Solar as a business strategy

At Coronal’s core is the belief that solar PV is the most reliable, cost-efficient and universally available alternative energy source: one that enables organizations to better predict and manage their energy costs over extended periods of time, while enhancing their reputation with customers and employees.



Coronal Group LLC comprises a diverse team of renewable energy veterans with extensive experience in developing, financing, building and managing solar photovoltaic (PV) projects. What differentiates Coronal is the collaborative nature under which the company operates.

Coronal’s exclusive strategic relationship with Panasonic Eco Solutions, the largest renewable energy company in the U.S., provides the financial strength, global procurement strategy, engineering expertise and long-term operations and maintenance (O&M) services that ensure lasting peace of mind for customers.

HelioSage Energy was launched in 2008 as a greenfield solar development firm. Focused primarily on serving utilities, HelioSage has executed over 400 megawatts of power purchase agreements with the likes of Duke Energy, Georgia Power Company, and the Tennessee Valley Authority, and has in excess of 1.5 GWs of projects in development. In addition, from 2012-2014 HelioSage served as the exclusive solar consultant and transaction advisor for Dominion Resources (NYSE: D), participating in the origination, due diligence, and acquisition of 230+ MW now owned by Dominion.

In early 2015 Coronal acquired the majority of HelioSage Energy’s assets and formed Coronal Development Services, LLC, an end-to-end development platform backed by Panasonic. Now operating as Coronal Development Services, the former HelioSage team continues to deliver best-in-class solar development solutions to the industry’s most sophisticated buyers.

Coronal Group

Coronal Group is an alternative energy firm that finances and operates solar photovoltaic projects for institutions, municipalities, corporations and non-profit organizations throughout the North America. The Coronal team brings more than 80 collective years of successful asset and investment management experience and a strong record of solar project development. The company acquired the majority of the assets of HelioSage Energy, a leading provider of solar development solutions and formed Coronal Development Services, LLC (CDS), in 2015. CDS offers utility and commercial clients a fully integrated, streamlined development solution, from project origination through financing, construction, long-term operation and asset management.

In December, 2014 Panasonic Enterprise Solutions Company made a strategic investment in Coronal. Since 2013, Panasonic and Coronal have developed, built and now operate, or are currently constructing, a portfolio of solar systems in North America totaling nearly 100 megawatts (MW) of renewable energy. For additional information, please visit


Traditional solar models often require the involvement of different third-party vendors at each phase of development. Partnering with a new vendor at each phase causes solar projects to become disjointed and inefficient, resulting in cost increases, redundant use of in-house resources, missed deadlines and dissatisfaction with the process.

The Coronal-Panasonic-team has developed a new model that brings everything under one roof. Serving as a one-stop shop for renewable energy, this streamlined solution provides project development, engineering, financing, construction and long-term operations and maintenance backed by Panasonic. This platform simplifies projects and mitigates delivery risk, for a more efficient, cost-effective solution that ensures attractive and reliable benefits for decades to come.


Panasonic Eco Solutions

Panasonic Eco Solutions is committed to being a leading green innovation company by providing renewable energy solutions that efficiently, reliably and sustainably lower energy costs. Panasonic has established an exclusive strategic relationship with Coronal, bringing their combined expertise in solar PV engineering, finance, operations and management to mid- to large-size projects in the private and public sectors. The one-stop shop model streamlines project development and delivers long-term O&M with the certainty that only a 98-year-old global leader can offer.


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Coronal Development Services

Coronal Development Services (CDS) provides commercial and utility clients with a fully integrated solar development solution extending from project origination through financing, construction, and long-term operation. CDS was formed in January 2015 when Coronal Group acquired the majority of the assets of HelioSage Energy, a leading solar development firm focused primarily on utilities in the United States. At the time of the acquisition, HelioSage was one of the nation’s fastest growing independent solar development firms and had executed over 400 megawatts of power purchase agreements with clients including Duke Energy, Georgia Power Company, and the Tennessee Valley Authority.

Today Coronal Development Services is an end-to-end development platform integrating the strength and experience of HelioSage, Coronal Group and Panasonic, thereby delivering clients and investors with unparalleled capabilities and peace of mind.

