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My rule#1 for buying an alternator is if I can't get an amp versus rpm curve I don't buy it. The amperage rating can be VERY deceptive, especially at low rpm.
So sounds like marketing slant to me.
If you list specifically what the rated amperage draw is on your major components we can help you decide what you need.
Remember that the centrifugal devices (like the water pump and fan) amp draws varies with voltage. Centrifugal devices in general...
Dadsbee ,
Helicopters need 200 - 300 Amps for ground starting , but once in flight , they require generally 120 amps for standard operations….
Yours , Craig….