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By Joe Rand and Ben Hoen
Solar power is blazing hot in a growing number of communities across the U.S. And nowhere is it hotter than in sunny California. California is home to two out of five customer-owned solar systems in the U.S.
As solar panels become common features on homes, they are becoming part of the process of buying and selling real estate.
How does solar power affect home sales?
Research from the Berkeley Lab, Elevate Energy and the Center for Sustainable Energy shows that buyers think solar is a desirable feature, but that they, realtors and appraisers need more help to find and value solar homes.
California is by far the U.S. leader in solar on homes. The Golden State has bountiful sunshine, historically strong state incentives and some of the highest electricity rates in the country. Homeowners in the hot Central Valley can see summertime bills soaring for air conditioning and pool pumps, making solar a very attractive option.
Back in 2004, California Gov. Arnold Schwarzenegger set a goal of 1 million solar roofs by 2018, leading to the creation of the $3.3 billion Go Solar California! Campaign. Progress has been outstanding, with more than 537,000 homes, businesses, schools and farms sporting solar panels, according to data from state agencies.
That much solar means that solar homes are becoming common in some neighborhoods.
To find out how common, we worked with the Center for Sustainable Energy (CSE) to analyze solar homes by zip code and compared that with the number of single family homes in those same zips.
We found that San Diego County is an especially hot spot for solar in California, with 21 of the top 50 zip codes in the state. CSE estimates that San Diego County has 76,239 solar homes as of April of this year—that's one out of eight single family homes.
Top 10 California Zip Codes by Percent of Homes with Solar
Zip codes are limited to those with more than 5,000 single-family homes, in the service territories of Pacific Gas & Electric, Southern California Edison, San Diego Gas & Electric and Los Angeles Department of Waterand Power. Data as of April 30.CPUC, LADWP, U.S. Census
And some neighborhoods have much more. Scripps Ranch, on the north side of town, is 26 percent solar, according to CSE, making it the most solar-saturated zip code in the state. Six zip codes in San Diego county exceed 20 percent. (See an interactive database below of the top 50 solar home zip codes in California).
And as the number of solar homes increases, more solar homes are entering the real estate market.
"We've seen a pretty substantial increase in solar homes sales over the past few years," said J. Daniel Geddis of One Mission Realty in San Diego.
He expects solar home sales to increase over time, due to the time lag between when solar is installed and when the house may be sold. "When people put solar on or do a big improvement they don't sell their house right away," he points out.
High concentrations of solar homes in a neighborhood means that home buyers, realtors and appraisers are dealing with them every day.
Yet the standard tool for finding homes on the market, the Multiple Listing Service or MLS, typically doesn't include information on solar power.
"The average buyer is becoming more educated, but a lot of education still needs to happen," Geddis said. "They see solar panels and think 'that's great' but they don't think about whether it's leased or owned, how much they put out or how old they are."
"The biggest problem is getting information out to buyers as well as to real estate agents, since not all agents understand it either," he added.
Berkeley Lab is working with Elevate Energy and a team of experts from the real estate, appraisal and MLS communities to enable agents to add details about solar systems to MLS databases across the country. This will increase transparency and make it easier for shoppers, realtors and appraisers to find solar homes and properly value solar as a feature.
And solar does indeed have value. A series of reports by Berkeley Lab, including Selling Into The Sun and Appraising into The Sun, have found that solar power that is owned by the homeowner can increase the sales price of homes by an average of $4 per watt or $15,000 for a typical system. Premiums are dependent on the size and age of the solar system, the prevailing price of electricity and the "replacement" cost of similarly sized system in the neighborhood.
Many solar systems are not owned by the homeowner, but rather are owned by a third party, which installs it on the homeowner's roof and leases the system back to the homeowner. This third-party arrangement has the potential to complicate sales, but a recent qualitative survey in San Diego led by Berkeley Lab found that sales of homes with leased systems went smoothly with little to no additional effect on home values.
Geddis thinks ownership makes for an easier sale. "The new owner gets an instant benefit without paying for a loan payment or lease," he said. "With the right marketing, that tends to speed up the time on market and usually demands a higher value."
Solar adds to what he calls "the HGTV effect," after the Home and Garden TV network. "A lot of buyers these days want a move-in ready house," he said. "Solar panels are a bright shiny object—a cool new feature, something the neighbors might not have. It compares to a new remodeled kitchen."
And the savings on the utility bill also helps. "Buyers often don't factor in the cost of living in the home, but solar gives them something to think about," he pointed out.
Experience has shown that solar is a good investment, and is sought after by home buyers. Incorporating it into the standard process of home buying will help highlight and capture that value and make it easier for buyers and sellers to get together.
The U.S. Department of Energy's SunShot Initiative is putting a spotlight on issues around solar and real estate. See research, graphics and more here.
