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Smart Photovoltaic Windows

Stellaris is developing ClearPower™, a fully-transparent, electricity-generating window. With its high power-density and transparency, ClearPower™ is uniquely designed to meet the urgent need for buildings to generate their own green electricity and stop using fossil fuels for heating. Our goal is to enable every window to be a power plant. Stellaris is currently pre-revenue and its technology is patent-pending and not yet available for commercial use.

This Reg CF offering is made available through StartEngine Capital, LLC. This investment is speculative, illiquid, and involves a high degree of risk, including the possible loss of your entire investment.

$381,877.34 Raised


The high transparency and power output per unit area of ClearPower™ has garnered enthusiastic letters of support from major glass manufacturers for its promising technology within the photovoltaic industry.

The global market for Building-Integrated Photovoltaic (BIPV) windows is expected to grow significantly (16.0% CAGR) and is projected to reach $13B by 2028.*

Stellaris currently holds three patents for photovoltaic device technology and has accrued more than fifteen years of experience developing solar photovoltaic (PV) equipment, during which we became a national first prize winner of the Cleantech Open, the world’s largest clean technology accelerator program.

*Market statistics provided by GlobeNewswire (source)

The Future is Clear™ with ClearPower™

Stellaris Corporation is developing ClearPower™, a transparent, solar electricity-generating window technology designed to decrease or eliminate building emissions of greenhouse gasses from the use of fossil fuels for space heating. 

As one of the first Building Integrated Photovoltaic Windows (BIPV) capable of providing both substantial power output as well as high transparency, ClearPower™ is positioned to be a powerful tool for electrifying buildings and reducing their dependence on fossil fuels. It is especially well suited for buildings in dense urban areas without sufficient space for solar or wind energy installations.

*The above clip features a ClearPower™ prototype. Product is not currently available for commercial use.

ClearPower™ is the culmination of more than fifteen years of work by Stellaris Corporation to address the urgent need for a way for buildings to generate their own clean electricity. Now, with testing from the National Renewable Energy Laboratory (NREL) corroborating our technology's performance and support for ClearPower's promising developments from international glass manufacturers, Stellaris is working towards an official commercial launch. 

The Problem

Buildings Are Among the Largest Emitters of Greenhouse Gasses

In 2020, the United States Environmental Protection Agency reported that buildings emit more greenhouse gasses than the transportation or power generation sectors. Buildings still rely heavily on fossil fuels for heating, yet as pressure mounts to reduce greenhouse gas emissions, many buildings, especially high-rise buildings, are left with limited options for obtaining green electricity to replace fossil fuels for heating. The need for so many buildings to have a source of clean electricity has created an urgent need for new clean electricity technology to enable buildings to self generate green electricity.

Existing photovoltaic windows have gained little traction due to their high cost, low power, and/or their lack of transparency. ClearPower™ addresses all of these issues with a power output approaching that of traditional high-efficiency, opaque photovoltaic (PV) modules, all while maintaining high transparency.

The Solution

ClearPower™ Will Be Able to Power Buildings’ All-electric Heating and Air Conditioning

ClearPower™ solar photovoltaic windows use narrow photovoltaic cells embedded in a window glazing. Due to the small size and orientation of the cells, ClearPower™ maintains high transparency while its unique design enables the production of up to 5 times more power than other "clear" BIPV windows. Its electrical output approaches that of a conventional high-efficiency, opaque PV module. ClearPower™ can be used as building windows while generating greenhouse gas-free electricity to power the building’s heating and cooling needs.

*The above image features a ClearPower™ prototype. Product is not currently available for commercial use.

The integrated high-efficiency solar cells act as louvers, blocking high-angle sunlight which reduces air conditioning loads. This is a significant additional energy-saving benefit.

Stellaris plans to develop high-speed, automated manufacturing for the ClearPower™ PV panels, which we will then outsource to contract manufacturers. This scalable, low capital approach will allow us to avoid the expense of building our own facilities while retaining the ownership of the high value technology assets by patent and trade secret protection.

The Market

Rapid Market Growth Expected as Pressure to Eliminate Emissions Increases

Around the country, laws are being passed by cities and states requiring both existing and new buildings to drastically reduce their greenhouse gas emissions by eliminating the use of fossil fuels for space heating, while building codes are prohibiting new natural gas hook-ups and requiring the inclusion of renewables for new buildings. With target dates for these ambitious goals only a few years away, many building owners and managers are feeling the pressure to find a solution.


