About Us

Capital Sun Group, Ltd., Cabin John, Maryland, is a Schedule C Maryland Corporation that was incorporated in 1997. We are a solar energy company specialized in selling, installing, and servicing micro- to large-scale residential and commercial solar energy projects, including photovoltaic, thermal, and solar thermal electric. Capital Sun is a member of the Maryland-DC-Virginia Solar Energy Industries Association, and our two principals, Carlo La Porta and Albert Nunez, have worked in the solar energy field since the 1970s. Besides design and construction of many types of solar energy systems, they have a breadth of experience from policy analysis and technical writing to consulting on solar for home owners. Capital Sun does not compete with wholesalers of solar equipment. We work at the delivery end of the solar market using our creativity and long experience to help customers select the most practical and economic solar energy systems for their needs. We are not tied to any particular solar manufacturers, but we know which ones we trust and we always select the best technology for the job.

Services Offered

• Solar equipment sales and installation
• Solar project development and management
• Market research and solar business consulting
• Solar proposal and contract management
• Graphic design and advertisement material for solar companies
• Solar energy training classes
• Consulting to industrial firms on solar energy applications

Areas of Market and Technical Expertise

• Photovoltaic electric systems and super efficient LED PV lighting systems
• High concentration gallium arsenide photovoltaic technology
• Low- and mid-temperature solar thermal energy systems with flat plate, evacuated tube, or transpired air collectors
• High-temperature commercial/industrial solar systems using concentrating collectors for electricity or thermal energy systems
• Solar absorption cooling systems

Selected Client List

• Solarex (now BP Solar)
• Solar Energy Industries Association
• National Capital Children's Museum
• Industrial Solar Technology Corporation
• Living Classroom Foundation
• Baba Saho Enterprises
• Kgalagadi Resources Development Company
• Science Applications International Corporation
• National Institutes of Standards and Technology
• United Solar Technologies, Inc.
• Pine Crest Elementary School
• U.S. Army Corps of Engineers
• Arlington County, Virginia
• Oak Creek Club, LLC
• U.S. Department of Defense, Pentagon
• GSA, Social Security Administration
• GSA, Federal Research Laboratory, Maryland

Solar Thermal Technologies

• Standard solar water and space heating systems using flat plate collectors, glazed, unglazed, and evacuated tube
• Industrial Solar Technology concentrating parabolic troughs for industrial and institutional hot water and steam systems
• Absorption cooling with parabolic trough or evacuated tube thermal collectors
• Conserval SolarWall transpired panels for ventilation air and space heating and for process and solar crop drying
• Solar thermal electric power systems with IST parabolic trough concentrators and various heat engines
• Swimming pool, spa, and pond heating systems

Photovoltaic Technologies

PV Collectors

• Polycrystalline
• Single Crystal Silicon
• Amorphous Silicon
• Copper Indium Diselenide
• Building Integrated

PV Systems

• Mobile electric power packs
• Super efficiency LED lighting
• Grid-tied building electric
• Off-grid home electric
• Water pumping