Retrofitting to electric buses in 2025: Meeting legal quotas with superior TCO – a look back at subsidies
Retrofitting to electric buses in 2025: Meeting legal quotas with superior TCO – a look back at subsidies
The electrification of your bus fleet remains a key topic. With the Clean Vehicles Directive, the requirements became stricter; the federal funding call for buses ended on July 21, 2026, and covered up to 70% of the additional costs, retrofits explicitly included. Discover how you can meet the legal requirements and significantly reduce your Total Cost of Ownership (TCO) by converting to an electric bus.
The topic briefly and concisely
By the end of 2025, according to the Clean Vehicles Directive, 45% of newly procured buses must be clean, making retrofitting a strategic necessity.
The federal program funded the conversion to electric buses with up to 70% of the additional costs; applications had to be submitted by July 21, 2026, and a subsequent call has not been announced.
The D2E conversion preserves investments in specialized structures and often offers a better Total Cost of Ownership (TCO) than a new purchase due to lower operating costs.
For operators of bus fleets in the public sector and private industry, 2025 is a decisive year. Rising operating costs, impending diesel driving bans, and the binding quotas of the Clean Vehicles Directive are creating massive pressure to act. Many decision-makers face a choice: expensive new purchase or strategic conversion? With its patented conversion for Mercedes-Benz Sprinters and other commercial vehicles, HEERO offers you a technologically leading and economically pragmatic solution. This ensures that the future of your fleet remains plannable and your investments in expensive custom bodies are protected. In the bus program, the government subsidy rate was recently up to 70 percent of the additional costs, otherwise 55 percent.
The regulatory framework 2025: Why action is needed now
The EU Clean Vehicles Directive, implemented in Germany by the Clean Vehicles Procurement Act (SaubFahrzeugBeschG), sets clear deadlines. By the end of 2025, public contracting authorities must meet a quota of 45% for clean buses in procurement. Half of this quota, i.e., 22.5% of new procurements, must even be completely emission-free. For many municipalities and logistics companies, this represents an immense challenge within the next 18 months. This requirement is not a distant goal, but an immediate requirement. The BMDV guidelines establish the legal framework for this. Non-compliance can not only have legal consequences, but also result in exclusion from future public contracts. The strategic transition of your fleet is therefore no longer an option, but a necessity that requires well-thought-out action.
Maximizing cost-effectiveness: Retrofitting is better than buying new in terms of total costs.
The purchase of a new electric bus often costs two to three times as much as a comparable diesel model. Retrofitting is a far more capital-efficient alternative here. It not only protects your budget, but above all your existing investments in expensive and proven special bodies. The Total Cost of Ownership (TCO) prove this advantage. While the initial investment is lower, you also benefit from lower energy, maintenance, and operating costs. A key aspect is the circular economy: instead of scrapping a fully functional vehicle, its lifecycle is extended by at least 10 years. This reduces resource consumption and the CO2 emissions that would be generated during the production of a new vehicle. Learn more about how you can efficiently electrify your bus fleet. Retrofitting is therefore not only an emission-related but, above all, an economically smart decision for every fleet manager.
Funding call in review: Up to 70% of additional costs covered
The Federal Government has recognized the enormous financial hurdle involved in fleet conversion and has reacted. With the funding calls under the "Directive on the Promotion of Alternative Drives for Buses in Passenger Transport", electrification was massively supported. Transport companies and other users were able to submit project outlines in the call from May 26 to July 21, 2026. The program subsidized both the purchase of new vehicles and the retrofit of conventional buses to electric drive. The funding rate was decisive: it covered up to 70% of the additional investment expenditure at a low level of electrification, otherwise 55%. Around 500 million euros were available in total in this call.
An overview of the most important points:
Subject of funding: Retrofitting to battery or fuel cell drive as well as the necessary charging infrastructure.
Funding amount: Up to 70% of the additional costs for the vehicle at a low level of electrification, otherwise 55%, and up to 40% for the infrastructure.
Application deadline: The call ran from May 26 to July 21, 2026, and has expired.
Evaluation: The award was made competitively, based on criteria such as CO₂ avoidance and electrification rate.
This funding made the E-Bus Umrüstung und Förderung 2025 a strategic topic. A follow-up call has not been announced; the funds were allocated according to a prioritization process.
The HEERO conversion process: Efficiency and performance in 10 days
Our patented conversion is the result of German engineering and is designed for maximum efficiency and durability. We transform your proven Mercedes-Benz Sprinter or another van into a powerful electric commercial vehicle within just 10 working days. In the process, the valuable special body is fully preserved. The core of the vehicle is modernized, not replaced. The process is clearly structured and transparent. Here are the essential steps:
Vehicle Inspection: Detailed examination of the base vehicle and the body.
Dismantling: Professional removal of the diesel engine, transmission, and exhaust system.
Installation of Electric Components: Integration of our highly efficient electric drivetrain and battery systems.
System Integration: Connection to the existing onboard electronics and installation of the new vehicle control unit.
Quality Assurance: Comprehensive testing of all systems, including performance and range verification.
TÜV Approval: Official approval and re-registration as a fully-fledged electric vehicle.
With a range of up to 425 km and a performance that is in no way inferior to the original, your converted vehicle is ready for all everyday challenges. The right charging infrastructure is a crucial factor in this, which we also cover in our consultation.
CO2 savings and sustainability: Measurable benefits for the environment and image
Converting to electric drive is a direct contribution to climate protection. Every single electrified bus avoids a significant amount of greenhouse gases over its lifetime. All 3,500 e-buses funded in Germany to date will save around 2.85 million metric tons of CO2. For your company or municipality, this means an immediate and measurable improvement in the carbon footprint. This saving is a strong argument in sustainability reports and in public communication. Crafts businesses, logistics companies, and municipal service providers thus strengthen their position as responsible and forward-looking partners. The CO2 savings through e-bus funding is a central lever to achieve environmental goals while positively charging one's own brand image. Deciding to convert is a clear commitment to the circular economy and resource conservation.
Conclusion: Your advantage with HEERO
The conversion to an electric bus remains the strategically smartest decision for fleet operators. You not only solve the challenges posed by legal quotas and rising costs, but also convert them into a competitive advantage. With the HEERO D2E conversion, you combine maximum economic efficiency through a superior TCO, lived sustainability through a circular economy, and secured performance through proven vehicle technology. The latest funding call for buses ended on July 21, 2026; the previously communicated 80 percent funding rate for e-buses was recently no longer valid. Nevertheless, position your fleet to be future-proof. HEERO is your innovative partner, accompanying you from analysis through conversion to charging infrastructure. Take the decisive step now. Experience HEERO live: Book your everyday test at zero cost or request a personal consultation.
More useful links
Bundesministerium für Digitales und Verkehr provides comprehensive information on current funding programs in the field of electromobility and sustainable transport development, such as e-bus funding.
Via the easy-Online portal, project outlines and applications for various federal funding programs, including e-bus funding, can be submitted digitally.
The Fraunhofer-Institut für Verkehrs- und Infrastruktursysteme IVI conducts research into innovative solutions for electromobility and sustainable transport concepts that are relevant for the electrification of fleets.
