Transforming Renewable Energy Accounting: Soldera’s Simplified GOs to Accelerate Energy Transition

• Tallinn-based Soldera attracts another EUR 1.6M to further automate renewable energy certificate management with AI
• The platform unifies over 30 national registries, boosting revenue for producers and credibility for buyers
• The team is active in ecosystem initiatives including RECS, I-REC(E), and 24/7 CFE, shaping evolving global energy certificate standards
• With new funding, Soldera plans to expand talent, aiming for billion-dollar growth

This January, Soldera—the well-known Estonian platform for managing and exchanging renewable energy Guarantees of Origin (GOs)—announced raising another EUR 1.6M. This non-dillutive funding came through the EAS Applied Research Grant and follows Soldera’s EUR 2.5M round that the startup landed in March 2025.

Soldera and GOs in a Nutshell

The Estonian climate-tech startup was founded in 2023 by Stenver Jerkku (CEO) and Al William Tammsaar (CPO) to tackle the complex, often bureaucratic world of renewable energy certificates in Europe. The company’s core product is an AI-powered platform that automates the management, trading, issuance, and retirement of Guarantees of Origin (GOs) and other energy certificates — crucial instruments that verify and monetise renewable electricity production. By unifying access to more than 30 national registries, many of which still rely on manual spreadsheets or paper-based processes, Soldera significantly reduces administrative overhead and improves revenue for renewable energy producers across the continent.

To reiterate, Guarantees of Origin (GOs) are EU’s digital certificates that prove one megawatt-hour of electricity was generated from a renewable source like wind or solar. Because all electricity mixes in the grid, it’s impossible to trace ‘green electrons’ and so GOs act as an accounting system that separates the environmental attribute from the power itself. These certificates are sold, bought, and retired to credibly claim renewable energy use, creating extra revenue for clean power producers and financial incentives for further renewable investment.

Climate Accounting

Soldera also publishes impact metrics and integrates climate accounting frameworks into its platform. Particular attention gets paid to ‘disclosure’ frameworks that have specific Energy Attribute Certificate (EAC) sourcing rules and requirements. Corporate renewable buyers can already use AI to match their electricity consumption with the right certificates within the Soldera platform.

‘We don’t just want to be another ‘climate accounting’ tool. As we continue to integrate frameworks like this, we will only do so intuitively, when the demand is there, and in a user-friendly way,’ Soldera’s growth marketing lead Oliver Bollanack states.

Seed Round and Rapid Growth

In March 2025, Soldera raised EUR 2.5M in Seed funding led by Lifeline Ventures, joined by Skaala and Lemonade Stand. Convinced by the founding duo’s decade-long track record in climate-tech (including E-agronom and Solid World), the investors were enthusiastic to empower Soldera’s rapid product development and market expansion.

The platform soon attracted thousands of power plants and hundreds of corporate buyers, and by year’s end it scaled annual revenue from EUR ~150K to 1M, serving Fortune 500 enterprises, a leading global asset manager ranked in the top 20, and more than 500 corporate buyers. This covers over 15 regions and links clients to 4,000 renewable energy plants via one unified, streamlined digital platform interface.

Inside the Broader Ecosystem

Importantly, Soldera is actively participating in the broader renewable energy certificate ecosystem to engage with market standards, policy directions, and future GO frameworks rather than reacting passively to them:

• Member of RECS (Renewable Energy Certificate Association): By joining RECS in 2025, Soldera participates in industry discussions and working groups focused on improving transparency, reliability, and harmonisation of energy attribute certificate (EAC) markets. This places them in active dialogue around evolving standards, including potential shifts like hourly GOs.
• Participant in the Evident I-REC(E) ecosystem: Through involvement in the international I-REC registry system, Soldera is expanding beyond EU GOs and engaging in global certificate frameworks. This strengthens interoperability and positions them within conversations about cross-border standardisation.
• Signatory of the 24/7 Carbon-Free Energy (CFE) Compact: By supporting the global 24/7 CFE initiative, Soldera aligns itself with efforts to enable hourly matching of clean energy production and consumption — a likely next step in certificate evolution.

Scaling Talent and Ambition

Looking ahead with the new funding at its belt, Soldera looks at hiring more talent.

‘We’ve accelerated AI usage and continued to hire great talent across legal, engineering, and sales. Our ongoing priority remains attracting outlier talent — as success in this market fully depends on onboarding A-players,’ Mr Bonallack tells ITKeyMedia.

‘We’re set to capture a USD 13B market on track to hit USD 80B by 2030. This fully depends on onboarding A-players and AI progress. We only hire the best and our dream is building a billion dollar company with less than 30 people,’ Mr Jerkku adds.

By providing an AI-powered platform that automates the management, trading, and verification of Guarantees of Origin (GOs), Soldera streamlines and modernizes the complex world of renewable energy certificates in Europe. This enables clean energy producers to increase revenue and corporate buyers to credibly claim renewable usage. Unifying access to dozens of national registries and integrated climate accounting frameworks reduce administrative overhead and support transparency, standardization, and cross-border interoperability in the energy certificate market. Soldera’s active participation in industry associations and global initiatives cements the company’s position at the forefront of evolving renewable energy standards, making it a key player in accelerating the transition to a carbon-free electricity system.