Top 50 Renewable Energy Angel Investors (May 2026)

Portfolio highlights

• Mainspring Energy — Local power generation for the net-zero carbon grid.
• Heineken — Welcome to the global website for Heineken International. Find information about our company, history, brands, strategy and careers here.
• Inflection AI — We are an AI studio creating a personal AI for everyone.

Portfolio highlights

• Battery Pollution — Battery Pollution Technologies is establishing a national circular economy for lithium-ion batteries. Our comprehensive technology encompasses the entire lifecycle, from safe end-of-life management to eco-friendly repurposing and novel chemical recovery of critical battery materials.
• Dumaresq Solar Farm — Large Scale Solar Farm & Battery Storage Development based in northern NSW, Australia

Portfolio highlights

• Bavarva Estate — A family group of an investment company based in Western Europe & Central South Asia. The primary focus of work involves in renewable energy, manufacturing of automobiles goods, management consulting of large MNCs and industrial hubs.
• Habaple Limited — Building up a next generation utility service
• Punjab National Bank — Punjab National Bank is an Indian multinational banking and financial services company. It is a state-owned corporation based in New Delhi, India.

Portfolio highlights

• Galvanick — Secure industrial operations. Galvanick's industrial-first Extended Detection & Response (XDR) platform secures industrial systems and networks against cyber attacks.
• Nurdle AI — Get your AI into production Faster, Cheaper & Easier with Nurdle's privacy-safe lookalike data. Trusted by leading brands in gaming and social media.
• Harbinger — Founded by veterans of Canoo and Faraday Future, Harbinger is an automotive company that develops EV platforms optimized for medium-duty trucks and delivery vans.

Portfolio highlights

• Heliogen — Heliogen is a renewable energy technology company unlocking the power of sunlight to replace fossil fuels.
• NantKwest —
• Sienza Energy — Sienza Energy is developing a radical new approach to design and manufacture batteries. The company’s revolutionary strategy is based on a 3D nanotechnology electrode structure that takes advantage of advances in multiple fields over the last decade, providing an approach to battery design that is unique in the industry. By combining these advancesin an innovative way, Sienza can drastically improve the batteries’ energy and power densities — all with the goal of simultaneously reducing the overall battery costs. With this new approach, Sienza Energy can provide even more capability in a range of products, from smart devices to electric vehicles.

Portfolio highlights

• Rentberry — Find your next home for long-term rent in any country at Rentberry.
• AtomBeam — AtomBeam is a software company that is developing an artificial intelligence driven ecosystem of algorithms and computational paradigms that will transform the way data is transferred and stored, dramatically reducing the size of data transferred but without adding latency, using only modest computing power. This technology has profound benefitsfor a very large number of applications, in particular IoT and edge computing. The technology's advantages are unmatched and give it a wide range of uses: a) it can act on very small packet sizes, enabling it to stream data, b) computational latency is near zero, c) it is not sensitive to data errors, and c) it provides random file access. It has the potential to be virtually universal, especially in IoT.
• Pops Diabetes Care — If you are an employer, caregiver, or just someone who wants an easy diabetes management system, Click here to learn how we can help!

Portfolio highlights

• gridX — Combine powerful IoT and cloud infrastructure with flexible modules to build customized and cost-efficient digital energy solutions through XENON.
• Neptyne — Neptyne is making spreadsheets programmable
• Voltfang — Optimieren Sie die Effizienz und Nachhaltigkeit Ihres Unternehmens mithilfe unseres Second-Life-Batteriespeichers, aus E-Autobatterien.

Portfolio highlights

• Equipme — Gear up your teams to do their best work with Equipme. Simplify asset and cost management, and partner with best-in-class service providers for seamless service delivery.
• Ivy — We are building a global API for instant bank payments
• Twirl — Twirl is a platform for data teams that want to ship value rather than tooling. It enables the deployment of data pipelines from the start and manages all infrastructure and scaling. Twirl is a code-first company that combines analytics, machine learning, and everything in between.

