The Explorer is a one-of-a-kind search engine that showcases profitable climate solutions from all over the world which are part of an ever-growing, curated, and publicly-accessible database. Select your profile, your needs and climate goals to discover the solutions that fit best with your situation.

Explore Learn more

Cancel Confirm

My Search Alerts

The Solutions Explorer lets you create alerts that match your needs. You can create several alerts and you will receive a notification each time a new Solar Impulse Efficient Solutions is labeled and matches your filters.

Your Search Alerts will show up here.

Sign in to create alerts for your filters and search terms.

Sign in

Don't have an account?

Sign up

My Favorites

The Solutions Explorer lets you shortlist your favorite solutions.

Your favorites will show up here.

Sign in to add a solution to your favorites.

Sign in

Don't have an account?

Sign up

Contact the Solution's Provider

You can contact each Solution’s Provider through the « Solutions Explorer » contact form. The team will also follow up to make sure you’ll have an answer to your request.

Your contact form will show up here.

Sign in to contact the Solution's Provider

Sign in

Don't have an account?

Sign up

My Account

Sign in

Don't have an account?

Sign up

CMF Drive

Upcycling of old diesel buses into clean, efficient buses powered 100% by renewables

April 2021
  • /

CMF Drive by CM Fluids implemented by Munich Airport in Munich (Germany) in 2021

800 t of co2 per vehicle, +12 years bus lifetime expansion & -95% particulate matter emissions

CMF Drive

Upcycling of old diesel buses into clean, efficient buses powered 100% by renewables

  • World Alliance Member
  • Featured Solution
  • Labelled Solution
Label Date April 12, 2021
From Germany
Maturity stage TRL 7 - Prototype testing in the real world
Looking for funding on RUNWAY View financial profile

Climate change is leading to various problems for society and nature. Air pollution from motorized mobility in cities harms the health of the inhabitants and jobs in the automotive industry are shifting to Asia. These are some of the reasons which led to the development of the Clean Vehicle Directive (DIRECTIVE (EU) 2019/1161). According to this directive, municipalities are forced to reach procurement targets of clean and energy-efficient vehicles. This is a huge challenge for municipalities, as existing alternatives to diesel buses are not always suitable or are extremely expensive. In order to meet the needs of these municipalities, CMF recovers their old buses and remove all diesel components like tanks, engine etc. and install the patented CMF drive. It consists of an electric drivetrain with an onboard charger and enables 3-fold energy savings: Through the recovery of braking energy, usage of engine waste heat and constant optimal load at the on-board charger. Thanks to upcycling, CMF avoids the production of unnecessary material. The CMF drive runs on liquid natural gas (LNG), Bio-LNG or synthetic natural gas. Suitable fuel stations already exist all over Europe and as soon as green hydrogen is available in sufficient amounts the CMF will easily be adapted to it.

The Environmental Benefits

  • 30 % more energy efficient than conventional buses thanks to the patented CMF drive
  • 5 minutes refueling 500 kilometers driving thanks to the on-board charger
  • 50 % less engine noise
  • 100 % less CO₂ emissions with Bio-LNG
  • 95 % less air pollution
  • 90 tons of CO2 emissions per bus avoided through upcycling of used buses instead of producing new ones

The Financial Benefits

  • €200,000 to €400,000 cheaper acquisition costs than battery electric or hydrogen buses
  • €120,000 to €190,000 fuel cost savings over a lifetime of 12 years for one bus compared to battery electric, hydrogen, CNG or diesel bus
  • No charging infrastructure needed

Target client profile


Activity Region

  • Headquarters
  • Activity

Company Profile

CM Fluids

Wir dekarbonisieren den städtischen Verkehr durch die Nachrüstung von Dieselbussen mit unserem innovativen CMF-Antrieb, der mit CMF-Biomethan betrieben wird.

Headquarters 85296 Rohrbach, Deutschland
Type Startup or self-employed
View company profile Solution website

Networking Partner

EIB Institute

The EIB Institute was set up within the EIB Group (European Investment Bank and European Investment Fund) to promote and support social, cultural, and academic initiatives with European stakeholders and the public at large. It is a key pillar of the EIB Group’s community and citizenship engagement.

Solutions Associated 22
View partner profile


Contact the Solution Provider Add to Favorites

The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator CM Fluids has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.