- Biodiesel is produced from a highly efficient and low-energy process called transesterification.
- This means biodiesel producers can create a significant amount of renewable energy in relationship to the traditional heating fuel they put in to create Bioheat® fuel.
- This ratio, commonly known as an energy balance or return on energy invested, exceeds 4.5:1.
As producers increasingly incorporate more renewable energy and find ways to reduce overall energy usage in their already highly efficient process, this number has grown. While biodiesel producers are increasing their energy balance, petroleum is becoming more difficult to extract, relying on tar sands and fracking. This has caused the energy balance of petroleum to decline from 100:1 in the early 20th century to as low as 4:1.