Tag Archives: Residential Rooftop Solar

Boosting battery storage can lower utility bills — study

By Daniel Cusick, Environment & Energy Publishing

Adding energy storage to an already robust solar market in California’s multifamily housing sector could lead to significant utility bill savings for building owners and tenants, new findings from the Clean Energy Group and partner organizations show.

In a new 50-page analysis released last week, CEG, along with the California Housing Partnership Corp. and Center for Sustainable Energy, found that lower-income apartments provide a ripe opportunity for developers to improve the economics of solar by adding battery storage to such apartment buildings. “It essentially creates a new pool of savings, so if you were only doing efficiency and only doing solar, you’d get some savings. But if you add storage, you get significantly more,” said Lewis Milford, CEG’s president and a co-author of the report, “Closing the California Clean Energy Divide.”

The authors say the findings are especially relevant in light of California’s recent passage into law of the Multifamily Affordable Housing Solar Roofs Program, a $1 billion investment program to deploy solar technologies in affordable multifamily rental housing that is expected to extend the benefits of solar power to hundreds of thousands of lower-income Californians.

But solar access by itself isn’t enough, the report says. In fact, shifting policies around rooftop solar in some states, including California, could place owners and tenants of low-income housing at greater risk because the benefits of solar are highly dependent on strong net-metering programs. A number of states have reformed net metering in ways that sharply curtail the benefits of solar, resulting in higher, not lower, electricity bills.

Battery storage effectively reduces that risk, the authors say, by eliminating most of the demand-related charges that utilities pass along to owners of distributed energy systems like rooftop solar.

“Because batteries empower owners of solar PV systems to take control of the energy they produce and when they consume it, storage can deliver deeper cost reductions that can be shared among affordable housing owners, developers, and tenants,” the report states. And unlike stand-alone solar projects, which do little to offset demand-related charges, a properly sized solar system with storage can eliminate nearly all electricity expenses, resulting in an annual electric utility bill of less than a few hundred dollars in some cases.

Read full article from E&E

Related Article: Energy Storage Could Break Low Income Rooftop Solar Bottleneck (CleanTechnica)

Santa Monica Mandates Rooftop Solar On New Buildings

San Francisco recently made headlines for establishing an ordinance requiring solar installations on new buildings, and now, yet another California city has passed similar legislation.

The Santa Monica City Council has approved an ordinance mandating rooftop solar systems on all new residential and commercial buildings in the city. And although San Francisco’s ordinance goes into effect in 2017, Santa Monica’s kicks off in fewer than 30 days, on May 26. Other cities in the Sunshine State that created such solar mandates include Sebastopol and Lancaster, which passed their ordinances in 2013.

According to the Santa Monica government, the ordinance capitalizes on market trends in the solar industry. With the cost of solar installations continuing to decrease, Santa Monica residents and developers will now generate renewable energy, improve the value of their property, and contribute to the city’s long-range goals for energy and climate mitigation, including reaching carbon neutrality by 2050.

Read full article from Solar Industry

 

San Francisco just became the first big US city to require solar panels on new buildings

By Biz Carson, Business Insider

San Francisco may be known for its fog, but the city wants to turn the sunny days it does get into power for its buildings.

The San Francisco Board of Supervisors on Tuesday unanimously passed legislation (PDF) that would require new construction that is shorter than 10 floors to install solar panels or solar water heaters on top of both new residential and commercial buildings.

According to California law, all new buildings with 10 floors or less must have at least 15% of their rooftops designated as solar ready — meaning not in the shade. San Francisco now requires those buildings to actually use it for solar panels.

The new rules also make San Francisco the first major US city to mandate solar panels on new construction, although other California towns like Lancaster and Sebastopol have instituted similar laws. The new rules don’t go into effect until January 1, 2017, after which any construction that falls under the state law to include solar-ready space will have to actually install it.

