Originally Posted by
Isetech
So once again lots of confusion, where do you install busbars, fuses and switch disconnects for batteries for inverters.
If you have one battery 100 amp/hr, its simple you fit a fuse disconnect with a 125 amp fuse, using a 25 mm fine stranded battery cable designed fot the application.
If you have you 2 x 100 amp/hr batteires and 1 x inverter: Then you can to connect them in cascade parallel using the same 25 mm cable (because most lithium 100 amp/hr batteries only have 25 mm terminals) connected to a 160 amp fuse disconnect with 125 amp fuses and all is good. Or you could just connect both batteires to a 200 amp fuse disconnect and a 50 mm battery cable from the fuse disconnect to the inverter.
Now we move onto 3 batteries with 1 inverter, this is where it gets a little more complicated, now you have 3 batteries, some will say it fine you just run a 25 mm cable from each battery to a bussbar, connect the busbar to the inverter using bigger cable 50/70 sqmm. The question some will ask, what protects the cable from the battery to the fuse switch disconnect, the reason you are a fuse is to protect the cables, how do you protect the cable from the battery to the 200 amp fuse? You could once again connect the batteries in cascade parallel (like the cabinet batteires) and take the leads at the end and connect all 4 (2 red and 2 black) to the 200 amp fuse.
Wall mounting lithium batteires is an expensive installation method, if you plan to fit more than 2.
Mabye use a Vitctron busbar bar with fuse protection, a 100 amp fuse would protect the battery cable, but what about a double pole disconnect ? Why do you need one.
To throw a spanner in the works, if the terminals are like sosket outlets and you can just unplug them why the double pole switch disconnect, why not just fuse protection?
On some batteries the teminals are closed with the a cover which requires a tool to remove the cover to access the terminals.
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