however, that running some bulbs (such as for high power headlights) can be
a problem because the lament has to be very thin. Some commercial (24 V)
vehicles actually use a 12 V supply to the headlights for this reason. To date
the dual voltage system has not been used on production vehicles.
5.5.2 Charge balance calculation
The charge balance or energy balance of a charging system is used to ensure
that the alternator can cope with all the demands placed on it and still charge
the battery. The following steps help to indicate the size of alternator required
or to check if the one tted to a vehicle is suitable.
As a worked example, ...
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