Forum Discussion

MrWizard's avatar
MrWizard
Moderator
Jun 24, 2015

why don't Solar controller mfg/sellers use honest ratings

example most 30amp controllers are listed at 390w of panels and 40amp controllers at 500w of panels but we don't charge batteries at 12.0v we charge at 14v or higher 14v*30 amps 420w output, ...
MrWizard's avatar
MrWizard
Moderator
Jun 25, 2015
I see some understand...And some still don't get it..!

The point being is if you buy a PWM controller with a stated limit like 390 watts, and you abide by that limit, you will never have 30 amp charging, it's not possible when the panels sustained ability is only 22.xxx amps
When buying in the solar market, it's buyer beware, go in eyes wide open question everything you read from sellers

Grizzman do you have a link?

I'm still shopping for a controller to be my spare

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