Charger wiring

gwood

Seaman Apprentice
Joined
May 10, 2010
Messages
34
I have 3 battery set up, 1 for engine & 2 for 12V troller motor, in parallel with selector switch & a 4/4 Guest charger installed when purchased boat in 2007.
I have just replaced 1 of the troller batteries for another Optima battery & have purchased a NOCO GENIUS GEN2 charger for the gel type Optima batteries.
My question is can I, space permitting, use the GEN2 to charge the Optima's & use the Guest for the starter flood battery but attaching both leads to use a an 8 amp charger? or will have to stick with the original plan and just replace the Guest with the GEN2 and wire the connections the same way. The 3 bank units were a little bit to big to fit in the original location.
 

Todd4

Petty Officer 2nd Class
Joined
Feb 11, 2012
Messages
111
Re: Charger wiring

I'd like to help you out, but I can't understand what you want to do.
I assume the Guest won't charge the 2 Trolling Motor Optimas? So you are going to uses the GEN2 for them and the Guest for the start battery.

What is the 8 AMP charger? Both leads????? Do you want to combine two of the charger leads from the GUEST to charge one start battery?? Hmmm? Maybe.

"3 banks units"?? Isn't the GUEST a 4-bank and the NOCO a (3?)-bank? I think I'm lost.

Todd
 
Joined
Feb 17, 2012
Messages
2,906
Re: Charger wiring

if you are asking how you hook a dual charger to a single battery that realy depends on the brand as some will auto switch, some will half switch (4+2), some you can use both set of leads on a single battery and some will not be happy and show a fault light on a single battery. Your will need the manual or to call the company tech surport.
Now some chargers have dip switchs to change each output between diffrent battery types and others can only be changed if all banks are the same so again look at all the manuals or call tech surport.
If you get stuck then send a link to the online manual so we can read up on your chargers
 

UncleWillie

Captain
Joined
Oct 18, 2011
Messages
3,995
Re: Charger wiring

I am confused Too! :confused:

I have 3 battery set up, 1 for engine & 2 for 12V troller motor, in parallel
2 Batteries in Parallel is one virtual battery, you have a Two Battery Setup.

with selector switch
What does the Switch, Switch?

& a 4/4 Guest charger installed when purchased boat in 2007.
Which model of Guest Charger?

I have just replaced 1 of the troller batteries for another Optima battery
Which OTHER Battery is an OPTIMA Battery and What battery is it EXACTLY?
What Make/Model is the Third Battery and where is it wired of the three?

& have purchased a NOCO GENIUS GEN2 charger for the gel type Optima batteries.
Which Model of the NOCO GENIUS GEN2 do you have?

My question is can I, space permitting, use the GEN2 to charge the Optima's
& use the Guest for the starter flood battery but attaching both leads to use a an 8 amp charger?
or will have to stick with the original plan and just replace the Guest with the GEN2 and wire the connections the same way.
I don't follow that! ??????

The 3 bank units were a little bit to big to fit in the original location.
You only have Two Banks to begin with.

Well I tried! :D
 

gwood

Seaman Apprentice
Joined
May 10, 2010
Messages
34
Re: Charger wiring

I apologize guys, I wasn't trying to confuse anyone.

I have 2 optima batteries wired in parallel with a AB selector switch, 1 starter flood battery.
My current charger is a Guest 2 bank 4/4 amp, 1 charger lead to optima's & 1 charger lead to starter battery.
I purchased NOCO GEN2 because it do not believe the Guest model was designed with GEL type batteries in mind.

So I have 2 options, I think;
1. Replace guest with GEN2 as a straight exchange.
2. Wire GEN2 so the 2 leads each go directly to a gel battery & then use the Guest charger to solely charge the starter battery but only if I could wire both leads to the terminals, as it is a 2 bank charger, giving me in essence an 8 amp charge.

Hope
 

UncleWillie

Captain
Joined
Oct 18, 2011
Messages
3,995
Re: Charger wiring

We still need the answers to the questions in Post #4 :confused:

For example.... I can't seen to find an Optima GEL-Cell battery, All I find are AGM Batteries. What Battery do you have?

"Batteries wired in parallel with a AB selector switch" >>> What is Switched????
What is attached to the B1 terminal?
What is attached to the B2 terminal?
What is attached to the COM terminal?

We can't see the wiring. Pictures or a thousand words please. ;)
 
Joined
Feb 17, 2012
Messages
2,906
Re: Charger wiring

what i think hes saying

he has 2 banks. Bank one is 2 optima batteries in parrallel. bank 2 is a standard wet cell for cranking.

he use to use a guest 2 bank charger to charge the 2 banks
he was worried that the guest could not recharge the optimas (he says they are gel but i can not find gel)

he purchased a new charger thats a NOCO GEN2 this is also a 2 bank charger. he plans to use the charger on the optimas only because it can charge gel batteries.

he wants to know if the guest 2 bank can be rewired so both bank cables go to the same battery which is the starting battery

he also wants to know if it would be better to remove the guest charger and just replace it with the NOCO GEN2 so one bank does the wet cell starting battery and the other does the 2 combined optimas batteries.

To the OP: are the 2 optimas blue top marine batteries as they are listed as agm
 

UncleWillie

Captain
Joined
Oct 18, 2011
Messages
3,995
Re: Charger wiring

I have the pieces, it is the details that are confusing.

If the two Gel Optimas are really AGMs and are wired in Parallel to power the 12 volt Trolling Motor;
Why would we we need a 2 bank charger?
One bank for the Optimas and the other for the starting battery?

The Guest Charger is now no longer needed.

If he wants to use the Guest to charge the Starter and the NONO for the Optimas for other reasons; OK.
But we still need to know the actual model numbers of the chargers and the batteries in question.

A Gel charger will charge AGMs and Flooded Cells; and an AGM chargers will charge Flooded cell just fine, Only a little bit slower.
Some will argue that this is actually better for the cells in question.

We could answer the questions if we only had the details.
 

gwood

Seaman Apprentice
Joined
May 10, 2010
Messages
34
Re: Charger wiring

Yes the batteries are Optima blue tops, sorry for more confusion!!
The AB selector is for selecting troller motor battery 1 or 2, was also using BOTH setting to charge both batteries. I installed a AB selector due to previous issues and advise whereby 2 batteries not separated by a selector would cause the better performing battery to only be as good as the lesser performing battery.
I have wired NOCO GEN2 for optima's only, as they will provide me with a faster charge. My aluminum boats 46# troller eats up batteries on 10+ mph windy days.
The Guest charger has been wired to the starter battery, now I am presuming it is an 8 amp charger. Hoping this is not a safety issue with the battery in respect to to many amps charge having an adverse affect and deteriorating the battery life or worse!!
 
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