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I'll see if I can find you a diagram/website later today, but I'm out the door right now................

But basically you can tell him to ignore the 240v/120v part because every panel is about the same.
It's the breakers and wire size that makes the difference and most every panels can accept both.
 
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Did you find that link / site ?
Oddly no one else has said a peep, this would also be useful info for other folks out there too that want to wire up 120V only in their cabins, hunt camps and homesteads.

I'm so sorry, I completely forgot all about it.

There was only one modification needed to do what he was wanting to do.
Make sure your friend understands there's a lot of caution that needs to be followed here.
Separate grounding not tied to his other system, wire size, etc. I might even put a lock on the panel so no one can fool with it that doesn't know what they're doing.


Here's a picture........




And a little explanation......

Re: Connecting/Hard-wiring inverter to AC Panel offgrid

Welcome to the forum.

Standard North American AC power is 240 Volt split-phase, meaning there is a center tap which provides neutral for 120 VAC on either side. In essence 120 VAC inverters just put out half of this. It is not a problem if you don't need 240 Volts, which you probably don't.

You can in fact wire the two 'hots' of a 240 Volt service together and power them from the same 120 Volt hot, especially with a small inverter (it will invariably fault and shut down before any part of the wiring overloads). Keep in mind that a 2kW inverter is roughly the equivalent of a single outlet: 15 Amps * 120 Volts = 1875 Watts.

So the wiring then becomes straightforward: ground to the ground bus bar, neutral to the neutral bus bar, and hot to the two hot bars which connect to the breakers. A simple jumper wire and you've got 120 Volts on both.

Does that explain it?
 
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