Question : I HAVE had problems
with my Naza Sorento diesel engine since buying it in 2007.
In the last two and half years, two batteries had been replaced with a third
one having a similar problem after four months.
Is this a usual problem with a diesel engine vehicle and if not, how to
The life of a car battery depends on the number of times it is cycled, ie.
charged and discharged.
Under normal circumstances, the alternator should be able to handle all the
electrical load in a car and the battery is used only for starting and providing
power when the vehicle is stationary with the engine switched off.
If your car is eating batteries, then you should look at two areas :
1. Whether the total electrical load in the car is in excess of the current
produced by the alternator (because then the battery will keep getting
discharged and has to be recharged when some of the load is taken off ).
2. If there is a fault in the alternator and it is not producing its rated
Most cars today have alternators producing between 60A and 90A and this is
usually more than sufficient for all the electrical load in the car.