Connect lead c to fuse box 2 insert a 40amp strip link fuse and tighten both of the 8mm nuts.
Split charge relay fuse size.
When the engine is not running ignition is off the split charge relay will open and disconnect the batteries.
Each battery that connects into the split charge device should have an appropriately rated fuse installed in line with the cable as close as possible to its ve terminal.
Terminal heat shrink tube for car truck boat marine 4 6 out of 5 stars 21 12 99 12.
8mm to 10mm terminals spare terminals heat shrink pack for modifications if required.
Sizing your split charge unit and connecting cables.
This minimises the unprotected length of cable the section from the terminal to the fuse.
1 x 500mm 110amp red relay to fuse box lead 6mm to 6mm terminals 1 x 250mm 110amp red fuse box to leisure battery lead 6mm to 8mm terminals 1 x 1000mm 110amp black earth cable.
The following formula will give you size fuse you need.
It should be sufficient for most vehicle alternators.
Voltage sensed split charge relay 2.
Cable ties self adhesive bases to keep it all tidy.
When installing the cable in your split charge relay system use a cable of at least 16mm2 cross section 110a and upwards.
Watts divided by volts times 1 25.
2 x fuse holders and fuses including spares 4.
If the cables runs total from alternator to relay relay to battery are long your 10mm cable may result in excessive voltage drop although safe enough it ll be ok up to around 7 or 8 ft but for 10ft i d use 15mm and for 15 ft 20mm.
Cable to connect everything together depending on the size of kit you purchased 3.
What size cable should i use for my split charge relay.
Winjun 4pin split charge relay switch 12v dc 200 amp heavy duty high current with connectors accessory.
June 11 2019 at 3 26 pm.
Typically split charge relay is controlled by the ignition wire so that when the engine is running ignition is on the split charge relay will close and connect both main battery and auxiliary battery.
So if you re blowing 15a fuses with a 150w led setup then i think it would be better to try a 20a fuse with wire and relay sizing to match.
