I like the idea of a modular battery such as Sungrow SBR series for the ability to scale up: https://www.acsolarwarehouse.com/news/sungrow-battery-and-hybrid-i

I like the idea of a modular battery such as Sungrow SBR series for the ability to scale up: https://www.acsolarwarehouse.com/news/sungrow-battery-and-hybrid-inverters-simplifies-solar-and-storage/ https://www.acsolarwarehouse.com/news/sungrow-battery-and-hy... Each module is 3.2kWh. Can start with a small stack of 3 modules (9.6kWh), knowing this can be trivially upgraded 2.6x later without blowing out the cost.