Forum Discussion

atperci's avatar
atperci
Explorer
Jun 15, 2015

Is it possible to add switch for an additional solar panel?

I installed 2 - 111 watt MiaSole thin film panels on our MH last year. These are 12v nominal panels that output 19.4v and 5.7a at STC . I bought them a couple of years ago for $0.45/watt. They work g...
jrnymn7's avatar
jrnymn7
Explorer
Jun 16, 2015
I've seen 300w out of two 140w panels, (pointed), on a mild, mostly cloudy day, so I wouldn't count on clouds to "protect" the controller. One break in cloud cover, and some edge of cloud effect, could possibly overload the controller. You may be best to just run a separate circuit, and parallel the two systems. (Or bite the bullet for a larger controller.) You wouldn't have the hassle of matching panel specs to the old panels, either, if you went with two set-ups.

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