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battery charger question
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my neighbor has the pinnacle sl600 stair lift and the charger got wet and seems to have lost the ability to keep the batteries charged. i found he had a guy put a new connector on it and of course wire that wrong so then the batteries ran down to below 4 vdc. anyway o had him get new batteries and i installed them but i think the charger need to be replaced as well. can any tell me what size charger they use for the 2 12 volt dc batteries and the amps they put out. and the names of there chargers? i bet i can ebay one but it has to be able to recharge them fast after use and be able to maintain them when not being used and parked.
the mobility scooter website said they can get me one but they want 200$ for one. heck they are not bigger than a laptop charger but for being 24 vdc and maybe 1 amp i think a 2 amp may be better. so maybe some here can enlighten me to there chargers name or models and the output they are for 24 vdc and 8 to 9 AH batteries. thanks
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Most people on here are UK based, Harmer don’t tend to sell here any more.
Handbook is available on the Harmer site
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thanks that does not tell me anything outside of the normal care. can anyone tell me why a 24 volt system would have 32 volt charger? car chargers for 12 volt rarely go part 15 volts so i’m a bit confused as to why this one had a 32vdc charger on a 24 vdc system. so does anyone have an answer for that? i did find out by taking it apart that they had the charger connected in the wrong polarity so i fixed that and had to install new batteries because it ran them down so far the charger could not recover them even at that 32 vdc output. see photo of the charger on it now this is not the oem charger so i want to get him the proper charger but like i said this one is what came with it and i’m leaning on it not being the correct output for the system. can anyone clarify based on there 24 volt lift charging systems? thanks
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32v Would be a normal initial supply voltage for a 24Vdc system. SLA batteries bulk charge at 14.4Vdc hence at least 28.8Vdc would be a required minimum, float charge runs at 13.7Vdc per battery once full charge has been reached.
I have not worked on the Harmer lift but from what I posted I deducted that the charger has multiple LEDs which display charge state and issues.
Some lifts use an intelligent charger connected directly to the batteries, other models have a dumb charger which supplies a certain power level which the PCB then manages to charge batteries at the required levels. From the manual I would suspect that the Harmer requires its own intelligent charger. -
say thanks i guess that make prefect sence then. this one sends the charger power to the circuit board so the circuit board then must be the control for the battery charge that they get. so i will look for a 32 vdc charger. this one has a single led and i can’t tell what the color is for either charge or maintain the charger looks like a computer type charger. i did post a photo of the charger with the data on the charger. but because your telling me based on your experience that the circuit board is the control point then i will look for a 32 vdc charger for him then.
i have the acorn lift and it has 2 batteries the same as the pinnacle but my charge is a 15 vdc charger so my charger must go to the board also but then that gets split and sends the charge to each battery and on my acorn the batteries must be connected to the board each and not in series.
thanks
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Older Acorns are just 15Vac lemac transformers which are converted to dc onboard
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yes your correct i red that wrong my acorn is 15vac anyway i will see if i can ebay a 32vdc charger and not the 24 vdc charger as like your saying the circuit board controls the battery charge. will it make any difference to the output amps? being the one he has not is 1.212 amps and 40 watt output. he has 9 AH batteries in it now but that should not make much difference as the AH is for the available power going to the motor correct? but maybe at least a 2 amp charger? thanks
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Medical gear with touchable metal is a deep subject involving AC Ripples. Too complex for text. Requires instrumentation galore.
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Instrumentatipn required.
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