BOULDER, CO / WILTON, CT — Riverside Partners is pleased to announce that its portfolio company, Earth Friendly Energy Group Holdings, LLC, d/b/a Alteris Renewables, Inc. and Real Goods Solar, Inc. (NASDAQ: RSOL) have entered into a definitive merger agreement to create a multi-state solar integration powerhouse. During the twelve months following the merger the combined companies expect to report revenue approaching $200 million.

The merger will bring together two pioneers and leaders in the solar industry, each with more than 30 years of experience in their respective markets. Combining a widely recognized and reputable consumer brand with a premier commercial customer base, a strong array of financing solutions and in-house engineering expertise, this merger will create a leading renewable energy integrator. Real Goods Solar will be well poised to capitalize on strong solar installation growth with more than a dozen offices, covering both coasts with national designbuild-finance-operate capabilities.

Real Goods Solar also announced today that Bill Yearsley has joined the Company as CEO and has been elected to the board of directors. In his career Yearsley was Chairman and CEO of the Construction and Aggregate Group, and an Executive Director of Redland PLC, a $4.2 billion revenue company traded on the London Stock Exchange. Redland had over 20,000 employees operating in 34 countries in the construction contracting and materials sector. Yearsley also has extensive acquisition experience, having completed over 40 transactions and was very active in finalizing terms of the Alteris transaction. Yearsley is also an early investor of a fund that develops utility grade biomass electric generation plants in North America. His residence located in Colorado produces most of its electricity from a hybrid system comprised of wind generation and photovoltaics.

Reporting to Bill Yearsley will be Real Goods Solar's President, John Schaeffer, who will become President of Residential; Alteris' Head of Commercial, Ron French, who will become President of Commercial; and CFO, Erik Zech. Steven Kaufman, current CEO and board member of Alteris, will join Real Goods Solar's board and will leave his operating position at Alteris. David Belluck, Chairman of Alteris and General Partner with Riverside Partners, based in Boston, who is the controlling investor of Alteris, will also join Real Goods Solar's board.

Jirka Rysavy, Chairman of Gaiam, Inc., will continue as Real Goods Solar's Chairman. “Riverside Partners’ vision for Alteris, from the inception of our investment, was to create a leader in the solar industry with a national footprint. Real Goods Solar is the ideal partner for Alteris because of the highly complementary strengths of the two companies and the shared values and culture of the two organizations. We are looking forward to a long and successful partnership with the Real Goods Solar team,” said David Belluck, a General Partner of Riverside Partners and board member of Real Goods Solar.

“I am excited to join Real Goods Solar, the pioneering solar company in the United States,” commented Bill Yearsley the new CEO. “Our ability to execute projects successfully is highly dependent on human resources, our most important asset. Having the opportunity to bring together two very seasoned management teams positions our organization well for the future. The organization we are building will now be capable of providing integrated national project delivery. This is an industry that is built around constant change and I look forward to a program of well planned profitable growth both organically and through acquisitions.”

Riverside Partners’ vision for Alteris, from the inception of our investment, was to create a leader in the solar industry with a national footprint. David Belluck General Partner, Riverside Partners

“Together, we are a much stronger company with a better ability to compete in the market that we established when Real Goods Solar sold the very first solar panel to the public in 1978,” said John Schaeffer, President. “We can leverage our complementary expertise and geographies to accelerate the adoption of clean energy across the country. With the U.S. solar market projected to grow fivefold from 2010-2015, our Company has plenty of opportunity ahead of it.”

The merger is subject to approval by Real Goods Solar's shareholders and is expected to close in the third quarter of 2011. Gaiam, Inc., the creator of Real Goods Solar who holds a majority of Real Goods Solar's voting securities, has indicated that it will vote in favor of the merger. For accounting purposes, Alteris' financial results will be consolidated with Real Goods beginning immediately. Real Goods Solar was advised by Stifel Nicolaus Weisel and Alteris Renewables by Canaccord Genuity.

Additional Information
This press release is provided for informational purposes only and is neither an offer to purchase nor a solicitation of an offer to sell shares of Real Goods Solar or Alteris. Real Goods Solar will file an information statement with the Securities and Exchange Commission (the “SEC”) in connection with the proposed merger. Investors are urged to read those filings, and any other filings made by Real Goods Solar with the SEC in connection with the proposed merger, when they become available, as they will contain important information about the proposed merger. Those documents, when filed, as well as Real Goods Solar's other public filings with the SEC, may be obtained without charge at the SEC's website at www.sec.gov or by directing a request to: Real Goods Solar, Inc., 833 W. South Boulder Rd., Louisville, Colorado 80027, Attention: Investor Relations.

About Real Goods Solar
Real Goods Solar, Inc. (NASDAQ: RSOL) is a leading solar energy integrator in California and Colorado, having installed over 7,300 residential solar electric systems. Real Goods Solar offers turnkey solar energy services, and has 33 years of experience in sustainability, beginning with the sale in 1978 of the first solar photovoltaic, or PV, panels to the public in the United States. Real Goods serves commercial, residential, education, government and institutional clients. For more information, visit www.realgoodssolar.com.

About Alteris
Alteris is one of the largest design-build solar integration companies in the Northeast, with more than 4,000 solar electric systems installed during the past 30 years. Operating from locations in New Jersey, Connecticut, Massachusetts, New York, Pennsylvania, Vermont, New Hampshire and Rhode Island, Alteris provides solar and wind energy solutions for commercial, residential, education, government, utility scale, and institutional clients. The company has industry-leading expertise in engineering, design, project management, performance analysis, project financing and renewable energy credit programs. For more information, visit www.alterisinc.com.

About Riverside Partners
Founded in 1989, Riverside Partners is a middle market private equity firm currently investing Riverside Partners Fund IV, L.P. The fund focuses on growth oriented companies primarily in the healthcare and technology industries. Riverside Partners is particularly experienced at partnering with founders, owners and management teams and it brings substantial domain expertise and operating experience to its portfolio companies. The partners at Riverside Partners have managed more than $500 million in investments in over 50 companies. The firm is currently focused on companies with revenues between $20 and $200 million and with $5-$25 million of EBITDA. For more information, please visit www.riversidepartners.com.

Riverside Partners Contact:
Jon Lemelman
General Partner
Riverside Partners, LLC
One Exeter Plaza 699 Boylston St.,
8th floor
Boston, MA 02116
Tel (Direct): 617 351 2810
Email: jlemelman@riversidepartners.com

Real Goods Solar Contact:
Erik Zech
Chief Financial Officer
Real Goods Solar, Inc.
Tel : 303 222 8400
Email: erik.zech@realgoods.com

This press release includes forward-looking statements relating to matters that are not historical facts. Forward-looking statements may be identified by the use of words such as “expect,” “intend,” “believe,” “will,” “should” or comparable terminology or by discussions of strategy. While Real Goods Solar believes its assumptions and expectations underlying forward-looking statements are reasonable, there can be no assurance that actual results will not be materially different. Risks and uncertainties that could cause materially different results include, among others, introduction of new products and services, completion and integration of acquisitions, the possibility of negative economic conditions, and other risks and uncertainties included in Real Goods Solar's filings with the Securities and Exchange Commission. Real Goods Solar assumes no duty to update any forward-looking statements.