Frequently Asked Questions

A solar power plant converts sunlight directly into electricity via photovoltaic (PV) panels. Panels generate direct current (DC); an inverter converts this into the alternating current (AC) used by your facility and the grid. The energy is first used for your own consumption, and any surplus is fed to the grid according to net-metering rules. A PV plant consists of modules, mounting structures, inverter(s), AC/DC panels, metering and protection equipment.

A rooftop PV system is installed on an existing building roof (home, factory, commercial facility); it requires no extra land, targets self-consumption and usually pays back faster. A ground-mount plant is built on open land, typically at larger scale, and generally requires land allocation, a soil survey and a substation for grid connection. Which one suits you is determined by feasibility, based on your consumption profile, roof load capacity/land status and investment size.

EPC (Engineering–Procurement–Construction) means the engineering, equipment procurement and on-site installation are carried out under a single contract by one responsible firm. In this model the investor avoids the burden of supplier coordination, technical risk and warranty tracking, works with a single point of contact, and gains fixed delivery time and budget predictability. Ventira handles the entire process from feasibility to commissioning under EPC.

Installation is possible at every scale — from a few kWp on a home roof, to hundreds of kWp / several MWp on industrial roofs, to multi-megawatt ground-mount plants. Ventira serves residential (5–50 kWp), commercial & industrial (50 kWp–5 MWp) and utility-scale (1 MWp+) projects. The right scale is determined by your roof/land area, contracted connection power and annual consumption.

The payback period depends on the site's solar yield, self-consumption ratio, electricity purchase tariff and system cost. In a facility with a high self-consumption ratio (high daytime consumption), the return is noticeably shorter than in one with low self-consumption. The exact period is determined by a feasibility study prepared for your consumption profile, calculating NPV, IRR, LCOE and payback time. The plant's economic life exceeds 25 years.

Cost depends on items such as installed capacity (kWp), roof/land type and structure, panel and inverter selection, mounting structure, cabling and electrical infrastructure, and grid connection (a transformer if required). For this reason, a project-specific quote prepared after a site survey is essential rather than a single "per square metre" or "per kW" price. Because Ventira works independently of any brand or supplier, it recommends only the most suitable technical solution for your project — targeting the best cost-performance, not merely the cheapest.

Supports such as VAT exemption and customs duty exemption under an investment incentive certificate, along with periodically opened SME / green transformation support programmes, may apply. Since the scope and conditions of these supports change over time, it is best to evaluate the current situation together. Correct technical documentation and feasibility are required to benefit from these supports; Ventira also prepares the technical documents needed for the incentive application.

Yes. Under the unlicensed generation regulation, generation exceeding your instantaneous consumption is fed to the grid and assessed according to net-metering/sale rules. However, sale limits and pricing changed with the hourly netting regulation that took effect in 2026: the generation eligible for paid sale is limited to twice the previous year's consumption, and generation exceeding this limit is transferred to YEKDEM free of charge. To calculate the return correctly, your consumption and pricing profile must be analysed.

A typical approval flow in the unlicensed PV process is as follows: (1) A connection application is made to the relevant distribution company (EDAŞ/TEDAŞ) and, if approved, a call letter (çağrı mektubu) is issued. (2) The electrical project and the structural (load-bearing) project for the roof/mounting are prepared and approved. (3) A suitability letter is obtained from the authority empowered for zoning/building permits (e.g. the municipality). (4) The connection agreement is signed with the relevant EDAŞ/TEDAŞ. (5) Installation (mounting and electrical works) is completed. (6) Acceptance procedures are carried out and the system is energised. Our team, holding TMMOB Chamber of Electrical Engineers signature authority, manages all of these steps on your behalf.

In the old (monthly) system, the total energy generated over a month was netted in one step against the total energy consumed that month. In the new system each hour is assessed separately: the energy generated in a given hour is matched only with the energy consumed in that same hour. Surplus generation at midday becomes subject to sale at the relevant tariff; evening consumption (when there is no generation) cannot benefit from netting. Therefore, the hourly overlap of generation and consumption, and correct system sizing, have become critical.

Residential (household) subscribers are not affected by this change; household rooftop PV systems continue to be subject to monthly netting regardless of installed power. Commercial and industrial rooftop PV systems and ground-mount PV plants, however, fall within the scope of hourly netting. In this segment, facilities with high daytime consumption benefit the most; for businesses whose consumption drops outside working hours, integrating battery storage (BESS) to cover evening consumption becomes increasingly meaningful.

