Fortunat Mueller, one of ReVision Energy’s resident professional engineers, gave a presentation at the first annual MABEP professional training conference held Jan 12-13 at the Holiday Inn By the Bay.

Fortunat’s presentation was geared towards home energy auditors who want to better understand the economics of solar hot water and in what situations solar hot water can result in tremendous energy savings.

In addition to simply replacing fossil fuels for heating of domestic hot water, a solar hot water system can often enable a home to dramatically reduce the use of a oil burner for water heating – particularly in the summer months, where an oil burner may not need to fire for months at a time.

The above clip shows Fortunat describing why solar hot water works extremely well for domestic hot water, and how boiler upgrades combined with a solar thermal system can dramatically reduce oil consumption.

Clean solar electricity and solar hot water system installed on a home in Porter, Maine

Many people ask us how solar affects a home’s resale value.  The quick answer – solar can be a huge asset when it comes time to sell your home, though there are a variety of considerations you should take into account.

Lower Utility Costs Equal Increased Value

Let’s look at the purely rational economics of a solar energy system.

In the 1998 Evidence of Rational Market Valuations for Home Energy Efficiency report (link, PDF Download) by The Appraisal Journal there’s a section they call the “Rational Market Hypothesis” which describes the relationship of market value to energy savings.

Using fixed (and very conservative) utility costs savings, compared to the cost of the investment, they are able to project an economic value for energy improvements:

Fuel costs may be considered just one of many complex factors affecting the decision to buy a home, but the same can be said about other determinants of home value—from number of bedrooms to the quality of local schools. In a rational, competitive market, the value of energy efficiency, like the value of any other housing characteristic, should reflect its marginal value to home buyers. If home buyers expect stable fuel prices, then the marginal value of energy efficiency in recent years should be $10–$25 for every dollar reduction in annual fuel bills. (emphasis added)

Note that this 1998 report reflects a very different energy situation than what we face today.  We would now argue that the $10–$25 value increase per dollar of reduction in annual fuel bills is only a starting place, as home buyers should NOT expect stable fuel prices for the future.

Over the life of a 30 year mortgage, the fuel cost/utility savings will rise dramatically as fossil fuel heating and energy resources become increasingly scarce.

In addition, purchasing solar electric is particularly attractive right now because solar panel prices have reached record lows, so the payback time is greatly reduced.

Solar as an Attractive House Feature

There is huge emotional value to a solar hot water or solar power installation in addition to the purely logical economic argument.  A renewable energy system makes a strong statement about your commitment to sustainability and the environment, which is increasingly desirable in the marketplace.

In a down market, a solar system may be the differentiator that makes your house attractive to potential buyers.

An recent article on sunpluggers.com featured a subdivision in Northern California that is using solar panels in its homes as a way to differentiate itself.

How successful is it?

“We are the bestselling project in the market right now,” [Hal Woods, president of privately owned CenterStone Communities] says. “All of our Phase 1 and Phase 2 are sold out. We expect to have the project complete in the spring of 2010. A number of other builders are scouting us and looking at the success that we’ve had.”

While the attractiveness of a solar system will vary depending on your location and potential buying pool, it stands to reason that interest and excitement about renewable energy will only grow in the future as the need to move away from fossil fuels becomes more critical, and all things “green” become more mainstream.

Both solar hot water and solar electricity are proven, mature technologies that will provide a payback for you as long as you live in your home, and a more competitive position should you need to sell your home.

Like all investments, the earlier you put solar on your house, the sooner you will reap the rewards.  As we sometimes say, payback doesn’t actually start until the system is installed!

Geoff Sparrow gives a lesson on energy savings at Mast Landing School in Freeport.
View more photos in our gallery

ReVision’s Geoff Sparrow was invited to teach a lesson on solar systems to a third grade class at Mast Landing School in Freeport.

To help illustrate how well solar works – even in winter! – we set up a single evacuated solar hot water tube outside with a temperature gauge attached to it.

We were able to show the kids the heat generated with the tube in the sunshine… 100+ degrees of heating in less than 20 minutes!

We also did an in class activity (see photo, right) that taught the differences between energy saving actions and energy wasting actions.

We always love the opportunity to get into classrooms to talk about renewable energy – kids intuitively “get it” and are eager to take an active role in preserving the planet that will be inherited by them.

If you’re interested in having someone at ReVision speak at your school or nonprofit, just contact us – we’d love to do it.

The Beachmere Inn’s solar electric system generates 5-8% of the Inn’s power needs, and solar hot water has reduced oil use by more than a third!

The Maine Innkeepers Association highlighted The Beachmere Inn in Ogunquit, a certified Maine Environmental Leader in Hospitality, in their most recent newsletter.

The Innkeepers Association also recognized that the inn has been independently family owned and operated for the past 72 years.

