Power supply & Power inverter for boondocking

A larger power supply - converter/battery charger - is very relevant to boondocking since it's primary benefit will be reduced battery recharge times. I'd say the bigger the better, matched to the size of your battery bank (max charge rate around 20% of the 20 hr amp-hour rating for wet cell battery). 3000 watt inverter not so much. But - just because you have it doesn't mean you need to use it, it will be as efficient as a smaller one for small loads so no real loss, it should be able to power up a coffee maker or a microwave for midnight snacks with no generator, and it could come in useful in some unforeseen emergency. Plus the one you have is cheaper than the one you don't have. FWIW I have a 3000 watt inverter for boondocking and it works great, although the primary use is running an air-conditioner while I'm traveling on the road.

Brian