ARB Twin Compressor wiring to two different batteries? (1 Viewer)

[hoser]

Hmm, some examples of what can go wrong:
-using a 10-20A DC-DC charger would not be able to replenish the aux battery as fast as the compressor can discharge
-having the Aux battery located in the trailer will also charge slowly if hooked up the way most people hook it up (no trailer mounted DC-DC charger).
-using a voltage sensing dual battery isolator.... where it disconnects the aux battery if it detects low voltage on the main battery (i.e. 12.7V). A large compressor could conceivably cause this condition with a marginally performing alternator set-up.

 

[r2m]

Job done, pretty happy with the result.

That backing plate is very good fore thought to avoid stressing the plastic inside that cubby every time you couple/uncouple your hose, especially if you're trying to attach/detach the hose when under pressure.