About Us

Massachusetts-based 621 Energy builds, owns, operates and services solar photovoltaic systems for businesses and nonprofit organizations. We provide a complete range of solar PV solutions including:

Project Development
Turnkey Installation
Financing
Operation and Maintenance
Solar and Energy Consulting Services

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, 621 Energy ensures 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 monitoring which are designed to meet the requirements of the most discerning customers.

As a part-owner of 20 solar energy projects for Massachusetts nonprofits, 621 Energy has a unique “owner’s perspective” we bring to the implementation of all our solar PV projects, with special attention to maximizing the lifetime value of the project.

Since our founding in 2011, our commitment to the customer experience is backed by our reputation for technical excellence, personalized service, and attention to detail throughout the entire solar energy process.

**Our Mission**

**621 Energy** operates on the premise that individuals, businesses and nonprofit organizations have a responsibility to protect our environment and take action to mitigate climate change.
**621 Energy**’s mission is to help our customers reduce their energy costs and carbon footprint by providing quality, cost-effective, high-performing solar solutions.
An integral part of our mission is to invest our profits and time into providing solar solutions to the nonprofits that serve our local communities.

Our Commitments

We will:
• treat our customers, team members, subcontractors and vendors as we would like be treated: respectfully, responsively, and ethically
• patiently help new customers define their goals, evaluate their options, and make informed and confident decisions
• take care of the entire implementation process, from design to engineering, permitting, installation and monitoring, so that going solar is seamless and hassle-free to the customer
• implement every project as if we will own the system, using high quality products, proven designs with complete documentation, good installation practices and ongoing monitoring in order to maximize the lifetime value of the project
• consider the aesthetic impact of the PV system on the building and site during design and installation

What is kWh/kWp Performance?

The peak kilowatt (kWp) rating for a solar PV module represents the instantaneous DC power output rating of an individual module under standard testing conditions. For multiple modules connected as a PV system, module kWp ratings are summed to establish the kWp PV system rating.

The PV system generates AC electrical energy measured in kilowatt-hours (kWh). kWh/kWp is a measurement of the PV system performance in the field for a period of time and varies depending on the local solar resource, module characteristics (i.e. temperature coefficients, degradation rate) and system installation factors (shading, tilt, orientation, inverter efficiency, etc.). For a given location, kWh/kWp provides the best means of comparing installed PV system performance and is independent of system size or module efficiency rating.

All PV systems are not the same.

Many installed PV systems are underperforming their potential production through sub-optimal design, installation or maintenance practices.

The above graph of a selection of publicly available commercial roof-mounted PV system kWh/kWp performance in the Boston, MA area demonstrates the great variation in solar PV system performance and the opportunity for significant improvement. For 15 systems, kWh/kWp values range from 758 to 1,417 with an average of 1,133 for the year.

621 Energy uses the best project management, up-front engineering, installation, commissioning, monitoring/analysis and maintenance processes to provide a high-performing (kWh/kWp) PV system in a cost-effective manner.