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post #6 of Old 08-02-2013
Omatako
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Re: Stupid solar question

Quote:
Originally Posted by macwester26 View Post
I have a large 85 watt solar panel I was told that i should use a 15 or 20 amp controller.

The cheapest i found was £15.00 GB Pounds from eBay...

Fitted into a lift up hatch It does keep both 120 amp batteries fully charged...With no Problems.

See Here PAGE 12

By the way there is Nothing stupid about asking questions.
After all how would we know the answers..
As a simple concept, watts = amps x volts. So at 13 volts x 20 amps, the 20 amp controller is capable of managing a 260 watt array. Even at 15 amps it adds up to 195 watts. You have 85 watts. Mmmmmm.

I have two 140 watt panels that are managed by a 20 amp controller and the reason the setup continues to work is that the panels never deliver 100%. YMMV


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