Thread: 45 amp breaker?

Found this

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Originally Posted by brettw

Found this

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Don’t work good in wet inviorment.

I would try the 40 if already have one .

Lots of 50 amp breakers available on amazon.

What size breaker does it call for? Surely can't be a 45A breaker if its a 45A charger, it would pop every time. My guess would be 50A.

Originally Posted by brettw

Hi
I got a new GPC45 max charger rated at 45 amps.
It calls for a breaker near the battery.
Ive found 40 and 50 amp breakers.

Anyone got a suggestion?

Lets keep the costs low!


Thanks

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Is this going on a boat? It didn’t look like it was made for a marine environment. But maybe I’m missing something. With that said, I’d use the following circuit breaker if I were in your shoes. This breaker is only to protect the battery in case of a short on the cable from the charger to the battery. The charger should have built-in fuses to protect it, but the battery would be unprotected unless you add the other circuit breaker. This looks like a single battery setup. If I’m missing something and it’s for multiple batteries, you’ll want a circuit breaker on each battery. Just my two cents...

attwood 7623-7 Compact 50-Amp Marine Boat 12V/24V Circuit Breaker https://www.amazon.com/dp/B00BV89QXW..._XpsVCbF9Z38JJ


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Originally Posted by Barnettcrew

Is this going on a boat? It didn’t look like it was made for a marine environment. But maybe I’m missing something. With that said, I’d use the following circuit breaker if I were in your shoes. This breaker is only to protect the battery in case of a short on the cable from the charger to the battery. The charger should have built-in fuses to protect it, but the battery would be unprotected unless you add the other circuit breaker. This looks like a single battery setup. If I’m missing something and it’s for multiple batteries, you’ll want a circuit breaker on each battery. Just my two cents...

attwood 7623-7 Compact 50-Amp Marine Boat 12V/24V Circuit Breaker https://www.amazon.com/dp/B00BV89QXW..._XpsVCbF9Z38JJ


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Hi
Yes on a boat but should be well protected.
Its a 2 battery setup in series equaling 12 volts.
I would think one breaker on the positive wire would be enough?

Thanks for your reply.



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Originally Posted by Kevin22

What size breaker does it call for? Surely can't be a 45A breaker if its a 45A charger, it would pop every time. My guess would be 50A.

Thanks Kevin,
It actually doesn't say what size.
It does call for #2 or 4 wire, which seems like overkill.


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