Projects The Solar Stone has completed many projects including Grid-Tie, Grid-Tie with Battery Backup, Off-Grid, Solar Thermal and Remote Applications. Select the project below to learn more. See All AllDirect Grid Tie SystemsGrid Tie w/Battery BackupOff-Grid Sandpoint Charter SchoolGrid Tie w/Battery Backup Liberty Lake Police StationGrid Tie w/Battery Backup Rose LakeOff-Grid Grid Tie WashingtonDirect Grid Tie Systems Northern Idaho Grid TieDirect Grid Tie Systems GreenstoneDirect Grid Tie Systems Coeur D’Alene Grid TieDirect Grid Tie Systems Cougar Gulch, Coeur D’AleneDirect Grid Tie Systems Idaho Grid TieDirect Grid Tie Systems