How well-positioned is your roof? It's a timely question for home and business owners because a roof outfitted with solar panels can generate enough clean electricity to provide power for your building and recharge your electric vehicles. And if it's located in Ontario, it can also turn a profit.
Energy self-sufficiency is not pie-in-the sky speculation. It is prevalent in Europe, specifically in Germany, and it seems to be moving closer to urban Canada with every passing month. But Montreal might have to take a back seat to Toronto on this one. More on that later.
For the moment, we'll go to the leafy suburb of Hudson, where the Alstonvale Net Zero Energy House is being built, as part of the federal government's EQuilbrium initiative to showcase carbon-neutral sustainable housing. Incorporated into the home's roof is a photovoltaic/thermal system that should generate about 8,700 kilowatts of energy annually, enough to meet the needs of a household of four as well as charge the family's low-speed electric car.
The home, which should be ready to receive its family this summer, will be monitored and its energy patterns scrutinized by Hydro-Québec, CMHC,
Natural Resources Canada and Concordia University, said architect Sevag Pogharian, who discussed the home's attributes and challenges at the Plug-In Hybrid and Electric Vehicles conference in Montreal.
Meanwhile, in an industrial sector of Toronto,
Solera Sustainable Energies Co. is preparing to install solar panels on the roof of client Toronto Electric. Those panels should generate sufficient energy to support a fleet of 35 small highway-capable electric vehicles each travelling about 20,000 kilometres a year for the next 25 years, Solera president Leonard Allen told the conference.
Buildings consume between 30 per cent and 40 per cent of all energy produced and are major contributors to human-induced global warming, said Solera who, like Pogharian, contends that roofs could be - and should be - power plants of green energy.
We shouldn't have to review the environmental sense of green energy; it's as clear as ice-melt. But quickly: every kilowatt of solar photovoltaic installed means that 17 tonnes of coal doesn't have to be burned and that 30 tonnes of carbon dioxide isn't being emitted into the atmosphere.
What is still subject to debate in some quarters, alas, is the economic sense of green energy and green buildings. That is still going on because mainstream economists don't yet factor in the true cost of carbon or clean water or other finite resources while the mantra of the Western world is economic growth and the consumerism that it implies.
Pogharian has given many presentations about the super-smart building in Hudson. He said he is always asked about the "
payback period" for the home and the question: "How long will it take to cover the investment?" always comes from a man.
A man who, Pogharian figures, never calculated the payback period of his big flat-screen TV or his power boat, or keeping a mistress, the latter two items having "a pay-back time approaching infinity."
"We are just hardwired to overestimate the value of present pleasures and underestimate the odds of our future pains," he said.
Currently,
the cost of building a net-zero energy home is now about 20 per cent more than building a conventional home, he said. Those "incremental" costs will be dropping fast as solar technologies become refined and production costs decrease.
One sure method of dropping the cost and payback time of structures like Pogharian's and Toronto Electric's is building them in Ontario.
If the Hudson home had been built in a Toronto suburb, it would be generating revenue as soon as the sun shone on it, under provisions of
Ontario's Green Energy Act that came into effect last week.
Ontario is the first jurisdiction in
North America to have a so-called feed-in-tariff which pays producers of green energy - including solar and wind - a guaranteed premium for the power they produce. One can sell self-generated solar power to the grid at a high rate and then buy back the power one needs at much lower rate.
In Quebec, that same energy producer could sell power to the grid but would receive only a credit equivalent to the basic power rate. If you export to the grid more than you use, there is no financial benefit to you.
Had Pogharian built the Hudson house in Ontario, it would have had more solar panels along with a shorter payback period.
"I would have made the house a net exporter of energy and not stopped at zero," Pogharian said.
At Toronto Electric, "the feed-in-tariff is the enabler to making solar rooftop work financially," said Allen who pegged the cost of the project at about $750,000.
"It creates a significant revenue stream" because the energy generated by the roof will be sold to the Ontario grid for 71.3 cents per kw/hr to the grid and returned to
Toronto Electric at a rate of about 11 cents, he said.
So, currently, the best position for your solar roof is facing south and in
Ontario.