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Old 07-25-2017, 04:26 PM   #1
Mini-Skoolie
 
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Charge controller size (amps)

I just picked up two 255 watt panels and 2 costco golfcart batteries 210ah 6 volt. I plan on hooking the batteries up in series to make a 12 volt system. Im having a hardtime figuring out what size charge controller that i need. Can anyone help me out ?

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Old 07-25-2017, 04:36 PM   #2
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Allowing for the usual deratings, a 30A charge controller would work for that much PV power. However, if you get more panels in the future you will then need another CC. Why not get a 45A or 60A CC now, then you've got room to grow.

John
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Old 07-25-2017, 04:43 PM   #3
Mini-Skoolie
 
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Budget. I found a decent 30amp mppt charge controller for 99.00 cheapest 60amp was around 500.00


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Old 07-25-2017, 05:08 PM   #4
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If your panels actually output 12v, 30A is only good for 360 watts. My panels put out 18v or so, so 30A gets me up to 560W. I have 4x 100W panels and use the Wanderer 30A PWM charger. It's a budget charger but does a great job, I have the same unit on my bus and on my boat (2x 100W panels on the boat)

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Old 07-26-2017, 02:10 PM   #5
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Ok sweet , i will try that first and see how it goes. We are getting the panels at 120/piece so we will probably add more over the next year

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