An interesting topic which popped up on this forum, the use of circuit breaker type disconnectors for batteries.

Lets say you connect 2 x 5 kwh (100 amp/hr) batteries to one inverter.

Someone started th trend of using fuse type disconnectors, and as with anything the rest just followed.

If the batteires have built in circuit breaker type disconectors, do you still have to install a fuse type disconnector ?

This is an interesting question, similar to the fact that you have to fit a disconnector on the wall for safe isolation for a machine.

If the battery is part of a system installed, why would you need to install another disconnector on the wall.

If you switch off the disconnector which is part of the battery and disconnect the wires, and leave them hanging loose, its safe right, actually its not, the battery chargers and discharges.

However if you have battery terminals, which are insulated, then it should be fine right?

What is the purpose of the switch disconnect, to safety isolate the battery?