This article provides helpful tips to determine the MATLAB Link variables accessible within HOMER Grid.
Make sure to save a '.mat' file for one of the timesteps.
Open the .mat file to see all the available variables under Workspace.
Double click on simulation_parameters.
Double-click on grids followed by technical model. You can keep navigating to view all available branches and variables.
The title of the tab/tab header represents the syntax of that particular variable.
See also
Listing of simulation_parameters
Listing of simulation_state