2nd battery question....
I think my number two battery has died. Its is flat as a tack but i cant get a charge to go through it. I suspect its in need of replacing.
Both batteries are cranking batteries connected through an isolating switch that can select #1; #2; both; or off.
Down the track i want to introduce a deep cell battery for my house electronics and one of those fancy switches that puts the charge straight back into the cranking battery and then switches the charge to the house battery.
If i introduce the deep cell battery now, without changing the switch, i am just limiting myself to one battery, arent i? The deep cell battery wont be of any benefit because it wont have the cranking power to start the motor if the cranking battery fails for any reason...
I suspect i know the answer already... putting in a deep cell battery without the proper switch isnt going to give me a back up cranking solution, is it?
Fish! HARD!
Rob H
Posts: 5744
Date Joined: 18/01/12
depends on the outboard, and
depends on the outboard, and the battery.
Unless you have a massive outboard or inboard (which I think you dont) it will start easily on a reasonable size deep cycle, and even if not it will when paralleled with the flat one.
The "proper switch" Im guessing is a VSR, voltage sensitive relay but in your situation Id do what you are thinking.
From memory you have a 90 or 115, any reasonable size deep cycle or combined will start it and probably be better for it than a VSR given that most (every one I know of) VSR just parallels with the start battery in a manner not generally recommended for charging disimilar batteries.
I prefer to manage my batteries myself but thats personal choice.
With your present battery, if you are using a smart charger like a ctek it may not charge it if dead flat, in which case try paralleling it til the charger gets going (senses over about 9 volts) then see how it recovers.
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
shortfuse
Posts: 211
Date Joined: 02/01/12
Go down and see the people
Go down and see the people at goodchilds they have the knowledge, battery technology has come a long way in the past few years. I think you will find they have something that fills both deep cycle and cranking characteristics. in one battery now.
randall df223
Posts: 6454
Date Joined: 08/08/11
Cheers.Parallel with another
Cheers.
Parallel with another battery. positive to positive, negative to negative?
Fish! HARD!
Rob H
Posts: 5744
Date Joined: 18/01/12
yes
yes, thats what happens when you switch your battery switch to "both" and also when the VSR activates.
Series is positive to negative and gives 24 volts.
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
randall df223
Posts: 6454
Date Joined: 08/08/11
Yep... had to dig deep back
Yep... had to dig deep back in tbe memory banks to about yr 10 for that one....
Fish! HARD!
JohnF
Posts: 2836
Date Joined: 07/07/10
I looked at the fancy
I looked at the fancy switches, and agree with Rob, I like to manage the batteries myself with a 1,2, both and off switch.
The simple rule is "never use both unless your in the shit". Batteries hate being joined together in parallel.
Boston Whaler 235 Conquest......getting the flogging it was built for.
randall df223
Posts: 6454
Date Joined: 08/08/11
I never do use them in both.
I never do use them in both. I alternate days between #1 and #2.
I think fom the info i have through rob and others on here, i reckon if need be i can replace the dead cranking battery with a deep cell battery and wire all the house electrics to the deep cell battery. Then i can select #1 to crank the motor, run the motor off #1 for a while to put a charge back into it and then switch over to #2 to top up the deep cell battery. If i include a simple on / off isolator switch between the deep cell battery and the house electrics, i can switch the whole lot off when finished to prevent leakage.
Until i get the fancy pants switch, i can always whack a charger on to charge everything between uses.
If my understanding is wrong, please tell me!
Cheers everyone.
Fish! HARD!
Rob H
Posts: 5744
Date Joined: 18/01/12
your being a single outboard,
your being a single outboard, all you need is the standard dual battery setup with the house supply drawing from the outboardside of the isolator which is probably exactly what you have already.
Dont wire it to the deep cycle or you'll need to fit some sort of isloator which you dont need.
Just fit a breaker or fuse.
Give a man a mask, and he'll show you his true face...
The older you get the more you realize that no one has a f++king clue what they're doing.
Everyone's just winging it.
randall df223
Posts: 6454
Date Joined: 08/08/11
I do have a spare isolator
I do have a spare isolator as when i bought the boat it only had a single battery with simple on / off isolator. I introduced the second battery and dual switch. So the old switch is still lying around somewhere
Fish! HARD!