Sterling Pro Combi Quasi Sine Wave Inverter not Charging Starter Battery

[Alex Cat]

I've inherited a Sterling Pro Combi Quasi Sine Wave inverter.
https://sterling-power.com/products/pro-combi-q-quasi-sine-wave

I've been on shoreline for the past few days and was intrigued that although my leisures are running at around 13, my starter is at 12.
I've been advised that this is because the inverter isn't charging my starter battery - that'll only be done via the alternator when I run the engine.

Does this mean that even on shoreline and in a marina, one has to run one's engine to maintain the health of the starter battery?
And should I be concerned that my starter battery has been on 12V the past 3 days?....

[WotEver]

You need a VSR which will connect the starter batt to the domestics whenever they are being charged. 

The user manual for your Combi shows it:

https://cdn.shopify.com/s/files/1/0658/7343/files/Combi_Q_S_fitting_instructions_USA_EURO_ba72847f-0490-44d2-98b3-957275f333ac.pdf?789

[rusty69]

5 minutes ago, WotEver said:

You need a VSR which will connect the starter batt to the domestics whenever they are being charged

Is it possible they have one, but it is faulty? 

(got the right thread) 

[WotEver]

Absolutely (again

Only a look at the wiring diagram will tell us what's currently there. 

It's quite possible that they have a split charge relay which will put back the few Ah that the starter batt used in double quick time when the engine is running, so the previous owner wasn't worried about it when on shore power. 

[Alex Cat]

Ok - thanks very much.

I have no idea if I have a VSR.

How would I know?

Is this something I can find?

 

Again, many thanks.

[rusty69]

Just now, Alex Cat said:

Ok - thanks very much.

I have no idea if I have a VSR.

How would I know?

Is this something I can find?

 

Again, many thanks.

Have you a wiring diagram, or perhaps upload some pics. 

[mrsmelly]

If you carnt be arsed messing with your boat wiring you could easily purchase a small output smart charger and just connect to batteries and plug into mains socket whilst on landline. Or slightly more faffing and a bit more money a small solar panel say 40 watts dedicated to your starter battery would always ensure its topped up albeit slowly in the winter.

[tommytelford]

I have an old fashion rotary swith (1,2,off or both). I just turn it both when on landline and hey presto charged starter batter