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Old 10-20-2019, 12:52 PM   #6
Ski in NC
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City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,403
Dave, where did you get that 8.5A for the 40A charger? Seems high. It can provide 40A on three channels, but that is total, not 40A for each channel.

I have a 20A charger and when I first kick it on with low batts it is like 3A.

So thinking a 1000w gennie is probably fine.

To the OP, measure the amps the charger pulls with batts sorta low. Measure right when it kicks on.
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