If you don’t think your battery life is all that it should be then;
- Check the battery condition. The capacity of a battery reduces as it gets older. Also do a load test on it, we’ve seen batteries that gave 12.8V off load but that dropped to 11.1V as soon as a load was applied.
- Check the condition of the power cabling. We’ve seen numerous cases where cable joints have degraded over time, overheated, and then caused a significant volt drop at the controller. Measure the voltage directly across the controller B+ & B- terminals whilst under load.
- Is there mechanical drag in the system?
- If all else fails, fit bigger batteries. The controller can only do only one thing with the current it takes from the battery – pass it on to the motors. If the controller wasted any significant power – it would simply get hot and go up in smoke, so if the batteries don’t last – it’s a battery, a motor, a wiring, or a mechanical problem.