Switching diesel minibuses for school or patient transport to quiet electric drive: Your path to zero emissions and lower operating costs.

09.02.2025

Minutes

Federico De Ponte

Experte für Beratung bei Auctoa

July 18, 2025

9

Minutes

Jan Schreiter

Profitability Expert

Noise and exhaust from diesel minibuses burden patients and schoolchildren daily. At the same time, operating costs are skyrocketing, and looming driving bans threaten the operational safety of your fleet. Discover how switching to a quiet electric drive can not only meet legal requirements but also significantly improve transport quality and optimize your balance sheet.

The topic briefly and concisely

Converting a diesel minibus to electric drive reduces operating costs by saving up to 50% on energy and maintenance.

By continuing to use the vehicle chassis and the special structure, the D2E conversion conserves resources and protects investments in terms of the circular economy.

A quiet electric drive significantly reduces noise pollution for sensitive passengers such as school children and patients, and improves air quality at bus stops.

For operators of school and patient transport services, the reliability and cost-effectiveness of their fleet is crucial. Rising diesel prices, strict emission regulations in city centers, and the high depreciation of combustion vehicles pose an increasing challenge. In addition, there is the specific requirement to create a stress-free and healthy environment for often sensitive passengers. Heero offers a pragmatic solution with the patented D2E conversion (Diesel-to-Electric) for Mercedes-Benz Sprinter. We enable you to convert your proven diesel minibus for school or patient transport to a quiet electric drive, thereby securing the investment in expensive special structures.

The dual burden of diesel: Economic pressure and health impacts

The operation of diesel minibuses in patient transport or as school buses is becoming increasingly challenging. Operating costs are rising due to volatile fuel prices and high maintenance efforts by up to 30% compared to previous years. At the same time, a diesel engine generates significant noise pollution at the low speeds typical for urban traffic below 30 km/h, which poses a source of stress especially for noise-sensitive passengers such as children and patients. This noise is particularly present in residential areas and at bus stops. Many operators underestimate that the noise emissions of a diesel in stop-and-go traffic are the main source of noise. In addition, local nitrogen oxide and fine particulate emissions lead to a direct health burden at schools and clinics. An analysis of the total cost of your fleet can accurately quantify the savings potential. These factors make the transition to a clean and quieter alternative unavoidable.

HEERO D2E Conversion: An investment in the future of your special fleet

A new purchase of electric minibuses often means the loss of expensive, custom-built modifications for wheelchairs or special seats. Our solution is the D2E conversion, where we replace the diesel powertrain of your Mercedes-Benz Sprinter with our powerful electric drive within just 10 days. This approach is a prime example of the circular economy: We preserve up to 80% of the existing vehicle and save valuable resources. You retain your trusted vehicle and the valuable modifications while upgrading technologically and ecologically to the latest standards. The value of your special modification, which often exceeds 50,000 euros, remains fully intact. Our converted HEERO E-buses are based on the reliable Sprinter platform and are optimized for the daily demands of regular or demand-responsive transport. In doing so, you not only protect your initial investment but also make it future-proof.

Redefining cost-effectiveness: Utilizing TCO advantages and incentives

The decision to opt for an electric drive is primarily a financially wise decision. A TCO analysis (Total Cost of Ownership) shows that the total operating costs of an e-transporter are significantly lower. The energy costs per 100 kilometers can drop to under 6 euros, while maintenance costs can be reduced by up to 50% due to the elimination of oil changes and wear-prone parts. Additionally, companies benefit from government incentives. Although some direct purchase premiums have expired, important financial advantages still exist. Here are the key levers for cost reduction:

  • Tax advantages: Benefit from the vehicle tax exemption for electric vehicles extended until 2035 and attractive depreciation models.

  • GHG quota: Receive annual income from the sale of CO2 certificates.

  • Lower energy costs: Electricity is significantly cheaper per kilometer compared to diesel, especially when charging at your own depot.

  • Reduced maintenance: Fewer moving parts in the electric drive train mean less service effort and lower downtime.

Learn about the current funding for the e-bus conversion to further relieve your budget. The amortization of the conversion costs can often be achieved after just 4 to 6 years.

More than just quiet: A gain in quality of life for passengers and residents

The transition of a diesel minibus to a quiet electric drive brings an often underestimated advantage: silence. For the transport of school children or patients, a noise- and vibration-free interior is a direct gain in comfort and well-being. The reduction of engine noise and vibrations significantly lowers the stress level of passengers during the ride. But even outside the vehicle, the situation improves dramatically. At stops in front of schools, hospitals, or nursing homes, the noise and exhaust pollution from running engines is completely eliminated. This directly contributes to health promotion and the achievement of your sustainability goals. The EU regulation on artificial vehicle sounds (AVAS) ensures that vehicles remain audible to other road users at speeds below 20 km/h without being perceived as disturbing. This way, safety is combined with tranquility.

Practicality without compromise: Focus on range and reliability

The concerns regarding the range of electric vehicles are central for fleet operators. Our Heero electric drives are designed for real-world everyday use requirements. With a battery capacity that enables a range of up to 425 kilometers, our retrofitted Sprinters effortlessly cover typical daily routes in school and patient transport. Charging is done overnight at the depot, ensuring the vehicles are ready for use each morning with full capacity. We rely on the proven and robust base of the Mercedes-Benz Sprinter, which guarantees high reliability and longevity. Whether as a shuttle bus for hotels or as a special vehicle for municipalities – our technology is tested. For the development of the necessary charging infrastructure, we also offer comprehensive consulting and solutions, which can be supported by programs like the charging infrastructure funding.

Conclusion: Your advantage with HEERO – Economical, sustainable, and future-proof

The decision to convert a diesel minibus for school or patient transport to a quiet electric drive is a strategic decision for the future. You detach from rising operating costs and uncertain diesel regulations. You invest in the health and well-being of your passengers and make an active contribution to environmental protection in your community. With the HEERO D2E conversion, you combine ecological responsibility with economic prudence while protecting your existing vehicle assets. As an innovative partner, we accompany you from analysis to conversion to the planning of the charging infrastructure. Take the decisive step and secure the future viability of your fleet. Request your personal consultation now or book a trial for free to experience the benefits firsthand.

FAQ

How long does the conversion of my diesel minibus take?

The D2E conversion of your vehicle at our factory usually takes only about 10 working days. This way, we ensure minimal downtime for your fleet.



Are there government subsidies for the conversion?

Yes, although subsidy programs change, there are still financial incentives. These include tax benefits such as exemption from vehicle tax, attractive depreciation rules for companies, and income from the THG quota. We are happy to advise you on the current options.



Is an electric drive strong enough for a fully-loaded minibus?

Absolutely. Our electric drives are designed to provide excellent performance and acceleration even when fully loaded. The high torque of the electric motor ensures confident and pleasant driving, especially in urban traffic.



What does circular economy mean in the context of vehicle conversion?

Circular economy means using existing resources for as long as possible. Instead of scrapping an entire vehicle, the conversion preserves most of the vehicle, particularly the resource-intensive structure. This reduces waste, saves energy, and lowers the demand for primary raw materials.



Does Heero also offer solutions for charging infrastructure?

Yes, we offer a holistic solution. Our service includes consulting, planning, and installation of the appropriate charging infrastructure for your operational site, ensuring smooth and efficient charging operations for your E-fleet.



Can I test a converted van in advance?

Yes, we are confident in our technology. Therefore, we offer potential customers the opportunity to experience our converted vehicles live in a free everyday test and to be convinced of their performance and practicality.