Replace LB with AGM advice

[BlueBambi]

Apologies in advance as this subject is covered lots in the forums , I just don’t know the answer for me, as clueless!
I need to change my leisure battery. It is a lead acid. I was going to go AGM.
I have a Sargent EC155 power supply unit and have a Victron 215W solar panel and Victron smart solar MPPT .
I wanted to just change one for one but the advice in threads has confused me.
Could I swap one for one with my set up and it be ok?
My concerns or observations from other threads are:
- The charger wouldnt be high enough volts to charge AGM battery’s?
-The solar input can be increased on the app to be high enough for AGM.
-If solar input adjusted for higher , this may be too high for the starter battery when in absorption? The Starter battery is lead acid too.
-would AGM LB be ok with a lead acid SB?
- My alternator isn’t a smart one I don’t think . People mention that as relevant.
-people mention DC to DC charger needed? I don’t want to mess around changing the set up, just change the battery.

Any advice on can I put an AGM LB straight in without changing system Or causing damage would be appreciated .
I’ve added a pic of my starter battery as that helps confirm if the alternator is a smart, on some other threads.
Thanks all

 

[drinfinity]

It looks like there are a couple of black wires connecting directly to the -ve of the starter battery. This bypasses the shunt, so the van can’t see all the current flowing through the starter battery. They should be connected to a chassis earth point instead.

What is the red wire dangling bottom left corner of the photo?

 

[Anakin]

From your picture, it looks like you have an AGM starter battery (bottom left icon on the battery?) already. You probably have a smart alternator as you have a shunt on the negative battery terminal. You have a conventional Amber Valley split charger (right of the battery).

Cheapest option: just replace your leisure battery with another AGM battery.

 

[Deaky]

Your starter battery is AGM. Your alternator is smart. I would hope you have a dc-dc charger as those red cables look far too thin to carry the potential current a relay battery separator could involve.

Can you post a pic of the leisure battery

 

[BlueBambi]

That is the Lb that is not holding charge so I need a new one.
The charger is a sergeant , but I don’t know about a dc/dc.
It was all as it is when I got it after a conversion.
So the starter battery is AGM?

 

[BlueBambi]

From your picture, it looks like you have an AGM starter battery (bottom left icon on the battery?) already. You probably have a smart alternator as you have a shunt on the negative battery terminal. You have a conventional Amber Valley split charger (right of the battery).

Cheapest option: just replace your leisure battery with another AGM battery.

The set up is as it was when I got it after being converted. I didn’t know the starter was an AGM. I have a sergant EC155 power control system. But don’t know about a dc to dc charger that people say about?
So if I change LB to AGM the set up ok?
Someone said the wires too thin?

 

[BlueBambi]

It looks like there are a couple of black wires connecting directly to the -ve of the starter battery. This bypasses the shunt, so the van can’t see all the current flowing through the starter battery. They should be connected to a chassis earth point instead.

What is the red wire dangling bottom left corner of the photo?

The set up is as it was when I got it after being converted. I think it is the split charger wires to the EC155 power supply unit as it charges the starter and LB.

It looks like there are a couple of black wires connecting directly to the -ve of the starter battery. This bypasses the shunt, so the van can’t see all the current flowing through the starter battery. They should be connected to a chassis earth point instead.

What is the red wire dangling bottom left corner of the photo?