Hi everyone, I'm VE & battery system newbie, so could I ask for some help on understanding the VE Rule of 1 & the minimum battery sizing rules?
I currently have 11kW PV system (35x315w panels & 2xABB Powerone Inverters, a 5kW & a 6kW) plus my enitre house runs off electric, including the water supply. Therefore I'm looking to add a battery system to improve my self consumption plus backup due to electric prices and grid brownouts.
Unfortunately due to the grid going into our separate garage plus the PV located on our house; I need battery system which supports PV generation on the micro island output. I know VE Multiplus II & Quattro II support this but:
Question 1: Do I need:
- 3 x 5000VA Multiplus/Quattro II to support my 11kW PV generation based on the Rule of 1 webpage OR;
- Could I get away with 2 5000VA Multiplus/Quattro II, taking I only export 9.5-10kW to the grid, due to PV genration efficiencies & loads?
Question 2: Assuming I need 3 x 5000VA Multiplus/Quattro II & I have 11kW PV, will I need:
- 7/8 PylonTech UC2000 battery modules based on minimum battery capacity from AC-coupling webpage OR;
- 12 PylonTech UC2000 battery modules based on Multiplus/Quattro/PylonTech webpage OR;
- Can this be reduced below 7/8 PylonTech UC2000 battery modules?
https://www.victronenergy.com/live/ac_coupling:start#:~:text=In%20both%20grid%2Dconnected%20and,3.000%20Wp%20installed%20solar%20power.
https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom
Basically, do I need 3 x 5000VA Multiplus/Quattro II plus 12 PylonTech UC2000 battery modules due to my 11kW PV generation or can this be done cheaper?
Thank for your help in advance.
Cheers
Neil