Battery Charging Schematic

[Porthandbuoy]

I've got a bit of re-wiring to do, starting with the battery charging system as the Sterling Pro regulator, Pro-Split-R splitter and MPPT controller are all new to me. I've come up with this schematic and would appreciate any constructive feedback.
Note: Cable idents have not been assigned yet.

 

[PaulRainbow]

If you are connecting the negatives to battery 2, connect the positives to battery 1.

 

[Porthandbuoy]

If you are connecting the negatives to battery 2, connect the positives to battery 1.

I see what you mean Paul. Probably better to connect the -ve bus to House Battery 1 and minimise serial connections on the -ve cables.

 

[PaulRainbow]

I see what you mean Paul. Probably better to connect the -ve bus to House Battery 1 and minimise serial connections on the -ve cables.

You can do either, as long as the negative comes from one battery and the positive from the other.

Are you planning to fit a battery monitor ?

 

[Porthandbuoy]

Are you planning to fit a battery monitor ?

There is a shunt and battery monitor already fitted on the house batteries only. Not sure how that one is wired (can't get to the boat until next week), but am considering replacing with a Victron Smart Shunt

 

[PaulRainbow]

There is a shunt and battery monitor already fitted on the house batteries only. Not sure how that one is wired (can't get to the boat until next week), but am considering replacing with a Victron Smart Shunt

In that case,the negative wiring isn't correct.

Connect the engine battery and engine negatives to the negative bus.
Connect the house negative to the monitor shunt.
Connect the other end of the shunt to the negative bus.

Move the house positive to battery 1.

 

[Porthandbuoy]

Paul. Many thanks for your advice.
Here's v2 of my schematic showing the engine battery and alternator ground connected to the -ve bus, the shunt between the domestic batteries and
the -ve bus, and the domestic -ve and +ve from different batteries. I've also added the emergency parallel switch between the engine and domestic batteries.

 

[PaulRainbow]

Paul. Many thanks for your advice.
Here's v2 of my schematic showing the engine battery and alternator ground connected to the -ve bus, the shunt between the domestic batteries and
the -ve bus, and the domestic -ve and +ve from different batteries. I've also added the emergency parallel switch between the engine and domestic batteries.

View attachment 204438

Battery wiring is spot on. I would connect the emergency switch to the load terminals of the isolator switch, this has the added benefit of being able to isolate a dead/shorted battery and running everything from the good ones.