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Although not mentioned in the specs, from discussion here on the forum, the DC power supplies are derated at lower voltages. One discussion I read the 250W PS is derated to 150W at 12V and another thread said 100W. I am guessing it is not quite a hard cutoff but rather drops off on a curve and that the lower the voltage, the lower the maximum wattage.

Are the smaller 150W DC switches the same? What would their wattage be at 12V? At 11V? At 9V?

Are the smaller 150W DC switches the same? What would their wattage be at 12V? At 11V? At 9V?

<10 volts = 100 watts max load
10-10.99 volts = 125 watts load
11 volts of greater = 150 watts load


err..trying to copy in graph....not letting me for some reason

Thanks Dave. So on this model there is no penalty to run it on a 12V system, unless you run down the battery.

Les, correct, no penalty, it is just more efficient if you run from a 24 volt battery system, but also ok to run on a 12 volt battery system.