About Us

Clean Power Research was founded by Thomas Hoff, Ph.D., as a consulting company focused on the economics of renewable energy. Since then, Clean Power Research has evolved into a world-class software company serving 10 of the top 10 Fortune 500 utilities and many of the world’s largest renewable energy companies.

Today we’re focused on expanding our impact with new software technologies that help solve the energy industry’s most challenging problems.


Jeff Ressler, CEO - Image of smiling man in a blue shirt on a green leafy backgroundJeff Ressler, CEO

Jeff Ressler is chief executive officer of Clean Power Research. In his more than ten years at the company, he has overseen the inception of the SolarAnywhere® and WattPlan® software families, and grown PowerClerk® from a nascent, online incentive processing tool into a powerful, general purpose energy program automation solution. A software industry veteran, he has a track record of delivering highly available cloud-based solutions to customers as well as deep experience building effective functional teams across engineering, product management, sales, marketing, business development, support and operations.

Jeff’s interest in the clean technology industry is driven by the fast pace of technical innovation and the opportunities to help inform markets about the value of renewable energy technologies. Seeing the parallels with the early software and PC markets, Jeff is applying his insight and expertise to delivering software solutions that quickly and cost-effectively evaluate the financial impact of renewable energy technologies.

Jeff’s career includes stints at both Oracle and Disney in addition to more than 10 years at Microsoft. During his tenure at Microsoft, Jeff served as Director of Product Management for Exchange Server and Lead Product Manager for SQL Server, among other roles. For more than two years, he was the speech manager for Bill Gates, who was Microsoft’s Chairman and Chief Software Architect at the time. Jeff holds a degree in Industrial Engineering from Stanford University.

Learn more about Jeff in his own words in this Suncast interview with Nico Johnson, “From Redmond to the Sun: Why Jeff Ressler Left Microsoft to Focus on Clean Energy.”

Tom Hoff, Founder and Chief Research Officer - Image of smiling man in a blue shirt on a green leafy backgroundTom Hoff, Founder and Chief Research Officer (CRO)

Tom Hoff is the founder and chief research officer of Clean Power Research. He’s a pioneer in the science of valuing distributed solar generation, and holds a number of patents in the area of PV fleet power estimation. Tom’s research is proving vital to utilities and ISOs faced with the challenge of maintaining reliability while integrating ever-increasing levels of PV generation on the grid.

Tom takes an analytical approach to problem solving and his mathematical models and methodologies are frequently integrated into the company’s commercial software products, making them readily accessible to the solar industry.

Tom’s passion for innovation in the area of clean energy system analysis has made him a sought-after industry speaker and consultant for the PV industry, and he has published extensively for more than 25 years. His numerous research topics include: valuation of photovoltaics and distributed generation, risk management and renewables and, most recently, methods to characterize PV output variability. In performing his research, Tom has been known to test hypotheses using the PV and electrical systems in his own home.

Tom began his career at Pacific Gas and Electric Company. He holds a Ph.D. in Engineering-Economic Systems from Stanford University’s School of Engineering.

Carlos Brito, VP of Engineering - Dark haired man in a black jacked on a green leafy backgroundCarlos Brito, V.P. of Engineering

As the vice president of engineering at Clean Power Research, Carlos Brito heads the engineering teams responsible for developing the company’s software services and managing the respective operational aspects.

Carlos’ interest in clean energy is driven by his belief in the energy transformation, where renewables and energy technologies play a key role in achieving a more sustainable future. Carlos is a big fan of electric vehicles, and like several of his teammates, drives one to work every day.

Prior to joining Clean Power Research, Carlos spent time as a founding member of an early-stage startup. Most of his professional experience comes from developing enterprise and consumer software products at Microsoft, where he worked for 15 years. While at Microsoft, Carlos lead development teams working on multiple releases of Microsoft Outlook® and the Windows® operating system. Carlos holds a degree in Computer Science from the Faculty of Science and Technology, New University of Lisbon, Portugal.

Alan Saunders, VP Sales & Business Development - Grey haired man in a blue sweater on a green leafy backgroundAlan Saunders, V.P. of Sales and Business Development

As the vice president of sales and business development, Alan leads account teams focused on helping our customers navigate the energy transformation. Alan’s team drives revenue for the company while identifying new market opportunities and seeking out partnerships that enable our SaaS products to solve enterprise-level problems for our customers.

Alan is a passionate veteran of the clean energy space and the utility business. Prior to joining CPR, Alan led global energy and utility industry strategy, product marketing and business development teams at design software leader Autodesk. Previously, Alan led initiatives in energy efficiency, system planning, operations and customer service for two leading utilities. Alan holds a degree in Mechanical and Environmental Engineering from the University of California, Santa Barbara.