I'm looking to wire up an off-grid system. What I'm stuck on is battery placement.
The likelihood is my batteries will need to be quite far apart (almost 2 metres). My question is how does this relate to the wire thickness I should use to add components to the circuit?
To flesh this out in case I'm not being clear: if I only use one battery, the fusebox can be 50cm away from both positive and negative terminal. Using a certain wire thickness, this could result in an X% voltage drop since the return distance of the current is 1m.
If I use the batteries in parallel, the positive terminal is now 50cm from the fusebox, whilst the negative terminal (on the other battery) is now 1.5m away. Does this means the return distance is now 2m, resulting in a 2X% voltage drop? Or does it include the parallel connections, meaning it's 3.5m or 5m?
Any help greatly appreciated!