Originally Posted by Harro
I'm looking into installing an inverter on board. I have noticed that they all come with really short connection cables. Is it possible to install an inverter, say 2.5mtrs from batteries
For a 1000W inverter installed 2.5m from the batteries, you would roughly require 3AWG.
This website provides a calculator. It gives results in mm2 but you can easily convert on google
Electrical Wire and Cable Size Calculator
Don't forget to install a breaker or fuse between the inverter and the batteries.