100 Prozent Erneuerbar Stiftung

What 100 Prozent Erneuerbar Stiftung does

100 prozent erneuerbar stiftung is a German civil-law foundation (Stiftung des bürgerlichen Rechts) founded in 2010 by Matthias Willenbacher, with its legal seat in Gerbach, Rhineland-Palatinate and its operational office at Torstraße 178, Berlin. The foundation's mission is to promote a decentralized, community-based, and nature-compatible energy supply from renewable sources, organized around three pillars: understanding the energy transition, shaping it, and communicating about it. Its core question — 'What do people gain from the energy transition?' — frames all activity around citizen participation, social sustainability, and equitable distribution of Energiewende benefits rather than technology deployment.

The foundation's product portfolio comprises four categories: knowledge platforms (SolarWiki, a multi-party solar installation terminology wiki, and the Energiewende-O-Mat, an interactive engagement tool); research projects and feasibility studies (dynamis with eon Stiftung, ENGAGE on social innovation, the Soziales Nachhaltigkeitsbarometer panel survey, Renewable Power-to-Heat in Hajnówka, Renewable Power-to-Heat in Bitola Region, and RENALDO in rural Poland); policy papers and publications (issued free of charge as PDF downloads); and communication campaigns including #kannstduauch and 'Neue Kraft mit der Nachbarschaft'. The foundation is also a co-founder and active board participant of Bündnis Bürgerenergie (BBEn), a coalition of over 200 member organizations representing more than 500,000 energy citizens.

The business model is non-commercial: the foundation is tax-exempt (confirmed by the Kaiserslautern tax office on 7 December 2023) and funded through project grants (EUKI, Stiftung Mercator, GIZ), donations, and EU/government research funding rather than product sales. All publications and tools are distributed free of charge via direct digital download and project partnerships. Distribution is hybrid — global digital access for publications and the SolarWiki, with regional project partnerships delivering feasibility outcomes to municipalities in Germany, Poland, and North Macedonia. The organization operates with 1–10 employees under founder Matthias Willenbacher and, since April 2025, Chief Communication Officer Sonja Wiesner.

Name

100 Prozent Erneuerbar Stiftung

Legal name

100 prozent erneuerbar stiftung

Website

https://www.100-prozent-erneuerbar.de

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

German non-profit foundation that promotes a decentralized, community-based renewable energy transition through policy papers, research projects, knowledge platforms (SolarWiki, Energiewende-O-Mat), and international feasibility studies serving municipalities, energy cooperatives, and research institutions.

Ownership category

akta.pro rank

Product category

Renewable Energy Advocacy and Energy Transition Research

NAICS

Environment, Conservation and Wildlife Organizations (813312), Social Advocacy Organizations (8133), Religious, Grantmaking, Civic, Professional, and Similar Organizations (813)

SIC

Services-Membership Organizations (8600)

akta.pro primary industry

Renewable Energy & Clean Tech Access (Off-grid, Energy Poverty Solutions) (BPAGALAE)

akta.pro secondary industry

Carbon Policy Interface for Renewables (ETS/Offsets/Carbon Taxes) (EUAMANAI)

Keywords

• Renewable energy advocacy
• Energy transition research
• Citizen energy cooperatives
• Decentralized energy policy
• Decarbonization publications

Headquarters

HQ city

Berlin-müggelheim

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations

Revenue model

1. Foundation Operations: As a registered non-profit foundation under German civil law, the organization operates through project funding, grants, and donations rather than commercial revenue. They conduct funded research projects (EU-funded, government-funded) and publish studies and policy papers. The foundation received tax-exempt status confirmation from the Kaiserslautern tax office.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

100 Prozent Erneuerbar Stiftung operates as a non-profit foundation that produces and disseminates knowledge, research, and policy recommendations to advance a decentralized, community-based renewable energy transition in Germany and internationally. Its core deliverables include digital knowledge platforms (SolarWiki, Energiewende-O-Mat), policy papers and studies on municipal heat planning and coal-region decarbonization, transdisciplinary research projects (dynamis, ENGAGE), international feasibility studies (Renewable Power-to-Heat in Hajnówka and Bitola), and communication campaigns targeted at citizens and municipalities.

Product overview

The 100 Prozent Erneuerbar Stiftung is a German foundation focused on energy transition for all ("Energiewende für alle"). The foundation operates a portfolio of knowledge platforms (SolarWiki, Energiewende-O-Mat), research projects (dynamis, ENGAGE, Soziales Nachhaltigkeitsbarometer), international feasibility studies (Renewable Power-to-Heat in Bitola and Hajnówka, RENALDO), and communication campaigns (#kannstduauch, Neue Kraft mit der Nachbarschaft). It also supports the Bündnis Bürgerenergie alliance and publishes policy papers and studies. The foundation's work is organized around three pillars: understanding the energy transition, shaping it, and communicating about it.

Differentiator

Problem solved

Functional benefit

Products and services

• SolarWiki

Quantifiable outcome

• 84% potential CO2 emission reduction through renewable power-to-heat conversion in Hajnówka district heating system
• +2 more outcomes

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

Eleven partnerships are on record, tiered core, major and minor.

