We help you save the planet, spend less & generate your own power with custom build solar panel solutions for your home or business

Ipsun Solar is inspired by a Latin word meaning “your own.” Why are we called Ipsun? We install solar panels allowing anyone to generate their own power.

The energy status quo goes like this: Customer gives money to the electric utility each month for power that is mostly from fossil fuels. Coal and gas power have consequences that are harmful to our communities and the environment.

Ipsun Solar offers the ability to make a quick, easy change: By producing your own power from solar, you will lock in low electricity costs from a cleaner source of energy, and you will add value to your home or business.

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Our Services and Territory

Ipsun Solar is a full EPC company. That’s engineering, procurement and construction of solar. We perform residential, commercial and utility-scale solar panel installations focusing on the Northern Virginia, Washington D.C. and Maryland area.

Getting work done to your property can be daunting. That’s why we pride ourselves on knowing the unique complexities of the solar industry and on designing custom-made solar PV systems for each client.

One of our co-founders is an electro-mechanical engineer. He designed one of the world’s first solar cars along with the Massachusetts Institute of Technology (MIT) over a decade ago. Rather than a one-size-fits-all solution, we use a flexible approach. No one should settle for less than custom solar.


We are a mission-driven company. What gets us out of bed every day is providing solutions to climate change, creating energy resiliency, and making lasting, meaningful impacts on our communities. Our company is growing fast, and we are a B Corporation! We are consistently reviewed well and rated highly for our integrity, honesty, and above all, a love for what we do.


Fighting climate change by installing as many solar panels as we can for our customers.

Our Team

Hervé Billiet


Co-founder and CEO

Herve is a renewable energy veteran. He first designed a solar car when he was 21 years old. Soon after, he was invited by MIT in Boston to advance its sustainable transportation initiatives. Herve then designed his first residential solar system in 2009. After working for a few consulting firms, Accenture among them, the U.S. Department of Energy hired him as a Strategy Consultant on the largest renewable energy projects in the world. He would later join forces with his business partner, Joe Marhamati, to establish Ipsun Solar.

Joe Marhamati


Joe has extensive experience in renewable energy project finance and energy efficiency policy development at the highest levels of government. At the White House, he served as an energy adviser to the President’s Chief Sustainability Officer. There he led both the Obama Administration’s Capital Solar Challenge and the President’s Performance Contracting Challenge. He also helped pioneer the deployment of clean energy technologies such as solar, wind, and geothermal through several billion dollars in financing.

Humza Arshad

Deputy Director of Engineering

Humza is a dedicated energy engineer with 8 years of experience in renewable energy sales and project management. Before working at Ipsun, he worked on UN-funded sustainability projects in Latin America. He is driven by his desire to promote clean energy, environmental equity, and investment in a sustainable future.

Carson McLean profile picture

Director of Engineering

Carson is passionate about renewable energy and has spent most of his career as a dedicated solar professional. After receiving his Bachelors in Environmental Science from the University of Colorado, Carson went on to work for Creative Energies, installing commercial and residential projects in Idaho and Wyoming. In 2015, after his time at Creative Energies, he joined the team at Namaste Solar in Denver, Colorado. He was a Project Manager and co-owner at Namaste Solar, overseeing residential projects in the greater Denver area. Carson brings his knowledge of the solar industry to the East Coast and continues his commitment to clean energy for a sustainable future with Ipsun Solar.

cindy mccabe solar pro

Project Manager

Cindy is an avid environmentalist who comes with 4 years of experience in renewable energy consulting and advocacy. She holds a Master of Environmental Policy from American University as well as a Master of Education from Rutgers University. Her proudest accomplishment is a successful environmental protection project that she completed while serving in the Peace Corps in Bolivia from 2005-2007. Originally from Bayonne, New Jersey, Cindy is fluent in Spanish, loves to play soccer, and volunteers with the Sierra Club, Peace Corps to Politics, and the Humane Rescue Alliance.

Erin Lee operations staff ipsun solar

Permitting and Interconnections Specialist

Erin is a graduate of the University of Tennessee, where she received her Bachelor of Science in Geology and Environmental Studies. She previously interned with the Tennessee Solar Energy Association, where she contributed to projects to promote solar energy usage throughout the state and became passionate about clean energy. She is excited to continue to work to promote renewable energy usage as a core member of our operations team.

nic klank project manager

Project Manager

Nic has an extensive background in sustainability and solar going back over ten years. He performed LEED certifications and consulting on commercial energy projects for six years before joining Tesla. At Tesla, he worked in nearly every aspect of solar both residential and commercial projects. He has experience in sales, surveying, permitting, logistics, installation, and inspection. Nic also has a degree in architecture and a certificate in building commissioning. He wrote his master’s thesis on the vulnerability of American infrastructure and how systems like solar and battery backups will become more and more important as we move into the future.

julien meyfroidt


Julien has been a member of our operations team since 2018 and prepares solar PV system designs for residential and commercial projects. Accomplished in software engineering and an expert with technical solar electric system characteristics, he works extensively in AutoCAD and solar industry-specific applications like Aurora.

