Connecting a Leisure battery

Hi, I have a 2010 defender 90 and I wanna run power to the back so I can attach it to a trailer. With an Anderson plug. Can I just connect positive and negative from the battery to the back? Will the alternator be able to change the leisure battery once the car battery is full? Or do I need to add something in between to allow it to work? Not sure on the amps but I will check my batterys. Will be putting a inverter and fuses in the trailer. Just wanna know what I need to do the the landy to make it work.

Many thanks

You will need a split charger system to charge the second battery. Look for the ones that sense the main battery is charged before it swaps to the auxiliary.

Remember to fit a nice fat mega fuse fuse where the large cable meets the cars battery, in case any silly twonk starts playing silly buggers!

Hicap phill said:

You will need a split charger system to charge the second battery. Look for the ones that sense the main battery is charged before it swaps to the auxiliary.

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Does this run off the battery? Then will go to the back?

Ive got a T max split charger in my disco plus a 12v-240v invertor in the boot.
Perfect for what you need.

Cheers Kev

Boo71506 said:

Does this run off the battery? Then will go to the back?

Click to expand...

Ebay split charge volt sensiitve for ideas.
Car bat positive to relay then cable to rear.