The inputs on the Losses page account for potential sources of energy loss that area not accounted for by the marine energy performance model.

The default 2% transmission loss and a 5% array/device downtime loss are based on the reference model project.

Total Losses

SAM applies the total loss to the annual energy production of the system. The total loss percentage is the sum of the different loss categories.

System Availability

System availability losses are reductions in the system's output due to operational requirements such as maintenance down time or other situations that prevent the system from operating as designed.

Notes.
 
To model curtailment, or forced outages or reduction in power output required by the grid operator, use the inputs on the Grid Limits page. The Grid Limits page is not available for all performance models.
 
For the PV Battery model, battery dispatch is affected by the system availability losses. For the PVWatts Battery, Custom Generation Profile - Battery, and Standalone Battery battery dispatch ignores the system availability losses.

To edit the system availability losses, click Edit losses.

The Edit Losses window allows you to define loss factors as follows:

•Constant loss is a single loss factor that applies to the system's entire output. You can use this to model an availability factor.

•Time series  losses apply to specific time steps.

SAM reduces the system's output in each time step by the loss percentage that you specify for that time step. For a given time step, a loss of zero would result in no adjustment. A loss of 5% would reduce the output by 5%, and a loss of -5% would increase the output value by 5%.