This dual battery isolator kit allows you to charge two batteries at the same time from your engine alternator. The isolator kit will begin charging the second battery simultaneously when the start battery is sufficiently charged whilst engine is on. 
The isolator kit will disengage from charging the auxiliary battery when the engine has stopped. This isolates the start battery, eliminating the possibility of draining it. This ensures you always have enough charge to start your engine, and also protects sensitive electronic equipment powered from the auxiliary battery from harmful engine start-up spikes. 

Kit contents 
1 x Dual Battery Isolator with mounting screws 
1 x 6 metre length of 10mm square red cable terminated at both ends 
1 x 600mm black earth cable 
2 x Positive Marine battery terminals 
1 x Negative Marine battery terminal 
1 x SC25-10 Copper crimp lug 
2 x 16-8 Copper crimp lugs 
2 x Red heat shrink 
1 x Insulated blue ring terminal 
6 x 200mm cable ties

Features

• Emergency override feature
• LED status indicator
• Suitable for 12VDC Marine, 4WD, caravan and solar applications

Continuous rating: 140A 
Intermittent rating: 170A 
Voltage rating: 12VDC (max 15VDC) 
Cut in voltage: 13.7VDC 
Cut off voltage: 12.8V