Solar panel starter battery charger
- Thread starter hallix100
- Start date
sure. . . .
www.t6forum.com
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[Guide] Mobile Solar Panels ? . . . - How I Did It -
Mobile Solar Panels ? . . . - How I Did It - There is loads of background to this . . . . . but for now here is a vid for you all. =] Just remember W = V*A and as a general rule a good 100W panel will give you up to 6A charge with good sun. 25w = 1.5A 50W = 3A 100w = 6A 200w = 12A 300w = 18A...
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Do you already have solar panel(s) & a leisure battery on your van?
Doubt it, it won't keep mine above 12v in winter, but I do have a tracker.
If I was buying again I'd go 50w.
Fwiw...
My test showed you needed 50w for more. With a solar controller.
I had no luck with 5/10/20w panels... And the direct plug in ones are deffo not good. (No controller)
My test showed you needed 50w for more. With a solar controller.
I had no luck with 5/10/20w panels... And the direct plug in ones are deffo not good. (No controller)
Hi, yes I do have solar panels on my van.
In that case I'd fit a battery maintainer like an Ablemail AMT12. A search will give you all the info you need. @Dellmassive has written a comprehensive "How to" on the subject.
Second the AMT-12 if you already have solar fitted on the leisure side.
For direct maintenance I believe 50mA is the threshold for a fault code for the van's ECUs drawing too much current when fully asleep, so using that as a worst case that's potentially 1.2Ah (24 x 0.05) of capacity from the battery over a day.
In watt hours that's 1.2 x 12 so near enough 15wh
So your solar panel needs to be able to replace that at the same rate. As a rough assumption assume you get a good rate for a quarter of the day (6 hours charging, 18 not charging) then you need 15 x 4 = 60w
So the 10/20w panels are likely to fall short.
For reference a normal 5mm LED will generally run at about 20mA - so the load use in the calculation is about 3 LEDs - not that much.
For direct maintenance I believe 50mA is the threshold for a fault code for the van's ECUs drawing too much current when fully asleep, so using that as a worst case that's potentially 1.2Ah (24 x 0.05) of capacity from the battery over a day.
In watt hours that's 1.2 x 12 so near enough 15wh
So your solar panel needs to be able to replace that at the same rate. As a rough assumption assume you get a good rate for a quarter of the day (6 hours charging, 18 not charging) then you need 15 x 4 = 60w
So the 10/20w panels are likely to fall short.
For reference a normal 5mm LED will generally run at about 20mA - so the load use in the calculation is about 3 LEDs - not that much.
Thank you
The AMT is easy to fit (must be if I did it) and keeps my starter battery at 12.3V permanently, no starter battery anxiety any more.
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