Batteries

Hamsterberg · Feb 12, 2011

Ok done a search and not found what im looking for.
Just wondering if anyone has linked two batteriers together, when i had a boat i had four linked togerther still 12v and all got charged as one, i understand having a seperate battery for starting and another for winch etc, but was wondering other than if they went flat you cant start the vehicle was there any other reason not to link them, as long as engine is running when winching, surely they shouldnt go flat.

By the way The Kings Speach is a good film

Langers · Feb 12, 2011

Hamsterberg said:
Ok done a search and not found what im looking for.
Just wondering if anyone has linked two batteriers together, when i had a boat i had four linked togerther still 12v and all got charged as one, i understand having a seperate battery for starting and another for winch etc, but was wondering other than if they went flat you cant start the vehicle was there any other reason not to link them, as long as engine is running when winching, surely they shouldnt go flat.
By the way The Kings Speach is a good film

What you do is you isolate the 2nd battery with a switch, so that when the engine is running you are charging both batteries - but when you need to do some winching etc, you just flip the switch and isolate the 2nd battery. This way you don't risk flattening your main starting battery. When you're done winching, you just flip the switch back again and the alternator will charge both batteries simultaneously

And no, if you are drawing enough current from the batteries (for example when winching which uses a massive amount of power), the alternator won't be able to keep up with the demand and the battery/batteries will eventually become flat.

Griffdowg · Feb 12, 2011

worth isolating overnight or for long periods also. power all your accessories/winch off 1 batt not a mix, that way 1 is always good.

its like a manual split charge!

Langers · Feb 13, 2011

You can get more complicated and automatic systems but I reckon for the cost they're not always worth it.

This is what I use, works perfectly for my usage

Battery Isolator Cut Off Key Switch FREE POST on eBay (end time 19-Feb-11 09:17:34 GMT)

Hamsterberg · Feb 13, 2011

Thanks guys, like the idea of manual split charger less to go wrong.
Can understand why more people dont do it like that, all the threads on this are about split chargers when you dont really need one, happy days

Griffdowg · Feb 13, 2011

Hamsterberg said:
Thanks guys, like the idea of manual split charger less to go wrong.
Can understand why more people dont do it like that, all the threads on this are about split chargers when you dont really need one, happy days

when you eventually forget and cant start your motor because you left your spots on in the daytime... you will realise

G

Hamsterberg · Feb 13, 2011

Griffdowg said:
when you eventually forget and cant start your motor because you left your spots on in the daytime... you will realise

G

Think i might notice my spots on

Batteries

Hamsterberg

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Langers

Well-Known Member

Griffdowg

New Member

Langers

Well-Known Member

Hamsterberg

Well-Known Member

Griffdowg

New Member

Hamsterberg

Well-Known Member

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