Do I need a 60Hz inverter?

Here in the US, things run at 60Hz, in Europe and most other places around the world, things run at 50Hz. You’ll most likely require a 60Hz inverter if you are running a device intended to run on US power. We like to go camping and travel quite frequently.

Do I need a 12V or 48V inverter?

Simply put, if you have a 12V system, you need a 12V inverter; a 48V system requires a 48V inverter. Standard Pure Sine Wave inverters simply change DC power to AC power. Inverter Chargers handle this function plus allow you to charge your batteries off shore power or a generator. Renogy’s 3500W Solar Inverter Charger is designed for a 48V system.

Does a 60V breaker change to a 120 volt breaker?

No change: 60V hot to ground, 60V neutral to ground and 120Volt hot to neutral. I cannot see, or logically reason that there is anything between this outlet and the panel. No other circuits in the house are affected by this breaker, and with every single wire on the rest of the circuit disconnected, there is no power anywhere else. I'm at a loss.