Read full article from Business Insider

Related Articles:
San Francisco Requires New Buildings To Install Solar Panels (NPR)
San Francisco Solar Map About To Get Way More Crowded With New Rooftop Law (CleanTechnica)

 

Study: California could get 74% of power from rooftop solar

By Sammy Roth, The Desert Sun

Rooftop solar panels could meet three-quarters of California’s electricity needs and about 40 percent of the country’s electricity needs, according to a new study from the National Renewable Energy Laboratory.

Researchers at the federally funded lab, which is based in Colorado, had estimated in 2008 that rooftop solar could generate 800 terawatt-hours of electricity per year, supplying about 21 percent of the country’s current electricity demand. Now they’ve upped their estimate to 39 percent, in an analysis sure to be embraced by clean-energy advocates who see solar power as critical to fighting climate change.

It’s unlikely the United States will tap all the sunlight at its disposal, at least not soon. The study focuses only on rooftop solar’s theoretical potential, without considering which systems would make financial sense for the owners of homes, businesses and other commercial buildings. Dramatically scaling up rooftop solar would also require big investments in the electric grid, which was built to accommodate large, centralized power plants.

The research lab was particularly bullish on California, which has a lot of sunlight, many large buildings and low per-person energy use. Researchers estimated that California could generate 74 percent of its electricity from rooftop solar — far more than any other state. The next-highest percentages came from the six states of New England, which get relatively little sunlight but don’t use much energy to begin with. Unsurprisingly, large, sunny states such as California, Texas and Florida have the greatest overall generation potential.

Read full article in the Desert Sun

 

California’s Distributed Energy Future

GTM Research has established itself as the premier source of information on solar industry trends and developments in the United States. It’s instructive that from that perspective, they chose to organize a conference focusing on a single state, California.

We who participate in the solar industry here have recognized the state as a leader, but the less patronizing among us also recognize that the magnitude of this lead is only temporary. If solar is to realize its potential as one means of reducing environmental damage while reducing future customer utility costs, then other parts of the United States need to catch up (and as GTM’s latest data for 2015 shows, they are).

Nonetheless, as GTM Research Senior Vice President Shayle Kann observed in his opening keynote at GTM’s California Distributed Energy Future conference in San Francisco, California remains the epicenter of next generation distributed energy (DE) regulation and is at the forefront of the shift toward distributed energy in the U.S. And (I would add) what happens in California doesn’t always stay in California. Hence the conference to examine California’s transition to a distributed energy future and consider what’s working and what isn’t.

The discussions at the conference covered a variety of issues confronting the state. Here is an overview of the key themes coming out of the discussions, and the insights shared by the different speakers:

The strongest and most frequently recurring theme was that of the interaction of Distributed Energy Resources (DERs, essentially distributed solar PV) and the electrical grid. This issue has numerous dimensions, and subsequent “fireside chats” helped highlight some of these.

Appropriately the first discussion was with a Senior Vice President from Pacific Gas & Electric (PG&E), California’s largest investor-owned utility (IOU) and the utility with more connected PV capacity than any other in the United States. Issues were fairly raised: e.g., how should rates be structured to fairly compensate the value of Grid access received by the customer, how does PG&E envision an environment of growing Community Choice Aggregation (CCA) systems and how is the Grid managed for reliability. Unfortunately, the moderator for this session let the PG&E representative off with the stock, PR answers: “we have to make changes in our rate structures”, “they can work, note how long Marin (Clean Energy, 2010) and Sonoma (Clean Power, 2014) have been in service”, and “we need to build in robustness.”

Ah well, at least subsequent chats returned to DER issues in more depth. DERs can lower costs for Grid operators / managers; experiments were cited by both Southern California Edison (SCE) and San Diego Gas & Electric (SDG&E) involving combinations of storage and DERs. Time of Use (TOU) pricing is coming, and 150 studies worldwide on this issue indicate that customers like this. But there is just too little experience with California’s residential customers while the customers themselves have too little information on which to make decisions as to costs versus savings.

Questions were also raised about Grid planning, to which respondents appeared to agree that too much is moving to identify a “right” strategy, especially as there isn’t even agreement on how to weigh technical issues such as reliability against other social goals we “should” be pursuing. The underlying complexity raised by these superficially straightforward questions was well-highlighted.

