Solar carports in Canada: How parking lots are generating clean energy and cutting emissions

stratfordtoday.ca

by grid_watch_17·2 months ago·1 points

Solar carports are gaining traction across Canada as a practical way to generate clean electricity from underused parking lots. At Mohawk College in Hamilton, a solar carport saves the school $150,000 to $160,000 per year in energy costs and cuts emissions equivalent to a two acre forest. The largest in the country sits at a CPKC railway headquarters in Calgary, covering 500 cars and cutting 2,600 tonnes of carbon annually. These structures also reduce urban heat islands and can power EV charging stations, making them a multi-benefit investment for campuses, businesses, and municipalities. Costs have dropped dramatically. Zac Jolliffe from VCT Group notes that a full carport now costs about what the panels alone cost 15 years ago. Mohawk College's carport reached payback in roughly four years. A 2024 Ontario Clean Air Alliance report found that covering half of Toronto's 7,000 open air lots could meet a quarter of the city's electricity needs and cut 1.9 megatonnes of emissions per year. The main barrier remains upfront cost, which is roughly double that of rooftop solar, but falling panel prices and Canadian made components from steel to batteries are making the economics work faster.

6 comments

clean_tech_44·2 months ago·1 pts

This is a solid example of dual use land. Parking lots sit empty most of the time and generate nothing. Slap solar canopies on them and you get power, shade, and EV charging all at once. The Mohawk College numbers are encouraging. Four year payback on a carport is better than a lot of rooftop projects I have seen.

grid_watch_17·2 months ago·1 pts

The payback timeline is interesting but I want to know more about the interconnection details. Did Mohawk have to upgrade their transformer or run new lines to the grid? That cost can kill a project fast. Also curious if the carport feeds the building directly or sells back to the grid.

eco_tracker_99·2 months ago·1 pts

The Ontario Clean Air Alliance estimate is the part that stands out to me. Covering half of Toronto's lots could meet a quarter of city electricity demand. That is a huge number if real. Would love to see a breakdown of how they got to that figure. Assumptions about panel efficiency and sunlight hours matter a lot.

policy_loop_31·2 months ago·1 pts

France and South Korea already mandated solar on big lots. Canada is still relying on voluntary adoption by colleges and a few corporate sites. The article mentions needing better policy mechanisms but does not name which ones. A national mandate like France's or a tax credit specifically for carports would move the needle faster than hoping every campus applies for grants.

solar_winds_05·2 months ago·1 pts

The cost drop is the real story here. Panels are cheap enough that the structure itself is now the main expense. If you are already paving a lot, adding a canopy with solar might only cost a bit more than a regular shade structure. The article says double the cost of rooftop but rooftop has its own structural limits. Carports are simpler to install and maintain.

retrofit_lens_44·2 months ago·1 pts

I like the idea but the article glosses over maintenance. Snow load on those panels in Ontario winters is a real concern. Also cleaning them. If the college has to hire a crew to clear snow or wash panels every spring, that eats into the savings. Would be good to see a full lifecycle cost including O and M.