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Sorry for this [again] but I can't find the answer :-
I have a similar small solar panel to this
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propped up inside the front windscreen to catch the SUN . . . I've got it plugged into the ciggie socket [which is always live even with the ignition off], when I connect my little voltmeter across the ciggie plug it registers [when sun out] 21.1volts . . . Should this not be internally regulated to max 12volt ?? and more importantly, will it do any harm to the battery ?
______________________________________________________________ * As far as I know the info I post is correct - but to be on the safe side you are advised that (a) I´m not always correct and (b) I´m not always correct
The following members of MHF thanked vicdicdoc for this posting
As a rough guide if your battery is ten time bigger in Ahr than the max output of your panel in Watts then you don't need a regulator.
So lets say your vehicle battery is 85Ahr then you could have say a 5W or 8W panel. I expect yours may be as low as 4W (inside a window) so well safe.
______________________________________________________________ Regards Frank
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Should this not be internally regulated to max 12volt ?? and more importantly, will it do any harm to the battery ?
That panel has such a low output it probably can't damage the battery anywhere north of Fez.
Your voltmeter draws no current, so the reading is not the one when actually doing some charging.
Find a small 12V bulb struggle to juggle the panel, voltmeter and bulb all connected together and you'll be lucky to see 12V on your meter. This is real world conditions.
______________________________________________________________ Brian
The following members of MHF thanked hilldweller for this posting
sounds to me as if the soalr panel is not actually connected to the battery - as soon as it starts to drive a current the voltage will drop to the battery voltage + a volt or so (if you're lucky). Generally the small portable panels need no regulation because there's nowhere near enough power output
______________________________________________________________ "All you need in this life is ignorance and confidence; then success is sure." - Mark Twain (1835-1910)
The following members of MHF thanked Bagshanty for this posting
Again MHF to the rescue & the answer to my question - many thanks, maybe one day I'll be able to answer your queries & help you.cheers
vic
______________________________________________________________ * As far as I know the info I post is correct - but to be on the safe side you are advised that (a) I´m not always correct and (b) I´m not always correct
The following members of MHF thanked vicdicdoc for this posting
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