suethedriver Posted February 28, 2021 Share Posted February 28, 2021 I checked my panel & controller today in my motorhome & it said leisure battery very poor , nothing lit up on solar controller box at all ! Has been fine all year through all weather previously . Took for mot last week and vehicle battery was flat too ! that has been fine too and regularly started and run . (1 x terminal was removed briefly before jump starting ) Could these issues be connected ? Anyway i have checked fuses in solar control box ( ok ) Wellsee WS MPPT30 Done a reset by removing fuse in leisure batt line & to solar box leaving for 10 mins then reconnecting ( panel covered on roof !) still not working. On hook up now and battery is going up now 12.1 v currently. The leisure batt fuse bit is very hot and batt is making a bit of a hissing sound . Any ideas please what else i can try . Don`t have a manual for solar at all ( van bought used last feb ) Thanks. Link to comment Share on other sites More sharing options...
Charles Posted February 28, 2021 Share Posted February 28, 2021 Have you got a multimeter? You could check to see if there is anything coming down from the solar panel. You should get well over 12v. Ours is 19v Link to comment Share on other sites More sharing options...
suethedriver Posted February 28, 2021 Author Share Posted February 28, 2021 I think my neighbour has one i will try that tomorrow . thanks Link to comment Share on other sites More sharing options...
colin Posted February 28, 2021 Share Posted February 28, 2021 It sounds like the leisure battery is beyond help and you need to take it off charge straight away. Not sure about the solar, but looks like at least one new battery is needed. Link to comment Share on other sites More sharing options...
Keithl Posted February 28, 2021 Share Posted February 28, 2021 If the battery is hissing it is seriously gassing off and VERY DANGEROUS! The gas released is Hydrogen and highly flammable, be VERY careful not to create any sparks anywhere near it. Open all doors and windows and allow the gas to escape. Keith. Link to comment Share on other sites More sharing options...
suethedriver Posted February 28, 2021 Author Share Posted February 28, 2021 Thankyou . I have taken it off ehu now & left locker open just incase there is an issue with it. Seems odd that there is a problem with charger & battery + vehicle battery suddenly flat too ! ... looks liek a new battery i reckon :( Link to comment Share on other sites More sharing options...
mikefitz Posted March 4, 2021 Share Posted March 4, 2021 The charge controller you have, the Wellsee WS MPPT30, is a poor design and not a MPPT controller, its a badly designed PWM controller. Its quite possible this controller incorrectly charged your battery and caused the issues you are having. Mike Link to comment Share on other sites More sharing options...
rajohno Posted March 4, 2021 Share Posted March 4, 2021 Sounds like an internal plate has collapsed in the leisure battery, mine did something similar in 2019 while camping, make sure the gas has dissipated before disturbing any connections (might smell like rotten eggs) The vehicle battery may have been dragged down by the failing leisure battery, but this depends on how the controller distributes the current or it may have naturally discharged as all the charge current has been directed towards the failing leisure battery, making the situation even worse. once you have removed the failed battery, wash out the battery box with a mix of water and diluted white vinegar to neutralise any acidic remains especially exposed metal surfaces. Link to comment Share on other sites More sharing options...
Ocsid Posted March 4, 2021 Share Posted March 4, 2021 rajohno - 2021-03-04 9:29 AM Sounds like an internal plate has collapsed in the leisure battery, mine did something similar in 2019 while camping, make sure the gas has dissipated before disturbing any connections (might smell like rotten eggs) The vehicle battery may have been dragged down by the failing leisure battery, but this depends on how the controller distributes the current or it may have naturally discharged as all the charge current has been directed towards the failing leisure battery, making the situation even worse. once you have removed the failed battery, wash out the battery box with a mix of water and diluted white vinegar to neutralise any acidic remains especially exposed metal surfaces. Exactly the route my mind was going down after reading the OP. A cell falling over is so typical a failure mode, one sometimes with following serious consequences to charging systems. Link to comment Share on other sites More sharing options...
BruceM Posted March 4, 2021 Share Posted March 4, 2021 rajohno - 2021-03-04 9:29 AM wash out the battery box with a mix of water and diluted white vinegar to neutralise any acidic remains especially exposed metal surfaces. White vinegar is acidic so probably better to use something mildly alkaline like diluted baking soda? Link to comment Share on other sites More sharing options...
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