2 Pack 40A Audio Inline Circuit Breaker Reset Fuse 12V/24V DC, PowMr Reset Fuse Holder 40 amp with Manual Reset for Car Audio, Stereo Switch and Solar Inverter System

Pro: They work great, I have solar panels on my RV. goes between panels and controller This device gives me the ability to cut power to my RV from the solar panels as well as protection. A must have if you install solar panels on an RV.Neg: wiggle the connector when turning on or off to make sure it"s on or off. When working with electrical always double check everything.

I use these all the time as a disconnect for the solar panel to the solar controller. As you know you must never have solar power coming into the solar controller if the battery is not connected. You can disstroy the controller if you do. I know, as I have made this fatal mistake, by mistake or ignorance. It can be costly. I use only MPPT controllers and they run around $150.00 and up. They also serve as a breaker for over power surges, for what ever reason. They are cheap insurance as well very hand when you need to disconnect the panel for any service work that must be performed. Always remember the breaker needs the be 10% larger than the current that the panels can produce. Solar is fun, let's be safe smart about it.

I gave 4 stars because when I tried to use the weatherproof ends, the breaker would not have any continuity, even though the breaker was in it's set position. By loosening the plastic ends the circuit would have continuity. Fortunately I did not need the waterproof characteristics and was able to remove the ends permanently.

I am using them for the 50Ah LiPo4 battery.One is for charging and the other is for drain.73

So ordered a 2 pack for my camper charge line rated at 12v @ 30 amp draw and got 40 amp for the "surge" at first it didn't seem bad. But I noticed when the camper was less than 75% charged it started tripping. Put a meter on it recently and it was pulling around 25 amps. Then I started noticing the crackle and it getting warm. Pulled my second out of the glove box and swapped it out, never used this one before. Swapped them out and turned on the truck, plugged in the charge line and I heard it crackling at 27amps. I let it run long enough to actually get hot, it never tripped but could be disconnected. This can't handle the amps, and is a waste of money and time if it actually has to do its job, it WON'T.

Easy to connect…perfect for my off grid solar system.

I installed two of them on my Case Tractor and used them during haying and they worked great, they are a very fine product. I ordered Two more just to have on hand,

Used in a solar system. Did not work good with no.10 stranded aluminum wire. Wire deformed past threads on the set screw.