Up to 80% of total energy consumption in the EU is attributed to urban areas, mostly with historical urban centres. At the same time, low carbon energy supplies in the style of energy storages, especially in historical urban centres, is a rarity in central Europe. This is mainly because of strict architectural protection constraints, higher implementation costs and often also conflicts with town planning policies.

The STORE4HUC project aims to improve territorially based low-carbon energy planning strategies. It will enrich policies that support climate change mitigation in historical city centres by focusing on improved urban and spatial planning for integrating energy storage systems to enhance the public institutional and utility capabilities. 

The partners will develop policy recommendations and identify suitable integrated technological solutions to overcome low carbon development barriers in historic centres. They will also facilitate the development of open energy and load management systems for energy efficiency and use of renewables. With its concepts and pilot systems, STORE4HUC will provide smart city test beds, where technicalities will be reconciled with historical and architectural values. 

Who are you?

Are you a house owner ready to lower your energy demand?  

 Our Autarky Rate Tool  might be the place to start exploring what STORE4HUC offers!

Are you an energy expert or similar?

Then consider to read about our Optimal Sizing Calculator  first!

And if you are a specialist for heating, scroll passed those tools to the Optimal Heat Source Scheduler

Autarky Rate Tool

Autarky Rate Tool infographic

Measuring the degree of self-sufficiency with just a few clicks and evaluating the technical, economic and ecological effects of your system configuration – this is now provided by the Autarky Rate Tool!

This easy to use tool is suitable for all those who are interested in installing electric storage systems in combination with renewable energy sources!

After entering all necessary data, the tool will create a checklist, which summarises the results in a pdf document. It also contains an analysis of the calculation results as well as specific information for storages in historic towns.

You can test and use the Autarky Rate Tool by clicking here. It is available in English, Slovenian, Croatian, Italian and German.

If you have problems with the tool, feel free to contact us under:


For further background information how the Autarky Rate Tool's insides work click here!

#Watch a short explanation video about the tool here!

Optimal Sizing Calculator


To maximize the contributions while minimizing the price of the installations, the Optimal Sizing Calculator computes the optimal sizes of a Photovoltaic (PV) and a battery energy storage system (BESS) for a site. 

Those sizes are peak power of the PV system, energy capacity of the BESS, and power converter rated power of the BESS. The calculator uses typical yearly consumption profiles of a variety of consumers, but if you have your own consumption profile recorded you can use it to calculate your optimal parameters more accurately.

Please follow the instructions in the README text document and the User Manual in the zip folder carefully before working with the calculator.

You can download the calculator by clicking here! (100 MB) - English

German Version

Italian Version

Slovenian Version

Croatian Version

If you have problems with the tool, feel free to contact us under:

filip.rukavina@fer.hr or mario.vasak@fer.hr

#1 Watch this tutorial to get the Optimal Sizing Calculator running!

#2 Here you can watch an in-depth look at the parameters used in the tool!

platzhalter heat source

The Optimal Heat Source Scheduler

Installing a thermal storage to a heating system introduces flexibility which provides the possibility to control heat source(s) more efficiently. To ensure the maximal efficiency, the Optimal Heat Source Scheduler provides the user with an optimal schedule for the selected heat source(s) for a 24 hours period.
The tool includes powers of the respective heat source as well as the times when the heat source is on or off in the calculations. Furthermore, it uses the estimated heating power demand to create an optimal schedule, keeping the heating medium at the respective required temperatures.

Please follow the instructions in the README text document and the User Manual in the zip folder carefully before using the tool.

If you have problems with the tool, feel free to contact us under:
filip.rukavina@fer.hr and mario.vasak@fer.hr

Click here to get to the download link!

Social Media


our Fifth Newsletter:

screenshot newsletter

  • Construction work at the sloping elevator in Italy has finished
  • Video journey about the construction in Cuneo, Italy
  • The Lendava pilot project in Slovenia is done, too!
  • Our second thematic leaflet, with all the information about the project is ready for download

target groups


local public


Regional public


sectoral agency


infrastructure and
public service


Interest groups/


higher education
and research


Business support


Project Structure

Project Duration

Start Date

April 2019

End Date

March 2022

Documents and publications

As the STORE4HUC proceeds, you will find valuable resources in the section in various format.