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Old 17-07-2012, 10:52   #1
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Help - Solar charging confusion

Just installed a solar panel on my boat to provide some charge while I'm on the hook. Hoping someone might be able to offer me some assistance regarding the controller. I recently purchased a Sunforce 12v 10amp controller, have it up and running and wondering if I have an overcharge issue.

My house bats are also hooked up to a Xantrex battery charger pulling from 110 shore power for typical charging. When my Xantrex charger is on, the solar controller never seems to indicate a "float/maintain" state even though the Xantrex charger appears to be in a float/maintain state. Instead the charge indicator on the controller is lit.

Only when I turn off the Xantrex does the indicator on the charger flip over to a float/maintain state from charge. Would this indicate that there is simply a continuous flow of charge into the battery even if they are being float/maintained by the Xantrex?

Thanks in advance for any thoughtful advice you might have!
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Old 17-07-2012, 18:52   #2
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Re: Help - Solar charging confusion

Both chargers are reacting to the battery voltage. The Xantrex may be set at a slightly lower float voltage than the solar controller. A good PWM solar controller will go into equalization mode for a while, which is higher than float mode.
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Old 17-07-2012, 18:58   #3
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It's not really a problem, just the solar has a slightly higher set point to enter float mode

Dave
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Old 18-07-2012, 11:46   #4
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Re: Help - Solar charging confusion

Thanks all for the advice! Consensus seem to not sweat it . . .though I'll keep an eye on it just to make sure.

Cheers,
Chuck
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