Frequently Asked Questions

Solar power plants do not produce harmful carbon dioxide emissions, thus contributing to the fight against climate change. In addition to their environmental friendliness, solar power plants generate their own electricity and increase your energy independence. An additional advantage of solar power plants is a significant reduction in your electricity bills. Depending on your consumption habits and the size of the solar power plant, you can achieve savings of up to 80%.

On the website of the Environmental Protection and Energy Efficiency Fund (FZOEU), you can find detailed instructions on tenders and public calls aimed at providing financial support for the transition to renewable energy sources. When applying for public tenders, it is important to submit all the necessary documentation on time and regularly monitor the progress of the tender. For additional information, you can contact our call center or reach us via email, and our knowledgeable staff will guide you through the tender process.

The price of a power plant depends on the type and capacity of the existing connection, the type and surface area of the roof or the area where the power plant is installed, and the current and planned future electricity consumption. Based on your needs, we determine the optimal power of the power plant, which is why we approach each client, whether it's a household or a business, individually. After inspecting the facility and consulting with our advisors, taking into account your additional requirements, we are able to offer you the final price of the power plant.

All the solar systems we offer have the capability of monitoring the operation of the power plant. Monitoring is done through a mobile or computer application. You can see the amount of electricity generated in real-time and manage the operation of your power plant from anywhere you are. As an additional option, we offer hardware for monitoring your overall consumption, known as a meter. The advantage of the meter is the ability to see the production-to-consumption ratio and the possibility to limit the operation of the power plant to achieve the most favorable ratio.

Since we only use equipment from reliable manufacturers, we confidently pass on the manufacturer's warranty for panels and inverters to our customers, which can last up to 25 years. In accordance with the Construction Law, the warranty for our work lasts for 2 years, and for households, we also provide an insurance policy in the first year in case of natural disasters such as hail, lightning, or fire.

The profitability of a solar power plant primarily depends on:

• the total electricity consumption, which determines the designed capacity of the power plant. As the capacity of the power plant increases, the profitability also increases.
• geographical location, for example, in Dalmatia, the insolation is over 20% higher than in the continental part of Croatia.
• with panel orientation and tilt, the difference in productivity between the north and south can exceed 30%. The ideal tilt is approximately 30 degrees.
• the quality of the installed equipment - for example, optimized systems like SolarEdge or microinverter systems like Enphase - can have up to 15% higher efficiency compared to conventional string inverters.

Based on all the aforementioned factors, a power plant with an average capacity of 6.5 kW has a payback period of 6 to 8 years, depending on the factors mentioned earlier. Of course, a key factor is the price of electricity in the coming years.

On the HEP website, the procedure for the new billing calculation after installing a solar power plant is explained in detail. It is important to differentiate between two models, one for households and one for businesses. The billing model for households is more favorable if they consume more electricity from the grid throughout the calendar year than they supply back to the grid. However, if a household supplies more electricity to the grid than it consumes from the grid, it will be subject to the billing model for businesses.

We offer the possibility of installing power plants on various types of surfaces such as roofs, parking lots, and land areas. We have developed substructures for all types of roofs and rooftops. We install power plants on flat and sloping roofs, as well as roofs covered with metal, tiles, or other roofing materials.