solar battery charger
- Thread starter shaggyo
- Start date
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leg oot the bed
Active Member
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buy a new battery?
I've made my own panels from silicon solar cells,0.5 sq mt gives about 60-80 watts or 4 Amps max in bright sunshine -you need 18 volts + to charge a 12 volt battery.The smaller ones on ebay for about £20.00 do not do much,especially when behind a windscreen,and if it is coated are even worse.(do you have a/c)
You need to measure your current drain when static(put amps meter in line with batt +ve) then compare this figure with what the panel will produce remember your drain is for 24 hrs,and the panel is only producing in sunny weather.
Personally I would try and find what is draining your batt so quick,or if shot get a new one-My solar panels keep my spare batts topped up,but they are large panels
You need to measure your current drain when static(put amps meter in line with batt +ve) then compare this figure with what the panel will produce remember your drain is for 24 hrs,and the panel is only producing in sunny weather.
Personally I would try and find what is draining your batt so quick,or if shot get a new one-My solar panels keep my spare batts topped up,but they are large panels
leg oot the bed
Active Member
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if its a common problem why dont you fit a battery isolator like on a rally car, ?
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- Embasinga stocæ
yu sure yu aint gorra current leak on yo battery? get that sorted first.
darrenm
Active Member
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- Chorley Lancashire
I leave mine 4 or 5 days at a time no problem 2004 td5 Es premium
Sounds like you have a problem. Get that sorted first.
I can leave my V8 for weeks and it will start.
My last 300TDi was the same I could leave it at least a couple of weeks.
ratty
I'm not special I'm limited edition
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I leave mine 2 weeks at a time with no problem. I stuck a solar charger in my previous 110 after getting a flat battery when I didn't use it for a a month . I never got one again even thoughit was only a 1.5 watt cheapy job.
discool
Well-Known Member
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I've known even nearly new batteries to fail due to the electrolyte being to be low in one cell, hopefully you have a battery that that can be checked.
I always gone for a replacement battery with cell caps so I can check the electrolyte level and topup as required but last year I had to replace my battery after 9 years so what did I get .. for the first time a fully sealed one, it's full sealed unless I start digging around with a screwdriver. So we will see how long that lasts.
Anyway my disco was parked up for 4 weeks with this new battery fitted and started ok just the same as it does parked up over night
ricc
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i leave mine parked in the airport carpark for a fortnight with no probs, even after xmas .
