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-   -   Schumacher XCS15 overcharging ? (http://www.sailnet.com/forums/electrical-systems/99239-schumacher-xcs15-overcharging.html)

pfile 05-06-2013 09:50 PM

Schumacher XCS15 overcharging ?
 
Hi,

I usually place my battery switch to both and connect the Schumacher for charging about once every 2 weeks during winter.

I noticed that my wet deep cycle marine battery banks were spitting and boiling whilst charging with my Schumacher XCS15 over the winter so I took my multimeter and read over 15.5 volts going into the batteries.

I usually place my battery switch to both and connect the Schumacher for charging about once every 2 weeks during winter.

Is this okay, it seems a little high to me ?

Has this charger ruined my battery banks?


Batteries:
DieHard Marine Deep Cycle/RV Battery, Group Size 24M
CCA (0F): 500
Reserve Capacity (RC): 135 min.
Amp Hours at 20 Hour Rate: 80
DieHard Marine Starting Battery, Group Size 24MS
CCA (0F): 500
Reserve Capacity (RC): 90 min.
DieHard Marine Deep Cycle/RV Battery, Group Size 29HM
CCA (0F): 675
Reserve Capacity (RC): 200 min.
Amp Hours at 20 Hour Rate: 115

Thanks

mitiempo 05-08-2013 02:03 AM

Re: Schumacher XCS15 overcharging ?
 
Yes it is overcharging!

Damage to the batteries will depend on how long the charger was at such a high level. Schumacher chargers are prone to this - Maine Sail has posted about a Schumacher charger that has ruined batteries on one of his customer's boats. Best to get a good charger and throw it away. As far as the batteries wait and see if they are ok.

Bulk charging voltage for flooded should be about 14.4 with a float of 13.5.

pfile 05-08-2013 07:52 AM

Re: Schumacher XCS15 overcharging ?
 
Hi Brian,

Thanks for the response. I'm a little shocked that a consumer product I've just purchased could be so blatantly crap. Going to see if I can get my money back.

There is a Ray Jefferson charger installed on the boat but it looks to be in pretty bad shape. I thought that purchasing this portable modern marine charger for winter top ups would be healthier for my battery banks.

I hardly know where to start with installing a decent charging system and perhaps an echo charger. Pro Mariner seem to be well recommended and Blue sea for the combiner.

Thanks again

KarlP 05-10-2013 02:05 AM

Re: Schumacher XCS15 overcharging ?
 
Is that one of those fully automatic chargers that also "know" when the battery needs to be equalized? Equalization is simply charging a few volts high for a few hours...

Maine Sail 05-10-2013 05:59 AM

Re: Schumacher XCS15 overcharging ?
 
Quote:

Originally Posted by KarlP (Post 1028026)
Is that one of those fully automatic chargers that also "know" when the battery needs to be equalized? Equalization is simply charging a few volts high for a few hours...


"Fully Automatic", "Smart", "Advanced CHarging Technology" all fancy terms marketers slap on products that are often far from accurate descriptions..

A number of these Schumacher chargers are grossly cheapened Wal*Mart grade products that can very easily RUIN expensive batteries.. GEL batteries for example must not be charged at over 14.1V. I had a customer lose a very, very expensive GEL bank that was getting over 15V on the GEL setting. Seeing as NO GEL BATTERY CAN BE EQUALIZED then why have I had two Schumacher chargers handed to me by customers that chronically over charge on both the AGM, WET & GEL settings?

On one of them I had the "Wal*Mart" receipt, returned for the customer, and the replacement did exactly the same thing, destroy GEL batteries by pushing the voltage well over 15V.

Schumachers response "The charger is smart and working as it should.". BTW tech support consisted of a twenty something who had no clue what a GEL battery needs to be charged at, no clue as to how the charger actually operates, no clue that GEL batteries and most AGM's can't be equalized or how & why, if it is so smart, why it decides 15+ volts is okay on the GEL setting which should be limited to 14.1V to 14.2V max..? All they could really say is "Sir the charger is "smart" and is operating as it should."... If it was then this is NOT A "SMART" charger.....

The tech support person knew even less about batteries than he did his own product other than to read from his "cook book" and give me predetermined responses. I guess it was smart enough to open my customers wallet, drain $60.00 from it, then molest & beat to death $1500.00 worth of brand new GEL batteries from him...:hothead

I have been cautioning folks about these chargers for years. Buyer beware these are NOT "smart"....


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