Sterling Power AB12v 80amp with Yanmar 2gm20

[Jonahjonesrn]

Hi
I am looking at installing the Sterling Power Alternator to Battery 12v 80 amp unit to my Yanmar 2gm20 on my Dehler 34.
Can I still keep my off-on-both battery switch and if so I presumably just wire direct to the starter motor?
Unit looks relatively easy to install just wanted to keep the switch in place.
Any advice would be much appreciated.

In addition does anyone know where I can get my hands on a replacement instrument panel Type B for my 1989 Yanmar 2gm20?

 

[pvb]

Hi
I am looking at installing the Sterling Power Alternator to Battery 12v 80 amp unit to my Yanmar 2gm20 on my Dehler 34.
Can I still keep my off-on-both battery switch and if so I presumably just wire direct to the starter motor?
Unit looks relatively easy to install just wanted to keep the switch in place.
Any advice would be much appreciated.

In addition does anyone know where I can get my hands on a replacement instrument panel Type B for my 1989 Yanmar 2gm20?

Welcome to the forums!

The Sterling A-to-B charger has two separate isolated outputs, a boosted (higher voltage) output for the domestic batteries, and an unboosted output for the starter battery. This is to ensure that the starter battery isn't subjected to an unnecessarily high voltage for extended periods. So you should wire each output directly to the relevant batteries.

If you just want to smarten up the instrument panel, I think you can buy replacement stickers, eg - Yanmar 129271-91120 Replacement Sticker For B-Panel Surround - French Marine Motors Ltd

 

[VicS]

By installing an AB charger and keeping the 1,2,both selector switch you are heading for a mixed up and muddled system half way between a basic system controlled entirely by the selector switch and a system with dedicated start and house batteries , individual isolators and simultaneous charging via the AB charger

The alternator output should go directly to the input of the AB charger and the existing connection to the stater removed.

The outputs from the AB charger should go to the two batteries, ideally via isolators.
Note that the house battery gets enhanced charging similar to that from a multistage battery charger while the start battery just gets bog standard charging.
The attraction of the AB charger is that it gives this enhanced charging of the house battery without the need to modify the alternator for an advanced alternator regulator and at the same time gives simultaneous charging of both batteries without needing a split charge diode or VSR.

I suggest you post a schematic diagram showing how you propose using the 1,2 both switch.

EDIT Sorry duplicated much of what PVB has just said ... I was interrupted mid-typing by a phone call

 

[Jonahjonesrn]

By installing an AB charger and keeping the 1,2,both selector switch you are heading for a mixed up and muddled system half way between a basic system controlled entirely by the selector switch and a system with dedicated start and house batteries , individual isolators and simultaneous charging via the AB charger

The alternator output should go directly to the input of the AB charger and the existing connection to the stater removed.

The outputs from the AB charger should go to the two batteries, ideally via isolators.
Note that the house battery gets enhanced charging similar to that from a multistage battery charger while the start battery just gets bog standard charging.
The attraction of the AB charger is that it gives this enhanced charging of the house battery without the need to modify the alternator for an advanced alternator regulator and at the same time gives simultaneous charging of both batteries without needing a split charge diode or VSR.

I suggest you post a schematic diagram showing how you propose using the 1,2 both switch.

EDIT Sorry duplicated much of what PVB has just said ... I was interrupted mid-typing by a phone call

Hi
Thanks for the reply very informative.
So I probably don’t need the switch at all and can remove the VSR as well. Would I basically wire the house batteries to the 12v system directly through a switch and fuse and the starter would get a direct feed from the starter battery or is this done through the AB as well. I currently have the option for both on my switch just in case something happens to my starter battery and need to combine with house to start engine, is this overcome by use of the AB?
Regards
Jonah

 

[VicS]

Hi
Thanks for the reply very informative.
So I probably don’t need the switch at all and can remove the VSR as well. Would I basically wire the house batteries to the 12v system directly through a switch and fuse and the starter would get a direct feed from the starter battery or is this done through the AB as well. I currently have the option for both on my switch just in case something happens to my starter battery and need to combine with house to start engine, is this overcome by use of the AB?
Regards
Jonah

Alternator output direct to AB ( fused as indicated in instructions)

AB outputs to batteries ( fuses as instructions)

https://cdn.shopify.com/s/files/1/0658/7343/files/AB12130.pdf?477

Starter battery to engine ( starter motor solenoid). House battery to domestic distribution panel.

Separate battery isolator switches. ***
An emergency linking switch ........... downstream of the isolators so that a dead battery can be left isolated and all systems run from the good one

***A dual circuit isolator ( both isolators combined into one "lump") might be of interest, because you then have only one switch to operate instead of two.

VSR made redundant by the AB charger

 

[PaulRainbow]

Separate battery isolator switches. ***
An emergency linking switch ........... downstream of the isolators so that a dead battery can be left isolated and all systems run from the good one

***A dual circuit isolator ( both isolators combined into one "lump") might be of interest, because you then have only one switch to operate instead of two.

But the dual circuit switch does not allow any of the features of separate switching that you describe in paragraph one. I'd go for separate switches.