California Solar Electric Cooperative

Founded in 2000, California Solar Electric Cooperative (Cal-Solar) has been at the forefront of solar technology, designing and installing pioneering grid-tied and unique off-grid commercial solar systems nationwide. Transitioning to a worker cooperative in 2019, we’ve cemented our reputation as a leader in environmental sustainability and are committed to fostering competitive, rewarding, and meaningful employment for our worker-owners and employees. Our mission centers around enhancing the quality of life for our clients, employees, and the broader community, measuring our success by the positive impacts we create.


We service Northern California – primarily the counties of Nevada Co, Placer, El dorado, Sierra, Sutter, and Yuba.

Solar Energy Services (SES)

Since 2006, Solar Energy Services, Inc. (SES) has built a strong presence as a leading solar EPC contractor across Maryland and the DC Metro area. Specializing in turnkey solar and energy storage systems, SES has delivered high-quality and custom solar solutions for homes and businesses in the Mid-Atlantic region for many years.

At SES, we believe in honesty, integrity, and the importance of diverse perspectives in the way we conduct business and beyond. We value trust and long-term commitment to employees, their families, and the community we serve. Through promoting a work environment that is safe, respectful, and inclusive, we empower team members to make informed business decisions. We value personal development and the social contributions of our work. Our focus on safety, planning, and teamwork helps us achieve company goals and profitability. We search out ways to improve based on customer feedback and our own experience and training.

Our aim isn’t just to move forward, it’s to thrive together.


Since 1984, SolarCraft has been installing and servicing solar energy and battery backup systems have helped North Bay homeowners and businesses save millions of dollars on PG&E bills each year, while protecting the environment and supporting the local economy. SolarCraft is a 100% Employee-Owned and operated business that takes pride in creating a brighter, cleaner and more sustainable future for our community.

Northwind Solar

Northwind Solar is central Wisconsin’s most trusted renewable energy solution provider, specializing in the design and installation of solar electric systems for residential, commercial, agricultural, and governmental customers. All told, the Northwind Solar team collectively brings over 100 years of combined experience in a wide range of renewable energy activities that includes design, installation, assessment, project management, consulting, service, and training.

In 2017, Northwind Solar transitioned into a worker-owned cooperative.  This business model strengthens Northwind Solar by empowering its employees and allowing a democratic approach to how Northwind operates.  We believe this model benefits not only its employees, but also its clients by ensuring that your solar installer is personally invested in your best interests.

Allterra Solar

Allterra Solar

Founded in 2004, Allterra Solar has become the leading solar installation company throughout the Central Coast and South Bay Area. Allterra has created an award winning product and service offering that makes switching to cost effective clean energy easy for home and business owners. The company’s success has been built upon customer service and employee retention. Allterra is composed of over 40 people who are passionate about solar and the community in which they work.

Allterra is consistently voted ‘Best Solar Company’ by readers of the Santa Cruz Sentinel, Good Times, and the Monterey County Weekly. Allterra was deemed ‘Best Place to Work’ by the Monterey County Business Council and the California Air Resources Control Board distinguished the company with the 2015  ‘Cool Climate Leader’ award, an honor given to only five companies in California.

A&R Solar

A&R Solar
Since 2007, A&R Solar has focused on building a company that prioritizes the good of people and the planet ahead of profit. A&R Solar is a registered Social Purpose Corporation, employee-owned business, and certified B-Corp.

We provide solar energy solutions to homeowners, businesses, non-profits, governmental entities, and utility customers across Washington and Oregon. These services include solar system design, procurement, installation, operation and maintenance (O&M), as well as battery storage installation and EV charging systems.

With over 4,000 solar installations (and growing) under our care in the Northwest, we provide services for the life of your system to help you meet your goals.

Harvest Solar

Harvest Solar

Founded in 2006 and based in Jackson, Michigan, Harvest Solar is an Engineering, Procurement, and Construction solar company offering turnkey solutions for agricultural, commercial, industrial, and utility-scale applications. Well known throughout the Midwest with a reputation for quality, Harvest Solar will design and install a dependable and long-lasting system tailored to achieve an array of custom energy needs.

Simple Power Solar

With over 50 years of combined experience, we at Simple Power Solar take pride in our ability to adapt to each client’s unique needs and provide quality systems that are efficient, aesthetically pleasing, and safe. Perhaps what sets the Simple Power Solar team apart from the rest is that we all love what we do. Solar is not just a job, it’s our passion and way of life. Our work speaks for itself.

Solar Energy Solutions

Solar Energy Solutions (SES) is the Midwest’s largest and most experienced solar design, engineering, and construction company, with projects in Illinois, Indiana, Kentucky, Ohio, West Virginia, Virginia, and beyond. SES is also the region’s leading Tesla Powerwall Certified Installer. Founded in Kentucky in 2006, Solar Energy Solutions has more than 2,500 active photovoltaic and battery storage projects in the Midwest’s residential, commercial, and utility arenas.



MaxSolar is a leading independent provider of Operations & Maintenance, Asset Management, and Technical Services for commercial distributed solar, battery storage, and EV charging systems.  As a comprehensive solar services provider, we offer an unparalleled level of service with programs customized for each of our client’s needs throughout the entire project lifecycle. MaxSolar programs ensure that our clients receive the maximum energy, environmental, and financial benefits from their renewable energy assets.