Is This a Good Solar Deal?

System Size : 11.7KW
Panel : Trina vertex s+ 435W
Inverter : Enphas IQ7A Micro inverters
Price : $13K after STC discount
Location: Sydney
Installer: Top Installer with 4.9/5 rating on solar quotes.

Comments

  • How does it compare to your other 2 quotes?

  • 1 installer doesn't provide the enphase inverter and other was 2 grand higher but price matched. So I am opting the one with better reviews and reputation.

  • +2

    for a micro inverter system that price is quite decent, but question is do you really need micro as you can have a string system for only half that price or so with same performance, if you don't have shading it will be a big waste of money.

    • TBH I don't have any shading issues. Just for better monitoring and scaling perspective I have opted for microinverters. String inverter for same configuration is costing me around 2 to 3k less.

      • +1

        How likely are you to ever scale it up? 11.7kw is already a large system. I don't think you can go much bigger unless you have 3 phase or are planning an off grid system

      • +1

        Just for better monitoring and scaling perspective I have opted for microinverters

        Only if you expect to claim warranty because an individual panel fails

        I'd look into what monitoring is available. My power distributor in Melbourne has a pretty good portal that shows net use and exports 30 minute basis (I assume it is what they use for billing). I hardly look at the app for my inverter anymore. I use the portal to compare week on week, month on month, this year vs last year etc.

      • +1

        Hard to justify the ROI on that 3k

        A decent string inverter like fronius etc would end up with pretty much the same overall generation over a year as the individual micro inverters but result in a simpler/cheaper install.

        You can easily view monitoring via fronius web portal/apps, export monitoring info to sites like pvoutput to provide overall system health info.

        Without shading issues or crazy roof top configs with multiple directions etc, paying 30% more for microinveters doesn't seem like a good investment.

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