======================================================================== GRIDLINQ V2G CASE STUDY SUMMARY ======================================================================== LIGHTHOUSE POINT RESIDENCES Condominium association, garage + common-area backup — Stamford, Connecticut Common-area backup paid for by resident batteries A 190-unit waterfront association put resident EVs and slip-side tenders behind a common-area microgrid that carries elevators, pumps and hallway lighting through outages. ------------------------------------------------------------------------ PROPERTY PROFILE ------------------------------------------------------------------------ Scale: 190 units, 62 garage bays, 24 slips Service: Two 1200A house services, garage subpanel rebuild V2G enabled: 62 bidirectional garage bays + 24 dock pedestals ------------------------------------------------------------------------ THE STARTING POINT ------------------------------------------------------------------------ - Common-area electricity was the association's fastest-growing expense with no lever to control it. - A diesel generator covered only the fire pump and one elevator, and failed its last two load tests. - Residents were installing chargers ad hoc, threatening garage service capacity. ------------------------------------------------------------------------ THE BUILD ------------------------------------------------------------------------ Phase 1: Garage subpanel rebuild Ad hoc charger runs were replaced with a managed subpanel so every bay shares capacity instead of racing for it. Phase 2: Owner opt-in terms Residents set a reserve floor and receive a monthly common-charge credit for capacity made available to the association. Phase 3: Common-area dispatch Aggregated capacity is dispatched against house-meter peaks before any export, cutting demand charges on both services. Phase 4: Backup mode Elevators, fire pump, hallway lighting and dock power transfer to stored capacity automatically when the grid drops. ------------------------------------------------------------------------ RESULTS ------------------------------------------------------------------------ 34% Common-area demand charge reduction 11 hrs Elevator and life-safety uptime in the last outage $27/mo Average common-charge credit to participating owners ------------------------------------------------------------------------ MEASURED OUTCOMES (BEFORE / AFTER) ------------------------------------------------------------------------ Common-area demand charges Before: $88,000 / yr After: $58,100 / yr Change: -34% Generator load tests failed Before: 2 of 2 After: 0 — generator retired Change: -$9k service Life-safety outage runtime Before: 3 hrs (diesel) After: 11 hrs (stored) Change: +8 hrs Owners enrolled Before: 0 After: 48 of 62 bays Change: 77% opt-in ------------------------------------------------------------------------ PROJECT ECONOMICS ------------------------------------------------------------------------ Annual value: $29,900 avoided demand charges plus retired generator service Capital: $0 special assessment — funded from reserve offset Payback: 21 months against reserve contributions Time to value: 16 weeks including garage subpanel rebuild ------------------------------------------------------------------------ "The generator only ever covered the minimum. Resident batteries now carry the elevators and the hallways, and the board's power bill went down doing it." — Board Treasurer, Lighthouse Point Residences ======================================================================== Want this on your property? Book a free 30-minute assessment: https://gridlinq.dev/#contact Full case study: https://gridlinq.dev/case-studies/lighthouse-point-residences ========================================================================