These systems create a huge amount of braking force (up to 1200PSI) and it is very important that you do not ‘over-brake’ the trailer, causing premature failure of the brake calipers. This is caused when the brake controller is set with too much gain (voltage output too high) and the brakes on the trailer not only attempt to stop the actual trailer mass, but they also brake a portion of the tow vehicle. This is outside the design specification of the calipers and rotors fitted to your trailer and should be avoided at all costs.
Remember that most tow vehicles are already designed to brake up to 750KG (the Australian design rules maximum for a non-braked trailer) so the trailer brakes should only ever be braking their own weight less this amount.
See below example. Assume our tow vehicle and boat weigh the same and our tow vehicle has a 750kg unbraked tow rating.