Portfolio highlights

• Voltfang — Optimieren Sie die Effizienz und Nachhaltigkeit Ihres Unternehmens mithilfe unseres Second-Life-Batteriespeichers, aus E-Autobatterien.
• Heimladen — Heimladen is a renewable energy source that drives human mobility. They offer a platform that acts as a real estate partner, controls the charging infrastructure, and takes care of project planning while keeping costs low, and enabling tenants.
• Greenflash — Greenflash places a premium on quality, efficiency, and client happiness. We collaborate with world-class partners to deliver you high-quality components and cutting-edge technologies. Our customized energy solutions are tailored to your specific needs and circumstances in order to get the best potential outcome for you.

Portfolio highlights

• Pipe — Get up to the full annual value of your booked monthly and quarterly contracts. Scale your business without dilution or debt.
• Cache — Biomolecules are the next bits of the 21st century. So we're developing the first wet operating system for storing, accessing, and computing biomolecules at scale to make them widely accessible and useful. We're enabling the storage and access to the whole data universe—digital and biological—forever so that we don't have to deleteor dispose of anything ever again.
• Renaissance Fusion — Renaissance Fusion is a high-temperature superconductor and stellarator company.

Portfolio highlights

• Mast Reforestation — No-cost reforestation for post-wildfire burned acreage for landowners and foresters, funded by carbon removal credits.
• Sugarlogix — A precise reflection of human milk to provide the best nutrition for babies
• Mast Reforestation — No-cost reforestation for post-wildfire burned acreage for landowners and foresters, funded by carbon removal credits.

Portfolio highlights

• Voltfang — Optimieren Sie die Effizienz und Nachhaltigkeit Ihres Unternehmens mithilfe unseres Second-Life-Batteriespeichers, aus E-Autobatterien.
• Heimladen — Heimladen is a renewable energy source that drives human mobility. They offer a platform that acts as a real estate partner, controls the charging infrastructure, and takes care of project planning while keeping costs low, and enabling tenants.
• Greenflash — Greenflash places a premium on quality, efficiency, and client happiness. We collaborate with world-class partners to deliver you high-quality components and cutting-edge technologies. Our customized energy solutions are tailored to your specific needs and circumstances in order to get the best potential outcome for you.

Portfolio highlights

• ZunRoof — Buy solar systems at lowest price. Install solar rooftop to get lowest price and best quality solar panel, inverter, structure. Get a Solar Rooftop. Quality and subsidy assured. Reduce Electricity Bill by 100% by Going Solar. Make Money from Sun.

Portfolio highlights

• Arcadia — Arcadia unlocks access to global utility data. Our technology powers the next generation of climate solutions, giving anyone the tools to electrify and decarbonize.

Portfolio highlights

• Deciml — Deciml is an investment app in India that enables Indians to start investing young by investing the spare change from their online transactions. Download App.
• BankSathi — Earn Money online with Banksathi. Become a financial advisor and make a regular monthly income from home by sharing demat, loans & credit card leads.
• The Yarn Bazaar — The Yarn Bazaar is a Purpose-Led, Modern, Efficient, and Transparent managed Marketplace for yarn that allows yarn buyers and sellers to discover real-time yarn prices, information, and market trends in an instant. Our proprietary processes and flexible unsecured financing options enable yarn sellers to expand their reach and sales whilemaintaining higher margins, and buyers to discover and purchase high-quality yarn at unbeatable prices while reducing raw material and procurement costs, saving time, money, and effort.

Portfolio highlights

• REZA — Footwear & Apparel Brand
• Segna — Extract trends across your users. Build products that they love.
• Anility — Embed financial health insights within your application using our world leading API service

Portfolio highlights

• Praan — Praan builds the world's most advanced air purification technologies for commercial and industrial applications.
• Rooter — Rooter is an Indian game streaming platform that organizes multiple esports tournaments and owns many gaming IPs. It focuses on the massive mobile gaming market of more than 350 mn gamers. Conceptualized in 2016, Rooter was initially set up by Piyush and Dipesh Agarwal to build a strong community of sports fans around the world. But soon afterthe outbreak of COVID-19, Rooter forayed into game streaming to build one of the country’s biggest communities of gamers as well. Rooter has reached out to more than 23 mn users with an average user watching Live game streams daily for 26 mins. Rooter also runs the biggest community program to build the next million game streamers in India. Today Rooter is the biggest streaming platform in India available across Android, iOS, and Desktop.

