Short answer
In short, on the Energy Performance Certificate and solar energy in Antalya: the certificate (Enerji Kimlik Belgesi, EKB) rates a building's energy use and greenhouse gas emissions from A to G. Solar electricity generated on site can count towards the building's energy performance, depending on the calculation method. The strongest result comes from cutting demand with insulation first, then covering the rest with solar.
Key takeaways
- The EKB is the official certificate that rates a building's energy performance across heating, cooling, hot water and lighting from A to G.
- On-site renewable energy can be taken into account as a contribution to the building's energy performance, depending on the calculation method; an accredited EKB assessor determines how large the effect is.
- There are expectations for renewable energy use in new buildings; as of October 2026, scope and percentages should be checked in the current regulation.
- Antalya's cooling demand peaks in the summer months, which is also when solar production is high.
- Insulation reduces demand and solar covers what remains; planned together, they improve building performance more consistently.
When buying or renting a flat, most people look at floor area, location and the view, yet there is also an official document that describes how much energy the building will use: the Energy Performance Certificate, known in Turkey as the Enerji Kimlik Belgesi or EKB. Owners thinking about putting solar panels on the roof often ask whether that investment will show up in the EKB class. This article examines the link between the Energy Performance Certificate and solar energy in Antalya, without exaggeration and within the limits of the regulations.
One important note: energy performance regulations are updated over time. The information here describes the general framework; for a definitive answer under the current regulation as of October 2026, we recommend consulting an accredited EKB assessor and the relevant authorities.
The Energy Performance Certificate: Definition and What the Classes Show
The Energy Performance Certificate is an official document that rates a building's energy demand and the related greenhouse gas emissions. The classes run from A to G, with A the most efficient and G the least efficient. The certificate is issued by accredited EKB assessors using the national calculation method, under the building energy performance regulations administered by the Ministry of Environment, Urbanisation and Climate Change.
The calculation looks at the building envelope (the heat transmittance of walls, roof, floors and windows), heating and cooling systems, hot water preparation, lighting and ventilation. The result is expressed as the building's annual energy demand and emissions per unit of floor area, then converted into a letter class.
An EKB is not a utility bill. The actual bill varies with the occupants' habits, whereas the EKB shows how the building performs under standard conditions of use. That is why two identical flats with the same EKB class can still pay different bills.
How Do the Energy Performance Certificate and Solar Energy in Antalya Connect?
Renewable energy produced on site can be taken into account in the national calculation method as a contribution to the building's energy performance. Put simply, when the panels on the roof cover part of the energy the building draws from the grid, the calculated net demand and the related emissions go down. How much that is reflected in the EKB class, however, does not follow a fixed rule.
The main factors that determine the size of the effect are:
- Building size relative to system output: on a small detached house, a system of a few kWp can cover a significant share of total demand, whereas on a multi-storey apartment block the same roof area contributes proportionally much less.
- The building's current class: on a building with a poor envelope, solar alone delivers limited improvement; demand is high, so production covers only a small part of it.
- Calculation method and inputs: the national method in force at the time and the EKB assessor's evaluation determine which data the system enters the calculation with.
The solar resource in the region makes this contribution meaningful. According to PVGIS 5.3, the European Commission JRC solar calculator, 1 kWp of capacity in central Antalya theoretically produces 1,656 kWh a year at optimum tilt facing south. For example, the theoretical annual output of a 5 kWp system is 5 × 1,656 = 8,280 kWh; shading, soiling and the actual roof orientation will change this value. For production details, see our article on how much electricity solar panels in Antalya produce.
Antalya's Climate and Building Energy Performance
Buildings in Antalya behave differently in energy terms from those in the colder inland provinces. Along the coast, heating demand is relatively limited, while cooling demand rises sharply in summer. That works in favour of solar energy in Antalya: according to PVGIS, central Antalya produces 168 kWh per kWp in July and 167 kWh in August. The period when cooling demand rises is exactly when production peaks.
Further inland, in districts such as Elmalı and Korkuteli, winters are colder and heating demand comes to the fore. There, combining solar with a heat pump offers a way to cover part of the electric heating with on-site generation. The Solar Nexo product range also includes TommaTech Power series heat pumps; we explain this combination in our article on heat pumps and solar panels.
Renewable Energy Expectations for New Buildings
Expectations for energy efficiency and renewable energy use in new buildings in Turkey are set out in the building energy performance regulations. For new buildings meeting certain conditions, rules aimed at covering part of the energy demand from renewable sources are on the agenda.
We deliberately give no percentages, floor-area thresholds or effective dates here. Such numerical criteria can be updated, and which buildings fall within scope depends on the details. As of October 2026, the right way to find out what your project requires under the current regulation is to consult your architect, your EKB assessor and the relevant department of the municipality.
The practical advice for developers and people building a new home is this: treat the solar system as part of the design stage, not as an extra to bolt on once construction is finished. When roof orientation, pitch, cable routes and the inverter location are planned from the start, an Antalya solar panel installation is both technically cleaner and visually better integrated. Our article on the documents required for a solar installation explains what the official process asks for.
Why Plan Thermal Upgrades and Solar Energy Together?
Energy efficiency follows an established order: first reduce demand, then meet the remaining demand with efficient systems, and finally support it with on-site generation. Putting solar panels on a poorly insulated building is like filling a leaky bucket; there is production, but demand stays high.
