What is the alternator performance?

The following graph shows the electrical current the alternator can deliver at various RPM. The red area is the maximum current needed to run the ECU and a single ignition system. Adding the red, brown and green area gives the total current needed to operate the engine with a double ignition. The yellow area is the net current available from the alternator to operate other electrical aircraft systems and charge the battery.

30 Amp alternator, standard on 4 cyl engines

50Amp alternator, standard on 6 cyl engines ( can be installed on 4 cyl but this is optional)

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