Having inverter issues. (Long post)
When I bought this coach it had an inverter that was not also a transfer switch (separate charger and inverter) so there was one transfer switch that controlled the switching between shore power and g...
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With dual input the neutral will carry the sum of the hot loads. The load is not likely to be split evenly by the neutrals because of the different impedance of the two wires. And the difference could be enough that one neutral gets overloaded.
I made my suggestions to try and narrow down the problem. But now since the problem may not occur for months I'd do a permanent 3 wire input with the wires large enough to carry the full amps of the two hots - ie the neutral will need to carry all of the amps. And frankly your bench test is meaningless since it can take months to fail in the rig - so it could be the inverter but maybe or maybe not.
And with 2 new and totally known output circuits wait months to see if it fails and if so that would point to a inverter design problem.
I made my suggestions to try and narrow down the problem. But now since the problem may not occur for months I'd do a permanent 3 wire input with the wires large enough to carry the full amps of the two hots - ie the neutral will need to carry all of the amps. And frankly your bench test is meaningless since it can take months to fail in the rig - so it could be the inverter but maybe or maybe not.
And with 2 new and totally known output circuits wait months to see if it fails and if so that would point to a inverter design problem.
