AEE » Topics » Equivalent availability factor. This excerpt taken from the AEE 10-Q filed Nov 10, 2008. Equivalent availability factor-A measure that indicates the percentage of time an electric power generating unit was available for service during a period. This excerpt taken from the AEE 10-Q filed Aug 8, 2008.Equivalent availability factor – A measure that indicates the percentage of time an electric power generating unit was available for service during a period. This excerpt taken from the AEE 10-Q filed May 8, 2008.his excerpt taken from the AEE 10-Q filed Aug 8, 2008. Equivalent availability factor – A measure that indicates the percentage of time an electric power generating unit was available for service during a period. This excerpt taken from the AEE 10-Q filed May 8, 2008.