How much energy can the roof of a local Costco generate if covered in solar modules?

Have you ever noticed how much empty roof space we have and asked the question: "I wonder how many solar modules could fit up there and what it could produce in energy?"

Here's an example from a local Costco in Nanaimo BC. Using our design software we were able  to model this array, take into account roof obstructions and setbacks, and include wiring configuration for the hardware selected. This example is based on using Canadian Solar 300 Watt monocrystalline modules racked with an ECOFOOT2 ballasted system in landscape orientation (10 degree pitch, 18.9" inter-row spacing), tied into 3 Phase Outback Proharvest inverters.

The array would look like this and it is 1.265 MW DC in size using 4215 modules. Annual energy production is estimated at 1,392,542 kWh or 1392 MWh [enough to power 126 houses using 11,000 kWh/year]. Such an array would likely cost around $3M. Now you know!

Think of all that commercial and residential roof space and how easily we can power our communities with solar the next time you look up.

Screen Shot 2018-07-19 at 2.45.37 PM.png
Michael Mehta