OCPD for this?

[wired1]

What, if anything, do I need for an Over current protection device between my Buss bar and this unit?
I have a 125 amp breaker between battery+ and the buss bar.
I have 4 x 12 volt 200 AH batteries in series that all have 100 amp BMS's. They feed a EG4 3000 EHV-48 solar inverter charger. No PV as yet, that's next...

Charge-Discharge Monitor, DROK 0-90V 100A DC Ammeter Voltmeter, Battery Capacity Amp-Hour Watt-Hour Power Time Multimeter, LCD Display Digital Voltage Current AH WH Watt Meter Tester with Hall Sensor​

 

[Sean Very North]

A tiny little fuse

 

[timselectric]

Find out how much it draws. And fuse accordingly.
Definitely less than 5a. Maybe less than 1a.

 

[wired1]

Find out how much it draws. And fuse accordingly.
Definitely less than 5a. Maybe less than 1a.

All I have are 12 volt fuses??
And only a 12 volt fuse panel that I'm afraid to hook up to 54 volts? IDK

 

[timselectric]

All I have are 12 volt fuses??
And only a 12 volt fuse panel that I'm afraid to hook up to 54 volts? IDK

At that small amperage, I wouldn't be concerned about using automotive fuses.
Above 10a, I would use the proper voltage rated protection.
Voltage can create an arc. But amperage is required to sustain it.

 

[wired1]

Find out how much it draws. And fuse accordingly.
Definitely less than 5a. Maybe less than 1a.

At that small amperage, I wouldn't be concerned about using automotive fuses.
Above 10a, I would use the proper voltage rated protection.
Voltage can create an arc. But amperage is required to sustain it.

So, would it be proper to connect a 12 volt fuse panel and feed it from the 54 volt buss? And then use perhaps a 3 amp 12 volt fuse?

 

[timselectric]

So, would it be proper to connect a 12 volt fuse panel and feed it from the 54 volt buss? And then use perhaps a 3 amp 12 volt fuse?

I wouldn't be concerned at all.
As long as you keep the fuses smaller than 10a.

 

[timselectric]

Don't forget to protect the fuse box feeder.

 

[wired1]

Don't forget to protect the fuse box feeder.

Thanks, because I would've!