Location: San Diego, California
Solar resource: 5.7 average daily peak sun-hours
Average monthly production: 250 AC KWH
Utility electricity offset annually: More than 100%
Modules: 33 Uni-Solar US64, 64 W STC, 16.5 Vmp
Array: Three 11-module series strings, 2,112 W STC total, 181.5 Vmp
Array installation: Two Home Energy Systems mounts on south-facing roof; one on north-facing roof and one on flat garage roof; all oriented south with a 22-degree tilt
Inverter: Sunny Boy 1800U, 1.8 KW rated output, 400 VDC maximum input, 156–350 VDC MPPT range, 120 VAC output
System performance metering: Inverter display and utility KWH meter
System type: Batch (integral passive solar-assisted)
Hot water produced annually: 50%
Collector: Servamatic, rooftop batch heater, 40 gal.
Collector installation: Mounted on south-facing roof at 22-degree tilt
Backup DHW tank: A.O. Smith, gas-fired, FGR 40 242, 50 gal.