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.

What our Customers say


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

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Our Team

Hervé Billiet


Co-founder and CEO

Herve is a renewable energy veteran and a Master Electrician. He designed the first Belgian 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 and installed 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. Herve grew Ipsun Solar from a small local installer to a major installer in Northern Virginia, Washington DC, and Maryland doing both residential and commercial solar and advocacy for solar. Herve loves building the team of passionate solar enthusiasts.

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.

Chris Sewell


Chief Operating Officer

Chris has worked in renewable energy and carbon markets since 2008. He is an experienced program manager and entrepreneur successfully building teams, growing budgets, and accomplishing results. At the IDB he managed a multi-million dollar sustainable energy program that resulted in the bank carving out a US $5 billion finance commitment to renewables in Latin America. He co-founded and ran a small consulting firm supporting small project developers in preparing financial models and investor presentations. He joins Ipsun Solar to help get as much solar installed as possible and is passionate about the power sector’s role in creating a decentralized, affordable, renewable energy future for everyone.

Brent Walker

Director of Electrical and Safety

Brent’s expertise is in the electrical distribution of data centers. As a Master Electrician, his most recent project was on the 2019 rehabilitation of the WMATA. Brent managed 75 electricians on this $17M project with a tight deadline of 100 days. Since joining Ipsun as Senior Commercial Project Manager, Brent oversaw the 9th largest solar project in DC, Ipsun’s largest project to date. Now as Ipsun’s Director of Electrical and Safety, Brent manages all Powerwall installations and electrical tie-ins for both residential and commercial projects. Additionally, he trains all Ipsun employees in safety protocols and implements new safety strategies as well as new project execution strategies between design, material handling, and installation.

Patrick Cavanaugh Sales Director

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.

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.