Solar Panel Production Antalya: kWh per 1 kW a Year (PVGIS)

The most reliable reference for solar panel production in Antalya is the European Commission's PVGIS tool: according to PVGIS 5.3, a 1 kW (1 kWp) panel in central Antalya at optimal tilt and south orientation produces about 1,656 kWh of electricity per year. In this article we explain the monthly values, the district comparison and why this figure may come out a little differently on your own roof. That way you can approach the question "how many kW of panels should I install?" with a solid calculation.

How many kWh does 1 kW of solar panels produce per year in Antalya?

Solar panel output is expressed as "specific production": annual kWh per installed kWp. PVGIS calculates this value from the region's long-term irradiation data, assuming 14 percent system losses (cables, inverter, temperature, soiling and so on), optimal tilt and south orientation. For central Antalya the result is 1,656 kWh/kWp, and the optimal tilt is 33°.

It is worth noting the difference between kW and kWp here. kWp is the peak power of the panels under standard test conditions; inverter power (kW) is the alternating-current power the system can deliver to the grid. These two values do not have to be the same. The PVGIS calculation is made on kWp, the panel power; so make sure that the "installed power" in a quote refers to panel power.

The formula is simple: Annual production (kWh) = installed power (kWp) × specific production (kWh/kWp). For example, 5 × 1,656 = 8,280 kWh for 5 kWp and 16,560 kWh for 10 kWp of theoretical annual production. If a panel is 605 W, 1 kWp is about 1.65 panels; that is, a 5 kWp system means about 8-9 panels of 605 W (calculation).

Monthly solar panel production table for Antalya

In Antalya, production varies markedly with the seasons. The table below shows the PVGIS monthly values and what they mean for a 5 kWp system. The monthly values add up to 8,275 kWh; the difference from the annual 8,280 kWh is due to rounding.

Two conclusions follow from the table. First, July production is about 1.7 times December production (168 / 99). Second, June, July and August together provide about 30 percent of annual production, while December, January and February provide about 18.5 percent (calculation). Because summer is when air-conditioning, pool and tourism loads rise in Antalya, a summer-weighted production profile is an advantage for most businesses and villas. Spring and autumn give moderate output: April 150, May 157, September 155, October 137 kWh/kWp. That is, about 73 percent of annual production occurs in the eight months from March to October (calculation). To see winter production in detail, you can read the article on solar panel performance in the winter months.

District comparison: from Alanya to Elmalı

Because Antalya is varied in climate and altitude, there are differences between districts too. PVGIS 5.3 gives the following results under the same assumptions (14 percent losses, optimal tilt, south):

The 104 kWh/kWp difference between Elmalı and Alanya is about 6.4 percent of the Alanya value; between central Antalya and Alanya the difference is about 2.5 percent (calculation). So regional differences exist, but results across Antalya are close to each other. Because the air is cooler in Elmalı, which is at a higher altitude, panel temperature losses are lower; this is one possible reason for that district's high value, but the PVGIS output alone does not prove it. Villa roofs in Kaş and Kalkan, agricultural irrigation pumps in Korkuteli and Elmalı, and hotel and villa loads in Manavgat and Side shape district-level design. Because the values are so close, roof quality and consumption profile are often more decisive than the choice of district. For details specific to Alanya, you can read the Alanya solar panels article.

Why can solar panel efficiency in Antalya differ from PVGIS?

The PVGIS value is a reference for ideal conditions. In a real system, the following factors change the result:

• Roof orientation and tilt: The pitch of tiled roofs is often in the 20-35° range; if the orientation departs from south, production falls. On a flat terrace there is flexibility to choose the tilt. For details, see our article on angle and orientation.
• Shading: A neighbouring building, tree, water tank or chimney can limit the production of all the panels on a string.
• Temperature: In Antalya, where the average July maximum temperature is 34.2 °C, panel cells run much hotter. In an example calculated with the NOCT approach (ambient 34 °C, irradiance 1000 W/m², NOCT 45 °C), cell temperature comes to about 65 °C. For a TOPCon panel with a Pmax coefficient of −0.30 %/°C this means about 12 percent power loss relative to STC; for a PERC panel with a coefficient of −0.34 %/°C it is about 13.6 percent. This is a calculation, not a measurement, and it is already partly included in PVGIS's temperature losses.
• Soiling: Because most of Antalya's rainfall comes between November and February, dust and pollen accumulate in the summer months.
• Equipment quality and ageing: Panel power loss increases over the years; for example, the 605 W TommaTech datasheet foresees 99 percent performance in the first year and 87.4 percent in year 30.
• Outages and curtailment: Inverter faults or grid outages can stop production for that period.

There are also things you can do to protect production: leaving a ventilation gap behind the panels, cleaning the surface at the end of summer, monitoring inverter data, and pruning or moving obstacles that cast shade. These simple measures make up for most of the losses.

Some of these factors are included in PVGIS's general 14 percent loss; however, shading, orientation deviation and soiling are specific to the roof. A sound approach is to treat the PVGIS value as an upper limit and make a separate loss calculation for your roof. For all the items that affect efficiency, the article on efficiency factors is useful.

From a production calculation to a capacity calculation

You can invert the production values to find the capacity for your needs: Required installed power (kWp) = annual consumption (kWh) / 1,656. For example, for a home that uses 6,000 kWh a year, 6,000 / 1,656 ≈ 3.6 kWp, that is, 6 panels of 605 W (3.63 kWp) come theoretically close to annual consumption (calculation). In real life, however, production and consumption do not occur at the same hour; so the self-consumption rate, net metering rules and roof area must also be taken into account. To see the calculation method step by step, take a look at our article on how many kW of solar panels you need.

A note on regulation as well: as of October 2026, netting for facilities tied to a residential subscription is monthly; for non-residential facilities it is hourly from 1 May 2026. The payment for surplus energy is determined on the basis of the single-rate active energy unit price, not the total unit price on the bill. So instead of looking only at annual kWh, you also need to anticipate how much of the production you will consume yourself. The current rules may change over time.

Conclusion

Solar panel production in Antalya, according to PVGIS, is about 1,656 kWh per kWp per year; regional differences do not exceed a few percent, while seasonal differences are marked. Take the figure as an upper limit and add your roof's orientation, shading and your consumption profile. If you would like a result for your own roof, you can use our calculator page or contact us for a site survey.

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