Tag Archives: 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

Utilities look to reverse net metering decision

By Rob Nikolewski, The San Diego Union-Tribune

San Diego Gas and Electric and two other major California utilities Monday filed applications urging the California Public Utilities Commission to hold a rehearing to vacate or make “modifications” to its decision keeping retail rate net metering in place until 2019.

“We feel it’s in the best interest of our customers to re-look at this issue and consumer advocates actually agree, as they have taken similar action,” said SDG&E representative Amber Albrecht.

In January, in a tense 3-2 vote, the CPUC sided with solar backers over utilities that insist they are not trying to blunt the growth of solar power in California. Instead, utilities say the net metering system that pays rooftop solar customers for the excess electricity their systems send back to the grid is unfair to consumers who don’t have solar energy systems. Solar companies and their customers say the power their systems generate helps lower strain on the electrical grid and reduces the need to buy power during times of high demand.

The commission — in a ruling that ran more than 150 pages — agreed to keep tying credits to retail rates, rather than near wholesale rates that other states use. The CPUC said it will continue to re-evaluate the rules but the decision was widely viewed as a big win for solar, as other states such as Nevada have rolled back some solar incentives.

SDG&E filed its application for rehearing jointly with Southern California Edison, calling on the CPUC to make changes to its decision. Pacific Gas and Electric also filed paperwork Monday, the deadline for applications for a rehearing, looking to get the commission to vacate its ruling. The CPUC has 120 days to respond to the requests for a rehearing.

Read full article in the San Diego Union-Tribune

Whole Foods teaming with NRG and Solar City to install rooftop solar at 100 stores

By Samantha Masunaga, The Los Angeles Times

Whole Foods Market Inc. is embracing solar power. The Austin, Texas-based grocery chain has signed agreements with SolarCity and NRG Energy Inc. to install rooftop solar units at up to 100 stores and distribution centers.

NRG, based in Princeton, N.J., will install the units at up to 84 locations in nine states, according to a joint statement from the two companies. San Mateo, Calif.-based SolarCity will install the rest, Whole Foods spokeswoman Blaire Kniffin said.

The companies did not disclose the locations of the stores that will receive the rooftop solar units, but Kathy Loftus, Whole Foods’ global leader for sustainability, said the company’s goal was to have rooftop solar units in every region. A store’s rooftop solar unit can generate about 5% to 20% of the yearly electricity that store needs, Loftus said. In a statement, Whole Foods said it would buy discounted power from SolarCity.

Whole Foods says it currently has rooftop solar installed at 20 stores. Tuesday’s announcement comes 14 years after the chain installed solar-powered lighting for the first time, at a store in Berkeley. Installation of the newly announced solar units will begin in the spring, Loftus said.

Read full article in the Los Angeles Times

Smug About Your Solar Roof? Not So Fast

By Severin Borenstein (Professor, UC Berkeley), The Los Angeles Times

If you’ve installed solar panels on your roof and feel aglow with environmental virtue, you may be in for a rude awakening. There’s a good chance someone else has purchased your halo and is wearing it right now.

In most states (including California), rooftop solar panels earn Renewable Energy Certificates, which quantify how much clean electricity they produce. But if panels are leased or installed under a power purchase agreement, it’s the “third-party owner” — not the homeowner — who gets those certificates. Most then turn around and sell the RECs, a process that magically turns brown electrons green.

Here’s how it works: Joe’s Solar puts panels on your roof that produce 7,500 kilowatt-hours a year, and Joe sells you the electricity under a power purchase agreement. Because Joe still owns the panels, he gets credit — in the form of RECs — for that renewable electricity. Meanwhile, Bob’s all-fossil utility wants to “green up” so it buys RECs from Joe. That allows Bob to relabel 7,500 kilowatt-hours of his coal- or gas-fired power generation as “renewable energy.”

It may sound strange, but a market to sell or trade RECs can be extremely useful. California, for instance, has a mandate for its utilities to generate 33% renewable power by 2020, but some parts of the state have little sun or wind resources. Still, utilities in sunny or windy spots can produce more than their requirement and then sell the extra RECs to areas where it would be much more costly, or impossible, to hit the target. Thus, the RECs market allows a utility in one region to finance additional green energy production in another where it is cheaper, supporting more carbon reduction at a lower cost to consumers.

That seems sensible enough. But something’s wrong if the buying and selling utility companies both claim that green power as their own. And that’s essentially what’s been going on with solar rooftops.

Read full op-ed in the Los Angeles Times

 

A Trifecta for Solar Energy and Distributed Generation

We all have good weeks and bad weeks. For proponents of Solar Energy (and all other inhabitants of our planet) this has been an historic week, with major achievements at the International, National and California-state levels. Setbacks will be inevitable, but the events of this week will have memorable and lasting impact.

The first and International achievement was the December 12 Agreement of 188 countries at the United Nations Conference on Climate Change in Paris to take measureable actions with the eventual goal of keeping global temperature rise to less than 2ᵒ Celsius (3.6ᵒ Fahrenheit) by 2050 compared with pre-industrial levels. As we have repeatedly been informed, this is the level estimated by numerous scientists to avoid the worst affects of atmospheric warming and ocean rise.

Though yet to be ratified (a process that starts in April 2016), the agreement commits those countries that do ratify the agreement to establish national emission targets and report on progress every 5 years. While the agreement calls for zero net anthropogenic greenhouse gas emissions to be reached during the second half of the 21st century, lowering the target would (according to some scientists) move this goal forward to the 2030 – 2050 timeframe. Either way, implementation of this agreement puts pressure on countries to support low- and non-carbon energy sources, solar very much included, accelerating their deployment and continued improvements.

The second and national achievement has not been enacted as this is written, but is the tentative agreement by Republican and Democratic House party leaders incorporated into the Appropriations bill that would extend tax credits for solar and wind projects from the current end-2016 expiration date through 2021. The agreement was the result of a compromise where-in Democratic Representatives would support eliminating the ban on US oil exports in exchange for Republican support for the Tax Credit extension.

While the vote can still go awry, a senior analyst at GTM Research (who closely follows the Solar market and industry) commented “the extension to the federal ITC is without question a game-changer for U.S. solar’s growth trajectory. Between now and 2020, the U.S. solar market is poised to see a number of new geographies open up with a 30% ITC, within both distributed and utility-scale solar.”

Finally, the third and California state achievement was the December 15 proposed ruling by the California Public Utilities Commission (CPUC) to leave in place most of the charges and fees now in place between the state’s major investor-owned utilities (Pacific Gas & Electric, Southern California Edison and San Diego Gas & Electric) and customers who have installed residential and commercial PV systems. Though yet to be finalized (in January 2016), the proposed ruling leaves in place most of the terms that allow customers with PV systems to recoup their investments in a timely manner thereby increasing the desirability of these systems.

Challenges to PV-favorable net metering terms and (lack of) other fees have been raised in many states, and regulator decisions have been mixed. The proposed CPUC ruling is perhaps the strongest pushback by any state regulator to utility claims of the high costs distributed PV systems impose on other (non-PV owning) rate payers. While new costs are proposed, and some uncertainty is introduced by requiring PV-system owners to be placed on Time-of-Use rates (with unknown impact on their bills), the proposed ruling is seen as leaving the business environment favorable for continued expansion of distributed generation.

For now the sun shines on distributed generation and the growth of solar-sourced clean energy. Let us hope that all three events help realize solar’s potential contribution to our future energy mix for the sake of maintaining our habitable planet.