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I have been mulling this one over mate

http://www.maplin.co.uk/Module.aspx?moduleno=223250

My dad has a small fold out suitcase style solar panel that is hooked up to his 85ah leisure battery in his static (No EHU) this will partially re-charge the battery maybe over a week or so when its empty buy if the van is in use it really doesn't make much difference.

You need to work out what power you need during daylight to re-charge the battery then see if the solar panel will match that requirement, also bear in mind that in winter the sun is lower etc and not as powerful !!

maybe buy a pedal operated generator, that will keep you fit too!!

We used to stay on a non EHU site for 2 weeks and had two batteries, one was usually on charge at the local garage.

I use 2 x 40watt solar panels on my roof , i would say 80watts would be the minimum you'd want , but it all depends on what you use in your caravan . Have changed all my caravan lighting to Leds .

See here for panels Click_here . and here http://www.1carpc.co.uk/wcdr/new-page-2.htm

atb

Wizard

Quote: Originally posted by Sproz on 21/10/2009

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maybe buy a pedal operated generator, that will keep you fit too!!

We used to stay on a non EHU site for 2 weeks and had two batteries, one was usually on charge at the local garage.

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just found this on another thread brilliant

ihttp://www.theglowcompany.co.uk/acatalog/GAZELLE-POWER-PEDAL-GENERATOR.html

I put a 10kW installation on a building. I went in in December and it was generating 160W. That's 1.6% of the output. Throughout the year you would get an average of 10%. You will get a lot more in the summer than this time of year. Stronger sun and longer days.

Wizards 80W would probably give 20W for 6 hours which is 120Whr or 10 Amp Hours per day. So your 110AH battery would take 11 days to charge.

BUT you start with a charged battery so you only need to top up for the 5th day as it lasted 4 days and the panel is charging for 5 days. You need 22 Amp Hours and get 50 from the panels over 5 days.

Sounds like you would last 5 or 6 days on Wizards 80A panels. Alternatively get a 2nd battery or a generator.