The alternator will provide a continuous source of power up to 20 amps without loading the engine anymore than a vacuum pump.
The B&C Specialty Standby Alternator system is comprised of major components.
BC203-2D Alternator controller
STBY ALT master switch
Part # VA-BC425
This system is available for purchase directly from Freedom Aviation and should take about 10 hours to install. The STC and FAA Approved Flight Manual Supplement make certification of this system quick and easy.