Portfolio highlights

• Arcadia — Arcadia unlocks access to global utility data. Our technology powers the next generation of climate solutions, giving anyone the tools to electrify and decarbonize.

Portfolio highlights

• Vendia — Vendia is a multi-cloud serverless development platform that enables customers to share data and code in real-time across multiple clouds and companies.Vendia’s cloud and serverless native platform make that possible by delivering instant scalability and secure data sharing across multiple clouds at a fraction of the cost of traditionalsolutions.It was founded in 2020 and is based in San Francisco, California.
• Heliogen — Heliogen is a renewable energy technology company unlocking the power of sunlight to replace fossil fuels.
• AssetPlus — AssetPlus focuses on offering digital-first solutions to financial advisors and mutual fund distributors.

Portfolio highlights

• PHYSEE Technologies — We envision energy-neutral buildings, designed for well-being. We develop solar, sensor and coating technologies that activate glass for added value.

Portfolio highlights

• FOHAT — FOHAT, an Energy Intelligence company, is changing the energy sector with innovative solutions by allowing integration of distributed energy resources (iDER) and new solutions for energy trading (P2P TE).

Portfolio highlights

• Patch Technologies — We make carbon removal as simple as writing a few lines of code. Build sustainable products with ease and put your climate goals on autopilot.
• Remora — Carbon capture for semi-trucks
• Glacier — Glacier is the creator of the first affordable, high-performing, and space-efficient AI-enabled robot for recycling.

Portfolio highlights

• Warp — Warp is a Rust-based terminal reimagined to focus on productivity, efficiency, and speed. It is now available on MacOS. Warp has an IDE-like input area and it groups input and output together into atomic units. It also features Warp AI, which explains errors and suggests commands using AI.
• ArteraAI — Discover the power of Personalized Precision Medicine & AI Cancer Therapy with ArteraAI. Transforming cancer therapy through innovation.
• HiNOTE — Hinote is a unique, expressive method of mobile communication for people who enjoy flexing, staying still, and delighting.

Portfolio highlights

• Xeal — Xeal provides the world's most advanced electric vehicle (EV) charging stations designed for progressive multi-family apartments and businesses. Lead the change with self-managed sustainable amenities.
• WeaveGrid — WeaveGrid operates with utilities and owners of electric vehicles (EV) to allow and speed up transportation electrification. Using machine learning, optimization, and predictive analytics, the company's software solution solves several EV-grid integration challenges for utilities in a systems-oriented manner; helps integrate renewable energyresources on the grid; and saves utility customers' money on their bills.
• Distributed Energy — Distributed Energy is a renewable energy platform that matches Investors and Energy Customers. We offer a good IRR and stable returns for our investors.

Portfolio highlights

• Reka AI — Reka is an AI research and product company that develops models to benefit humanity, organizations, and enterprises.
• Socket — Socket fights vulnerabilities and provides visibility, defense-in-depth, and proactive supply chain protection for JavaScript, Python, and Go dependencies.
• Weights & Biases — Weights & Biases, developer tools for machine learning

Portfolio highlights

• Bardeen — Bardeen is an automation app to replace your repetitive tasks with a single shortcut and control your web apps from anywhere. Explore our integrations with your favorite apps and hundreds of pre-built playbooks that help you stay in the flow.
• TAU Systems — TAU Systems provides medical imaging technology.
• MILES — Carsharing nach Kilometern statt Minuten. MILES Autos und Transporter einfach per App mieten und losfahren!

