Review on Anjoshi 150A Inline Fuse Holders - Circuit Breaker for Car Audio & Amps with Overload Protection & Reset Function - Replace Fuses Inverter 12V-24V DC by Andres Mayes

I bought 2 of these devices. Both blow MUCH less current than they should. One of them opens with 45 amps each time while the other usually reaches 90 amps before opening. The infrared thermometer shows them heating up which I think causes them to open early. I suspect that the contacts inside are badly or insufficiently dimensioned. I planned to use them before any battery pack powering the inverter in my RV. You are useless. I've spent more on a range of quality circuit breakers and they work great opening every time. I've also seen almost 2 volts drop across these switches when (attempting) to carry higher currents. I didn't measure their resistance, just threw them away!