Eclipse 500 System Manual page 246

Section 10. Electrical
Less than 10 volts at any time
When generator power is available after engine start
EXTERNAL POWER LIGHT
The green external power light on the electrical panel is on if the following conditions
are met:
External power is plugged in.
Power is the correct polarity and the voltage is between 24 and 29 volts.
NOTE:
Illumination of the green external power light does not indicate that external
power is being used; both battery switches must be in the ON position.
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Copyright © — Eclipse Aviation Corporation
Eclipse 5OO Systems Manual
Version 2.0 April 2007