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can I use a 12 volt solar charge controller to charge two 6 volt 4.5 ah lead acid batteries connected in series with a 12v20watt solar panel?
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- Skoda JohnLv 76 years ago
Yes but they have to have a similar state of charge. The charging system will only charge them until one is fully charged. If you start with one fully charged and one flat the flat one will not be charged.
You get the same issue with 2 x 12v batteries on trucks.
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