Odium wrote:Lord Skimper wrote:
Cost isn't much more, about $4500 Canadian. For solar shingles. They last 40+ years and the new ones have a non stick coating that repels water and snow and dirt etc.... As for having them wired in, saves you money in the form of electricity.
I'm not sure where you are getting the 4500 from. While I didn't spend much time looking, the costs I found were in the $40,000+ range for an average house, at 3000 sq ft I'm a bit over average roof size. The various quotes I got for redoing my asphalt shingles ranged from 6-10,000. Given that my roof has 6-20" of snow on it from mid October to mid April on average, and we only get 7-8 hours of daylight in the winter, I think it's safe to assume it would provide a negligible amount of power for 5 months of the year. Now in the summer we get 16-18 hrs of daylight, but that's when I use the least power. If the system lowers my power consumption to zero 7 months of the year, Id save around $22,500 over 25 years. But it would cost me over $32000 more to put it on than a conventional roof. Might make sense elsewhere, but useless waste of money up here
Your prices are crazy. Panels average $200. Shingles much less. Most of your $40,000 is profit in someone's pocket. 10,000 sqft costs about $14,000, including batteries and electrician costs. Installation is extra but if you are paying anything over $3-5,000 you need to go back to negotiator school. minus the cost of asphalt shingles and their installation twice. Added snow fall is either cleared with the aqua shield coatings, used on higher end car lights now, or with a heated roof system, the kind of system that is used to clear walkways and driveways, they auto turn on and melt snow before it collects. With your solar and a storage medium, batteries or MDI, you are set day and night.
Also solar panels run off of UV light as well clouds do not prevent panels from working, even indirect light is fine, which is why you cover your whole roof, not just the sunny side. Bright direct is better, but not mandatory.
Also remember most of your electrical costs, in Alberta, is administrative costs. Transmission and office costs. The electricity is dirt cheap here. $0.033 /KWH. In Ontario they are crazy $0.23+ /KWH. But even more crazy is their Eco Energy 20 year contracts that will buy the first 10 KWH at $0.34 / KWH. There you just feed everything you make back into the grid no batteries connected to the solar, just charge your backup batteries off the grid.
You can of course use batteries with the grid. For emergencies blackouts or brown out protection.
In the cities even street lights will power your solar panels.