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Milne Public Library

System Details

Location	Williamstown, MA   Map
Capacity	2.400 KWdc, 2.160 KWac
Commissioned Date	July 12, 2006
Monitoring Method	Soltrex
Array Azimuth	195°   What's this?
Array Tilt	22°   What's this?

Module Make and Model	Module Wdc	Quantity	Total Capacity (KWdc)
ASE DGF-50-300	300	8	2.400
Inverter Make and Model	Inverter Wac	Quantity	Total Capacity (KWac)
SMA Sunny Boy 2500U	2500	1	2.500

Latest Graph Data

Showing: Plane of array solar irradiance in watts per square meter (w/m2)
		Choose a graph: Power Output Sunlight Custom... Unit Converter

Modeled vs. Measured Energy

PV Energy (kWh)	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Tot
Modeled kWh	154	192	237	277	316	294	313	292	245	197	114	112	2,743
2010 Actual kWh 2010 Ratio to Model	67 0.43	113 0.59	216 0.91	299 1.08	352 1.11	254 0.87	340 1.09	45 0.16	0 0.00				1,686 0.73
2009 Actual kWh 2009 Ratio to Model	18 0.12	79 0.41	251 1.06	277 1.00	280 0.88	279 0.95	300 0.96	296 1.01	266 1.09	134 0.68	132 1.15	61 0.55	2,373 0.87
2008 Actual kWh 2008 Ratio to Model	80 0.52	58 0.30	190 0.80	307 1.11	324 1.03	299 1.02	324 1.03	308 1.06	269 1.10	206 1.04	97 0.85	67 0.60	2,528 0.92
2007 Actual kWh 2007 Ratio to Model	102 0.66	66 0.34	136 0.57	172 0.62	369 1.17	332 1.13	335 1.07	316 1.08	245 1.00	197 1.00	123 1.08	21 0.19	2,412 0.88
2006 Actual kWh 2006 Ratio to Model								591 2.02	188 0.77	163 0.83	109 0.96	83 0.74	1,133 1.18

Energy/Pollution Equivalents

 Since monitoring began, this system has produced 10,132 kWh of electrical energy.

Enough electricity for...		More electricity equivalents
298 Americans' electricity needs for one day.	779,386 hours use of an energy-efficient CFL light bulb.	614,061,576 minutes yakking on a mobile phone.
And offsetting...		More pollution equivalents
9,090 lbs. of CO2 emissions, the main cause of global warming.	9,943 miles worth of CO2 emissions from the average American car.	14 trees cut down, given their capacity to absorb CO2.