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 start. I prefer grid tied with battery back up on 24v or 48v batteries. I would also like to be able to plug in a generator to inverter and charge batteries if grid is down or no sun shining. I live on a farm in arkansas no restrictions I’m thinking ground based for easy maintenance. Oh and I would like to be able to program units without Bluetooth in case phone until available to see programming.Any suggestions please thanks