Massachusetts-based 621 Energy, LLC builds, owns, operates and services commercial-scale solar photovoltaic systems. We provide a complete range of solar PV solutions including:June 21st is most often the date of the summer solstice, when the sun’s position in the sky reaches its northernmost extreme. This is the longest day of the year and a peak solar power day in the northern hemisphere.In the spirit of the summer solstice, the mission of 621 Energy is to ensure that our solar photovoltaic (PV) systems and those of our clients operate at a peak performance level.

621 Energy furnishes and installs roof and ground-mounted commercial solar photovoltaic (PV) systems. These systems can be owner-financed or 3rd party financed at no up-front cost to the building owner.We also provide no-cost systems to non-profit organizations.All PV systems are monitored on a daily basis to ensure long-term peak performance. June 21st is most often the date of the summer solstice, when the sun’s position in the sky reaches its northernmost extreme. This is the longest day of the year and a peak solar power day in the northern hemisphere.In the spirit of the summer solstice, the mission of 621 Energy is to ensure that our solar photovoltaic (PV) systems and those of our clients operate at a peak performance level.The experienced 621 Energy team has developed standards for project management, engineering, product selection, installation, documentation and ongoing monitorin