Michael Picker, President of the California Public Utility Commission (CPUC) noted that despite all the issues the CPUC addresses, DE issues are of significant importance. CPUC needs to consider even the framework for its decision making processes going forward. A system designed to regulate railroads in the 1890’s may not provide the responsiveness and flexibility for regulating changes to utilities in a rapidly evolving technological, economic and social environment. The “adversarial” approach used in CPUC proceedings may not be the best approach—why is the current process more dependent on legal skills than on engineering skills? The desire is to move forward not too fast, not too slow in opening the market to competition while allowing utilities to remain viable business entities. These are issues that could keep one up at night.

Michael Picker (CPUC, left) and Shayle Kann (GTM, right) during their “Fireside Chat”

GTM California's Distributed Energy Future Conference

The second, albeit lesser, recurring theme I heard at the conference was that of CCA developments. Until this year, there have been only three of these organized in California: Marin (with subsequent geographic extensions) and Sonoma were cited above, and Lancaster Choice Energy was launched in 2015. San Francisco’s Clean Power SF, Silicon Valley Clean Energy and Peninsula Clean Energy (San Mateo County) are in the process of launching this year.

As Mark Ferron, CAISO Board of Governors, cited, in 5 years 60% of the state’s eligible population could potentially be served by CCA’s if all programs now in discussion came to completion in that time. He provided a link in later discussion which I repeat here for those who want to follow up on the tally he reported: climateprotection.tumblr.com/tagged/Community-Choice

CCA’s make solar available to those in multi-family dwellings or who own a home not situated with a solar-favorable orientation or location. Expansion of solar power to these customers is required if solar-based power is to expand. Yet as Michael Picker observed, CCA “forced collectivization is a coup against the traditional utility model, challenging utilities and eroding the role of the PUC.” We don’t know yet where this takes existing suppliers and industry participants.

The challenges of the new, evolving energy infrastructure are actively being addressed by the states of California and New York. Conferences such as this provide an excellent opportunity to reflect on the issues and the difficulty this transition poses for firms competing in the market, regulators and the state legislatures who will eventually need to rewrite the rules for structuring state energy markets.

Patagonia to Fund Rooftop Solar Installations on 1,500 Homes

By Lorraine Chow, EcoWatch, March 11, 2016

While many major retailers—including Apple, IKEA and recently Whole Foods—are investing in solar to supply their own businesses with power, Patagonia wants you to have this clean, green renewable energy yourself.

The outdoor clothing and gear company is bringing rooftop solar to 1,500 homes in Arizona, California, Connecticut, Delaware, Maryland, Massachusetts, New Jersey and New York. The company made the announcement Thursday in a blog post:

Led by Patagonia and Kinaʻole Capital Partners, LLC, a first-of-its-kind group of five certified B-Corporations has come together to create a $35 million tax equity fund that will make the benefits of solar power available to more than a thousand U.S. households. The new fund uses state and federal tax credits to direct Patagonia’s tax dollars for residential development of affordable, efficient Sungevity solar energy systems.

The five B Corporations involved in the project are: Patagonia, which will be the tax equity investor; Kinaʻole, as the fund manager; New Resource Bank and Beneficial State Bank as lenders; and Sungevity, Inc., as the project developer.

The homeowners taking part in the venture will pay no up-front costs as they will sign a power purchase agreement (PPA) to buy solar energy for less than their utility’s rates. Any surplus power the panels generate will be sold back to the utility.

In all, the rooftop systems installed through Patagonia’s new solar fund are expected to produce 200 million kilowatt hours (kWh) of electricity over the solar installation’s typical 20-year life span.

Read full article from EcoWatch

New Report: Greatest Growth in Consumer Adoption of Solar Energy Among Middle Class

A new report on residential rooftop solar installations indicates the growth in California’s rooftop solar market is trending toward greater adoption by middle class households. The trend, seen over the course of eight years, aligns with a steady decline in the cost of solar power and in the increase of financing options.

