Blue Sea Systems 7048 187 Series Circuit Breaker, Panel Mount, 150A DC

Another great blue sea product. Great quality and clean look. I used this on a dual battery system overland build.

The best breakers you pay for what you get stay away from the cheap ones well worth a piece of mind you won't burn to death at nite

I use this for a solar panel disconnect. Since I needed a switch to disconnect my solar panels, I bought this which is roughly the same price as a switch and you get the bonus of have a circuit breaker. While a fuse or circuit breaker isn't necessary for solar panels, it nice to have. Pulling a fuse or a wire is not ideal since DC current sparks like crazy and is hard on connections- a proper switch is truly needed. This circuit breaker is rated for continuous duty. Blue Sea makes a less expensive one for intermittent duty. DO NOT get the cheap one if you are running current through it all the time. Get this one. Neither is the less expensive one meant to used as a switch. This one you can use as a switch and not worry about wearing it out prematurely. It looks nicer making for a more professional-looking installation. This doesn't heat up when used continuously, which means a more efficient use of electricity; a crucial consideration when solar is your only source of energy.

I've had this installed in my converted sprinter van to use for sending power back to my house batteries, and haven't had any issues. Unit seems really solid and well built, the breaker shuts off when I trip it, and it was easy to install.

First of all I purchased the 187series 200amp version and connected it to the positive terminals on my 200Ah LifePo4 battery. Tested it with a heavy load of 210amps. It didn't trip or showed any signs of tripping . At least I can shut down the battery easily.I then decided to spend another $100 on a 150Amp version. This time I connected it between my 2500watt inverter and the battery - making sure I connected the line to the line and the load to the load.Again tested it by plugging in my1100watt kettle and turning on the microwave at the same time. I wanted to simulate a situation whereby I might do this accidentally. I dont want to draw that much power (210amps) from my Battery at the one time.Again the 150amp didn't trip or no sign of it to trip.I had previously increased the cable size on the inverter from 16mm2 (pair) to 35mm2 because the 16mm2 was getting uncomfortably hot..I decided to put the original cables back in againTested once again with the same load.STILL NO TRIP. Although the cables were worryingly hot.Now it only serves as an on/off switch.I am no EE. At this stage I reckon the the cabling would be in a sorry state when these Circuit breakers trip.Perhaps I am doing something wrong.The Breakers seem very robust.I tried to do the responsible thing by fitting circuit breakers and good high amperage cable.Now it looks like I will have to go back to a Plain Old blade Fuse.

BlueSeas always meets expectations. The standard in marine electrical components.

I've used them many times without any failures on my snow/ice removal trucks and brine equipment.

I built myself am extra fused power block for my 2011 Ford Crown Victoria and wired this straight to the fuse block to operate an internal cabin Rove 2 4K dash cam. The on/off switch enables me to turn the camera on when needed and off when not. The voltmeter is a plus as my car has a higher rated alternator (200 amps) than a civilian Crown Victoria (135 amps). It enables me to monitor the volts going through my extra fuseblock and ensures that my system is operating inside nominal parameters (14 amps).