AENU

Founded in Berlin, Germany, AENU is an impact fund driving systemic transformation in venture capital by focusing on long-term investments in early-stage European climate-tech and social impact companies.

Siobhan Brewster

Partner

Fabian Heilemann

Founder and CEO

Ferry Heilemann

Partner

Zoe Magee

Director Communications

Melina Montañés

Principal

Past deals in Renewables

EPYR

Pre Seed Round in 2025
EPYR is an energy technology company specializing in large-scale industrial decarbonization. It develops and operates thermal energy storage (TES) systems, providing clean, cost-effective, and scalable high-temperature heat for industrial applications. This enables businesses to transition from fossil fuels, lower energy costs, and reduce their carbon footprint, thereby accelerating the global shift towards renewable energy.

ERS - Ecosystem Restoration Standard

Seed Round in 2024
ERS develops a global standard for certifying nature-based ecosystem restoration projects. It empowers small-scale, community-led initiatives that combat climate change, enhance biodiversity, and improve livelihoods. The standard integrates advanced digital monitoring, reporting, and verification techniques to ensure traceability and transparency.

Voltfang

Series A in 2024
Voltfang specializes in repurposing used electric vehicle batteries into stationary energy storage systems for private homes. By integrating recycled traction batteries, the company aims to create a decentralized storage network, facilitating renewable energy usage and grid stabilization.

Trawa

Seed Round in 2024
Trawa offers software solutions and matching electricity procurement services for energy-intensive businesses. Its proprietary optimization engine enables companies to access renewable energy from solar and wind parks, helping them decarbonize operations while saving costs and mitigating future energy risks.

Ember

Series A in 2024
Ember operates electric bus networks, offering zero-emission, convenient, and affordable travel. Its tech-led approach manages timetabling, ticketing, charging, and maintenance, delivering improved service at lower cost. Over 10,000 weekly customers use Ember's services.

AtmosZero

Series A in 2024
AtmosZero is a company that has developed a modular electrified boiler designed to convert existing heat in the air into decarbonized steam. This innovative technology aims to significantly reduce energy consumption by utilizing as little as half the electricity required by conventional electric boiler systems. By focusing on decarbonizing industrial process steam, AtmosZero enables businesses to substantially decrease their carbon footprint, potentially eliminating one-quarter of industrial emissions. The company's approach represents a key advancement in the effort to achieve more sustainable industrial heating solutions.

Metris Energy

Pre Seed Round in 2024
Metris Energy is a pioneering platform that employs artificial intelligence to facilitate renewable energy adoption for commercial property owners. Its primary objective is to transform every commercial building into an efficient power plant, making solar energy installation profitable and hassle-free for business owners.

AtmosZero

Seed Round in 2023
AtmosZero is a company that has developed a modular electrified boiler designed to convert existing heat in the air into decarbonized steam. This innovative technology aims to significantly reduce energy consumption by utilizing as little as half the electricity required by conventional electric boiler systems. By focusing on decarbonizing industrial process steam, AtmosZero enables businesses to substantially decrease their carbon footprint, potentially eliminating one-quarter of industrial emissions. The company's approach represents a key advancement in the effort to achieve more sustainable industrial heating solutions.

UNDO

Venture Round in 2023
UNDO is a world-leading carbon dioxide removal project developer specialising in enhanced rock weathering. UNDO focuses on permanent carbon removal by utilizing enhanced rock weathering to capture CO2 from the atmosphere. The company spreads crushed silicate rock on agricultural land, accelerating the natural weathering process and enriching soil health.

Voltfang

Seed Round in 2023
Voltfang specializes in repurposing used electric vehicle batteries into stationary energy storage systems for private homes. By integrating recycled traction batteries, the company aims to create a decentralized storage network, facilitating renewable energy usage and grid stabilization.

Agreena

Series B in 2023
Agreena operates a soil carbon platform to scale regenerative agriculture through finance and technology. The company verifies, mints, and sells carbon credits generated by farmers, issues third-party verified carbon certificates, and provides software that combines ground-truth data, satellites, artificial intelligence, and advanced analytics to detect key regenerative agriculture metrics at scale. Its approach links financial support with measurement and verification to help farmers increase profitability and resilience while enabling businesses to advance sustainability goals and contribute to broader environmental outcomes.