Portfolio highlights

• Mast Reforestation — No-cost reforestation for post-wildfire burned acreage for landowners and foresters, funded by carbon removal credits.
• Alta Motors — Alta Motors designs and manufactures the most advanced electric vehicle technology on the planet. With our first product, The Redshift, we are creating a motorcycle that is faster and easier than anything else out there. An electric motor means smooth power delivery, instant throttle response and flat, endless torque.
• Mast Reforestation — No-cost reforestation for post-wildfire burned acreage for landowners and foresters, funded by carbon removal credits.

Portfolio highlights

• Praan — Praan builds the world's most advanced air purification technologies for commercial and industrial applications.
• Styledotme — Mirrar is a Augmented Reality (AR) SaaS platform from Styledotme which is the world's first Real time AR platform for Jewellery shopping.
• Trulymadly.com — Truly Madly is one of the best dating app in India connecting singles across the country. Make friends, meet new people, or find your forever with the Top Dating App Online by Truly Madly.

Portfolio highlights

• Numbat — Numbat is a clean-tech company from Kempten (Allgäu). The competence lies in the development and production, as well as the operation of High-Power charging solutions with integrated battery storage system. The goal is to establish Europe's densest High-Power charging infrastructure to support e-mobility and its challenges. The battery storagereduces electricity costs and eases the burden on grids, while the integrated fast charging station allows customers/visitors/employees to fully charge their electric vehicles within 15 minutes. Depending on the location, the Numbats can be provided free of charge in a platform model. With its patented climate protection technology and multi-lifecycle approach, the Numbat is the most sustainable solutions on the market.
• ESFORIN SE — ESFORIN SE is a fully digital energy company, offering modularly integrable energy solutions – for both, power and gas.
• Efficient Energy Technology — Photovoltaik mit Speicher zum Einstecken in der Steckdose - Mit deinem Balkonkraftwerk von EET produzierst du eigenen Sonnenstrom.

Portfolio highlights

• Reel Energy — Accelerate the transition to a society powered 100% by renewables. Reduce your company's carbon footprint with electricity from new solar parks and wind farms.
• Wrangle — Wrangle organizes requests in your Slack team channel. Automatically assign approvals and tasks for your team to follow up and track their status.
• Vue Storefront — Vue Storefront provides online shopping experiences like native apps, boosts site performance, & customization. Check other benefits!

Portfolio highlights

• Cardenxe Sotol — Artisanal Small Batch 100% Sotol Spirit Cardenxe Sotol is a terroir-inspired premium craft spirit, distilled from the heart of the Dasylirion plant, in North of Mexico - where it holds a Denomination of Origin. Every label (Desierto and Sierra) honors a different environment in which the plants used to distill grew.
• Terraformation — Terraformation creates partnerships to scale reforestation with hardware, software, and knowledge based solutions.
• Rebellyous Foods — Rebellyous Foods makes crispy, juicy, 100% plant-based nuggets. Your guests will love the taste. Your team will love the simplicity. Get Rebellyous with us!

Portfolio highlights

• Zeigo — Zeigo is a company formed by a team of like-minded clean energy & tech pioneers with a mission to help companies transition to a low carbon economy.
• Ecolectro — Ecolectro is solving the biggest challenges in making Green Hydrogen. Our alkaline ion-exchange membranes and polymers make clean fuel and decarbonize industry.
• Sniffer Robotics — Comprehensive methane emissions detection and quantification, advanced imagery and analytics; Sniffer Robotics provides advanced solutions that benefit the environment.

Portfolio highlights

• Leadoptik — Leadoptik is a California-based company is currently operating in stealth mode.
• Modality.AI, Inc. — Modality.ai is an AI-powered platform that detects health conditions using conversational AI. Through dialogue and video, Modality.AI interacts conversationally with the patient to provide health assessment anywhere, anytime. Its system analyzes multimodal data which allows continuous screening and assessing of patients’ health.
• Gray Oncology Solutions — Gray Oncology Solution is a healthcare enterprise software company that commercializes GrayOS, the operating system for oncology.