The table below shows qualitatively which items in the EKB calculation common upgrades affect:
| Upgrade | Calculation component | Type of effect | Planning note |
|---|---|---|---|
| Facade and roof insulation | Heating and cooling demand | Reduces demand | Roof insulation should be done before the panels are mounted |
| Thermally efficient windows | Heat loss and heat gain | Reduces demand | Consider together with shading on south-facing facades |
| Heat pump | Heating, cooling, hot water | Raises system efficiency | Can be matched with solar production |
| Solar thermal collector | Hot water | Adds a renewable contribution | Roof area is shared with PV panels |
| Solar panels (PV) | Electricity demand | Provides on-site renewable generation | Roof structure and orientation assessed during the survey |
| LED lighting | Lighting | Reduces demand | Can be a low-cost first step |
When roof space is limited, the question arises whether to prioritise a solar thermal collector for hot water or PV panels for electricity. We compare the two in detail in our article solar panels or solar water heaters in Antalya.
Green Building in Antalya: The Value of an EKB When Selling or Renting
The term green building refers to buildings with high energy and water efficiency and low environmental impact. Green building has become a phrase heard more and more often in the Antalya property market; foreign buyers and long-term tenants in particular are adding energy performance to their list of questions. The EKB gives that question an official, comparable answer.
We know that an EKB can be requested in sale and rental transactions; the details of how this is applied, however, may vary with the current regulations and the type of transaction. So before a title deed transfer or a tenancy, it is worth checking whether the certificate is up to date.
Quoting an exact percentage for added value would be wrong; a property's value is determined by many factors such as location, age and market conditions. But one thing is certain: a building with a solar system on its roof, proper insulation and the paperwork to prove it sends buyers a strong message about low running costs and transparency. For a home with an Antalya solar energy system, the warranty certificates, technical documents and monitoring records handed over by your solar installer are also part of that transparency.
Solar Energy in Antalya for Apartments and Detached Houses
With a detached house, the decision rests with one owner and the roof area is usually large relative to the building's demand, so the contribution of solar to energy performance can be more pronounced. Our detailed guide for detached homes is on the page solar panels for detached houses in Antalya.
On an apartment building, the roof is a common area and the installation requires a decision by the flat owners. Shared consumption such as common-area lighting, the lift and the water booster pump can be covered by solar. Because apartment roofs offer limited space, any solar installer working on such buildings will sensibly focus the system on these shared loads.
Either way, the Solar Nexo team examines roof area, shading and consumption data during the free site survey. As an authorised dealer for TommaTech and CW Enerji, Solar Nexo uses original, invoiced products, and the manufacturer warranty certificates and technical documents are handed over to the customer. These documents also contain the technical information an EKB assessor needs to evaluate the system. When comparing Antalya solar companies, asking for this documentation up front is a sensible test.
Conclusion
The Energy Performance Certificate is your building's official energy report card, and rooftop solar can contribute to it. The size of that contribution depends on building size, existing insulation and the calculation method; the most consistent result comes from planning insulation and solar together. Request a free site survey to turn the question of the Energy Performance Certificate and solar energy in Antalya into concrete figures for your building and to size your Antalya solar panel capacity correctly. When planning your investment, sitting at the same table as your EKB assessor makes the outcome more predictable.
Frequently asked questions
What is the Energy Performance Certificate (EKB) in Turkey?
The Energy Performance Certificate (Enerji Kimlik Belgesi, EKB) is an official document that rates a building's energy demand and related greenhouse gas emissions from A to G. It is issued by accredited EKB assessors using the national calculation method under regulations administered by the Ministry of Environment, Urbanisation and Climate Change. The certificate assesses heating, cooling, hot water, lighting and ventilation.
Do solar panels improve the EKB class?
They can, but there is no fixed rule. On-site renewable energy can be taken into account in the calculation method as a contribution to the building's energy performance. The size of the effect depends on building size, system output and the building's existing insulation. On a small detached house the contribution can be noticeable, while on a multi-storey building it may be proportionally small; the EKB assessor makes the final evaluation.
Is solar energy mandatory for new buildings?
Rules on renewable energy use in new buildings are part of the building energy performance regulations, but which buildings fall within scope and the expected percentages depend on the details. To find out what your project requires under the current regulation as of October 2026, we recommend consulting your architect, your EKB assessor and the relevant department of the municipality. Planning solar at the design stage gives a cleaner result than adding it later.
Should I insulate first or install solar panels first?
The general advice is to insulate first, because insulation reduces energy demand while solar panels cover what remains. Roof insulation in particular should be completed before the panels are mounted; otherwise the panels may have to be removed and reinstalled. Planning both together improves both the EKB result and day-to-day energy costs more consistently.
Why does the EKB matter when selling or renting a property?
Because the EKB shows a building's energy performance in an official, comparable way, it gives buyers and tenants an idea of running costs. It can be requested in sale and rental transactions; since the details may change with the current regulations, check the certificate's validity before the transaction. A solar system and good insulation create a positive picture both in the certificate and in the buyer's eyes.
Why is the contribution of solar to building performance noticeable in Antalya?
Cooling demand in Antalya rises sharply in summer, which is also when solar production is high. According to PVGIS 5.3, 1 kWp in central Antalya theoretically produces 168 kWh in July and 1,656 kWh over the year. Because consumption and production coincide, it is easier to use the energy generated on site directly in the building.
Sources
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