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BFL13's avatar
BFL13
Explorer II
Mar 21, 2017

Panel Wattage Rating Question (Midnite Mystery?)

I am confused about how they do the panel wattage at 12v vs 24v for a controller. EG, the usual blurb seems to be that output wattage rating for an MPPT (EG Morningstar 60 amper is 800/12v and 1600...
CA_Traveler's avatar
CA_Traveler
Explorer III
Mar 21, 2017
MrWizard wrote:
i'm only taking educated guess's, but that what it seems like

as voltage input/output goes up they have derated the max amps

to compensate for the internal stress produced by the higer voltage
Certainly possible. It's also possible that the MPPT 60 could produce a few more amps than 60 at 12V but they just use a fixed cutoff for all battery voltages.

I'm sure a lot of factors are involved including technical and non technical product considerations.

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