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Coronal Asset Management

Once a project is constructed and operational, Coronal Asset Management manages the asset for the duration of the system’s life. Coronal-Panasonic has established a set of operations and maintenance (O&M) and accounting standards to ensure that the system is performing at an optimized level, operationally as well as financially. The team keeps investors informed through quarterly reporting, handles all aspects of the lender-borrower relationship, and manages the communication and reporting requirements to the off taker. Finally, data gathered through the operational experience of the team is fed back into the evaluation process for new assets, allowing Coronal to better value future projects for investors.


Coronal Group Canada

Coronal Group Canada provides project development, financing, building, operations and maintenance of solar PV projects for both public and private sector companies and organizations in Canada.


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Jonathan D. Jaffrey

Chairman and CEO

Jonathan D. Jaffrey, chairman and CEO of Coronal Group, brings a proven record of leadership and expertise in the renewable energy sector. Mr. Jaffrey works closely with members of Coronal’s Investment Committee to set the company’s investment strategy and direction. In addition, he is responsible for all investor relationships including Coronal’s relationship with Panasonic Eco Solutions North America.

In 2009, prior to forming Coronal, Mr. Jaffrey co-founded Renewable Social Benefit Funds, L3C (RSB Funds), which financed, developed and installed over 15 MW of solar photovoltaic projects. RSB Funds’ innovative approach to combining public and private financing of solar projects was recognized by the White House Office of Innovation and Civic Participation in 2011. Prior to entering the renewable energy sector, Mr. Jaffrey spent more than a decade overseeing the W.M. Keck Foundation’s $1.4 billion grant-making and administrative operations as chief operating officer. In addition, he was president of a multi-generation family office overseeing the stewardship and investments of over $2.5 billion in assets.

Dedicated to making a meaningful difference, Mr. Jaffrey is on the boards of several philanthropic organizations including serving as chairman and president of Student Philanthropists Advancing Real Change (SPARC). He holds a bachelor’s degree from the University of Arizona and a master’s degree from the University of Southern California.

Ed Feo


Edwin F. Feo, president of Coronal Group, is responsible for Coronal’s development efforts and for maintaining the firm’s developer relationships. Mr. Feo is a pioneer in energy development and finance and a respected authority on the energy industry. He leads an ongoing dialogue on renewable energy by chairing or speaking at top industry conferences. He was named one of the “Five Most Influential People in Renewable Energy” by Euromoney/Institutional Investor and ranked by Project Finance magazine in “Deals of the Year” and “Top Legal Advisors” in the renewable energy industry.

Prior to Coronal, Mr. Feo co-chaired the Global Project Finance practice at the international law firm of Milbank, Tweed, Hadley & McCloy, LLP, where he spearheaded the development of one of the first law firm practice groups devoted to renewable energy. Under his leadership, the group closed more than 200 renewable energy transactions for more than $35 billion in capital.

He was a co-founder of USRG Renewable Finance, which arranged the senior debt financing for 375 MW of rooftop solar photovoltaic projects. Highly active in the industry, Mr. Feo serves on the boards of several companies engaged in the financing of renewable energy and energy efficiency systems.

Mr. Feo holds a bachelor’s degree from the University of California, Los Angeles, and earned his Juris Doctor degree from the University of California, Los Angeles-School of Law.

C. Thomas Paschall

Chief Commercial Officer and Managing Director

C. Thomas Paschall, chief commercial officer and managing director for Coronal Group LLC, is responsible for leading the company’s business development efforts in the distributed generation and community solar sectors. He has extensive expertise and over 17 years of experience in financial transactions in the renewable energy field. Previously, Mr. Paschall served as general counsel for Coronal.

In January 2015, Coronal Group acquired the majority of the assets of HelioSage Energy and formed Coronal Development Services (CDS), uniting two solar PV industry leaders with Panasonic Eco Solutions, a global technology giant, to provide the North American utility market with the most robust, fully integrated, end-to-end solution available.

Prior to joining the Coronal team, Mr. Paschall was a senior attorney in the Global Corporate and Project Finance groups of Milbank, Tweed, Hadley & McCloy LLP. He was corporate and transactional attorney for numerous publicly traded and privately held renewable energy companies in the wind, solar, biofuel, waste to energy and other sectors, focusing on joint ventures, mergers and acquisitions, project lending and tax equity investment and matters relating to formation and structuring of special purpose vehicles for acquisitions and financing. He has served as counsel on dozens of energy M&A and financing transactions representing billions of dollars, including some of the most significant in the industry, including Sharp Corporation’s acquisition of Recurrent Energy (and subsequent representation of Recurrent Energy in various transactional matters), and the acquisition by Infigen Energy of over a 1 GW of wind energy assets.

