Battery Master - route to engine batt

[roxburd]

McLouis Fusion 331. Battery Master. So I decided to site it under the driver's seat for easy access to view the status LED and for direct access to the leisure battery positive - on the load side of the isolator. I also routed a nice ground to the driver's door step. So it's installed and working but I haven't found a good route to the engine battery yet - it's on a flying lead at the moment. Anyone know of a good route - from under the driver's seat?

 

[tonka]

Will help to state the year of the van..
Being a Fiat and depending on the year it may have the engine battery either under the floor between the front seats or it's in the engine bay on pre 2006 models.

 

[David and Sally]

Don’t most put them onto the back of the charger/distribution thingy.?

 

[autorouter]

The BatteryMaster starter battery connection only carries a small trickle charge, about an amp, so the connection can be a thin wire, and it can piggyback on any existing more substantial connection to the starter battery. You will find such a connection at the distribution/fusebox, or at the B2B if there is one fitted.

Another possibility is if you have a dual solar charge controller, that trickle-charges the starter battery - there will be a suitable connection there. All these options are usually easier than routing a wire all the way to the starter battery.

 

[roxburd]

It's the 2021 model - the engine battery is under a panel under the passenger's feet. I can go direct under the flooring but it's a bit awkward to lift the flooring and there's no conduit so it's not ideal as the wire could get abraded over time. Or I could look for a conduit route to the engine battery compartment. Or I could look for a route up to the fuse box in the dash by the driver's door.
I think I'd rather go to the engine battery side of all components - i.e. the battery side of all fuses or other components. So that if a fuse blows the supply is cut full-stop, without exception. If I go load-side of any component then if a fuse blows, the Battery Master will supply 12v intermittently to a circuit that should be permanently dead.
Similarly, that's why I went to the load side of the leisure battery isolator, rather than the battery side - so that if I isolate the leisure battery, it is fully isolated and cannot feed 12v out anywhere.

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[eddie]