I have inverter questions hooking up to a off grid house electrical panel

[Mike90250]

With a 120V house panel, you must use a pure sine inverter, and use it's ground connection to a grounding rod

Mod sine inverters will not work in a grounded environment, either blowing up instantly, or giving you a 55V shock when you touch an appliance, Mod sine cannot be used in a house with any grounded appliances.

A normal generator is just fine.

[Lorenzo]

With a 120V house panel, you must use a pure sine inverter, and use it's ground connection to a grounding rod

Mod sine inverters will not work in a grounded environment, either blowing up instantly, or giving you a 55V shock when you touch an appliance, Mod sine cannot be used in a house with any grounded appliances.

A normal generator is just fine.

I did not know that grounding limitation about mods. And all of my outlets are grounded because its a county requirement. I couldn't find that info anywhere.

But I do wonder why the mods have grounding connections.

Thank you so much. I will act on your information. A pure sine inverter is about twice what a modified sine wave inverter costs but I'll do it.

About grounding, may I attach the inverter grounding connection to the same copper 4 AWG grounding wire I used to ground my panel? I bonded the grounding wire by wrapping it around my (18"x24") footing steel for 25' to a 6' embedded steel rod at one end and the panel at the other.

From what I've read here, I figure a 3000 watt inverter will service my needs with a 30 amp circuit breaker in my panel. The same 30 amp breaker my generater uses to supply power to the cabin.


And if not a 3000 watt inverter, maybe a 6000 watt inverter with a 50 amp single pole circuit breaker.