sorry I should have been more clear. The picture is not current, since I took that picture I replaced the wire coming off the resettable breaker on the right with a 2/0 wire about a 3 or 4 foot run to the batteries. The far left side of the picture if you count down to the 3rd wire that is the 6 awg that goes approx 12' into my wiring mess and into that 6,8,10 wirenut I described earlier. As far as the little jumper wire and the 2 thermal breakers I don't know what that is all about. someone asked earlier about what generator I have an on board onan 4k.
I can't remember if that Onan is the one with the MSW "120v" output that is not so good with PD converters, making their output DC amps lower than would be on inverter gens. If so, then there is where some of your amps are going, so fixing the wiring won't help.
Ok, so perhaps upgrading the wiring would help. If you can test first before buying the wire that would be good. eg, I happen to have a set of 25 ft jumper cables that are rated equivalent to #3, and tested with that from DC panel to battery. Big improvement over OEM wiring! But I wouldn't rush out and buy a set just to test this.
You can double the wire paths and that way just leave the existing wire/frame paths and get more amps.
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Here is Wayne on that: I don't know if the Op has the same Onan though.
Wayne Dohnal wrote:
Here's an Onan microquiet driving a PD9160A at its full output (voltage on top, current below):
And the same Onan driving a 15 kbtu air conditioner:
My belief is that the non-resistive loads cause the AVR to corrupt the waveform. In the case of the PD converter, the generator voltage peaks are lower than they would be with a good sine wave, and the converter needs these peaks to be correct to produce its full power. An eu2000i maintains the peaks, and the converter is happy.