It's about time I have lights in my home.


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Godoh
Guru

Joined: 26/09/2020
Location: Australia
Posts: 712
Posted: 01:37am 02 Oct 2025      

The point Aaron made about GTI inverters is not to use them on grid.
We use them to supplement our battery inverters and also to use the MPPT controllers built into them.
I use a 3kw battery inverter connected ( AC coupled ) to two 5 kw GTI inverters.
We have an electric car and with a battery inverter on our 24 volt system I was able to charge the car with around 2kw maximum.
By using the grid inverters that have a solar array connected to each one, then I can charge the car with up to 5.5 kilowatts when the sun is out as well as charge the house batteries.
We do not have a grid connection. I haven't had one now ( except for one one year stint) for 50 years now.
The grid tie inverters are really cheap second hand, and have really good mppt controllers built in.
Most want fairly high panel voltages to work, but that would just mean that you need a sparky to connect the cables from the panels to the GTI inverter. But you will need a sparky to wire the 230 volt parts of your installation anyway so it won't be much more cost.

pete