Join Date: Jan 2003
Location: Maine Coast
Thanked 295 Times in 228 Posts
Rep Power: 17
Re: Batteries don't stay charged
3. No, the solar panel doesn't act as a "load" on cloudy days, it simply doesn't produce any output. Also, most panels have a diode to prevent current from flowing back to them. If the diode is damaged...maybe, but unlikely.
There are many, many, many el-cheapo solar panels out there with no blocking diodes in them. If using them without a controller they can become a load.. Many panel makers figure you will be using a solar controller so not all panels come with blocking diodes..
-Maine Sail / CS-36T
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