patrick cavanaugh ipsun solar

Director of Sales

He’s a solar sales expert with more than 5 years in the solar industry in Virginia, North Carolina, and South Carolina. Working with homeowners, businesses, nonprofits, and government, he has helped hundreds of clients lower operating expenses and their carbon footprints. As a solar energy professional, he brings knowledge, experience, and strong values to every renewable energy project he undertakes. He is motivated by a desire to help grow the solar industry and to be a leading member of the renewable energy movement within the community he serves.

keegan dean ipsun solar

Sales Manager

Keegan joined our team in fall 2018, fresh from UNC Chapel Hill. He co-chaired the university’s Renewable Energy Special Projects Committee carrying out widespread energy-saving building improvements to control future costs and cut related emissions. He also excelled in a competitive internship with EDP Renewables in Texas doing utility-scale wind and solar project development. Here at Ipsun Solar, Keegan loves meeting DMV homeowners and business owners interested in going solar and helping them understand their project from every angle and settle on the best product and layout.

jarad asselin ipsun solar photo

Solar Energy Consultant

Jarad joined Ipsun in March of 2019. He has a bachelor’s degree in Cognitive & Brain Sciences from Tufts University and industry experience working as a research assistant at the Smart Electric Power Alliance (SEPA) where he conducted utility research on solar, energy storage, and demand response. Jarad is passionate about fighting climate change and helping DMV residents go solar.

daniel book sales dept

Solar Energy Inside Sales Representative

Since graduating from West Virginia University in 2015, Daniel has focused his professional career on transitioning the world to sustainable energy. He’s promoted electric vehicle adoption at Tesla, provided sustainably sourced meals at Founding Farmers, and is now with Ipsun helping power the area homes, businesses and organizations with sunshine! In his free time, Daniel likes camping, hiking, rock climbing, and anything else he can do out in nature. He’s always trying to protect the outdoors he appreciates, and appreciates all that others do to protect it too.

Carl Brown - Solar installer at Ipsun Solar

Field Operations Supervisor

Carl has been a volunteer firefighter and emergency medical and rescue technician since 2003. Since entering the field of solar energy services in 2015, he’s developed specializations in integrating inverters into residential solar retrofits and running electrical conduit. He’s passionate about safety and confident in a rooftop setting.

zhavonna price bullock

Director of Finance

Zhavonna join Ipsun Solar in April 2019. She’s a CPA candidate and Certified Bookkeeper that has a double Bachelors of Business Administration in Accounting and Business Management and is currently working on her M.B.A. in Accounting. She holds 21 years of experience in administration and accounting. Zhavonna is driven and passion about deliver high-quality work.

bobby monacella marketing manager

Marketing Manager

Bobby works on communications and marketing, helping to spread the message that going solar with Ipsun is a great way to join the renewable energy revolution. She comes to us with many years of PR and marketing experience from both the outdoor industry and the Virginia environmental and climate community. Bobby is co-leader of Mothers Out Front in Fairfax, VA, a non-profit group which focuses on providing present and future generations with a livable climate. Bobby loves that her job and her volunteer work go hand-in-hand, and feels strongly about advocating for solar freedom as a critical factor in solving the climate crisis.

Hannah Wiegard

Marketing Manager

Hannah works on communications and content writing for Ipsun Solar. She loves helping prospective solar clients connect to us. Hannah now has three years of solar marketing experience, the first two for a company based in the Carolinas. Hannah focuses on highlighting accessible, engaging solar success stories from real customers to help our solar movement grow. Hannah began her career promoting clean energy in 2010 as an organizer for the Alliance for Climate Protection and has also served in full-time campaign roles in Virginia with non profit organizations working to increase utility investment in energy efficiency, wind, and solar.

Solar Consultant

Elizabeth is a rising senior at the George Washington University studying public health and economics. Last summer she interned for the Chesapeake Climate Action Network and promoted legislation to double renewable energy in the state of Maryland, which recently passed the MD House and Senate. Elizabeth is interested in expanding the market for affordable, clean energy and creating jobs in the process.

Emma de Rinaldis intern ipsun solar


Marketing Intern

Emma is completing her Bachelor in Economics and management at Luiss Guido Carli, in Rome. She’s passionate about circular economy, renewable energy and sustainable and low-impact way of living. Trying to achieve a more international perspective about these issues, during her studies she attended some seminars about Analysis and Policies for Sustainable Development in Italy and about Green innovations in Finland.
javante solar lead

Solar Roof Lead

olson solar warehouse manager

Warehouse Manager

Mar'Sean Scott solar crew

Solar Crew Member

abdul zaheer solar tech

Solar Crew Member

john gardiner solar crew

Solar Crew Member

Tony- Solar installer at Ipsun Solar

Solar Crew Member

Andrew - Solar installer at Ipsun Solar

Operations Technician

Solar Crew Lead

zach courtney ipsun crew

Solar Crew Member


Helen Howes


Helen Howes is the  Former Managing Director – Safety, Health and Environment, Delta Air Lines, Inc and former VP, Environment, Health & Safety at Exelon Corporation ( Pepco). Helen helps steer Ipsun Solar towards a sustainable future.

Mark Denner Profile Picture


Mark Denner is the former Vice President  (VP) of Sun Edison and former Chief Operating Officer (COO) of Standard Solar. As Ipsun Solar is growing fast he helps keep the company on track to achieve great success both for the company and its customers.

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