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Table 4 Comparison of rooftop-mounted solar energy potential with estimate of Guelph’s 2005 energy use

From: Community-scale assessment of rooftop-mounted solar energy potential with meteorological, atlas, and GIS data: a case study of Guelph, Ontario (Canada)

Demand (GWh[e]) and relative potential for Guelph, 2005 City of Guelph Manufacturer and model
  SunPower E19/320 Vaillant VFK 150
Total energy 6,034a  
 First scenario - horizontal plane assumption
   Interactive maps of Canada (%)   28.3 101.5
   mL&J real sky B + D (%)   24.8 88.8
 Second scenario - roof categorization assumption
   mL&J real sky B + D (A and B) (%)   49.0 175.4
Heat 2,661a  
 First scenario
   National Atlas of Canada (%)   N/A 230
   mL&J real sky B + D (%)   N/A 201
 Second scenario
   mL&J real sky B + D (A and B)   N/A 398
Electricity 1,630a  
 First scenario
   National Atlas of Canada (%)   104.9 N/A
   mL&J real sky B + D (%)   91.8 N/A
 Second scenario
   mL&J real sky B + D (A and B) (%)   181.3 N/A
  1. aGarforth International LLC[27]; (A) and (B) refer to the rooftop categorizations; N/A, not applicable.