I would look at both options looking at A MPP Solar LV6548 to run my 2 hp well roughly 4500 watts continuously not sure of surge and put a second and third possibly to carry the water heater and mini split diaikin in AC and house loads.
I’m looking to build a smaller backup system for Well, A/C and a few lights and outlets for emergency use only at first but would like to be able to expand system in the future. I want to buy the hardware thats compatible for a 20Kw system but that would allow me to only run a10KW system to...