• innogy stiftung für Energie und GesellschaftcoreStrategic or Co-development Partner · 1 January 2016Partnership for the dynamis project (2016-2020), which focused on social sustainability in the energy transition. The cooperation developed dynamis Labs to test new ideas for a decentralized and digitalized energy world with citizens. Now known as eon Stiftung.
• Bündnis Bürgerenergie (BBEn)coreStrategic or Co-development Partner · 1 January 2014Co-founded in January 2014 together with ten other organizations. BBEn advocates for decentralized energy transition in citizens' hands. With over 200 members representing over 500,000 energy citizens. The foundation was active in BBEn's board and supervisory board until 2025.
• GIZ GmbH (German Society for International Cooperation)majorImplementation/ SI/ Consulting PartnerImplementing partner for the RENALDO project (12/2020-03/2023) focused on establishing energy cooperatives in rural Poland.
• Kujawsko-Pomorski Ośrodek Doradztwa Rolniczego (KPODR)majorStrategic or Co-development PartnerPolish project partner for RENALDO, providing agricultural extension services and supporting energy cooperative development in rural Poland.
• ACTIVUS Foundation (Poland)minorStrategic or Co-development PartnerPolish project partner organization for the RENALDO energy cooperative development project.
• GAUSS Institute (North Macedonia)majorStrategic or Co-development PartnerProject coordinator in North Macedonia for the Renewable Power-to-Heat in Bitola Region project (11/2023-10/2025). The project examines converting a fossil fuel heating network to renewable energies in the coal-dependent Bitola region.
• Institut für transformative Nachhaltigkeitsforschung (IASS)minorStrategic or Co-development PartnerResearch partner for the Soziales Nachhaltigkeitsbarometer project, conducting annual panel surveys on social acceptance of energy transition.
• Bundesverband Deutscher StiftungenminorGTM or Marketing PartnerMembership organization for German foundations, providing networking and advocacy for foundation sector.
• Netzwerk Energiewende Jetzt!minorGTM or Marketing PartnerNetwork organization for energy transition advocacy. The foundation is a member and supports the network's activities.
• Powiat Hajnówka (Poland)majorStrategic or Co-development PartnerDistrict (Landkreis) in eastern Poland, partner in Renewable Power-to-Heat feasibility study. The town is located near the UNESCO Białowieża National Park and sought to reduce coal dependency in its district heating system.
• Energieavantgarde Anhalt e.V.minorStrategic or Co-development PartnerAlliance of citizens, municipalities, and companies working on sustainable energy system reconstruction in Anhalt-Bitterfeld-Wittenberg region. The foundation coordinated projects in Reallabor Anhalt from 2013-2018.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Agora Energiewende: Berlin-based think tank focused on Energiewende policy; publishes policy papers, hosts stakeholder events, and engages in advocacy on renewable energy transition—overlapping mission and operating geography with 100 Prozent Erneuerbar Stiftung, though at much larger scale.
• Öko-Institut: Independent research institute based in Freiburg/Darmstadt that produces applied research on sustainability, energy, and climate policy. Directly comparable in publishing policy papers, conducting research projects, and providing independent expert commentary on Energiewende topics.
• Stiftung KlimaWirtschaft: German foundation focused on climate-economic transition, with member companies and policy advocacy on industrial decarbonization. Highly comparable structure and mission: a Stiftung publishing policy positions and convening stakeholders around climate/energy transition.
• Heinrich-Böll-Stiftung: German political foundation affiliated with the Greens, with major programs on climate and energy policy including Energiewende advocacy, international energy cooperation, and CEE transition work. Comparable as a Stiftung publishing policy papers, funding international projects, and engaging on citizen participation in energy.
• REScoop.eu: European federation of citizen energy cooperatives, directly addressing the same community/decentralized energy transition mission as 100 Prozent Erneuerbar Stiftung and its BBEn network. Comparable in advocating for citizen-owned renewables and energy democracy.
• Energy Cities: European network of municipalities working on energy transition, with overlapping focus on municipal heat planning, citizen engagement, and city-level Energiewende implementation—a near-direct counterpart to the foundation's municipal heat planning and citizen participation work.
• Bundesverband Erneuerbare Energie (BEE): German federal association for the renewable energy industry, representing 50+ member organizations across wind, solar, biomass, and heat. Directly comparable in policy advocacy and stakeholder convening on Energiewende, though broader and industry-facing rather than citizen-focused.

Emerging players

• Clean Energy Wire: Clearinghouse and journalism service providing independent reporting and analysis on the Energiewende; partially overlaps with the foundation's knowledge dissemination role but focuses on media/journalism rather than direct advocacy or research production.

Broad incumbents

• BUND (Bund für Umwelt und Naturschutz Deutschland): One of Germany's largest environmental NGOs with broad advocacy on climate, energy, and conservation. Comparable as a German environmental advocacy organization publishing position papers and operating campaigns, though much larger and more diversified than the subject.
• NABU (Naturschutzbund Deutschland): Large German environmental NGO with significant work on renewable energy, nature-compatible energy transition, and citizen engagement in conservation. Directly comparable in its 'nature-compatible renewable energy' framing but operates at much larger membership and organizational scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UC9OOQuVeWFxjBjjHriljfBw/featured
• Facebookfacebook.com/100Prozenterneuerbar
• Instagraminstagram.com/100prozenterneuerbar

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about 100 Prozent Erneuerbar Stiftung