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Old 03-02-2010, 17:22   #1
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Join Date: Nov 2007
Location: Saint Petersburg, FL
Boat: Hunter 40
Posts: 113
Solar and Shore power


I have just installed a 130W solar panel on my boat. I usually plug in the boat at the dock and have the truecharge 40 at all times to keep the batteries top up. The solar charge controller is a blue sky MPPT.

I have a link 2000 with a dual shunt with one side set up to monitor the solar/wind setup. I can see that even though I am on shore power with the charger, the solar system still provides a bit of power. Sometimes the solar charge controller will show a bulk charge as opposed to float.

Is it possible that the MPPT float voltage is slightly higher than by battery charger and it gives it a bit more during the day?

Is there a problem with having shore power on at all times with a solar panel?

Just want to make sure I'm not going to ruin a part of my charging system by running both systems.

The wind gen is secured and taken switched off at the dock

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Old 03-02-2010, 17:56   #2
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Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 7,510
You'll hurt nothing, the solar is just regulated at a higher voltage.
if you have no electrical demands while at the dock, why not just unplug and let the solar keep up the batteries?
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