I currently have a battery under the fixed rear bed of a 530; it is attached to the control unit for a motor mover, also under the bed. The location is close to the wardrobe.
The positive cable from battery to control unit is over 2m long as it runs from the battery, across the caravan to the isolator switch near the under-bed storage hatch, then back across the 'van to the control unit.
I would like to reposition the battery under a front bed box so I get a semblance of acceptable nose weight but then I would need to extend the negative cable also to over 2m.
I read that the battery should generally be no more than 1m from the control unit to avoid voltage drop, but I don't know if this is advisory or essential. The mover works fine at the moment apart from some stop/start moments
If I move the control unit to keep within this 1m restriction, I can reposition the isolation switch.
However, I would then need to recable the motors to the new position of the control unit which would be about 3m away.
Can anyone offer advice or a solution to the predicament?
My plan is perhaps to leave everything in position and try longer cables to the battery just to test the '1m theory', then if it still works I can reposition the battery.
If not then I guess I either leave everything as is or have to recable the motors provided there isn't a length restriction on the cables from them to control unit?
Anyone know?
Thank you kind people

Voltage drop is caused by resistance in the cable. If you used a thicker cable (or two standard ones in parallel) you would be able to get a longer length without any more voltage drop.

Thanks for the reply, I ended up using two lengths of 8AWG power cable from halfords, seems to work just fine
http://www.halfords.com/technology/car-a...-power-cable-5m
Cheerd