Smart shunt travel trailer wiring

[sky-line (smith)]

Thats a really interesting setup you have got there! Using the chassis as the negative return can definitely work but with the Smart Shunt its important to make sure all the negative connections loads, chargers and anything drawing or sending power pass through the shunt so it can read everything accurately. If even a few grounds go straight to the chassis instead of through the shunt your readings might be off. Are you planning to connect the shunt directly between the battery negative and the chassis or will it sit somewhere else in the circuit?