Battery flat despite 80 solar panel

Discussion in 'Hymer' started by 100kilo, May 13, 2012.

  1. 100kilo

    100kilo Read Only Funster

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    Was I naive to expect my solar panel - it's 120 watt - to maintain my engine battery through the winter?

    It was spent when I tried it after a 3 month lay up and now, with only 5,000 miles on the clock I am biting the bullet to get it tested and find out if it is destined for the knackers yard. :Doh:
     
  2. happypre65

    happypre65 Funster

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    solar panel

    Hi,i have a solar panel and for a long time now it has been a godsend and with no problems at all,i should get it checked out,good investment,regards harvey,:thumb:
     
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  3. 656

    656 Read Only Funster

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    If your Solar Panel charges your hab battery, you would need a Battery Master to charge your engine battery when the hab battery is fully charged!
     
  4. freelanderuk

    freelanderuk Read Only Funster

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    how i it connected to the starter battery , my 100watt is connected to my leisure battery and then i have a battery master which diverts the excess power to the starter battery , never had a flat starter while fitted
     
  5. slobadoberbob

    slobadoberbob Read Only Funster

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    use a battery master my self

    I use a battery master myself.. good item for the money.. keeps the engine battery topped up.

    Bob
     
  6. Techno

    Techno Funster Life Member

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  7. slobadoberbob

    slobadoberbob Read Only Funster

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    the battery master takes power from the hab

    Unless the wiring for the solar allows for the habitation and engine chassis which I doubt many have as they have say two tab batteries and one engine then the engine will not get enough power... a solar panel would have to be mega to keep 3 batteries topped up.

    The battery master takes off excess power from the tab batteries to the engine at a very low rate.. just using the excess..

    While I am on EHU the Sterling Pro-Combi Charge and inverter charges the tab batteries (2 x 100 amps) and then tops of the 85 amp hour engine battery... I cannot see why a solar cannot use it?

    Eddie (VanBitz)?????? whats the answer please


    Bob
     
  8. Techno

    Techno Funster Life Member

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    Eddies battery master does not take off excess charge from the hab battery. It is not designed to work like that at all.
    What it does is transfer charge (1 amp max) from hab to cab whenever it senses that the cab is half a volt lower than the hab.

    The CSB2 transfers excess solar charge to the cab once the hab reaches 13.6 volts and then sends up to 4 amps to the cab until the hab drops to 12.6 volts
     
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  9. Techno

    Techno Funster Life Member

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  10. JeanLuc

    JeanLuc Funster

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    Since you have posted this in the Hymer forum, I presume you have a Hymer. Provided your solar panel is connected to a Schaudt LRS1218 solar regulator (or its predecessor, the LRS1214) which in turn, is connected to the Electrobloc with the supplied cables, the starter battery will be charged. Leisure batteries take priority then the starter battery is float charged.
    If you have an alternative (non-Schaudt) regulator*, then the starter battery will not be charged and you will need some alternative device as suggested by earlier posters. Or swap your regulator.
    If you have a Schaudt regulator and the starter battery is not being charged, then either you have a fault, or possibly the starter battery fly lead between LRS1218 and EBL has become disconnected (I pulled mine out to do some work and forgot to plug it back in again).

    *With some EBLs it is possible to use an alternative dual battery regulator such as the Morningstar SunSaver Duo.
     
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  11. steevie

    steevie Funster

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    If there is no drain on the battery, then it takes little power to keep it topped up. I have a seperate 20w solar panel connected to the engine battery, and manages more than fine to keep it good thru winter, as it takes about 6 months for a good battery to go completely flat on its own, when it then starts to sulphate on the plates, leading to it being useless for further charging. On many motorhomes, the engine battery and charging system are only connected together thru a relay on the ignition, so your solar charger is connected to your leisure batteries, but not your engine battery without the engine running. A split charge relay could be fitted to charge the engine battery and the liesure batteries, but power would not be taken back from from the engine battery, leaving it ready for when you want it. The battery master does just this, but with electronic control.
     
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  12. Geo

    Geo Trader - Funster

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    I thought i knew what i was doing and ive lost the will to live with the plethera of differing answers
    Allow me to answer in novice english:Rofl1:
    No you were not naive to expect your solar panel to charge your engine battery, it will do so with little effort, if it has been set up to do so, it my not be,:Doh:
    I recommend having the system checked out first, repaired if broke or altered to do what you quite rightly expected it to do
    Geo
     
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  13. slobadoberbob

    slobadoberbob Read Only Funster

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    and???

    and???

    Bob:Blush:
     
  14. CHRI$

    CHRI$ Funster

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    it might be an idea to wait till venus passes the sun before checking voltage output on your solar panel,as this is the main cause of low output on solar panel's at the moment but should be all over in about 8 days,but you would need to do all testing before december as we have planet x on its way,which will result in the end of the world around the 21st dec, so good luck:thumb:
     
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  15. Geo

    Geo Trader - Funster

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    And What, you no speaky engrish:Doh:
     
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  16. 1948

    1948 Read Only Funster

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    JeanLuc
    how can I tell that the solar regulator mounted in front of the electroblok is a Schaudt solar regulator
    Can you post a picture of yours
    thanks
     
  17. JeanLuc

    JeanLuc Funster

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    Images in the following links (mine was fitted by Stephen at Aire & Sun). Apologies - in my earlier post I added a superfluous 'S' in the designation - the regulator is an LR1218

    http://www.aireandsun.co.uk/index.php?item=73

    http://www.schaudt-gmbh.de./32.0.html
     
  18. pappajohn

    pappajohn Funster Life Member

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    But will only work if both engine AND leisure batteries are chassis earthed !
     
  19. JockandRita

    JockandRita Funster Life Member

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    And that is the route I went down too, having found out (the hard way), that whoever fitted the first solar panel, did not go through the Electroblok for starter battery charging. That was about 4 years ago, and we have not suffered a flat starter battery since. Great when in storage, or not on hook up.
    And when there isn't enough sunlight to recharge from both panels, ie during winter usage, that's where the Sterling B2B comes into it's own, when hook up isn't available.

    Fortunately, both battery banks are chassis earthed.

    Cheers,

    Jock.
     
  20. Kay

    Kay Read Only Funster

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    Is there any danger of overcharging the cab bat this way?

    Thanks
     
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