parts PTT Hi-Amp 1/4'' studs Circuit Breaker 40 Amp 12V 48VDC Waterproof IP67 Thermal Battery Switchable Power Reset Inline Fuse Holder Protection for Marin RV Caravan Trailer Troller Bus Heavy Truck

very pleased with its overall performace

I'm using this as a breaker between my batteries and inverter in a 12 volt solar setup. The item looked okay upon delivery, checked out for continuity etc. However when I connected everything up and switched on my inverter, the inverter would beep indicating a low battery voltage. Checked the batteries, the battery voltage was fine with the inverter on or off, however when measuring the voltage at the inverter posts, it was a very low 8VDC with the inverter switched on.After some troubleshooting I actually discovered that when ANY load was applied to the breaker it would immediately exhibit a volatage drop across the two posts with battery voltage on the battery side, but only 6-8VDC present on the load side.I have tried manually resetting the breaker but no joy, this thing is useless to me so will be returning it.

Nothing to dislike, nice operation in isolating the panel before you disconnect any cables.