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
BFL13 wrote:
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.
I was specifically asking the guy about the AC input side and I asked at least a couple of times, same for the 935 watts. I wouldn't put a lot of credence to what he said.
ANSI sets the standards for utility supply voltage, ANSI C84.1 info. here from P&G Then the NEC allows max. 3% or 5% drop to the point of utilization in addition to the min. ANSI supply voltage. There will be some kind of standard for voltage rating of portable equipment NEMA I think - tried to find it once and didn't. The P&G info. says according to NEMA standards, appliances and motors should be able to operate at +/- 10% of the nameplate voltage which would make the min. 108V if nominal/nameplate is 120V. Maybe that's where 108 comes from?