Hometree

Series A in 2022
Hometree is a home energy services company focused on facilitating the transition to low-carbon living for homeowners. It provides a range of services including the installation, repair, and financing of renewable energy technologies and energy-efficient heating systems. Hometree aims to simplify the process of adopting sustainable home improvements by offering comprehensive home emergency insurance and maintenance coverage through convenient online subscription plans. This approach allows homeowners in the United Kingdom to manage their energy consumption effectively while ensuring that the entire lifecycle of energy solutions—from installation to ongoing maintenance—is comprehensively supported.

XFuel

Venture Round in 2022
XFuel is a company focused on producing sustainable and net-zero advanced fuels for the road, marine, and aviation sectors. Founded in 2010 and headquartered in Dublin, Ireland, with additional operations in Palma de Mallorca, Spain, XFuel has developed innovative technology for the efficient conversion of biomass waste into low-carbon fuels. This process results in a clean, drop-in fuel that can be utilized by distributors and consumers globally, offering a cost-effective alternative to traditional fossil fuels. XFuel's production methods lead to up to 85% fewer greenhouse gas emissions compared to conventional fuel production, with a clear pathway towards achieving carbon-neutral and carbon-negative fuel solutions.

Tomorrow

Funding Round in 2022
Sustainable banking. Green Finance. A credit card that is ecological, ethical and uses your money to generate a positive environmental impact. A bank that funds and promotes Renewable Energy, Solar Power, Wind Power and sustainable agriculture.

Tomorrow

Funding Round in 2022
Sustainable banking. Green Finance. A credit card that is ecological, ethical and uses your money to generate a positive environmental impact. A bank that funds and promotes Renewable Energy, Solar Power, Wind Power and sustainable agriculture.

Voltfang

Pre Seed Round in 2022
Voltfang specializes in repurposing used electric vehicle batteries into stationary energy storage systems for private homes. By integrating recycled traction batteries, the company aims to create a decentralized storage network, facilitating renewable energy usage and grid stabilization.

Running Tide

Series B in 2022
Running Tide optimizes aquaculture techniques to produce healthy, low-carbon protein while analyzing ocean data for carbon removal solutions.

TESVOLT

Series B in 2022
TESVOLT GmbH, founded in 2014 and based in Wittenberg, Germany, specializes in the manufacture of lithium battery storage systems aimed at the commercial and industrial sectors. The company is recognized as a leader in energy storage solutions within Germany and Europe, focusing on enabling businesses to reduce their energy dependency and contribute to the energy transition. TESVOLT produces intelligent storage systems with capacities ranging from 10 kilowatt-hours to multiple megawatt-hours, ensuring high quality and TÜV-certified safety. Its products can integrate with various renewable energy sources, including solar, wind, and biogas. The company operates a carbon-neutral gigafactory for series production and has received numerous accolades for its innovations, including the German Entrepreneur Award and the TOP 100 “Innovator of the Year.” Co-founders Daniel Hannemann and Simon Schandert leverage their extensive experience in the photovoltaic sector to advance the development of economical and efficient storage solutions.

Zolar

Series C in 2022
Zolar is a Berlin-based company that designs, installs, and provides online tools for residential solar and battery systems. Through an online configurator, homeowners can specify system size and components, access planning data for their property, and receive guidance from solar energy experts, with installation handled by a network of local partners. The business combines solar generation, storage, and mobility to support energy-independent homes and to help households reduce their carbon footprint. Founded in 2016, Zolar aims to simplify the transition to private energy provision by enabling customers to generate green electricity for their own premises and participate in climate protection through distributed energy projects. The company operates across Germany and offers planning, advice, and on-site installation to deliver a turnkey solar solution for residential properties.

Zolar

Series B in 2021
Zolar is a Berlin-based company that designs, installs, and provides online tools for residential solar and battery systems. Through an online configurator, homeowners can specify system size and components, access planning data for their property, and receive guidance from solar energy experts, with installation handled by a network of local partners. The business combines solar generation, storage, and mobility to support energy-independent homes and to help households reduce their carbon footprint. Founded in 2016, Zolar aims to simplify the transition to private energy provision by enabling customers to generate green electricity for their own premises and participate in climate protection through distributed energy projects. The company operates across Germany and offers planning, advice, and on-site installation to deliver a turnkey solar solution for residential properties.

Trawa

Trawa offers software solutions and matching electricity procurement services for energy-intensive businesses. Its proprietary optimization engine enables companies to access renewable energy from solar and wind parks, helping them decarbonize operations while saving costs and mitigating future energy risks.
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