X[1P-TLMK] Tile Mounting Kit 1P

    +Installation(Conduits & Cabling Included,
    Mounting Compliant to Australian Standards
    Installation by CEC Accredited installers
    10 Years Warranty on Workmanship
    Lifetime Support on the Products)

    So with Sungrow 5kW inverter 
    =$6869.09. -3636.0 Rebate =$3920

    Same combination
    With SMA Inventor

    [SB5.0-1AV-41] SMA Sunny Boy 5kW Single Phase Inverter
    =$7769 - 3636 Rebate =$4800

  • How bad is your shading issue? If it's quite bad (like mine, i wish i knew more about solar back then), go with enphase rather than solaredge. If it's only a few panels affected, you can go with SMA inverter and few Tigo optimisers for the shaded panels. Tigo optimisers will cost ~85 - 100 per shaded panel depending on the installers. Although with Tigo, you won't get panel level monitoring unless you put it on every panel and set up their monitoring platform(~$600 + installation).

    My rule with solar is that go with the biggest system you can get on your roof & distributor's limit.

    In term of price, it varies a lot due to different reputation & workmanship of the installers. I can't comment much on which companies do a better job, you have to do your own research.

    But for 6.6Kw system + 5 Kw inverter:
    You should expect to pay ~5k (after STC rebate) for entry level system (sungrow inverter + chinese panels). Pay ~$1k extra for Fronius or SMA inverter. Some premium installer might charge you quite a bit more. I got a quote from a premium installer, they want ~$8k for the entry system (with sma inverter).

    You should expect to pay 30 - 40% more with SolarEdge or Enphase and don't bother with Battery unless you get into one of those VPP program or get SA or Vic battery rebate.

    The last quote you have is on the lower end… Check the installer if they are well regarded.

  • There are lot of options.

    try to research and decide

  • Hey mate, I'm and electrician / solar installer. Did you end up getting a system installed?

  • Yeah, I end up getting 11kW system
    panel arrangement got to avoid shadow 100%….its going good….60kW production on good days
    Thanks everyone!

  • 30x370Longi 20N+10W + Sungrow 10kW 3Phase inverter