I have a 200 amp manual reset circuit breaker for our inverter . In the background you can see our house battery disconnect switch .

The culprit was the thermal breaker which on my Breakaway is located on the forward wall of the domestic batteries compartment. As directed, I measured the voltage of each post. 12V in, 3.2V out. The symptom was resolved by bypassing the breaker.

Couple questions, please:
I notice a set screw (with a lock nut) in the middle. Can these be adjusted?
Is the same item available new? I did not find one.
If I bought a different breaker what should the amperage be?

It took a long time to diagnose this because it would occur rarely and then reset before I could test everything. Thanks Harold for your direction.

Glad to hear you found it . Intermittent electrical problems are difficult to find .

You can replace it with one that has a reset like the one attached to my batteries. The one in my picture powers my inverter , so it is sized according to the maximum load of the inverter . You will need to have some idea of the actual amp load . Unless you are running an inverter on the same breaker , then your load will be the interior lights , water pump , stereo ....things like that are lower amp draw but do add up .

I have no extraordinary domestic 12V draw with the exception being I run a portable 750 watt inverter for my original old-school 19" TV. The inverter is pretty much at capacity. So that's 62 amps alone. My lighting is LED. Have a 3-way fridge.

So can you recommend an amperage for my replacement breaker?

quote:

Originally posted by Pirate19:
I have no extraordinary domestic 12V draw with the exception being I run a portable 750 watt inverter for my original old-school 19" TV. The inverter is pretty much at capacity. So that's 62 amps alone. My lighting is LED. Have a 3-way fridge.

So can you recommend an amperage for my replacement breaker?

On mine those were labeled 80 amps. I had a number of them. I was able to reuse most of them. If memory is correct I replaced one with 80 amp like Harold.

It appeared that I had a choice between 80 and 100 amp. You’ve made my choice easy. Would rather have the protection with the possibility of having to reset
Thanks.

They aren't very expensive , so if you start with an 80 and it trips too often you can try a 100 amp . Most likely the 80 will be fine .

Our 2000 watt inverter is on its own breaker and cables , there isn't much load on our original 12 volt house system . Mostly just lights , water pump , vent fans , stereo , ham radios and the cb radio .