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Join Date: Apr 2006
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"5400W equates to a charging capacity of 450amps at 12V."
I think our casual misuse of wrods is at the heart of this.
5400W at 120VAC does not equate to a charging capacity of 450A @12VDC. It equates to a potential charging capacity, if someone invests in an expensive 1:10 stepdown transformer and some 1000A-rated diodes to rectify the AC into DC. Or these days, into a still expensive switched power supply to provide the DC.
The difference is that capacity depends on what was bult and how it was built, and these days everything is built to a price and for a purpose, a target market. Even Honda, whose gensets are widely acclaimed, states flat ou tin the manual for some that the DC output is suitable only for battery charging, and not for any other purpose, because the DC waveform is so dirty. That's made for a purpose, battery charging.
The OP's Fischer Panda apparently is made to provide AC power, with a smaller capacity DC to charge a small battery bank, or perhaps DC loads. (Who knows how clean that DC is?) Whether it is "right" or "wrong" for the built-in DC output to only provide 40A, depends on what it was built for, as well as whether it is working to spec.
Heck, my *lunch* has the capacity to power a small ship for a week. Capacity, yes, but the Mr. Fusion converter is lacking, so someone won't be able to make that happen this week. :-)
Zanshin, some time ago you lost a rudder and there was a long thread about how the post failed. What ever became of that, did anyone figure out why it broke?