[RV8R]

This is one of the reasons that I use a breaker for each parallel battery or battery string.

Not interested in turning the batteries into “Arc Welders” ? 😁

That is why I use a Pos battery terminal fuse ,,, & remove the ground terminal wire first & tie it’s floppy self off first (when I remember).

 

[Dirtrider]

If you have any more of those cheap Amazon China breakers, I'd get rid of them. I've had two of mine go out and others here on the forum have reported more failures.
Use fuses or high quality breakers like BlueSea.

Gary

I have another right before the inverter that will be replaced too. I liked the ability to kill power before the device but I can installed another power cutoff switch in it's place If I want.

 

[larry barello]

Another cheap Amazon Circuit Breaker Failure

Hi, I've now had 4 failures of cheap import 12 volt circuit breakers from Amazon. This one was a 30 amp breaker between the solar charge controller and house battery. This circuit never carries more than 15 amps, but the 30 amp breaker opened. I use solar to keep the batteries charged...

www.promasterforum.com

 

[HarryN]

Not interested in turning the batteries into “Arc Welders” ? 😁

That is why I use a Pos battery terminal fuse ,,, & remove the ground terminal wire first & tie it’s floppy self off first (when I remember).

Mostly I just want an easy way to take the voltages down to zero to work on them, especially since my son helps me.

It also provides an easy way to re-set the BMS on Li batteries.

Last but not least, since I use the 187 type breakers, the largest version is 200 amps.

I can easily convince a customer to flip a breaker on / off in the middle of the night, but getting out tools to remove a fuse for a "test" - forget it.

 

[Dirtrider]

Update to my old problem
I replaced only the circuit breaker near the battery with a ANL fuse and for testing, I ran the heater again. That ANL fuse worked fine BUT the other circuit breaker near the inverter did the same thing, dropped voltage for just a second which is enough to trip the inverter. I replaced the last circuit breaker with a ANL fuse and the system worked fine. Tested it 3 more times after letting it completely cool down between tests. No issues at all. It takes about 12 mins to heater up completely, the inverter fan kicked in twice and turned off as it should, no real heat issues could be felt, and very little battery used so I think it's OK.
Lesson learned on which type of fuse for this application and it had very little voltage drop from the battery to inverter through these fuses. Thank you all for the input and suggestions

 

[el Jefe]

Update to my old problem
I replaced only the circuit breaker near the battery with a ANL fuse and for testing, I ran the heater again. That ANL fuse worked fine BUT the other circuit breaker near the inverter did the same thing, dropped voltage for just a second which is enough to trip the inverter. I replaced the last circuit breaker with a ANL fuse and the system worked fine. Tested it 3 more times after letting it completely cool down between tests. No issues at all. It takes about 12 mins to heater up completely, the inverter fan kicked in twice and turned off as it should, no real heat issues could be felt, and very little battery used so I think it's OK.
Lesson learned on which type of fuse for this application and it had very little voltage drop from the battery to inverter through these fuses. Thank you all for the input and suggestions

Remind me. Do you have an inverter with AC Out 1 and AC Out 2? Is your inverter programmable?

 

[Dirtrider]

Renogy 2000W has 3 outlets to plug into and one high output terminal to hard wire to.

 

[el Jefe]

Renogy 2000W has 3 outlets to plug into and one high output terminal to hard wire to.

I asked because some inverters have passthru on ac out2 which can be programmed for dump load based on state of charge. Renogy has no ac out2 so that scheme is not available.

 

[Baylinermy]

Inverters don't like inductive loads. Check out pysystems.com. though a boat electrical company tons of info and videos on all things 12v electrical

 

[HarryN]

Inverters don't like inductive loads. Check out pysystems.com. though a boat electrical company tons of info and videos on all things 12v electrical

Good ones don't mind, but yes it is definitely a factor. I struggle to explain to customers that a $2K inverter is different than a $200 one. Usually have to demonstrate it using various loads.