It friggin WORKS!

Geek out time.

I built and tested the logic that will regulate the battery isolator between the chassis battery and the coach batteries.

Simple logic. IF the coach batteries fall below 12 ish volts, AND the engine is running, open the isolator solenoid so they all can be as one:)

The engine must be running, and the alternator charging or I will kill my chassis (starter) battery

I don’t want to keep pumping voltage into the fully charged coach batteries. (>13V or so)

I Don’t want the coach batteries to fall below 11VDC?

I wrote a couple simple Python routines and called them from functions in nodered ( It took me way longer to figure out how to trigger them from

Here are SOME of the nodered flows for the entire system.

Just another sprinter fan