Battery Bank

[Fuzion5]

I just installed an inverter in my fuzion 5 wheel and would like to beef up my batteries. Currently I have two Ac Delcos. ACDM24Dc I have the space to add one more battery. My question is does the new battery need to be the same size/capacity or can I put the biggest 12v I can fit in there?

Thanks

[wingnut60]

Batteries should always be of the same size/capacity/age. If not, the older/weaker/smaller one(s) will draw down the others.
I think most units with inverters have 2 or more batteries dedicated to the inverter only.
Joe