Typically applied to LGV's having the ability to operate on both petrol and an alternative fuel such as Compressed Natural Gas or Liquified Petroleum Gas.

When a Cogeneration unit is enable to operate on two fuels

An energy use for which there is an alternative fuel.

System that allows a vehicle to operate on two fuel, such as petrol and LPG.

See Two Fuel.

Dual Fuel plans are offered by some suppliers to those customers who choose to have both their gas and electricity supplied by the same supplier. These plans typically include incentives, discounts, or reduced prices. Such plans are also referred to as 'Combined' plans.