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Old 05-10-2008, 10:13   #1
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Charging 48v battery bank with solar panels


I have a 48v battery bank and am looking to install roughly 300ah worth of 12v solar panels. Does anybody have a recommendation for a charge controller which can take a 12v PV array and charge a 48v bank?


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Old 05-10-2008, 13:24   #2
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Something's awry with your figures. A 48 volt battery bank on a 27' sailboat? Why? Did you really mean 48 volts?

Also, 300 amp-hour panels? Panels are generally rated in watts (volts x amps), corresponding to the maximum amount of power they can supply when in bright sunlight.

Wanna try again?


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Old 05-10-2008, 13:28   #3
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I've got the components after much research but not yet put it together so others may give better advise. (just had to go sailing away from the winter mths) I went for the outback MX60 controller & 2x40v panels.(used for house / grid installations) for 400w hoping for 300w usable. The MX60 can take up to 160v o/c input & the output adjusted to suit 48v . The higher input voltage means lighter wire. (but the MX60 is as heavy as anything made to mil specs 1970!!)

Regards Bill Goodward
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Old 05-10-2008, 13:55   #4
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Most modern panels out out much more than 12v. There are many now that put out more thant 48v. Get those panels, and a blue sky or Outback controller, and you are set.

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