30A Inline Circuit Breaker Reset Fuse, PowMr Reset Fuse Holder 30 amp with Manual Reset for 12V-24V DC Car Audio, Stereo Switch and Solar Inverter System(2 Pack)

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

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.

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

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.

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.

I've been through countless versions of these and find the amperage capacity to be hit and miss as compared to the "rating". I bought these 40a breakers to replace a couple of 50a rated ones from another vendor that were tripping at 20a. They stay cooler and have not tripped at 20a. The voltage drop is also a bit less than the bad 50a rated breakers were showing. (Which makes sense, since heating of the bimetal element due to excess current flow is what trips this style breaker...)

Work well with my solar system. Recommend.

I bought four of these to use with my solar setup so that I can connect/disconnect power easily. They are also a breaker so should work great if I have s short.

Pack of two, the first one didn’t work at all, I replaced it with the second one and Its working fine, by the time I got to install them I was too late to return the first one.

This product arrived very quickly after ordering, and I used them on my caravan power board, and they worked perfectly. I highly recommend this product.

Bought 3 of these 2 did not work without modification I do not recommend buying this item