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Quote: Originally posted by JTQU on 21/7/2016
No panel over about 10 Watts should be used without a controller whatever time of the year. It is not a case of getting more power from it but regulating things to get power only when needed otherwise the battery will be damaged.
Shhh dont tell anyone, but during the winter i would use a 25w panel without one, if the weather was quite bad with little light i may even goto 2 panels.
shh secret though and not recommended.
As you say a charge controller should be used, but with a small panel and inefficient controller it may cut the charge down to almost nothing.
I probably have a bit more kit to keep an eye on the charge / current / voltages than others though.
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Topic: Solar panel charger
