[DNK76]

The charger is not a DC source,
maybe 5 to 10A is the DC current needed to replace the battery after it has been completely disconnected,
Each high power charger is a pulse converter
to obtain 100A DC requires a huge amount of capacitors on the PCB,
That's why you need a battery connected to the system it is
the largest condenser.
ISTA P in fserii and G program very quickly almost all drivers
At the same time in blocks, therefore, the need for such power
Of course, with several hours of diagnostics you can reduce the voltage to 14V,
especially as ignition off most of the time,
but for programming I do not recommend
See how the voltage drops
at 30A
40A,
60A (probably about 13.8V)
80A,
100A is generally about 13V on the termnal in the car,
I often check,
plug and turn on everything and check the voltage as it falls,
The charger set to 14.8 gives you 14.4V - 14.6V at 10-15A
Ignition ON with very well equipped series 5, 7 needs ignition of about 20A-30A and it gives 14.3V
fall depends on the terminal construction in bmw and cables in the charger, terminals,
therefore, different chargers are different,
It would be dangerous to have the charger hold 14.8V at the terminal in the car, as the alternator does, keeping the voltage constant required by the BSD system.
Only if the ignition switched off will increase to 14.5V -14.7V depending on the battery charge