Portfolio highlights

• Praan — Praan builds the world's most advanced air purification technologies for commercial and industrial applications.
• Prevently — Prevently is a website that provides consumers with physician-reviewed health articles, physician-approved health products, health apps, and telemedicine consultations. These services centralize around an online patient profile that integrates data utilizing APIs from multiple personal health tracking devices.

Portfolio highlights

• Ware — Ware deploys autonomous, self-flying drones—combined with machine learning—inside warehouses to automate their inventory tracking. Designed to solve some of the $1.9 trillion warehousing industry’s most pressing issues, Ware’s product helps their customers operate more efficiently. A partner of Skydio and funded by Bloomberg Beta, Ware works withthe world’s largest 3PL’s and global brands to improve their accuracy, workflows, and save money.
• Radiant — Clean. Portable. Safe. Energy
• Replenysh — Replenysh is a set of tools for communities and companies to build circularity in days, not years.

Portfolio highlights

• Reel Energy — Accelerate the transition to a society powered 100% by renewables. Reduce your company's carbon footprint with electricity from new solar parks and wind farms.

Portfolio highlights

• Reel Energy — Accelerate the transition to a society powered 100% by renewables. Reduce your company's carbon footprint with electricity from new solar parks and wind farms.

Portfolio highlights

• Lhotse — Lhotse helps you optimize the costs you're not looking at by taking the hassle out of indirect spend. The next gen procurement & sourcing system.
• Ostrom — We make energy fair, smart and green - one flexible monthly plan with no hidden fees, digital-first and 100% renewable energy.
• bunch — bunch is the operating system (OS) for private market investing, handling digital entity creation, seamless investor onboarding and portfolio management. The company's platform focuses on saving time, money and mental energy by eliminating legacy intermediaries, overwhelming regulatory complexity, and low-tech administration.Operating acrosslegal structures, asset classes and jurisdictions allows bunch to fully unlock private markets for everyone, enabling businesses and investors to make private markets easy, cost-efficient and fast.

Portfolio highlights

• Tap Electric — Charging your car is not a uniform, quality experience. Information is scarce and often incomplete; availability is not optimized; and access may require different means and is often unnecessarily expensive. All the plans we have for scale and stabilizing the grid with EV, cannot be built reliably on such a UX.Tap's driver app enablesuniform information and payments across a huge network of chargers. Every charger in the app provides info about dynamic tariffs, AI-powered insights about availability and communication channels to share chargers efficiently.To help owners bring this driver experience to their charger network, Tap lets them connect their charger to the Tap Electric Operator Platform, at no cost - thanks to our fully automated product. This business model increases simplicity and profitability for owners.
• NewMotion — Discover our complete charging solutions for businesses and drivers at work, home and on the go, and join our sustainability movement with EV charging.

Portfolio highlights

• Agros — Agros exist to make farming economically viable and environmentally sustainable. The company provides farmers with carbon-reducing and income-increasing products and services, from input to market. Their unique ecosystem approach aggregates different low-carbon technologies, bundled with affordable finance, insurance, advisory and market access.Agros’ mission is to double the income of millions of farmers while reducing 100 megatons of annual carbon emissions.
• VFlow Tech — VFlowTech is a Singapore based company that aims to produce the world's best Vanadium Redox Flow Batteries to the power the sustainable future with pure renewable energy.
• TablePointer — TablePointer is the A.I. and intelligent energy solution for small & medium commercial facilities to optimise energy efficiency, manage assets, upgrade profitability, and unlock sustainability gains right away.

Portfolio highlights

• Giza — Giza changes this by using zero-knowledge cryptography to bring model inferencing on-chain, unlocking a new depth for smart contract design.
• Argent — Argent gives you the best of Ethereum for a fraction of the cost. Easily buy, earn, stake and invest crypto.
• Kinetix — Kinetix is a no-code 3D creation tool that leverages artificial intelligence motion capture to convert videos into 3D animations.

