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Old 17-01-2019, 12:25   #1
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Battery’s

I, have 2 12 volt agm battery’s paralleled together for my house bank and a separate battery isolated for starting.My battery charger has 2 leads one going to the 2 battery’s together the other going to the starting battery.
The charger has stopped charging the 2 house battery’s .
Is this a bad set up or has my battery charger failed.It is 5 yrs old.
Thank you
Dave
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Old 17-01-2019, 12:51   #2
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Re: Battery’s

Nothing wrong with that configuration. Before everyone starts the inevitable guessing games, let's clarify - you indicate the charger has stopped charging only the 2bank of batteries implies you think it is still charging your start battery. Is that correct?

Parenthetically, it's "batteries", not the possessive "battery's"
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Old 17-01-2019, 12:54   #3
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Re: Battery’s

Check all the connections. Sand any corrosion off with fine sandpaper. Check the shore connections too. See if there is a reset button on the charger. Advise here re make and model of the charger. Also check all your battery cable connections.
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Old 17-01-2019, 13:04   #4
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Re: Battery’s

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Originally Posted by rgleason View Post
Check all the connections. Sand any corrosion off with fine sandpaper. Check the shore connections too. See if there is a reset button on the charger. Advise here re make and model of the charger. Also check all your battery cable connections.

Check the voltage at the end of the charging cables, too.
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Old 17-01-2019, 16:34   #5
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Re: Battery’s

What charger? Is it capable of charging in that configuration? Most shouldn’t be and installation instructions say not to. Should have one lead for each 12v and a combiner for the separate starter or a charger designed for 3 banks. You may have burnt out the lead to the house bank from the charger constantly bulk charging.
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Old 17-01-2019, 17:23   #6
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Re: Battery’s

Quote:
Originally Posted by S/V Illusion View Post
Parenthetically, it's "batteries", not the possessive "battery's"
...of course, and the plural of "dinghy" is "dinghies", not "dinghy's", and the plural of "marina" is "marinas", not "marina's"; however, the power of the grocer's apostrophe is strong here on CF my friend.
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Old 17-01-2019, 19:56   #7
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Re: Battery’s

swap the wires and see if the house charges instead?.

if it is a 3 bank charger try using the 3rd unused lead.
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Old 18-01-2019, 14:17   #8
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Re: Battery’s

Thanks all I believe RBK May be right. The starting battery is fine . Running the engine will bring the house bank up but slowly discharges . I, will replace charger with a 3 output charger.
Thank you for the help
Dave
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Old 18-01-2019, 14:42   #9
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Re: Battery’s

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Thanks all I believe RBK May be right. The starting battery is fine . Running the engine will bring the house bank up but slowly discharges . I, will replace charger with a 3 output charger.
Thank you for the help
Dave
Check your outputs first before going and purchasing a new charger. Disconnect the starter battery and leave the house connected and check output for that lead then switch. If the starter battery is bad and you have a semi-intelligent charger it maybe trying to dump everything its got into the starter, who knows without testing. If your charger is good you can just purchase a DC to DC combiner and hook your 2 bank charger up to the house bank and jump the starter with the combiner (simply put). That might save you a couple hundred at the very least. It really all depends on the charger though, if you tell us what you have that would really help in diagnosing.
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