Overall Homes Powered
What is this number?
Number of homes that could be powered by the solar power produced (kWh) by each Origis Energy project which is then totaled on the home page. This number is based on an average of global home size and electricity use.
How will it be calculated?
The number of homes powered is going to be quite different around the world, based on size and common electrical use.
US home size has fallen a little since the recession, to 201 m2 (2,164 ft2) in 2009. UK house size is relatively small at 76 m2 (818 ft2) while Canadian houses are quite big at 181 m2 (1,948 ft2). For China the data only reflects urban properties, which now average 60 m2 (646 ft2) and have almost doubled in size in the last 15 years.
In the US typical household power consumption is about 11,700 kWh each year. In France it is 6,400 kWh, in the UK it is 4,600 kWh and in China around 1,300 kWh. The global average electricity consumption for households with electricity was roughly 3,500 kWh in 2010.
There are a very complicating set of factors that would go into calculating an accurate global instead of average number. Parameters would include efficiency on both the plant and the home end, type of system installed (trackers versus static), how far the power has to travel on the grid and corresponding grid power losses, the house size, the number of occupants, what is being powered, etc.
The Solar Energy Industries Association (SEIA) has calculated a US national average of 164 homes powered per MW of solar produced (source: http://www.seia.org/about/solar-energy/solar-faq/how-many-homes-can-be-powered-1-megawatt-solar-energy)
Solar Power produced (kWh) / 1000 = MWH * 164 = Number of homes powered
i.e. 10,000 kWh / 1000 = 10 * 164 = 1640 homes
Current Origis Energy solar portfolio using calculations laid out above.