Mother Earth Living

Wiser Living

Finding a natural solution

Sustainable Tennessee Farmhouse Takes Advantage of Solar Power and Renewable Energy

3/26/2010 12:09:35 PM

Tags: sustainable tennessee farmhouse, LEED Platinum, solar power, photovoltaic panels, solar system, geothermal, geothermal heating and cooling, PV panels, solar panels, LEED, green home, building a green home, sustainable architecture, tennessee, sustainable farmhouse

Editor's Note: John Patrick, Rebecca Selove's husband, contributes to Rebecca's blog series.

Our home was built for solar power. Built on the hillside facing due south, this home was designed to collect solar energy in many ways.

drawing of south-facing sustainable home
The home faces south and allows for maximum sunshine. Drawing By Mark West.

The farmhouse's roof was pitched to allow full sun for passive solar heating in the upper and lower levels during the late fall, winter and early spring. Large windows on the south side allow sunlight in to warm the dark tiles and stained cement floors. In the late spring, summer and early fall, when keeping cool is a priority, that same pitched roof shades those windows and floors.

We also tilted the roof to match the middle Tennessee latitude for maximum solar exposure for our installed solar panels. A photovoltaic system is beginning to make more environmental and economic sense because it provides renewable energy for the home and will probably decrease our electric bill by 60 percent. Our 5.17-kilowatt array connects to the grid so that when we are collecting more solar energy than we are using, the excess energy goes on to the grid for use by others—probably by our neighbors. With incentives from the Tennessee Valley Authority, our excess energy will earn 12 cents more than the prevailing rate of approximately 9 cents per kilowatt. Currently, that means we’ll receive 21 cents for every excess kilowatt we produce.

solar panels
Solar panels provide electricity to the home and solar thermal panels heat the home's water. Photo Courtesy John Patrick.

Tennessee Valley Authority values stable sources of renewable energy and guarantees this contract for 10 years. At this rate, the estimated payoff for our system will be 10-12 years. We think that in a carbon-restrained world with carbon taxes or a cap-and-trade system, those rates will increase and reduce that payoff time. 

Two solar thermal panels to provide our hot water. Feeding into an 80-gallon tank that will retain hot water for 36 hours, this system will potentially cut our hot water electricity usage in half, which for an average household, is the largest annual use of electricity. For those cloudy winter days when sunshine is at a minimum, an element within the tank will heat the water. The hot water system will get a boost from our geothermal heating and cooling system. That system takes advantage of the constant temperature of the earth to heat and cool our home, and in the summer it provides us free hot water by the use of its de-superheater option that uses the hot air to heat our water. In total, with the Tennessee Valley Authority payback, the de-superheater and the solar panels, we should have a payback period of 10-12 years—again, that is at today’s rates.

Although economics is integral to the ultimate wide-spread acceptance of solar power, shifting to renewable power is a move we are choosing to make to lessen the impacts of climate change. We hope our home can be an example of what is possible.



Related Content

The Future of Solar Power: Few Subsidies, But Four New Federal Projects

Without federal subsidies, the future of solar power looks grim. Fortunately, the Obama administrati...

Get Paper Towels Out of Your Life for Good

Replacing paper towels with rags is a super simple step toward sustainable living. Follow these simp...

How Our Sustainable Tennessee Farmhouse Began

This is the first of a series of blogs about construction of a LEED Platinum-certified home on an or...

Wind and Solar Energy Grow 30 to 40 Percent in 2010, Report Shows

Wind power grew by 30 percent and solar power grew by 40 percent in 2010, according to a new report.

Content Tools
RSS




Post a comment below.

 



Subscribe today and save 50%

First Name: *
Last Name: *
Address: *
City: *
State/Province: *
Zip/Postal Code:*
Country:
Email:*
(* indicates a required item)
Canadian subs: 1 year, (includes postage & GST). Foreign subs: 1 year, . U.S. funds.
Canadian Subscribers - Click Here
Non US and Canadian Subscribers - Click Here

Subscribe to Mother Earth Living!

Welcome to Mother Earth Living, the authority on green lifestyle and design. Each issue of Mother Earth Living features advice to create naturally healthy and nontoxic homes for yourself and your loved ones. With Mother Earth Living by your side, you’ll discover all the best and latest information you want on choosing natural remedies and practicing preventive medicine; cooking with a nutritious and whole-food focus; creating a nontoxic home; and gardening for food, wellness and enjoyment. Subscribe to Mother Earth Living today to get inspired on the art of living wisely and living well.

Save Money & a Few Trees!

Pay now with a credit card and take advantage of our earth-friendly automatic renewal savings plan. You’ll save an additional $5 and get six issues of Mother Earth Living for just $14.95! (Offer valid only in the U.S.)

Or, choose Bill Me and pay just $19.95.