Help me choose a fuse and shunt
Four 6v golf cart batteries connected together with 2AWG wire, then 4/0 wire used to connect to the inverter posts. Inverter posts also connect to PD9270 converter/charger. According to wiring gui...
Forum Discussion
The existing neg wire to the frame from the neg battery post will now go from the shunt's outer end to the frame. It can be the same gauge as now since it will not carry any more amps than before.
It will not go from the inverter neg. (especially if the inverter is also chassis grounded to the frame--things can get weird in the inverter's GFCI receptacles)
The inverter's neg wire will now go to the outer end of the shunt and not to the battery neg. Same with all the other negs like the solar controller's.
You will now have a fat wire from the inner end of the shunt to the neg battery post that needs enough ampacity to carry the total of all the amps arriving (or leaving depending on your country :) ) at the outer end of the shunt at any one time. (Inverter running MW plus water pump plus lights, and then the furnace comes on too, eg.)
Your fuse(s) go on the pos wires and have nothing to do with the shunt etc on the neg wires. Fuse size for the wire gauge(s) One big fuse does not cover all sins. Each branch wire to the buss needs its own smaller size fuse and then the fatter wire from the buss needs a big fuse.
Your shunt size should go with whatever monitor you are getting. If you get the Trimetric, you will need its 500a shunt, not the little 100a one. (IMO just bite the bullet and get the Tri instead of fooling around with cheaper kinds that can't do it all)
It will not go from the inverter neg. (especially if the inverter is also chassis grounded to the frame--things can get weird in the inverter's GFCI receptacles)
The inverter's neg wire will now go to the outer end of the shunt and not to the battery neg. Same with all the other negs like the solar controller's.
You will now have a fat wire from the inner end of the shunt to the neg battery post that needs enough ampacity to carry the total of all the amps arriving (or leaving depending on your country :) ) at the outer end of the shunt at any one time. (Inverter running MW plus water pump plus lights, and then the furnace comes on too, eg.)
Your fuse(s) go on the pos wires and have nothing to do with the shunt etc on the neg wires. Fuse size for the wire gauge(s) One big fuse does not cover all sins. Each branch wire to the buss needs its own smaller size fuse and then the fatter wire from the buss needs a big fuse.
Your shunt size should go with whatever monitor you are getting. If you get the Trimetric, you will need its 500a shunt, not the little 100a one. (IMO just bite the bullet and get the Tri instead of fooling around with cheaper kinds that can't do it all)