We featured The Beachmere Inn last May, when we noted how Beachmere took their green initiatives to the next level by installing 3 active solar hot water systems and a 5 kilowatt solar electric system

In the first two months of service, the solar hot water systems reduced oil consumption by 34%. Their solar hot water systems supply hot water for a 32-room main building and generate domestic hot water in employee housing buildings

The 5kW solar electric system covers 5-8% of the Inn’s total demand. According to their website, by mid 2009 more than 7,800 KW kilowatt hours of clean electricity have been produced by the solar array, eliminating 13,100 lbs of CO2.

Here’s a summary of the energy saving measures that The Beachmere Inn reports on their website:

• Solar Panels have been installed for Thermal Hot water for over 32 rooms as well as in our employee housing building.
• Solar Photovoltaic Panels have been installed for production of 5 – 8% of our energy needs.
• As of June 24, 2009 over 7,800 KW has been produced by solar power a savings of 13,100 Lbs. of Co2.
• Compact Fluorescent bulbs will be in used in all lighting
• Cold water laundry processes are being used to save electricity by eliminating the need to heat hot water for the laundry systems through Ozone technology.
• Energy star appliances are chosen first for any appliance replacement
• High efficiency heating & cooling units were installed in 2008 for Beachmere West
• Additional insulation was installed in the exterior walls and ceiling for better building envelope efficiency in Beachmere West.
• In 2007 we installed efficient, timed irrigation for the lawn and drip irrigation for our planting beds, in 2008 that effort has continued.
• High efficiency Low E Eagle windows are installed in Beachmere West (2008) and were used for all the window & door replacement at Beachmere South (2008) and in the Victorian (2000 – on going).
• Since 2000 we have been replacing old inefficient oil burners with Buderus boilers in the Victorian, South and West buildings.

In addition to their commitment to reducing energy and using energy from clean, renewable sources, The Beachmere Inn has a host of green administrative, cleaning, and building practices.

The Maine Environmental Leader in Hospitality distinction recognizes all of these efforts, and in fact, The Beachmere Inn has “one of the highest totals in certification scoring points.”

Sarah Diment, owner at The Beachmere Inn, feels, “It’s important to take steps towards environmental efficiencies as a smart business move. We know by becoming ‘greener’ we have a direct impact on bettering our environment. Our guests appreciate our efforts and implement some of what they see here in their homes.”

Visit the Maine DEP website to learn more about Maine’s Environmental Leader program, or call 1-800-789-9802.

Congratulations again, Beachmere!

Wall Street Journal journalist Gwendolyn Bounds wrote a story on solar hot water for homeowners – what the technology is like, how it works, and the quite impressive economics of investing in solar hot water.

Rather than tackling the environmental benefits of drastically reducing your oil consumption (since in many homes, a solar hot water system can eliminate boiler usage during summertime), the article focused on the great economic incentives for installing solar hot water.

In Maine, these incentives include a $1000 rebate from Efficiency Maine, as well as a 30% tax credit offered by the federal government.

This economics over environment approach is increasingly common – indeed, it’s consistent with the approach Obama took in the State of the Union – and seems to be steering the minds even of those still skeptical of global warming.

Bounds writes:

In the average home, harnessing the sun’s free energy for daily hot-water needs can be a more practical and affordable bet [than solar electricity]. Water-heating is the third-largest energy expense in most households, after space heating and air-conditioning, according to the U.S. Department of Energy. This year, Hawaii began mandating solar water heaters in most new homes, and cold-weather locales such as New York and Colorado are among the state leaders in installations.

A misconception in Maine is that it is too cold for solar, a fact that is totally untrue! In fact, Maine is far sunnier than Germany, the world-leader in solar installations. Today, a gray January day in Maine, our solar hot water tank at the shop reads a toasty 138 degrees.

Whether your motivations are environmentally or economically driven (or better yet, both!) we appreciate the Wall Street Journal’s efforts in presenting the facts about solar hot water to homeowners.

If you’d like some more information on the technology for yourself, take a look at our solar hot water page or contact us to talk about a free site evaluation at your home or business.

Receiving the Leed for Homes Innovative Project Award
Photo courtesy Bright Built Barn blog

The Bright Built Barn recently won the prestigious 2009 LEED for Homes Innovative Project Award from the U.S. Green Building Council (USGBC).

The award recognizes projects, developers and home builders who have demonstrated leadership in the residential building marketplace.

Phil Kaplan from Kaplan Thompson Architects and Tedd Benson from Bensonwood went to Phoenix, Arizona to accept the award at GreenBuild, the USGBC Annual Conference, this past December.

A write-up of the event is available on the Bright Built Barn blog.

We also received this report of performance of Bright Built Barn’s solar systems, one year later:

I’m happy to report that [BrightBuilt Barn] has exceeded all expectations.

