Dumb Question Regarding the Growatt 12kW 48V 250VDC 120A Off-Grid Inverter

newbostonconst said:

I do agree that their wording in the manual does not state it will work, but the advertisements do say split phase...

I was close to buying one but haven't.

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Off Grid Solar guy said:

I wouldn't buy one. Busbars are way to small to fit correct wire size. You need a 4awg for 80input. You cant break off strands to make it fit as its against code and unsafe as loose strands can arc over time and cause heat issues. Inverter Breakers are unlabel so you must use 60c wire amperage chart even if your using 75 or 90c wire. 75c is common for household breakers/panels. But again inverter breakers are unlisted so must use c60 amperage chart. Or at least unit I had for a client had breakers unlabeled. Which means you can't use 6awg wire as it rated only at 55 amps. You would need bump it up to 4awg wire.
I just pull breakers and put 2 pole ul rated 75c breakers in with larger busbars in to accept 4awg for input (80a) output is (63a)

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J.P. said:

I installed my new 12kw 48V Growatt Inverter today and I am not getting the expected output.

The manual says for 240V installation to NOT hook up the Neutral wire from the output. I get 240V across H1 & H2 but only 75V from H1 to Neutral/Ground and 75V from H2 to Neutral/Ground. Is something wrong with the inverter? How do I get normal USA 120V on both H1 & H2 for our normal single phase 120V + 120V = 240V USA electricity?

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