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15-11-2014, 02:40
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#1
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Eternal Member
Join Date: Jul 2011
Location: Australia
Boat: Lagoon 400
Posts: 3,650
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disconnecting battery charging
Hi,
A quick question, I want to check the battery fluid level so I need to disconnect the solar and shore power charge for a few hours. Whats the best practice?
Just remove the main negative battery terminal?
Thanks,
Monte
Edit : on second thought id like to discharge the batteries a bit first I guess? So whats the best way to disconnect solar charging, remove the fuse? its a victron 150/85 MPPT controller...
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15-11-2014, 04:05
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#2
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Moderator Emeritus
Join Date: Oct 2009
Location: Manchester, UK
Boat: Beneteau 473
Posts: 5,589
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Re: disconnecting battery charging
I trip the breaker I have between the controller and the battery, but to be honest, I don t know if this best practice.
Or check the battery at night.
__________________
Nigel
Beneteau 473
Manchester, UK
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15-11-2014, 05:04
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#3
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Registered User
Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 9,626
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Re: disconnecting battery charging
Best bet is to cut the circuit before the controller....ie disconnect the solar from the regulator. The regulators really don't like not having anyplace to put the current supplied by the solar.
Sent from my iPhone using Cruisers Sailing Forum
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15-11-2014, 05:16
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#4
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S/V rubber ducky
Join Date: Jul 2007
Location: heading "south"
Boat: Hunter 410
Posts: 20,362
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Re: disconnecting battery charging
Quote:
Originally Posted by monte
A quick question, I want to check the battery fluid level so I need to disconnect the solar and shore power charge for a few hours.
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why? I check the water level with the batteries connected
__________________
Don't ask a bunch of unknown forum people if it is OK to do something on YOUR boat. It is your boat, do what you want!
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15-11-2014, 05:55
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#5
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Registered User
Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 9,626
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Re: disconnecting battery charging
Quote:
Originally Posted by sailorboy1
why? I check the water level with the batteries connected
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I was going to ask the same thing but probably don't want to know.
Sent from my iPhone using Cruisers Sailing Forum
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15-11-2014, 06:10
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#6
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Senior Cruiser
Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 49,082
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Re: disconnecting battery charging
There’s no real need to turn off all charging sources to check electrolyte levels.
Preferably, water your batteries after giving them a full charge, as watering before charging may result in electrolyte overflow.
Before you check the water levels, clean any dirt or debris from the top of the battery and around the battery terminals.
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"
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15-11-2014, 12:58
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#7
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Moderator Emeritus
Join Date: Oct 2009
Location: Manchester, UK
Boat: Beneteau 473
Posts: 5,589
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Re: disconnecting battery charging
Usually a good idea to check the SG at the same time, that's why I disconnect the charge sources and leave it a couple of hours.
__________________
Nigel
Beneteau 473
Manchester, UK
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15-11-2014, 14:34
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#8
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Eternal Member
Join Date: Jul 2011
Location: Australia
Boat: Lagoon 400
Posts: 3,650
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Re: disconnecting battery charging
Yes Nigel, thats what I normally do as well, and thanks guys, I disconnected the solar by removing the fuse.
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