Mr. Paschall earned a bachelor’s degree magna cum laude from Duke University, and his Juris Doctor from the University of Southern California School of Law. He is a member of the State Bar of California and the American Bar Association.


Philip R. Leiber


Philip R. Leiber, CFO of Coronal Group, has nearly two decades of financial experience in the electric utility and renewable energy industries. Mr. Leiber works closely with Coronal’s executive team to set the company’s financial direction while actively participating in the company’s overall strategy. He is responsible for all financial administration, business planning, and budgeting.

Before joining Coronal, Mr. Leiber served as the CFO of the Los Angeles Department of Water and Power, the nation’s largest municipal utility, where among other responsibilities, he provided analysis and financing for renewable energy projects designed to meet the State of California’s 33% renewable requirement by 2020. Prior to that he was CFO at Seattle City Light, the nation’s first carbon neutral electric utility. In these roles, Mr. Leiber was responsible for financial planning, rates, and structuring transactions to meet regulatory and other requirements.

Mr. Leiber earned both a bachelor’s degree and a master’s degree from the University of Michigan, Ann Arbor, and a second master’s degree from the University of Phoenix. He is a Certified Public Accountant in the State of California and a Certified Treasury Professional.  

Gregory Bohan


Gregory Bohan, co-founder of Coronal Group, is responsible for the company’s tax-equity relationships including debt and other funding sources. Prior to forming Coronal, Mr. Bohan co-founded and served as CFO and chief investment officer for Renewable Social Benefit Funds, L3C (RSB Funds), which financed, developed and installed over 15 MW of solar photovoltaic projects.

Earlier in his career, Mr. Bohan spent 25 years providing funding for equipment and projects across a broad spectrum of industries, governments, and geographies. He has underwritten, funded, syndicated, and securitized over $5 billion in financing. Mr. Bohan served in executive positions with Fortune 500 companies, a United States bank and private entrepreneurial companies. He was the founding general manager for Compaq Capital Asia Pacific Ltd., a joint venture between Key Bank and Compaq Computers (now Hewlett-Packard). Mr. Bohan opened and managed their offices in Auckland, Hong Kong, Singapore, Sydney and Taiwan. Additionally, he created and served as Senior Vice President and General Manager of Key Government Finance Inc. for Key Bank. This entity grew to over $600 million annually in new originations with a balance sheet of $1.5 billion in assets.

Mr. Bohan also held positions of increasing responsibility at Unisys Corporation, Unisys Finance Corporation and Leasetec Corporation. He earned his bachelor’s degree in industrial engineering from the General Motors Institute and his master’s degree from the University of Michigan.

Joseph M. Teltser

Deputy General Counsel

Joseph M. Teltser, general counsel and secretary for Coronal Group LLC, is responsible for the general legal affairs of the company and contributes to strategic decisions regarding mergers and acquisitions, joint ventures, legal and tax due diligence, and overseeing tax equity financing and debt structuring. He has significant experience in complex financing transactions.

In January 2015, Coronal Group acquired the majority of the assets of HelioSage Energy and formed Coronal Development Services (CDS), uniting two solar PV industry leaders with Panasonic Eco Solutions, a global technology giant, to provide the North American utility market with the most robust, fully integrated, end-to-end solution available.

Mr. Teltser came to Coronal after spending nearly a decade as an attorney at Milbank, Tweed, Hadley & McCloy LLP in its Global Corporate group. There he represented numerous solar, wind, biofuel and traditional energy companies in connection with a broad range of transactions, including mergers and acquisitions, divestitures, joint venture and financing.

Outside of Coronal, Mr. Teltser is a director and the treasurer of Learning Rights Law Center, a non-profit organization that provides legal services and training for low-income and disadvantaged students seeking to enforce their educational rights in the public education and juvenile justice system.

He earned his bachelor’s degree in chemical engineering from Princeton University and his Juris Doctor from the University of California, Berkeley, Boalt Hall School of Law. He is a member of the State Bar of California.

