Can I start with what is your reason for wanting a battery?
Whether that is a suitable design depends on your electricity usage and when you use it. If you use all of your solar energy as you produce it, you won’t have any leftover to charge your battery. Has the quoting company gone through this design process with you?
The reason we would like a battery is because we are not home during the day to utilise the solar power to its maximum potential. We live on 5 acres which is irrigated and have a number of pumps to supply our home with water (on rain water) and also water troughs. Our power bill is huge in summer (around about the $1k mark).
I am over paying large electricity bills and would rather put that sort of money into solar.
Is it true that the government will in the near future subsidies batteries?