The two project phases at Rock Harbor and Windigo developed areas were funded 100% by innovative third-party funding—no upfront costs were paid by NPS.
| Location | Houghton, Michigan |
| System Type | Photovoltaic (PV) hybrid system |
| System Size | 91.8 kW (Rock Harbor), 42.1 kW (Windigo) |
| Installation Cost | $2.6 million (phases 1 and 2) |
| Project Completion | 2014, 2015 |
| Project Savings | $122,400 (estimated) diesel fuel cost savings for Phases 1 and 2 |
| Load Service Area | Rock Harbor and Windigo developed areas |
| Project Champions | Phyllis Green, Betsy Rossini, and Keith Butler |
| FEMP Assistance | Design development, design review, funding assistance, and system performance evaluation |
In 2011, NPS utilized an energy savings performance contract (ESPC) for a two-phase sustainability and solar PV project at isolated locations within Isle Royale National Park. Phase 2 consisted of hybrid PV/diesel power generation at the Rock Harbor and Windigo developed areas. The Rock Harbor and Windigo PV arrays are both paired with diesel generators to handle seasonal loads.
