Lifetime

See also: 

Used only when conducting transmission modeling as part of full energy system optimization. Transmission modeling is enabled by editing the Transmission Networks setting in the Settings: Optimization screen.

This variable is specified for each Transmission line ().  Use it to specify transmission line operational lifetimes measured in years. It is used to retire both exogenously and endogenously built lines. The default value is 30 years.

As with other variables used in optimization modeling, this variable is only available for optimized scenarios.  It is not visible in Current Accounts.