Linking two batteries together

[dave1]

I've got 2 brand new leisure batteries and wanting to join together. Has anybody else done this.

When it comes to charging, do I put the positive connector on one battery and the negative on the other battery.

 

[ched999uk]

In an ideal world connect -ve to -ve and +ve to +ve on each battery. Then to charge connect the charger to the +ve of one battery and the -ve to the other. Same with your pumps reels etc. That way you spread the load equally between the batteries. If you just connect the charger and pumps, reels onto one battery you will be putting more strain on that battery as the linking cables have a small resistance.

 

[spruce]

I've got 2 brand new leisure batteries and wanting to join together. Has anybody else done this.

When it comes to charging, do I put the positive connector on one battery and the negative on the other battery.

As per @ched999uk

The other thing is that the second battery should be the exact same amp hour rating and the same age as the original.

If not, the newer battery will discharge in the older battery and both will end up flat.

https://caravanchronicles.com/guides/how-to-connect-two-batteries-in-parallel/

 

[P4dstar]

As per @ched999uk

The other thing is that the second battery should be the exact same amp hour rating and the same age as the original.

If not, the newer battery will discharge in the older battery and both will end up flat.

https://caravanchronicles.com/guides/how-to-connect-two-batteries-in-parallel/

I asked the question of ionics. I have a Thermopure hotbox system from them connected to a delivery only system. This is connected to 2 x 110 (ish) AH batteries. On my new Thermopure system they are putting one 150AH battery. They say their experience tells them this is the better way of doing things. I imagine it’s like buying a washer dryer, they break more because there’s more to go wrong. My hot system from Grippa is not on a hotbox it’s built in but it has 2 parallel batteries also.

 

[spruce]

I asked the question of ionics. I have a Thermopure hotbox system from them connected to a delivery only system. This is connected to 2 x 110 (ish) AH batteries. On my new Thermopure system they are putting one 150AH battery. They say their experience tells them this is the better way of doing things. I imagine it’s like buying a washer dryer, they break more because there’s more to go wrong. My hot system from Grippa is not on a hotbox it’s built in but it has 2 parallel batteries also.

I would always consider a larger single battery rather than 2 linked together. It just makes more sense to me.

 

[P4dstar]

I would always consider a larger single battery rather than 2 linked together. It just makes more sense to me.

can’t go wrong with the motto KISS. “Keep it simple stupid”

 

[Pjj]

I asked the question of ionics. I have a Thermopure hotbox system from them connected to a delivery only system. This is connected to 2 x 110 (ish) AH batteries. On my new Thermopure system they are putting one 150AH battery. They say their experience tells them this is the better way of doing things. I imagine it’s like buying a washer dryer, they break more because there’s more to go wrong. My hot system from Grippa is not on a hotbox it’s built in but it has 2 parallel batteries also.

Is the 150 amp battery a lithium one ? I have one of them instead of the 2x 180 gel AGM batteries I used ti have so much better and you can pick it up with your little finger the AGM ones I don’t know what they weighed but I struggle to pick them up and ime no wimp

 

[P4dstar]

Is the 150 amp battery a lithium one ? I have one of them instead of the 2x 180 gel AGM batteries I used ti have so much better and you can pick it up with your little finger the AGM ones I don’t know what they weighed but I struggle to pick them up and ime no wimp

I’ve no idea. Vans due in tomorrow, probably won’t collect it until the following Monday but I’ll be able to share then.

 

[spruce]

can’t go wrong with the motto KISS. “Keep it simple stupid”

I prefer "keep is simple, sir!"