If a normal install, the shore power and generator will go through a transfer switch then to the inverter. If when inverting 120 VAC circuits are OK, then the problem must be before the inverter. I would suspect that it is the transfer switch.
Disconnect shore power, make sure generator in NOT running then take a look at the transfer switch these are in a boat or RV but either can lead to vibration problems which can lead to loosening wire connections which can lead to heating and burning. It may be something as simple as a wire coming loose. (Which could be dangerous!)
Whether or not the contacts in the relays are OK, check and/or tighten all electrical connections. It's a good idea to check and tighten all electrical connections regularly.
Some transfer switches can be repaired by replacing just the relays. Other units (like mine this year!) will need to be replaced entirely.
SOURCE: I have a motor home with a Trace inverter/charger.
More than likely you may a a relay that is stuck or not energizing which should switch the charging mode over automatically. Trace back from the generator to the charging circuit for the batteries. I'm not sure where the relay (or solinoid) would be located but you can be assured it is something in the charger sensing/switching circuit.
Good Luck! Gary
SOURCE: My trace inverter SW2512 will only allow pass through power.
First problem is caused by the new generator producing too high a frequency... 65 Hertz is above the inverter limit. Adjust the governor down to 60 or 61 Hertz.
Breaker tripping may be due to excessive current draw from the Honda. Check the max AC input menu on the inverter. It might have been set lower to avoid overloading the original generator but if DC power was turned off at any time while you were changing generators, the inverter would have returned to it's default settings which may exceed the Honda's capacity.
SOURCE: I have a trace inverter DR 1512, I am having a
the solar panel is just to charge your inverter,if it is charging and the inverter is on it will drain the current the solar panel is supplying to the batteries,this makes it look like it is not charging ,so i advice you to switch off you inverter when charging it,get another set of batteries connected to your solar panel then charge both, let them be separated so that the new one is not in use so that when solar is out you can switch to the other set of batteries
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