Side by side
Technology comparison
Ratings are relative and directional. Real numbers depend on your equipment, feedstock, scale and climate — this table is for narrowing the field, not for engineering.
Waste → methane
Biogas
- Feedstock
- Organic waste, manure
- Vehicle compatibility
- CNG vehicles after upgrading
- Complexity
- Medium
- Typical scale
- Farm – Industrial
- Storage difficulty
- High
- Energy efficiency
- Medium
- Startup cost
- Medium–High
- Ongoing cost
- Low
- Carbon potential
- Strong — diverts waste emissions
- Best for
- Farms and food-waste operations
Oil → diesel-compatible fuel
Biodiesel
- Feedstock
- Waste oil, oil crops
- Vehicle compatibility
- Diesel engines (blend limits apply)
- Complexity
- Medium–High
- Typical scale
- Home – Industrial
- Storage difficulty
- Low
- Energy efficiency
- High
- Startup cost
- Medium
- Ongoing cost
- Medium
- Carbon potential
- Good with waste feedstock
- Best for
- Diesel equipment and waste-oil access
Sugar → alcohol fuel
Ethanol
- Feedstock
- Sugar and starch crops
- Vehicle compatibility
- Flex-fuel and blended gasoline
- Complexity
- Medium–High
- Typical scale
- Farm – Industrial
- Storage difficulty
- Medium
- Energy efficiency
- Medium
- Startup cost
- Medium–High
- Ongoing cost
- Medium
- Carbon potential
- Varies widely by feedstock
- Best for
- Crop growers with surplus sugar or starch
Biomass → combustible gas
Wood Gas
- Feedstock
- Wood and dry biomass
- Vehicle compatibility
- Stationary engines; road use impractical
- Complexity
- High
- Typical scale
- Farm – Commercial
- Storage difficulty
- Very High
- Energy efficiency
- Low
- Startup cost
- Medium–High
- Ongoing cost
- Medium
- Carbon potential
- Good if biomass is sustainably sourced
- Best for
- Stationary power with abundant wood
Electricity + water → hydrogen
Hydrogen
- Feedstock
- Water and electricity
- Vehicle compatibility
- Fuel-cell vehicles
- Complexity
- Very High
- Typical scale
- Commercial – Industrial
- Storage difficulty
- Very High
- Energy efficiency
- Low
- Startup cost
- Very High
- Ongoing cost
- High
- Carbon potential
- Excellent with renewable power
- Best for
- Industrial and long-duration storage
Renewable energy + carbon → liquid fuel
E-Fuels
- Feedstock
- Hydrogen + captured CO₂
- Vehicle compatibility
- Any existing engine (drop-in)
- Complexity
- Industrial
- Typical scale
- Industrial
- Storage difficulty
- Low
- Energy efficiency
- Low
- Startup cost
- Very High
- Ongoing cost
- High
- Carbon potential
- Excellent if fully renewable
- Best for
- Aviation and hard-to-electrify fleets
Renewable power → EV energy
Electricity
- Feedstock
- Sun, wind, water
- Vehicle compatibility
- EVs and electric equipment
- Complexity
- Low–Medium
- Typical scale
- Home – Industrial
- Storage difficulty
- Medium
- Energy efficiency
- Very High
- Startup cost
- Medium
- Ongoing cost
- Low
- Carbon potential
- Excellent with renewable generation
- Best for
- Almost anyone with an EV
Ratings are relative, not measured values. Real performance depends strongly on equipment, feedstock quality and scale, so exact figures would be misleading.
Conversion pathways
The number of conversion steps is usually a better predictor of difficulty than any single rating.
Manure to road
- Cow manure
- Digester
- Biogas
- Gas cleanup
- Biomethane
- Vehicle
Waste oil to road
- Used cooking oil
- Preparation
- Biodiesel processing
- Quality testing
- Diesel vehicle
Sunlight to road
- Sunlight
- Solar panel
- Electricity
- Battery
- EV
Corn to road
- Corn
- Fermentable sugar
- Ethanol
- Fuel blend
- Flex-fuel vehicle
Wood to power
- Wood
- Gasifier
- Producer gas
- Filtration
- Engine