Quote Originally Posted by iceman View Post
Horus with your obviousl knowledge of the industry, could you point me to any good "economic batteries" to store my residential solar production, rather than sell it back to the grid ? I am keen but have never been able to make the numbers work when I have looked at it, admittedly not for the last 18-24 months, so much may have changed in that time.
I have built my own house battery from a repurposed electric vehicle lithium battery. Linking through a hybrid inverter and imported BMS. True storage capacity around 15kWhr. Total battery & BMS cost about $7000. My labour was about 30-40 hours. I have 5.25kWp solar and am fully self sufficient for 8 months of the year. I will add another 2-3 kWp solar before next winter to keep the EV's charged through winter

But the cheapest solar battery is your electric hot water cylinder. If you haven't already, get a solar power diverter to manage your hot water heating. For about $1000 investment you will have free hot water for 9 months of the year