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Chargeing 2 battery banks with the same panels...

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Posted by Merlin-7 KI4ILB on October 22, 2006, 7:02 pm
note:  I have 300 watts of solar panels chargeing my battery bank.

I also have an extra morning-star 4.5 amp charge controller.

I would like to tie this into my solar array to charge things like my lawn
mower battery in winter etc.

However since I have seen my panels put out 15amps I will need something to
limit the current to 3 to 4 amps.

Is there an easy way to do this without wasteing power in the form of heat?

What are my options here? Maybe someone can think of something that I have
overlooked, I am bad about not seeing the simple solutions sometimes.

Posted by Bill Kaszeta / Photovoltaic Re on October 23, 2006, 2:20 am

1. Use a Single Pole/Double-Throw (SPDT) switch on a single PV module
to switch it to the secondary regulator and battery when you need to
charge the smaller battery.

2. Just connect the smaller battery to the larger battery bank, use a fuse for
Bill Kaszeta
Photovoltaic Resources Int'l
Tempe  Arizona  USA

Posted by Landline on October 24, 2006, 8:29 am
 We use Bill's method 1 find it works well and is a good option.


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