Why 108 Volts for Watts Ratings?
The specs for various brand converters use 108 volts for their input ratings. If a converter is rated as having a max input draw of 15 amps at 108v, for 1620w, what would be its draw using a Honda ...
Forum Discussion
smkettner wrote:
What voltage would you use to list maximum amps required on the safety label?
I think the max amps rating is a guide to what gauge wire and amps of circuit breaker is needed to run the converter.
So it is either a 15 or a 20a circuit needed, and that should be indicated. Also of course, the deck mount ones should have a 20a plug in their input wires if they need to be on a 20a circuit.
The non-PF corrected PD9280 needs a 20a circuit, but the PF corrected PM3-75 only needs a 15a circuit.
Perhaps they chose 108 as being at the low end of the operating 105-130v range to allow for how the amps go up when the voltage goes down, so to get max amps you would take the lowest voltage. It is all probably laid out in the NEC somewhere?
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I think the Iota guy meant that input current went down with output voltage going down, not with the input voltage going down. They use their output voltages as their "stages" The converter will draw less VA from the generator when in 14.2v Absorption voltage, than at 14.8 Boost voltage.
