I would still prefer to measure both hots cause I'm anal and don't trust the equipment to put out the same amps on both ... Also would be a nice indicator if there was an issue with the inverter. Unlikely but I like to see lots of info.
Have had too many pieces of equipment have odd issues that I check everything. Like the venthoods that come with the control panel miswired... VFDs are pricey and not fun to call the manufacturer and have them replace cause it was wrong... Also had bad commercial surge suppressors out of the box for the POS systems..
I have a trust issue with manufacturers and their products...
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