On a subjective level, it has been a joy to live and work in – warm in the winter, cool in the summer, light and airy and lovely to look at all year round. I am also delighted to report that I have not had one minute of trouble with any of the systems – high praise indeed from a guy who hates maintenance and repair, and who has had his share of woes while living in a number of conventionally built houses over the years. The solar systems in the Barn are simple, with few moving parts, and highly reliable – so far, they just work.

BrightBuilt Barn Generated a surplus of more than 5000 KW/hrs in 2008-09

ReVision installed the solar hot water and solar power systems in this innovative, net-zero building.

In its first year, the home’s PV system generation a surplus of 5094 kilowatt-hours – or enough energy to power 5 conventional homes for a month.

Building owner Keith Collins goes on to say that “The Barn does, in fact, power my conventionally built main house (over 15 years old and no paragon of energy efficiency) which sits about 100 feet away, and has produced over 60% of that home’s electrical use.”

You can see real-time system performance of the Bright Built Barn online at brightbuiltbarn.com.

Ben Tipton’s house is smaller than many conventional homes, uses sustainable building materials, and has a PV and solar hot water system

Last year we discussed the construction of a sustainable four-person household built by the Tipton family in Woolwich, Maine.

Completed in October 2008, Ben Tipton recently shared data about his home’s energy performance with us.

Over the course of the year, Ben Tipton reports that his Maine solar power system generated about half of his family’s energy needs, and that his current home uses roughly 2800% less propane for heating and hot water than his previous home.

Here are some details:

Thank you to all that helped on our house. Even if you did not pound a nail your support, encouragement and friendship has been felt all along the way. I now have one year of data and the numbers look really good. No place to go from here but down. I have posted them here and on the blog. We could not have done it without all the help.

Here is the final first year tally…..

• Cost per day: $0.93
• Kw created on site: 1415
• Kw sent out to the grid: 700
• Kw purchased from grid: 2614 (wind and eco-friendly hydro power)
• Yearly Cost: $339.86
• Monthly utility Cost: $28.32
• Total Kw used: 3329
• Propane for cooking: 25 gal
• Wood: 1.5 cords sustainably harvested from the land

So what is a net carbon impact this year??? The only thing that wasn’t made on site or in Maine was the 25 gal of propane. Our last house used over 700 gallons propane, 3 cord of wood and 5000kw. I have to say that these number are impressive and have exceeded my expectations. I owe a huge Thank you to all that helped on this project.

Ben

As part of Ben’s and his family’s commitment to sustainability, they continue to look for ways to reduce their energy consumption and sustainably produce what energy they do use.

You can follow Ben’s story on his blog, Simple Living in Maine.
<h3>From our <a href=”http://www.revisionenergy.com/solar-projects/residential/”>Residential Solar Photo Gallery</a>:</h3>

See more installations on our <a href=”http://www.revisionenergy.com/blog/maine-solar-power-projects/”>Solar Projects Map</a>

The Redfern House in Portland, Maine Achieved a LEED Platinum rating

We were impressed when we heard that the designers of the Redfern House intended to build a home so efficient that it would not need a fossil fuel boiler (no oil nor gas) – even in Maine’s cold climate!

The finished product has exceeded everyone’s expectations, resulting in a Platinum rating from the US Green Building Council’s LEED for Homes Program.

LEED is an acronym for Leadership in Energy and Environmental Design and provides a set of standards for environmentally sustainable construction for new design or renovation.
Located on Victor Road in Portland, Redfern is another super-efficient creation of Catherine and Jonathan Culley of Redfern Properties in Portland.

The Culleys, who are refreshingly passionate about green design, set out to build a home that was both green and affordable.

Catherine explains that “green design doesn’t work if only a few people can afford it.  We wanted to make it so that it’s attainable for more people – so that sustainability is less ‘pie in the sky.”‘

Redfern Properties chose to work with LEED accredited architect Chris Briley to come up with the design of the home. Chris is the founding principal of Green Design Studio, based in Yarmouth.

Coming in at just under 2,000 s.f., the two-story, 3 BR, 2.5B Redfern House is built with resource efficient materials and incorporates low mass, high efficiency electric on-demand hot water heater which is powered by a 2 kilowatt grid-tied solar electric system.

Other features of this home include non toxic paints, cellulose insulation, a detached garage and resource efficient framing. Being located in the downtown region, it’s assessable to public transportation and to Greater Portland’s resources.

Horizon Residential provided consultation on insulation, ventilation, and heating performance. Horizon is also serving as the ‘rater’ for the home in a number of the LEED categories. Other sustainability partners that helped to make this project a success were Cuddledown, Furniturea, Green Designs, Ember Grove, Angela Adams, and Back Cove Yardscaping. Learn more at www.redfernproperties.com.