David A. Lamb

Senior Advisor

David A. Lamb, senior advisor for Coronal Group LLC, is responsible for consulting on all aspects of financing, real estate and legal matters relating to the company’s operations and projects. 

Prior to joining Coronal, Mr. Lamb was the chief operating officer, secretary and general counsel of LiveWire Innovation, Inc., a Utah based technology company commercializing its patented spread spectrum, time-domain reflectometry technology for detecting, locating and reporting events such as opens, shorts and arc faults in real time on energized electrical and data circuits. Prior to LiveWire, Mr. Lamb was a partner of the international law firm, Milbank, Tweed, Hadley & McCloy LLP where he led the Real Estate and Natural Resources practice group with over 30 years’ experience in the corporate, real estate, oil and gas, and renewable energy areas.

Mr. Lamb earned his BSC and MBA from Santa Clara University and his Juris Doctor from the UCLA School of Law.

Julie E. Ungerleider

Senior Vice President, Engineering

Julie Ungerleider, senior vice president of engineering for Coronal Group, is responsible for directing project engineering, development and construction. Ms. Ungerleider brings over 20 years of experience as an engineering, development and construction management executive. She has a comprehensive background in commercial and industrial development and renewable energy power plants, and has successfully managed over 100 MW of solar projects. Ms. Ungerleider has developed methodologies for efficient due diligence and development processes that streamline transactions, resulting in substantial savings on transaction costs.

Ms. Ungerleider most recently was vice president of systems and engineering for SolarWorld Americas’ systems and engineering division. She directed the design and development of multiple commercial and utility scale projects, including Highlander I and II totaling 26 MW. She was responsible for introducing next-generation mounting solutions for utility-scale power plants and rooftops through the management of a team of over 20 research and development mechanical engineers, design engineers and project managers. Prior to joining SolarWorld, Ms. Ungerleider was a senior project manager at SunPower Corporation where she managed the development and installation of over 60 MW of both commercial and utility-scale solar facilities.

Before entering the solar industry, Ms. Ungerleider worked for multiple Fortune 500 retail companies, managing the development of new store expansion programs, and for two large retail and commercial developers in Southern California on the development of large mixed-use retail and entertainment centers.

Ms. Ungerleider holds a bachelor of science degree from the University of Virginia in civil engineering.

Arthur Zeesman

Senior Vice President, Marketing

Arthur Zeesman, senior vice president of marketing, oversees all branding and marketing initiatives for Coronal Group. He is responsible for providing marketing strategy and support for outreach to developers, EPCs, facilities directors and corporate social responsibility officers. Mr. Zeesman’s previous solar and socially responsible investing experience includes work for RSB Funds, Sol Haven Fund and Springbanc Social Capital Advisors.

Mr. Zeesman is the founder and chief strategist of ZEESMAN, an award-winning brand strategy, marketing and design firm that was recently named “Professional Services Firm of the Year” by the City of Los Angeles. The company, founded in 1990, works with companies in financial and professional services, entertainment, hospitality, consumer electronics and apparel, as well as government agencies and nonprofits.

A member of the board of directors of SPARC (Student Philanthropists Advancing Real Change), Mr. Zeesman has also served as board president for the Los Angeles County Education Foundation and as a member of the Economic Development Council of the Beverly Hills Chamber of Commerce. He has a bachelor of arts degree from the State University of New York, Buffalo, and is a graduate of the Management Development for Entrepreneurs Program at UCLA Anderson School of Management.

Wayne A. Chomitz

Vice President, Project Finance

Wayne Chomitz, vice president of project finance for Coronal Group, is responsible for the financial analysis of prospective portfolio projects. Prior to joining the Coronal team, Dr. Chomitz worked with the Luskin Center for Innovation to evaluate the potential for deploying solar on UCLA’s campus and determined the financing for the project. Prior to his return to UCLA to work on his MBA in finance, he held the role of Scientist for three years at Precursor Energetics, a research firm focused on developing new materials for the clean energy space. At Precursor, he was responsible for R&D as well as working with external partners on commercialization efforts.

Dr. Chomitz holds a bachelor’s degree from the University of North Carolina at Chapel Hill, a Ph.D. from the University of California, Berkeley, and an MBA from the UCLA Anderson School of Management with a focus in finance.

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