Main System Overview
Type: Off-grid, battery-based PV and wind-electric
Location: Didsbury, Alberta
Solar resource: 4.5 average daily peak sun-hours
PV production: 375 AC KWH per month
Wind resource: 7 mph (3.1 m/s) average wind speed
Wind production: 240 AC KWH per month
Photovoltaics
Modules: 36 Shell SM110, 110 W STC, 35 Vmp, 24 VDC nominal
Array: 18 two-module series strings, 3,960 W STC total, 70 Vmp, 48 VDC nominal
Array installation: Custom mounts installed on south-facing roof, 45–60 degree tilt
Wind Turbines & Towers
Turbines 1 & 2: African Wind Power 3.6
Rotor diameter: 11.8 feet (3.6 m)
Rated energy output: 192 DC KWH per month at 12 mph (5.4 m/s) average
Rated peak power output: 1,000 W at 22 mph (9.8 m/s)
Towers: 80-foot (24 m) and 46-foot (14 m) Rohn 8n, freestanding
Turbine 3: Aeromax Lakota S
Rotor diameter: 7 feet (2.1 m)
Rated energy output: 155 KWH per month at 12 mph (5.4 m/s) average
Rated peak power output: 900 W at 28.8 mph (12.9 m/s)
Tower: 30-foot (9 m) freestanding tower
Energy Storage
Batteries: Eight Rolls/Surrette 6CS-21PS, 6 VDC nominal, 683 AH at 20-hour rate, flooded lead-acid
Battery bank: 48 VDC nominal, 683 AH total
Balance of System
Solar charge controllers: Two OutBack MX60, 60 A, MPPT, 48 VDC nominal input voltage, 48 VDC nominal output voltage
Wind charge controllers: Two AWP controllers with diversion loads, two Morningstar TriStar controllers with diversion loads
Inverters: Two OutBack FX2548T, and one OutBack VFX3648, 48 VDC nominal input, 120 VAC output
System performance metering: Two Bogart Engineering TriMetric, two Xantrex Link 10, one Xantrex TM500, seven analog volt and amp meters
