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Solar battery chargers

Discussion in 'Electrics, Vacuum, Ignition and ECU' started by Daeths, Dec 27, 2012.

  1. Daeths

    Daeths Senior Member

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    I am doing a lot of short runs at the moment and looking at a solar charger to ensure the battery is always tiptop.

    This is the one I am looking at http://www.maplin.co.uk/solar-powered-12v-1.5w-battery-trickle-charger-98358

    My question is will this work if plugged into the front (ashtray) power socket on my 211. If it makes any difference, it is not a cigar lighter, but a power socket. I'm not sure if it needs to be a permanent live if that is the right phrase for this to work.

    Many thanks

    Adam
     
  2. whitenemesis

    whitenemesis Senior Member

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    Gut feeling says it will not make any appreciable contribution to charging the battery.

    And yes, the socket would need to be a permanent live.
     
  3. OP
    Daeths

    Daeths Senior Member

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    Cheers, happy to look for something with more oomph. Do you know if the 211 has a permanent live ?
     
  4. whitenemesis

    whitenemesis Senior Member

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    I think it is switchable simply by changing the fuse location. Have a look at the fuse map in the fuse box, end of dash, driver's side
     
  5. television

    television Always remembered RIP

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    To allow for the limited charging angle to get the max charge it would require a much bigger one, you have the losses through the glass a well, they are small but add up.

    That one will do nothing in the car
     
  6. whitenemesis

    whitenemesis Senior Member

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    The biggest loss would be through heat retention. PV efficiency reduces as heat increases.

    What do MB fit as OEM to cars?
     
  7. OP
    Daeths

    Daeths Senior Member

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  8. whitenemesis

    whitenemesis Senior Member

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    No, TBH get yourself a trickle charger, one of the CTEK range and be sure of getting the desired result..
     
  9. OP
    Daeths

    Daeths Senior Member

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    Have one of those, just wanted something I could leave when car not in use/airport car park.
     
  10. television

    television Always remembered RIP

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  11. whitenemesis

    whitenemesis Senior Member

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    A fully charged battery should be OK for 14 days.
     
  12. The Pan Man

    The Pan Man Senior Member

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    Daeths, My 2 lock ups have no power I have used 2 of these on each wired both positives and both negatives together (Series or paralell) which ever and never had a flat battery (car or motorcycle) longest time was just short of 3 MONTHS over the winter period. So I say that they work, for that price you could afford 2. IIRC they say that you can use the suckers and attatch them to your windows, never used them that way but caravan and boat owners swear by them. PS I own neither a boat or a caravan.
     
  13. television

    television Always remembered RIP

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    Thank you for your post, just to help clear up some unknown facts, what size are you using
     
  14. The Pan Man

    The Pan Man Senior Member

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    Malcolm, I have had them for a number of years. At a guess they are about 14 - 16" long and 5 - 6" wide and about 1/2" thick, as to power output I have no idea. They will not light a 12v bulb even in the middle of summer, but as stated above I have never had a flat battery since I have used them and the longest break was only a few days short of 3 months. Besides the motorcycles I have had both petrol and diesel Mercedes and BMW hooked up to them.
     
  15. syncropaddy

    syncropaddy Senior Member

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    I agree with the Panman. I have these solar things on my 300SE and a Syncro and will last at least 8 weeks between starts. They wont charge anything but they will slow down the rate of discharge quite a bit. I plug mine directly to the battery on the 300SE as the cigar lighter is ignition controlled.
     
    Last edited: Dec 28, 2012
  16. OP
    Daeths

    Daeths Senior Member

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    Ok I'm struggling. Handbook says the fuse boon is in the boot (it's and estate) nothing there looked drivers end of dash and can't see anything there. Can anyone help with my 211 fuse box so that I can see if I can have a permanent live on the power socket.

    Cheers and apologies for asking what is probably a really simple answer.
     
  17. television

    television Always remembered RIP

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    The trouble is that whitenimisis took that from another thread so it could be just hearsay, and he knows little about electrics.

    Now I can take a look but not easy as there are 5 different layouts for the fuse boxes, what year is your car and early or late that year
     
  18. whitenemesis

    whitenemesis Senior Member

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    My mistake, it's in the engine compartment fuse box

    Check this post by Troon

    http://forums.mercedesclub.org.uk/showpost.php?p=954356&postcount=5
     
  19. OP
    Daeths

    Daeths Senior Member

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    Many thx to all for your help. To assist others, on a 211 estate there are three fuse boxes.

    1. In the boot, next to the nav box
    2. At the end of the dashboard (drivers side) - open the door to see. There is a groove halfway up to insert a flat bladed screwdriver to prise of the trim - carefully.
    3. In the engine compartment, top left (looking from the front of the car)

    It is the engine compartment fuse box that hold the ashtray power socket fuse.

    As per the previously posted diagram, moved the fuse as shown (sideways half a groove) and I now have a permanent live on the ashtray power socket.

    Now to buy a solar charger !

    Many thanks again and I hope my idiots guide helps others - I work on the basis that I get it, everyone will :Oops:
     
  20. television

    television Always remembered RIP

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    I am pleased it all worked as via the link that Peter put up, so thank you for that and it saved much searching.
     

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