Portfolio highlights

• ClimateAI — Build climate resilience with accurate insights and actionable recommendations that will give you a competitive edge.
• WeaveGrid — WeaveGrid operates with utilities and owners of electric vehicles (EV) to allow and speed up transportation electrification. Using machine learning, optimization, and predictive analytics, the company's software solution solves several EV-grid integration challenges for utilities in a systems-oriented manner; helps integrate renewable energyresources on the grid; and saves utility customers' money on their bills.
• The Happy Home Company — The Happy Home Company is your Personal Home Manager. Managing your home is expensive, complicated, and time consuming. They solve this problem by connect homeowners with an affordable Personal Home Manager, who is supported by powerful technology, and a trusted service network

Portfolio highlights

• Praan — Praan builds the world's most advanced air purification technologies for commercial and industrial applications.

Portfolio highlights

• Arcadia — Arcadia unlocks access to global utility data. Our technology powers the next generation of climate solutions, giving anyone the tools to electrify and decarbonize.

Portfolio highlights

• Leverage — Answering the Fundamental Question: "Where
• Regent — We build all-electric, passenger-carrying, wing-in-ground-effect vehicles to service coastal routes with technology available today.
• Bequest Finance — Compliant, easy and non-custodial digital asset management.

Portfolio highlights

• Pogo — Unlock the power of your data to earn and save on shopping, finances and more. Download the Pogo app today to start earning and saving cash. 4.9 stars in the App Store.
• Pogo — Unlock the power of your data to earn and save on shopping, finances and more. Download the Pogo app today to start earning and saving cash. 4.9 stars in the App Store.
• Somethings — We connect your teen with a professional, trained 20-28 year old mentor who supports your teen via text and video call whenever they need. Start today.

Portfolio highlights

• Agnikul — Agnikul is a space tech startup that designs, manufactures, tests, and launch orbital-class rockets for micro and nanosatellites. They currently work out of the National Center for Combustion R&D at IIT-Madras. Rocket scientists, engineers, ex-bankers and space lawyers are a part of their team. This unique blend of people is one of theirbiggest strengths. The company was founded in 2017 and is based in Chennai, Tamil Nadu.
• Log 9 Materials — Log 9 Materials Scientific Private Limited is a graphene research and development company. At Log 9 Materials we are determined to accelerate the commercialization of graphene nanotechnology. We have just developed the first commercial product on graphene- 'Smoke-safe'. This innovative graphene based cigarette filter reduces the risk ofgetting cancer by 90%. We offer a wide range of graphene (CVD graphene, rGO) and its derivatives. We bring to you graphene as researchers and not just manufactures, so we understand the triviality of the grade of our products.
• Toffee Ride - Learning App for Classes I - IV — Toffee Ride is a learning App that is singularly focused on helping your child develop a thorough understanding of fundamental concepts.

Portfolio highlights

• Ackcio — Ackcio builds real-time, reliable, wireless, monitoring solutions for industrial applications.
• PixCap — PixCap - Web-based editor. Easily create 3D designs. We ship with thousands of assets, animations, poses, and characters to help you quickly get started. Best 3D software with no downloads for designers.
• VFlow Tech — VFlowTech is a Singapore based company that aims to produce the world's best Vanadium Redox Flow Batteries to the power the sustainable future with pure renewable energy.

Portfolio highlights

• Vendia — Vendia is a multi-cloud serverless development platform that enables customers to share data and code in real-time across multiple clouds and companies.Vendia’s cloud and serverless native platform make that possible by delivering instant scalability and secure data sharing across multiple clouds at a fraction of the cost of traditionalsolutions.It was founded in 2020 and is based in San Francisco, California.
• Heliogen — Heliogen is a renewable energy technology company unlocking the power of sunlight to replace fossil fuels.
• AssetPlus — AssetPlus focuses on offering digital-first solutions to financial advisors and mutual fund distributors.

Portfolio highlights

• Statsig — Statsig is a modern feature management and experimentation platform that empowers teams to 10x their experimentation velocity, shipping every feature in a data-driven way.
• Clearbrief — Do Justice to the Facts. Select any sentence in your Word doc, and our AI instantly finds the best evidence you have to support your argument. 1-Click TOA.
• Saturn Technologies — The best way to share time with friends