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Old 20-05-2011, 18:35   #1
Paul
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Default Your thoughts on this..

Just been looking at this for the van..

http://cgi.ebay.co.uk/N05HN-4W-Solar...05450022218377

Anyone used/know anything about them?
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Old 20-05-2011, 18:47   #2
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I THINK RICK ( SOLARMAN 216 ) IS YOUR BEST OPTION FOR ADVICE /COMMENTS
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Old 20-05-2011, 18:51   #3
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we've got one on the boat and I think that's 4w , works a treat
Any higher wattage and I think you need a regulator of some sort , I think, maybe
Any way it seems tidy
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Old 20-05-2011, 19:02   #4
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Thought that about over 4w, thinking now of just getting one for the Mav for winter, only a short drive to & from work with everything on the battery gets a battering..
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Old 20-05-2011, 20:23   #5
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Quote:
Originally Posted by Paul View Post
Thought that about over 4w, thinking now of just getting one for the Mav for winter, only a short drive to & from work with everything on the battery gets a battering..
I would be surprised if an item with such a low output would make any difference for your purposes, especially during winter.
4w is probably the maximum in ideal conditions, we have an 80w to charge our batteries down on the allotment and it struggles to maintain a decent charge
(granted it gets no other charge) but even so such a law output would be of minimal benefit.
Last thing the output requirement for a regulater is much higher than 4w (somebody on here will be more savvy on this) but i think it`s round about the 80w mark.
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Old 20-05-2011, 21:21   #6
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i have one very similar, for the caravan when not on electric, used the caravan for ....i think it was 9 days, on a fully charged 110 amp battey, using normal things while away, including a 12 volt tv, these solar panels are ideal for topping up the battery, but be aware they are not designed to fully charge a flat battery. i think mine was 18v open circuit with a charge rate of about 3/4 amp trickle charge.
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Old 20-05-2011, 21:39   #7
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Depends entirely on the application, 4w is never going to overcharge a car sized battery, but if used to say charge an alarm battery of 1.2 Ah then yes a regulator would be required, also worth noting that if the sun cannot be seen they do absolutely nothing, THEY DO NOT WORK ON DAYLIGHT, a general rule of thumb is if you can see a distinct shadow, they start to work, daylight is nothing but hype, I have been installing PV and hot water systems for 20 plus years, another point re the briefcase mentioned, they are not weather proof, I tried one out for a test and it failed after 6 months, they will of course work behind a window but the day will be shortened due to shadowing , if anyone wants to know anything about solar just ask, regards Rick
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Old 20-05-2011, 23:19   #8
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a few interesting items on here:

http://www.maplin.co.uk/12v-4w-solar-briefcase-348061
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Old 21-05-2011, 10:50   #9
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Trickle charger and it look mucho cheap to me for such a lot of cells....
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Old 21-05-2011, 11:21   #10
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http://www.maplin.co.uk/13w-solar-briefcase-99760

This is a good deal, with regulater & loads of leads
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Old 21-05-2011, 12:15   #11
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Quote:
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http://www.maplin.co.uk/13w-solar-briefcase-99760

This is a good deal, with regulater & loads of leads
it certainly does
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Old 21-05-2011, 20:12   #12
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well i'm close to buying an 80W for caravan, several members
of my rally club have them though say dont buy less than a 60W.

car should be able to recharge battery on journey, as alternator
puts out i gather around 75A. so even with lights on be ok.
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Old 21-05-2011, 20:14   #13
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Quote:
Originally Posted by kitchenman View Post
http://www.maplin.co.uk/13w-solar-briefcase-99760

This is a good deal, with regulater & loads of leads
Was looking at that in Maplin's in Blackpool the other week, it's what as had me looking on ebay..
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Old 21-05-2011, 20:15   #14
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it will probably struggle. youll need a really sunny day
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Old 21-05-2011, 20:15   #15
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THANX Everyone for all the info about this by the way..
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