Overview
System type: Off-grid, battery-based microhydro-electric with PV
System location: Eastsound, Washington
Site head: 110 ft.
Hydro resource flow (dry season): 50 gpm
Hydro resource flow (wet season): 150 gpm
Hydro production (dry season): 400 AC kWh per month avg.
Hydro production (wet season): 700 AC kWh per month avg.
Civil Works
Diversion: 12 ft. long by 2 ft. high by 4 in. thick cedar timber weir
Intake: 1.75 sq. ft. stainless steel Hydro-Shear screen
Penstock: 320 ft., 4 in. diameter HDPE, SDR 11
Powerhouse: 8 by 12 ft., lumber frame, locally milled Douglas fir
Hydro Turbine
Turbine: Harris Hydro, 48 V, permanent magnet, four-nozzle Pelton
Runner diameter: 5 in.
Alternator: Permanent magnet 48 VDC
Rated peak power output: 1.5 kW
Hydro Balance of System
Hydro turbine controller: Trace C40, 40 A
Dump load: 48 VDC water heater element
Inverter: Two OutBack FX3048, 48 VDC nominal input, 120/240 VAC output
Circuit protection: 40 A Airpax DC circuit breaker
System performance metering: TriMetric 2020, FlexNet DC
Engine Generator
Make/model: Honda EU 2000
Energy Storage
Batteries: 8 Interstate UL-16, 360 Ah at 6 V each
Battery bank: 48 VDC nominal, 360 Ah total
Battery/inverter disconnect: 100 A breakers
