100 series turbo diesel standard twin batteries

I have just bought the car and it has different size batteries.

Sorry I havent explained myself very well. I am going to install a third battery in the back passenger corner with the stuff from the 80 series. It has a regulator and monitor etc. from Piranha but unfortunately the Piranaha 100 series third battery carrier only fits a 10 inch battery and the one I have from the 80 series is 12 inch wont fit down the back of the engine bay

I was hoping I could fit it on the drivers side and use the smaller battery in the third carrier.

I was concerned about the battery on the drivers side which is smaller than the one on the passengers side. It appears it doesn't matter if I replace it with a 620 CCA battery. They aren't balanced and must be of different sizes.

Hi Carl We also use the car for camping with out the van so the extra battery is for the fridge and camp lights e and stuff. The car when I bought it has a winch and driving lights connected to the second battery on the drivers side, so seeing I had all the bits from the old car I would fit them in.

I was told that I couldn't fit a large battery on the drivers side hence I thought there must be a balance reason or something else. It appears its OK so in goes the larger battery and I will fit the smaller one against the fire wall.

Thanks for all your comments its great to be able to run things past others to ensure I dont stuff things up

Hi Guys
Have changed up my mind yet a again and will be up grading the start battery and seperating the two. Will fit the piranha control gear to the second battery as per the old 80 series set up

Thanks for your help

Cheers for Christmas

Have finished the job yesterday and works great.

Started very easily and just as quick with 660CCA battery and have fitted the larger 620CCA as the auxiliary and is working a treat..

Thanks for your assistance and advice. Great result with out the extra weight.