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Old 12-12-2012, 10:41 AM   #1
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Solar Controllers...

Can I use two different solar controllers to charge the two batteries in my rig? The controller on the roof is a 30 amp controller. I have an installed solar panel on my roof and I want to add a portable panel that already has it's own controller. Will this cause any problem?

Thanks, John T

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Old 12-12-2012, 10:50 AM   #2
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Originally Posted by clicker187 View Post
Can I use two different solar controllers to charge the two batteries in my rig? The controller on the roof is a 30 amp controller. I have an installed solar panel on my roof and I want to add a portable panel that already has it's own controller. Will this cause any problem?
I hope not...I basically have a similar situation with a 3 stage converter and a 3 stage solar controller... I will be interested to see what the responses are.

I guess I was thinking the two controllers would basically come into synchronization before long - after all, they're both sensing the battery voltage and would come to similar conclusions about the battery states.
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Old 03-01-2013, 12:59 AM   #3
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Make sure your charge controllers voltage sensors are attached at the same location to get the most accurate voltage reading possible, this way one controller isn't constantly sensing a different voltage than the other controller therefore being forced to work harder.
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Old 03-01-2013, 07:30 AM   #4
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As long as each system contains a blocking diode to keep power from one from feeding back to the other, you should be okay. Fortunately most solar charge controllers already contain a blocking diode to prevent current from other charging sources (such as shore power) from flowing the wrong way through the panel and controller.
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