Company Overview
Embrace eco-friendly living, save money, and produce your own energy with Ipsun Solar’s custom solar panel solutions for residential properties.
We provide a seamless transition to solar energy, enabling you to secure low electricity costs, benefit from a cleaner energy source, and boost your property’s value. Choose Ipsun Solar and transform the way you power your life.
Who We Are
Ipsun Solar, a comprehensive EPC provider, specializes in residential and utility-scale solar installations across Northern Virginia, Washington D.C., and Maryland. With expertise in the solar industry’s unique challenges, we create tailor-made solar PV systems for each client.
Co-founded by an electro-mechanical engineer who helped design one of MIT’s first solar cars, our company offers flexible, personalized solutions instead of a one-size-fits-all approach, ensuring you receive the custom solar experience you deserve.
Our Mission
Empowering a sustainable future through widespread solar panel installations, combating climate change one rooftop at a time.
Our Values
Driven by climate solutions, energy resilience, and community impact, our fast-growing B Corp thrives on integrity, honesty, and passion for our work.
Our Services and Territory
Ipsun Solar is a top EPC provider specializing in customized residential and utility-scale solar installations in Northern Virginia, Washington D.C., and Maryland. With expertise in the solar industry’s unique challenges, we deliver tailor-made solar PV systems.
Co-founded by an electro-mechanical engineer involved in designing MIT’s first solar cars, our company offers flexible solutions instead of a one-size-fits-all approach. Experience the exceptional service and results Ipsun Solar provides as we harness the power of solar energy for your home or business.
Meet the team fueling
solar solutions.

Herve 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
Co-founder
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.

Patrick Cavanaugh
Director of Sales
He’s a solar sales expert with more than 8 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.

Shannon Killebrew
Director of Shared Services
Shannon Killebrew joined Ipsun Solar in March of 2020. She holds a Bachelor’s Degree in Environmental Studies with a focus in Sustainability. Her love of the outdoors and interest in renewable energy sparked a strong desire to work in the solar industry. Prior to joining Ipsun, she began her career in the industry at a nationwide solar installer with a focus on permitting and inspections. She has many years of customer service experience and enjoys building strong working relationship with outside partners. Her role as the Shared Services Director at Ipsun Solar entails overseeing our Residential projects from design, permitting, inspection, and utility approval over many jurisdictions. She enjoys spending time her with family and pets, spending time outdoors and continuing to learn new technology to fight climate change.

John Mein
Solar Energy Consultant
John joined Ipsun Solar in March of 2020. His educational background includes a Master’s of Natural Resources Management from the Center for Leadership in Global Sustainability at Virginia Tech and a Bachelor’s in Sustainable Studies from Colorado Mountain College. John entered the Solar Industry in 2018 by completing a summer residency program at Solar Energy International and managing a solar installation company on the Western Slope of Colorado. He is passionate about family, food, and freedom, especially the type of freedom offered by solar energy. John previously worked for a ski area specializing in helicopter lifts to the top of the hill. He feels guilty about all the carbon emissions from his frivolous days in the mountains and seeks atonement by providing solar energy to all. Contact him at john.mein@ipsunsolar.com to help him clear his guilty conscience.

Maris Burns
Solar Energy Consultant
Maris joined Ipsun Solar in November of 2019. She is a graduate of George Washington University, where she studied Political Science. She has a particular interest in environmental policy and specializes in client relations and sales. She has previously worked as a constituent correspondence intern for former US Senator Bill Nelson and has years of experience in the service industry. She loves helping homeowners take the leap to go solar!

Dave Horan
Solar Energy Consultant
Dave joined Ipsun in June 2020 as a solar installer. He progressed to project manager and director of residential solar before transitioning to the sales side. Before Ipsun Solar, Dave ran his own design-build company installing aerial adventure parks and really long zip lines all around the country and even spent time as a licensed financial advisor. Dave may be the only solar professional you talk to who has carried panels up a three-story ladder, pulled wire in a 110-degree attic, and led an install crew. He can present solar options in clear, jargon-free terms–or he’s happy to get technical and nerd out about conversion ratios, panel degradation, and how battery storage works. Reach out at dave.horan@ipsunsolar.com.

Jane Nester
Solar Support Specialist
Jane has her bachelor’s degree in Earth and Planetary Sciences from Johns Hopkins University. Her coursework combined with a lifelong love of the outdoors has both fostered an interest in renewable energy and launched her career in solar with Ipsun. She is passionate about helping people unlock the potential of our sun while benefiting our environment.

Heather Albarano
Human Resources Specialist
Heather Albarano has devoted her entire career to optimizing HR operations, energizing cross-functional teams, and achieving new levels of organizational success. In leading major HR initiatives for diverse organizations, she has consistently boosted staff performance, improved employee satisfaction, and developed top-performing leadership teams. Heather has over 15 years of experience in Human Resources, including establishing best business practices while building out the HR function. She has a passion for sustainability and recently supported the Solar and Microgrid divisions at a Fortune 500 company.

Al Larsen
Senior Advisor for Governmental and Legal Affairs
Al has been a lawyer in private practice, focusing on energy and environmental matters, In Portland OR and Washington DC. His practice included legislative and administrative proceedings, as well as litigation, and project development, primarily wind and hydroelectric. He left private practice to join a West Coast wind energy company, where he was Sr. VP for governmental affairs and business development, and the deputy General Counsel. Most recently he was General Counsel and head of Congressional and public affairs for the Inspector General at the Environmental Protection Agency.

Bobby Monacella
Marketing Manager
Bobby works on communications and marketing, helping to tell Ipsun’s story, and show how 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 on the national leadership team of Mothers Out Front and is co-leader of her local MOF group in Fairfax, VA. MOF is a non-profit group that advocates for a livable climate for our kids. Bobby loves that her day job and her volunteer work go hand-in-hand, and feels strongly that working in solar energy is the best way to help her kids have a bright future.

Taryn Hightower
Inside Sales
Taryn joined Ipsun Solar in June of 2022. She received her bachelor’s degree in Human Communication from the University of Central Florida. Her previous experience includes working with brands to boost their sales and help them build client relationships. She is passionate about helping others invest in renewable energy for future generations to come!

Lisa Dolan
Inside Sales
Lisa has a bachelor’s degree in Finance from Suffolk University in Boston, MA. Before joining Ipsun she worked to attain federal grants for infrastructure improvements throughout the US providing improved water systems, better living conditions, help with homelessness, and internet availability. Her interest in renewable energy lies in providing healthier and cleaner living options now and for generations to come. She enjoys communicating with individuals and listening to their stories and helping them attain the quality of life they desire. My hope is to provide and motivate individuals with the tools needed to create a more sustainable, cleaner, and healthier environment. I strive to learn something new every day. As a parent, I encourage my kids to do the same. Life is a culmination of teachable moments and knowledge is good power. Like solar energy!!

Pickle
Chief Security Officer
Pickle hails from North Carolina and has been part of the Ipsun family since 2017. His duties include guarding the office, begging for treats and morning zoomies.
Speak To A Solar Energy Specialist
Take control of your energy costs and reduce your carbon footprint.
Our team of solar experts is here to help you harness the power of the sun with a custom solar panel system designed for your Northern Virginia, Maryland, or DC home. From start to finish, we make the process simple and hassle-free, ensuring that you can start enjoying the benefits of solar energy as soon as possible.
Take the first step towards a brighter, more sustainable future for you and your family.