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Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems
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  #1  
Old 04-16-2012
Jim Sanders
 
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Battery Charger Rating

I am in the process of adding refrigeration to the boat. I have calculated that my new house battery bank needs to be 200 ah. So the unit runs properly , I will need to upgrade the batteries before starting up the unit.......if I defer upgrading my current charger(10 amp), and alternator (Atomic 4 / 30 amp), will I damage the batteries , or merly take longer to fully charge the house bank?
Thanks for any input!
Cheers
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Old 04-16-2012
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Re: Battery Charger Rating

It will just take longer to charge the bank. Of course if you have an older charger it may be damaging the batts already.

Also keep in mind that a 200Ah bank is really only 100 usable Ah's from a full charge, when sailing off the dock and not discharging beyond 50%.

If off cruising your bank gets even smaller because the alt will rarely get it much above 80% state of charge due to acceptance limiting. This means your 200 Ah bank is really only a 60Ah +/- bank when off cruising and charging from the alternator...

It would help to know what charger you have...
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Old 04-16-2012
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Re: Battery Charger Rating

Currently have a True Charge 10tb multi stage battery charger.
I have over built the "ice Box" , hoping to have my compresser cycling less often. Insulation cost so much less than batteries. The compressor is rated for a load of 4 amp hrs.
Cheers
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Old 04-16-2012
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Re: Battery Charger Rating

Quote:
Originally Posted by Jimmy E View Post
Currently have a True Charge 10tb multi stage battery charger.
I have over built the "ice Box" , hoping to have my compresser cycling less often. Insulation cost so much less than batteries. The compressor is rated for a load of 4 amp hrs.
Cheers
The 10TB will be fine provided it is installed per the instructions so it can move air across itself properly.
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Old 04-16-2012
Jim Sanders
 
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Re: Battery Charger Rating

Thanks for the info here, and among your numerous other posts
VERY HELPFUL
Cheers
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Old 04-16-2012
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Re: Battery Charger Rating

One more question from the electrically challenged ......any issue using the above mentioned charging unit to charge one 12 volt starting battery , while also charging two 6 volt house batteries?
Again ,Thanks
Cheers
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Re: Battery Charger Rating

Quote:
Originally Posted by Jimmy E View Post
Currently have a True Charge 10tb multi stage battery charger.
I have over built the "ice Box" , hoping to have my compresser cycling less often. Insulation cost so much less than batteries. The compressor is rated for a load of 4 amp hrs.
Cheers
No, Jimmy, no problem at all. The True Charge 10TB is a modern multi-stage charger designed to monitor and charge two separate battery banks simultaneously.

And, starter batteries don't require much charging at all...just a few amps now and then to keep 'em topped off.

Bill
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Old 04-16-2012
Jim Sanders
 
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Re: Battery Charger Rating

Again, Thanks Bill
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