The Energy Fit plan is a two-year energy tariff available to online dual fuel customers who pay by fixed direct debit and gives users two months of free energy, the Guardian stated.
However, the news provider observed the small print reveals those who opt for this billing scheme will not get the standard eight per cent discount for paying by direct debit, though E.ON stated they "will receive the equivalent of 8.33 per cent off their annual charges in the free months."
It was noted that E.ON is not the only major gas and electricity provider to offer this type of deal and these overly complex tariffs could put some people off trying to make energy savings by switching their supplier.
The gas and electricity tariff offers free energy monitor and energy efficiency service to try to help customers cut their energy bills.
Performing an energy comparison to find a better deal may be a worthwhile activity for many people, as last week the final tariff that offered average annual bills of under £1,000 was withdrawn from the market by Scottish Power.