Product Introduction The MT003-BL brings the same voltage sensitive relay design to a blue housing, giving installers a colour option that separates the dual-battery relay from other components on a crowded panel. Everything inside is unchanged: a 12V DC unit rated at 140A continuous with a 160A intermittent allowance, built to manage charge flow between a start battery and an auxiliary bank. In daily use the relay closes as soon as charging voltage appears, letting both