The authors are with the Electricity Markets and Policy Group at Berkeley Lab, which conducts technical, economic and policy analysis of energy topics in the U.S. electricity sector. This article was written to highlight work the Berkeley Lab has done for the Department of Energy's SunShot Initiative on solar and real estate. SunShot is a national collaborative effort to make solar energy cost-competitive with other forms of electricity by the end of the decade.
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By Will Sarni
It is far too easy to view scarcity and poor quality of water as issues solely affecting emerging economies. While the images of women and children fetching water in Africa and a lack of access to water in India are deeply disturbing, this is not the complete picture.
The Past is No Longer a Guide to the Future
We get ever closer to "day zeros" — the point at when municipal water supplies are switched off — and tragedies such as Flint. These are not isolated stories. Instead they are becoming routine, and the public sector and civil society are scrambling to address them. We are seeing "day zeros" in South Africa, India, Australia and elsewhere, and we are now detecting lead contamination in drinking water in cities across the U.S.
"Day zero" is the result of water planning by looking in the rear-view mirror. The past is no longer a guide to the future; water demand has outstripped supplies because we are tied to business-as-usual planning practices and water prices, and this goes hand-in-hand with the inability of the public sector to factor the impacts of climate change into long-term water planning. Lead in drinking water is the result of lead pipe service lines that have not been replaced and in many cases only recently identified by utilities, governments and customers. An estimated 22 million people in the US are potentially using lead water service lines. This aging infrastructure won't repair or replace itself.
One of the most troubling aspects of the global water crisis is that those least able to afford access to water are also the ones who pay a disproportionately high percentage of their income for it. A report by WaterAid revealed that a standard water bill in developed countries is as little as 0.1 percent of the income of someone earning the minimum wage, while in a country like Madagascar a person reliant on a tanker truck for their water supply would spend as much as 45 percent of their daily income on water to get just the recommended daily minimum supply. In Mozambique, families relying on black-market vendors will spend up to 100 times as much on water as those reached by government-subsidized water supplies.
Finally, we need to understand that the discussion of a projected gap between supply and demand is misleading. There is no gap, only poor choices around allocation. The wealthy will have access to water, and the poor will pay more for water of questionable quality. From Flint residents using bottled water and paying high water utility rates, to the poor in South Africa waiting in line for their allocation of water — inequity is everywhere.
Water Inequity Requires Global Action — Now.
These troubling scenarios beg the obvious question: What to do? We do know that ongoing reports on the 'water crisis' are not going to catalyze action to address water scarcity, poor quality, access and affordability. Ensuring the human right to water feels distant at times.
We need to mobilize an ecosystem of stakeholders to be fully engaged in developing and scaling solutions. The public sector, private sector, NGOs, entrepreneurs, investors, academics and civil society must all be engaged in solving water scarcity and quality problems. Each stakeholder brings unique skills, scale and speed of impact (for example, entrepreneurs are fast but lack scale, while conversely the public sector is slow but has scale).
We also urgently need to change how we talk about water. We consistently talk about droughts happening across the globe — but what we are really dealing with is an overallocation of water due to business-as-usual practices and the impacts of climate change.
We need to democratize access to water data and actionable information. Imagine providing anyone with a smartphone the ability to know, on a real-time basis, the quality of their drinking water and actions to secure safe water. Putting this information in the hands of civil society instead or solely relying on centralized regulatory agencies and utilities will change public policies.
Will Sarni is the founder and CEO of Water Foundry.
Note: This post also appears on the World Economic Forum.
Reposted with permission from our media associate Circle of Blue.
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- Mice exposed to nicotine-containing e-cigarette vapor developed lung cancer within a year.
- More research is needed to know what this means for people who vape.
- Other research has shown that vaping can cause damage to lung tissue.
A new study found that long-term exposure to nicotine-containing e-cigarette vapor increases the risk of cancer in mice.
Six months: That's how much time Mexico now has to report on its progress to save the critically endangered vaquita porpoise (Phocoena sinus) from extinction.
It may seem innocuous to flush a Q-tip down the toilet, but those bits of plastic have been washing up on beaches and pose a threat to the birds, turtles and marine life that call those beaches home. The scourge of plastic "nurdles," as they are called, has pushed Scotland to implement a complete ban on the sale and manufacture of plastic-stemmed cotton swabs, as the BBC reported.
By Tim Radford
Scientists in the U.S. have added a new dimension to the growing hazard of extreme heat. As global average temperatures rise, so do the frequency, duration and intensity of heatwaves.
Oscar-award winning actress and long-time political activist Jane Fonda was arrested on the steps of Capitol Hill in Washington, DC on Friday for peacefully protesting the U.S. government's inaction in combating the climate crisis, according to the AP.
By Caroline Hickman
I'm up late at night worrying that my baby brothers may die from global warming and other threats to humanity – please can you put my mind at rest? – Sophie, aged 17, East Sussex, UK