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 Catalina/Capri 25/250 Sailor's Forums
 General Sailing Forum
 "Smart" Battery Chargers?
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Jeff McK
Captain

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USA
389 Posts

Initially Posted - 11/08/2004 :  19:52:26  Show Profile
I'm getting ready to pull my battery for the winter, and would appreciate some advice for maintaining it during the off-season.

I've heard about using "smart battery chargers" to keep the cells in peak condition without a risk of boil-over or cooking the cells. Unfortunately, I could not find anything in the archives with this title, and a web search has produced more info than I can sort out.

Does anyone have advice as to a preferred brand & specifications I should look for in a unit?

Still in the water...

Jeff McK
Formerly Event Horizon (sold)
C250 WK #805

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kbq
1st Mate

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USA
99 Posts

Response Posted - 11/08/2004 :  20:18:15  Show Profile
Jeff -

A low amp charger (1 to 1.5 amps) can be left connected full time. Check the Schumacher SE112S from Kragen - $27.00. Peak makes "smart chargers"; see the Peak PKC086 for about $30 at Kragen. West Marine has a couple of different models - check [url="http://www.westmarine.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&langId=-1&catalogId=10001&productId=145312&catalogId=10001&classNum=683&subdeptNum=544&storeNum=9"]WM Chargers[/url] .

Good luck!


Kevin
"wait for me"
250wk

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ClamBeach
Master Marine Consultant

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3072 Posts

Response Posted - 11/08/2004 :  20:29:07  Show Profile
I use 1.5 amp 'permanent mount' (it has a mounting bracket) "Marine Smart Charger" from Schumacher... About $25 at Kragen. Use it year round with my shorepower connection.
No complaints over the last 1-1/2 years of service.

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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts

Response Posted - 11/08/2004 :  22:15:19  Show Profile
I hook mine up to a little Guest 2606 multi-stage portable unit and leave it there all winter. It's the battery that came with the boat four years ago--no idea how old it is, but it's been perfect each year.

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 11/09/2004 :  07:23:34  Show Profile  Visit Frank Hopper's Homepage
Mine stay hooked up to my 2 battery Guest charger at all times. The charger is connected to the Guest battery switch, it is handier than trying to connect it to the batteries themselves.

Edited by - Frank Hopper on 11/09/2004 07:24:53
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Jeff McK
Captain

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USA
389 Posts

Response Posted - 11/10/2004 :  13:20:38  Show Profile
Frank,

Where in your boat is that photo taken? I'm guessing back under the cockpit seating in the aft berth somewhere.

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 11/10/2004 :  14:19:38  Show Profile  Visit Frank Hopper's Homepage
I have a 25, it is in the port sail locker. Above it is the back of the power wall so the wires simply connect to the feeds of the battery switch. I wanted it outside of the cabin because of the heat it generates.

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existentialsailor
Master Marine Consultant

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USA
1180 Posts

Response Posted - 11/10/2004 :  17:14:38  Show Profile
If I may be so bold to ask, why is it necessary to pull the battery out?

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oldsalt
Admiral

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USA
578 Posts

Response Posted - 11/10/2004 :  17:20:29  Show Profile
Left unchargerd for long periods, batteries will self discharge and the plates will become sulfated, ruining the battery. It's also harmful to allow a battery to freeze up which it might do when the charge is low since the acid solution becomes less concentrated due to discharge.

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Lightnup
Master Marine Consultant

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USA
1016 Posts

Response Posted - 11/10/2004 :  17:53:07  Show Profile
Don't they make a mini-solar-panel smart charger that would allow one to leave the battery on the boat?

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 11/10/2004 :  20:24:18  Show Profile  Visit Frank Hopper's Homepage
I leave mine in and charging all winter. That is what a smart charger should be able to do for you. I am in my boat on the hard at least once a week.

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Jeff McK
Captain

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USA
389 Posts

Response Posted - 11/10/2004 :  21:23:46  Show Profile
I'm planning on pulling it mostly for the reason that I have not had time to set up a waterproof shoreline power connection & onboard charging system yet and don't want to come back to a dead battery in the spring. (Chesapeake Bay)

Lightnup: I like the concept of a solar charger, but recall something a while back about potentially overcharging the cells with a solar powered unit.

I'll start looking at them, but if all you 12 volt experts out there have advice or warnings on solar panels I'd appreciate hearing them.

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