Spurred by these regulations, the global market for Building-Integrated Photovoltaic (BIPV) windows is expected to grow substantially (16.0% CAGR) and is projected to reach $13B by 2028. Sized at $4.6B in 2021, Stellaris sees the nearly 3x market growth projection as validation of our technology's role within this renewable energy push.

Stellaris is targeting new construction and replacement markets both domestically and internationally for large-insulated glass windows, especially high-rise buildings with curtain-wall construction. We also see an immediate benefit for related applications such as clear railings and clear barriers. 

Our Traction

Stellaris is Garnering Industry Support for Our Promising Technology

We are truly excited about the latest iteration of our ClearPower™ design, as it’s already beyond what we hoped for when it comes to transparency, appearance, and performance - and other industry organizations share this sentiment.  

*The above image features a ClearPower™ prototype. Product is not currently available for commercial use.

Major glass manufacturers have shared their support for the ClearPower™ product due to its high transparency and power output per unit area, one citing it as a "promising technology" for the BIPV industry. Additionally, the National Renewable Energy Laboratory (NREL) has conducted independent tests of the ClearPower™ product that have corroborated Stellaris’s own performance testing. 

Stellaris currently holds three patents for photovoltaic device technology with additional patents pending, in addition to the extensive know-how and trade secrets we have learned over 15 years of developing solar equipment. During this time, Stellaris also became a national first prize winner of the Cleantech Open, the world’s largest clean technology accelerator program. 

Why Invest

An Exciting, New Technology Made to Address Climate Change

Stellaris believes ClearPower™ can play a critical role in the fight against climate change by reducing greenhouse gas emissions. As many building owners are facing legally mandated deadlines to decarbonize their buildings and regulations that require termination of the use of oil and gas for building space heating, we feel the timing is perfect for the introduction of our ClearPower™ solar photovoltaic window into the market. 

Funds raised from this campaign will be used to continue refining our product for commercial production, develop automated assembly procedures, manufacture and install ClearPower™ at test and beta sites, and continue to test the performance and durability of the product and to make continuous improvements in the product’s design and efficiency.

With help from the StartEngine community, we are determined to make Stellaris Corporation a go-to provider of clear, electricity-generating window components. Invest today in a scalable, cost-effective technology and join us as we seek to make a worldwide impact.

*The above windows shown are not BIPV windows and were not developed by Stellaris Corporation.


30 Technology Way Ste 1W3
NASHUA, NH 03060-2809

Stellaris is developing ClearPower™, a fully-transparent, electricity-generating window. With its high power-density and transparency, ClearPower™ is uniquely designed to meet the urgent need for buildings to generate their own green electricity and stop using fossil fuels for heating. Our goal is to enable every window to be a power plant. Stellaris is currently pre-revenue and its technology is patent-pending and not yet available for commercial use.


James B. Paull
James B. Paull
CEO, President, and Director

Jim is the founder of Stellaris and its CEO. Most recently, has been Senior Advisor for Distributed Resources at DNV, a global consulting firm dedicated to safeguarding life, property, and the environment. 

He holds AB and BE degrees in engineering from Dartmouth, a MS in engineering from Tufts, and a MS in management from UMass Lowell.

James W. Paull

James W. Paull

Director and Treasurer

James is currently Senior Business Development Manager for Good Harbor Group. Previously, he was Senior Vice President at GQR Global Markets and Business Development Executive at Medicus Healthcare Solutions. He has also been Operations Manager for Stellaris. James holds a BA from UMass Lowell.

Jeannette P. David

Jeannette P. David

Director and Secretary

Jen is Assistant Vice President and Claims Counsel for Sompo International. She was formerly Senior Claims Specialist at Liberty International Underwriters and a Senior Analyst at AIG. She holds a JD and a Masters degree in energy, environment, and natural resources from Vermont Law School and has a BA in environmental studies from Union.

Peter Morse

Peter Morse

Senior Design Engineer

Peter is a Senior Engineer sopecializing in in designing machines for automated production. machines. He is Principal Engineer at food processing machinery manufaturer Pearce Processing and was formerly Principal Module Area Engineer for Evergreen Solar. He has a BS in mechanical engineering from Tufts. 

Marco Endara

Marco Endara

Senior Production Engineer

Marco is in charge of solar cell and window component machinery operation, analysis and design. Prior to Stellaris, he was the Operations and Technical Manager for module assembly at Evergreen Solar. Marco has extensive experience in manufacturing operations, engineering and equipment controls design. He has a BS in electrical engineering from the City College of New York and an MBA from Worcester Polytechnic Institute.

