How Much Power Can You Get from Solar Roofing Panels?

The US Energy Information Agency has estimated that the average U.S. household uses 11,000 Kwh per year or about 30 Kwh per day.
Solar Roofing Panels


Solar Panel Output


How much power can you get from solar roofing panels? This will depend on the efficiency of the panel’s solar photovoltaic (PV) cells in converting solar light energy into electrical energy. The efficiency of a panel is defined by a complicated formula that assumes optimal sun exposure. An 8% efficient panel will require twice the area of a 16% efficient panel to produce the same output.

Although, we often hear of marvelous advances in solar cell technology in the laboratory, the commercial solar cells available today represent the current state of the art. Commercial solar roof panels average 14% efficiency and produce about 14.4-w/sq ft (155 w/sq m). Standard solar roof panel sizes are about 13.5 sq ft., and each panel produces about 200 watts. Wholesale prices for these panels average about $1 per watt.

Is That What You Get?


That is a lot of power if you can utilize it cost effectively. Actual panel power output will depend on your homes geographical location, roof orientation and the chosen solar power system. Is your goal a completely off-grid system that fulfills all your electrical energy needs, or is your goal a grid-tie system to decrease energy bills?

The amount of yearly sunlight available across the continental U.S. averages about 5 hours. The northeast sees only 4.2 hours of full sun, but the southwest enjoys 5.5 hours. Assuming an average of 5 hours of sunlight, a 200-watt panel would produce 1 Kwh/day or 365 Kwh/year. Panels sell for about sunlight.

Solar System Type


For an off-grid system, a Derate Factor must be included that adjusts for the efficiency of an off-grid solar power system in transferring panel output to your home outlet. A common value used is 0.77. Therefore, a 200-watt panel will ultimately produce only 154 watts - 281 Kwh/year.

In a grid-tied solar power system simpler set-up, power goes straight to your utility meter. The power generated from your solar panels goes into the energy grid and offsets the cost of power you use during sunless hours. With this direct connection, a grid-tied system does not suffer from this loss.

Costs


Assuming your home uses the U.S. average of 11000 Kwh/year, an off-grid system would require 40 panels spread over 540 sq ft of optimally oriented roof space. Cost for panels would be about $7800. With an off-grid system, you would need inverters to convert the power to AC and batteries for storage. A complete off-grid system could easily cost $20,000.

A grid-tie system would only require 30 panels. With an inverter to connect to the grid, a grid-tie system would cost about $12,000 and - in theory - totally offset your energy bill. However, a grid-tie system can be scaled down to only offset a portion of utility costs.

According to the US Energy Information Agency, the current average price of electricity is about 11.3 cents per Kwh resulting in a monthly bill of $103.67 or $1,244.04/yr. However, the variation in cost of electricity by location is greater than for the hours of sunlight and may be a more important variable.

The necessity for government incentives probably shows that solar energy simply has not reached the ROIs making them practical for the majority of homeowners.

Komentar

Posting Komentar

Postingan populer dari blog ini

501 Darts Strategies, become A Better Player

The sport of 501 wants abilities and quite a lot of it, darts 501 scoring you want the power to constantly hit excessive numbers each time you step as much as the ouch. The principle factor is to maintain calm and relaxed and belief your sport. A superb apply recreation for hitting excessive numbers is 28; this is a wonderful coaching recreation. It additionally helps loads to be taught the out chart , since you at all times know which quantity to hit subsequent when you've gotten 170 factors left or much less. My opinion is that the out chart is the bible for 501 darts sport. When you memorize it all of your recreation will attain to the next stage and also you don't cease up in the course of the sport calculating, you recognize which quantity to hit subsequent. So when you understand what to throw at, your recreation will float significantly better. A very good rule is: don't get caught up in the very best quantity on the board. If you're sizzling at 15, 16
Baca selengkapnya

How to Build a Homemade Solar Pool Heater

Gambar
Finally, we tend to have has been deemed the most sturdy solar pool heater kit—the GAME SolarPro. On the market as either a curved panel or in contour form, this solar heater will add a bit of vogue to your existing heating system. Created of high-quality plastic composite, the SolarPro is intended to stand up to even the most extreme heats throughout sweltering months. You’ll get two two-foot by 20-foot panels. They'll handle up to one.5 HP pumps. You may want a diverter if you've got a larger pump to avoid injury to the heater tubes. We found the heater does not have U.V. protection, so it breaks down in the extraordinary sun if you reside in an extreme atmosphere. My last solar pool heater only lasted a couple of months, and that i will attest to the importance of durable and flexible materials. As an additional live for longevity, Solar Pool Supply uses pre-compounded polypropylene in these panels. The corporate claims that this manufacturing method separates its solar pane
Baca selengkapnya

Move Over, Fiddle-Leaf Fig-We’re Seeing This Indoor Tree Everywhere

Gambar
spiny black olive tree - It can come as a surprise to many when they discover that an Olea Europaea plant can work as an indoor best time to prune avocado tree tree as well. It has a silverish, light green foliage which provides an elegant aura to your aesthetic. Don't have too many expectations for your plant to bear fruit if it's indoors all the time, but the foliage of the leaves is enough reason to invest in the plant. In a contained space, an Olive tree can grow up to almost 3 meters. If your ceiling is high enough, then it'll work out for you. But because of the height, people usually prefer to invest in the dwarf variety, which only grows up to around 2 meters. How Do You Start A Bonsai Olive Tree? However, don't prune the tree with your bare hands! You can end up hurting yourself. Are black olive trees edible? No, they are not. However, they are poisonous to both humans and animals. 't allow your pets to eat any such fruits. If you have a smaller plant ins
Baca selengkapnya