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 1/26/2016 12:43 PM
 

About how long does it take to fully charge a 6 volt deep cycle battery completely discharged using a 6 volt
battery charger at 4 amps?

I thought 6 hours was sufficient but I was wrong. Any ideas? Thanks.

Happy RVing to you & yours
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 1/26/2016 2:35 PM
 
 Modified By RVA  on 1/26/2016 3:07:17 PM

A 4-amp charger, depending on the battery size, could take considerably longer than 6 hours to fully charge the battery, but by that time you should see some progress. Assuming the battery doesn't have a bad cell or an internal short, it may be too discharged for your charger to handle. Some home-style chargers require a certain residual battery voltage (4v) to activate the charging cycle. If your battery is discharged below that level, the charging cycle won't be triggered. A professional charger can handle these situations, so it might be worth your while to visit your local gas station. Good luck. - Dave

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 1/31/2016 9:27 PM
 

Its also my recollection (but a fuzzy brain), that the older style chargers (without the fancy multiple charging modes) don't really care about the state of charge and will try and pump the 4 A into the battery anayway.

I have both types, and the older style charger often gets things working again, when my newer style charger says "insufficient voltage." Sometimes, the heavy "jolt" from a larger charger is enough to get the battery charging again--so Dave's suggestion is very worthwhile.

For your info:

Many of the 6-volt deep cycle batteries used in motorhomes and "fivers" have amp-hour capacities of about 200AH.

So, using your 4A charger could easily take as long as 25 hours or longer to reach a full charge!

Good luck with your battery ...


Cheers and happy travels, Mike www.backroadtravelers.com
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