In the new application, the generation that can be sold to the grid for payment is limited to twice the previous year's consumption. After the netted amount is deducted from this limit, the remainder can be sold; generation exceeding the limit is transferred to YEKDEM free of charge. For this reason the system should be carefully sized to consumption data, so as not to create idle generation by building it larger than necessary.

Systems based on self-consumption and within the connection (contracted) power limits are installed under "unlicensed electricity generation" and do not require a separate generation licence. Nonetheless, formal processes such as the connection application, project approvals and the connection agreement must be completed. Your connection power and the maximum capacity that can be installed are determined by your meter/subscription setup and the distribution company's capacity situation; we assess this on your behalf before the application.

This is determined by an engineering assessment carried out before installation. The main criteria are: the roof's load-bearing capacity (structural adequacy under added panels, structure, snow and wind loads), roof type and covering (sandwich panel, trapezoidal sheet, membrane, tile), tilt and orientation (south is the most efficient orientation in our country), surrounding shading elements, and the usable net area. Installation on a structurally inadequate roof can cause both structural damage and safety risk. With a free preliminary survey we can determine your roof's suitability and approximate capacity.

Quality photovoltaic panels typically generate for 25–30 years. Panels experience a natural performance decline (degradation) of roughly 0.4–0.5% per year; manufacturers therefore usually offer a linear performance warranty guaranteeing about 85% of the initial power at the end of year 25. Inverters have a shorter life (typically 10–15 years), and their warranties can be extended when needed. Maintaining the expected output depends on regular maintenance (O&M).

An unmaintained plant can lose a significant portion of its annual output due to soiling, shading, hot spots and inverter faults — a loss that often exceeds the cost of a maintenance contract. In line with IEC 62446 (maintenance, testing and inspection) and IEC 61724 (performance monitoring), Ventira provides thermographic (IR) module scanning, electrical tests (Voc/Isc, insulation resistance Riso, I-V curve), inverter and panel checks, connection torque checks, panel cleaning and remote performance ratio (PR) monitoring.

In the hourly-netting era, battery energy storage systems (BESS) — used to store surplus daytime generation for evening use — are becoming increasingly meaningful. BESS provides benefits such as self-consumption optimisation, peak (expensive-hour) management and backup of critical loads during grid outages. Your new or existing PV system can be made storage-ready with a hybrid inverter setup, so you can later expand it by simply adding a battery module. Its feasibility is evaluated according to your consumption profile and electricity tariff.

Standard grid-connected (on-grid) systems automatically shut down during an outage for the safety of personnel working on the grid (anti-islanding protection). If you also want electricity during an outage, a battery-backed hybrid or backup (off-grid-supported) system is required. We can design this solution according to the critical loads you want to back up.

Ventira provides end-to-end electrical engineering and contracting services in turnkey PV (EPC) installation, battery energy storage (BESS), substations and transmission lines, low-voltage electrical installations, high-voltage operation responsibility, measurement-testing-inspection, PV periodic maintenance (O&M) and EV charging stations. Operating since 2016, it holds TMMOB Chamber of Electrical Engineers signature authority and the relevant registration/authorisation certificates.

The process typically consists of: (1) Preliminary survey and feasibility (generation modelling and financial analysis). (2) Electrical and structural engineering, the connection application and obtaining the call letter. (3) Structural project approval and obtaining the suitability letter from the zoning authority. (4) Signing the connection agreement with the distribution company. (5) Equipment procurement, mounting and electrical installation. (6) Commissioning tests under IEC 62446, acceptance and energisation. (7) Operation and periodic maintenance (O&M). All stages are managed under a single contract.

Based in İzmir, we provide turnkey PV and electrical engineering contracting services across Türkiye, primarily in İzmir and the entire Aegean region (Manisa, Aydın, Balıkesir, etc.). Our reference projects are located in İzmir, Bursa, Niğde, Eskişehir, Tekirdağ and many other provinces.

You can request a free preliminary survey and feasibility study by filling in the contact form on our website, e-mailing info@ventira.com.tr, or reaching us via WhatsApp. When you get in touch with your last year's electricity consumption (from your bill/subscription), your facility address and any roof/land details, we can prepare a faster and more accurate assessment specific to your project.