Energy Supply Contract (ESC) is a business model with which measures for renovating heating and cooling systems in buildings and the construction of district heating systems (e.g. systems for wood biomass and other renewable sources) are financed by the contractor. The contractor is paid from the services of energy supply in the contractual period. If certain conditions are met, the use of the principle in the public sector is not considered as public contracting authority borrowing.

The renovation or construction measures are performed by the contractor at their own expense. The invested funds are returned with a fixed price or charged power that the contracting authorities or users pay for the supplied heating energy or cooling (image 2). In the preparation stage, the contractor plans and implements the investment measures. This is followed by the main stage of the contractual relationship that encompasses refinancing of the investment input through management and supply of energy, the price of which is lower than the price that the contracting authority would be paying before the renovation. The usual duration of the contracting period is between 5 and 15 years.

The business model is used for performing renovations of energy systems in buildings, for performing transitions to other energy sources, installation of devices for co-production of electric power, heating and cooling – STPE, etc.


Picture: The principle of supply contract

Contact us for additional information


You can contact us if you have any questions.


Petrol d.d.
Pot na Lisice 7, 4260 Bled, Slovenia
T +386 4 575 30 00
F +386 4 575 30 01
Contact us >>>

Support and Service

Customer Service:
T +386 4 575 30 15 (7h-15h)
M +386 51 303 245

Management >>>
Service >>>
This website uses cookies. Some cookies ensure that the website is correctly displayed, while others can be used to make your browsing experience easier. Cookies also allow us to keep track of the number of visitors our website has had, and ensure proper operation of plugins which enable content sharing.
If you continue to browse our website, it will be considered that you are accepting any cookies that might be used.
Decline cookies