The new study by Kevala Analytics analyzed California Public Utilities Commission (CPUC) solar interconnection data for 386,000 net metered solar systems installed from 2008-2015. The main takeaway conclusion from the study is that as solar deployment has expanded statewide, an increasing percentage of installations within that time frame are benefiting low- and middle-income median zip codes, with a decreasing fraction of installations in upper-income zip codes.

During these same eight years, there has been a steep decline in the adoption of solar among upper-income households contrasted with a recent increase in the market among the lowest-bracket incomes. In 2015, the statewide number of households in the highest income brackets matched the number in the lowest income brackets.

Read full press release from CALSEIA

The Silicon Valley Idea That’s Driving Solar Use Worldwide

By Mark Chediak & Christopher Martin, Bloomberg News

Silicon Valley has something to offer the world in the drive toward a clean energy economy. And it’s not technology.

It’s a financing formula. In a region that spawned tech giants Apple Inc. and Google and is famous for innovators and entrepreneurs like Steve Jobs, a handful of startups began offering to install solar panels on the homes of middle-class families in return for no-money down and monthly payments cheaper than a utility bill. This third-party leasing method — which made expensive clean energy gear affordable — ignited a rooftop solar revolution with annual U.S. home installations increasing 16-fold since 2008, according to the Solar Energy Industries Association and GTM Research.

“There is a reason why California is a tech Mecca for the world because the infrastructure is here to attract that talent,” said SolarCity Corp.’s Chief Executive Officer Lyndon Rive, whose company popularized third-party solar leases for homeowners starting in 2008. “All the major innovation is going to occur in California. One of the innovations is the financing of solar assets.”

SolarCity took the leasing model that SunEdison Inc. first developed for the solar industry by a graduate student named Jigar Shah. SolarCity adapted that model for residential consumers in 2008 and many more offered similar arrangements including Sunrun Inc., which developed the first one in September 2007, and Vivint Solar Inc. And now the idea is spreading to other industries trying to sell expensive capital equipment that reduce pollution and fossil fuel consumption.

Read full article from Bloomberg News

Rooftop Solar Brings Higher Home Appraisals

By Katherine Tweed, Greentech Media

Homes with rooftop solar are appraised at a higher value, according to new research from Lawrence Berkeley National Laboratory.

For the past few years, Berkeley Lab has been collecting data on the value of homes with solar photovoltaics compared to those without PV. Early studies relied on modeling and found that buyers were willing to pay an average of $15,000 more for a home with a solar PV array. Another study from January, based on survey data, found that homebuyers were also willing to pay a premium for leased systems.

The latest piece of research furthers those findings by assessing appraisals for PV homes in six markets within Oregon, California, North Carolina, Florida, Pennsylvania and Maryland. The appraisal premium ranged from about 3 percent to 6 percent based on the region, with a price boost of about $10,000 to $22,000. The valuations were based upon PV homes compared against comparable non-PV homes by local appraisers.

Read full article from Greentech Media

PG&E Surpasses 10,000 Solar Customer Milestones in Bakersfield, Fresno and San Jose

Pacific Gas and Electric Company (PG&E) today celebrated connecting 10,000 solar customers each in three of California’s largest cities – Bakersfield, Fresno and San Jose – as part of PG&E’s milestone of connecting the 175,000th solar customer to its electric grid. These achievements, along with a new survey finding that 25 percent of Californians are considering solar panels for their home, underscore how quickly California residents are blazing a trail for solar adoption supporting a clean energy future.

“PG&E proudly supports customer choice when it comes to renewable energy. We connect thousands of new customer-owned solar installations to our grid every month with some of the fastest connection speeds in the nation. This rooftop solar power supplies clean energy to our customers and communities, and is a key part of California’s energy future,” said PG&E’s Senior Vice President and Chief Customer Officer, Laurie Giammona.

The growth is especially apparent in Bakersfield, Fresno and San Jose as each city celebrates 10,000 local solar customers connected to PG&E’s electric grid, highlighting the innovative spirit of these communities as they invest in a sustainable tomorrow. Each city has a powerful solar story to tell:

Read full press release from PG&E