Mixing my batteries

[ithet]

How important is it actually to have all batteries in a house bank identical? I am having to replace my bank of three 12v batteries, and due to positioning limitations if I were to stick to all the size of the most constrained one I would have to fit 3x80Ah. However, I could easily fit 1x80Ah + 2x110Ah. Would this really be such a disaster and should I forgoe the extra 60Ah

 

[PaulRainbow]

Don't see a big issue, just wire them as a bank and take the positive from one battery and the negative from the opposite battery.

 

[ithet]

Don't see a big issue, just wire them as a bank and take the positive from one battery and the negative from the opposite battery.

Cheers. Yes my plan was to wire that way.