You don't need an inverter if you're just using an rpi. You can get away with a cheap 12v car USB adapter. I do this for my off-grid wifi (rpi and 5g phone pl

You don't need an inverter if you're just using an rpi. You can get away with a cheap 12v car USB adapter. I do this for my off-grid wifi (rpi and 5g phone plugged into USB).