Rob Janoch

Rob Janoch

Senior Manufacturing Engineer

Rob is a principal at Janoch Engineering. Recently, he was President of the solar testing equipment manufacture BrightSpot Automation, and fromerly was Senior Engineer at Evergreen Solar where he specialized in laser processing of solar cells. He has a BS in engineering and applied science from Yale and an MS in mechanical engineering from MIT.

Arnold Wallenstein

Arnold Wallenstein

Legal and administrative; Member Board of Advisors

Arnie is currently the Principal Member of the Enegry Law Group in Boston, MA. He was Senior VP and General Counsel for Advanced Power Services (NA) Inc. and was formerly Assistant General Counsel for Thermo Electron Corporation (now Thermo Fisher Scientific). He was a co-founder of Industrial Energy Corporation and was a member of energy law firms. He has over 40 years as a lawyer and legal executive for companies in the energy business. He holds a BA from University of Massachusetts, Amherst, an MS from the Harvard School of Public Health in Environmental Health Sciences, and a JD from Harvard Law School.

Craig Fifield

Craig Fifield

Senior Prototype Technician

Craig handles prototype design, construction and testing. Prior to joining Stellaris Craig worked as the Prototype Specialist for Robert Bosch LLC where he created working prototypes used in research and development of various automotive systems, with over 25 years of diversified design and fabrication experience. He has a BA degree from the University of New Hampshire and an AS degree in Furniture Design and Fabrication from the Wendell Castle School. 


Feb 21, 2023
$10k - $1.07M
Common Stock
non-voting common stock

Maximum Number of Shares Offered subject to adjustment for bonus shares

*Maximum Number of Shares Offered subject to adjustment for bonus shares. See Bonus info below.

Investment Incentives and Bonuses*


Friends and Family Early Birds

Invest within the first two weeks hours and receive 15% bonus shares

Super Early Bird Bonus

Invest within the first three weeks and receive 10% bonus shares

Early Bird Bonus

Invest within the first four weeks and receive and 5% bonus shares




5% Bonus Shares

5% Bonus Shares + Private Owners Group (bi-monthly investor newsletter, invitations to trade shows, and more)


10% Bonus Shares

10% Bonus Shares + Private Owners Group


15% Bonus Shares

15% Bonus Shares + Private Investor Call with Founder + Private Owners Group 


20% Bonus Shares

20% Bonus Shares + Private Investor Call with Founder + Private Owners Group

*All perks occur when the offering is completed.

Irregular Use of Proceeds

The Company might incur Irregular Use of Proceeds that may include but are not limited to the following over $10,000: Salary payments made to one’s self, a friend or relative. Any expense labeled “Travel and Entertainment”. Vendor payments.


Owners bonus
Stack Owner's Bonus & Rewards!

Members get an extra 10% shares in addition to rewards below!


Multiple investments in an offering cannot be combined to qualify for a larger campaign perk. Get rewarded for investing more into Stellaris.



Taesha Spire-Sweet

3 months ago

Are there any new updates to share with your investors?



Connor Robertson

7 months ago

Does it make you worried about the future since only 40% of the funding goal was reached? I am investor by the way! :) Thanks, Connor



David Schrift

7 months ago

Jim, Do you have any updates on the number of beta testers that have signed up and expected revenue from those contracts? Thanks



Size Thao

7 months ago

Can your panels be designed to have a radius or installed on a radius? How does that affect your efficiency?



Richard Koch

7 months ago

I grant you that photovoltaic windows is a smart idea, but from the 30,000 foot level, what makes your, "Smart Photovoltaic Windows" smart? And, how does the output of each window find its way into the input of the building and/or the greater power grid?



David Schrift

8 months ago

Hey Jim, Hoping you could try to answer my last question



David Schrift

8 months ago

Hey Jim, Help me understand why a building would choose your product over others. Efficiency, aesthetics and payback are likely major considerations. Do customers value efficiency the most especially to be in compliance with alot of the new legislation/green initiatives? Conversely, do aesthetics/payback play much bigger factors? For those that value efficiency the most do you have any research on what the market size would be. Any insight you have on internal research demonstrating who would prefer your product (compared to others) would be appreciated Thanks



Michael Coil

8 months ago

Hi, you aren’t asking for a whole lot barely a million dollars. What is this money being raised for?



Orion Torcellini

9 months ago

Thank you Jim, that single question puts you leaps and bounds ahead of the rest. As someone in the construction industry many seem to never think about what happens during a break or component failure. Dealing with glass and electronics is fickle and will require repairs. Will be happily investing now



Orion Torcellini

9 months ago

Can the window panes be replaced independently of everything else in the case of a break?




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