I agree not to go with the switch you have or any audio breaker. The switches I looked at were very big, more than the Blue Sea. They are also very expensive. I’m sure you’ve looked at switches like that.
I made a list of things not compatible for a 48 volt upgrade, and those Blue Sea switches were on it. I also had all my fuses were rated at 33 volts tops, to include my ANL Battery fuse 32 volts, my Maxi FUse 33 volts, my ATC fuses. What surprised me was my 600 amp powerbar was only rated to 48 VDC. That is an 8 post, 3/8” stud, 12” long busbar, and that would be no good for a 48 VDC upgrade.
Also, the Victron SCCs I chose would only do 12 volt or 24 volt batteries.
I decided not to replace all that stuff and am going to 24 volts instead of 48 volts.
48 volts is supposed to be the magic number where arcing occurs and I think that’s why the switches designed to handle the load for the high amperages a 48 volt system are much thicker. I was surprised to when I hooked my three 100 watt panels up in series and did an ohms check and found at three amps there was a bit of an arc.
I’ve got mixed feelings about using a breaker for the main cutoff and its mostly needs to be an easy to find switch for an “In Case of Emergency” that anyone can go and shutoff. Shut off the big red switch is easy, especially when there are a dozen beakers.
