What is the ON GRID Solar roof application?

As the world looks for more sustainable ways to produce energy, solar energy is becoming an increasingly popular option for both homes and businesses.

One type of solar energy system that has attracted great attention in recent years is the grid-connected solar roof system , also known as on-grid .

On grid systems are the most suitable choice if you are connected to the electrical grid.

In these systems, electricity obtained from solar energy is directly connected to the grid and used instantly. While designing solar energy systems, the amount of energy required or required to be produced is determined. Afterwards, DC electrical energy begins to be produced when the sunlight coming from the atmosphere comes into contact with the solar modules. This produced energy works connected to the central city grid system with inverters that have high cycle power and can be connected to the central grid.

In this way, the electrical energy produced from the panels is sent directly to the grid system. As long as the radiation and field conditions are suitable, it is possible to produce electrical energy at the desired power and rate with these systems that generate electricity connected to the grid.

The basic components of this system are:

• inverter,
• photovoltaic panel,
• Bidirectional counter (Network counter)

Thanks to the ability of on-grid solar roof systems to receive energy both from the grid and from solar panels, all needs can be met from solar panels and the remaining energy can be taken from the electricity grid. In these systems, when more electricity is produced than used, this energy is loaded onto the grid and can be sold to electricity distribution companies. That is, when more electricity is produced than used, financial gain can also be achieved.

Uses and Benefits of ON GRID Solar Roof Systems

In the on-grid solar roof system, solar panels can be installed on the roofs of all kinds of commercial, institutional and industrial buildings, as well as on the roofs of residences. In order to support rooftop installations for homes, special support has begun to be provided for systems of 10 kW/hour and below. With this support, license-free electricity production has become possible for home systems of 10kW/hour and below.

The state guarantees payment for each kW value of excess production for 10 years.

Documents Required for Solar Energy Installation for Home

You need the following documents to apply for a solar energy system for your residential building.

• Identification
• Application form
• Subscription documents
• Notarized copy of the joint decision of the apartment management regarding the use of the roof
• Single line diagram (taken from electrical engineer)

Documents Required for Solar Energy Installation for Apartments

• For solar energy installation, approval is required from each flat that has the right to use the roof.
• The installation power of the solar energy electricity production facility to be installed on residential roofs must not exceed 10 kW for each flat and the production and consumption facility must be located at the same point.
• Notarized copy of the joint decision of the apartment management regarding the use of the roof
• The area to be covered by the solar energy system to be installed in common areas such as roofs or terraces cannot exceed the area corresponding to the independent section owned by the flat owner, that is, the land share of his flat.
• The roof or terrace where the solar energy system will be installed must have sufficient space for solar power installation for all flats in the apartment.
• If all flats in the building install a solar energy system, the building statics should not be damaged.
• The solar energy system should not disrupt the aesthetics of the building.

A malfunction or water leakage etc. caused by the solar energy system. In such cases, all technical precautions must be taken to prevent other apartment residents from being harmed.

Documents Required for Application for Unlicensed Electricity Generation for Residential, Commercial and Workplaces

• Petition and application form
• Power of attorney
• Trade Registry Gazette and Partnership Structure
• Deed (Original or Notarized)
• Receipt Application Fee
• Single line scheme
• SPP Technical Evaluation Form
• Application Sketch
• Building Permit or substitute document
• Notarized letter for installation in public areas

With the regulation on amendments to the OIZ Implementation Regulation, solar power based production facilities are allowed to be established on the ground, provided that they are primarily installed on the roof and facade, and if the roof and facade application cannot be done in terms of static and architectural aspects or if additional capacity is needed, the floor area of ​​the facility does not exceed 25% of the parcel area. . OIZ decides the suitability of the location of the facility within the parcel in accordance with the relevant legislation.

Unlicensed Electricity Generation Regulation

The electricity produced by solar energy and supplied to the grid is subtracted from the electricity used and reflected on the invoice; In other words, reaching an economic agreement between the electricity distribution company and the person producing electricity with unlicensed solar power plant regarding the electricity used and the electricity sold to the grid is called offsetting.

According to the Unlicensed Electricity Generation Regulation, which came into force in Turkey in May 2019, installed power up to 10kW is allowed in residences and up to the connection contract power in workplaces.

For example, a rooftop solar panel with an installed capacity of 400kW can be projected on a factory with a 400kW connection contract.

According to the Unlicensed Electricity Production Regulation in the Electricity Market, monthly settlement is made by following the following steps:

• Electricity supply to the grid and electricity withdrawal values ​​from the grid are recorded on an hourly basis.
• Output and traction values ​​are collected separately.
• The difference between the sum of the delivery and traction values ​​is calculated.
• If the supply to the grid is more than the electricity consumed, the electricity distribution company is billed for the current market value.
• If the consumption is more than the electricity sold to the grid, the electricity distribution company bills the difference.

What is Net Metering?

The measurement system in which electricity production and consumption is recorded instantly is called net metering. The electricity supplied to the grid and the electricity drawn from the grid are measured with bi-directional meters. In unlicensed solar energy production, metering is required for offset.

In a solar power system with net metering, produced and consumed electricity are recorded separately with bi-directional meters and the consumed energy is offset with the production amount. In other words, offsetting allows the electricity produced to meet the electricity consumed. In this way, it is deducted from the consumption price. Excess electricity recorded as being produced in excess of consumption in net metering is transferred to the grid for the benefit of all users after clearing.

A series of legal procedures are required to install on-grid rooftop systems.

These operations:

• Providing technical documents to the distribution company,
• Submitting various documents to the distribution company for project approval,
• It includes processes such as signing a connection agreement with the distribution company.

All workplaces and agricultural enterprises are within the scope of the law. Solar power plants can be installed on the roofs and facades of site managements, detached houses, villa owners, factories and all workplaces that have a 2-year lease contract or whose title deed belongs to them. Thanks to the ten-grid rooftop systems to be installed upon completion of the legal processes, savings can be made on distribution expenses and taxes in the electricity bill and possible price increases will be protected. Solar energy produced in on-grid systems is not stored in batteries and is instantly transferred to the grid. The distribution company purchases this energy at an active tariff in accordance with the law. In this way, both revenue can be generated and battery costs that may arise are prevented.

Situations to consider when installing rooftop solar systems:

• The area of ​​the roof to be installed,
• The slope of the roof,
• Suitability of roof material and statics,
• Electricity consumption of the facility to be installed and the daily, monthly and annual distribution of this consumption,
• Which article the application is based on (Articles 51c, 51h or 51ç)
• Whether there is more than one production and/or consumption point in the same distribution region of the facility and the subscriber.

These situations reveal the importance of working with an engineering and installation company.

Self-Consumption Model: In the self-consumption model, the energy produced in the rooftop solar power plant is consumed completely and is not sold to the grid. In order to prevent energy flow towards the grid, a "limiter" device within the inverter is used. As soon as energy production exceeds consumption, the limiter system comes into play, constantly adjusting the AC production of the inverter according to consumption and no electricity is sent to the grid.

Self-consumption solar energy system design: What should be taken into consideration when designing self-consumption model solar power plants is to create a system that will produce as much as the consumption amount. Since excess production is not given to the grid, it is wasted and causes unnecessary investment costs. It is beneficial to be preferred by residences and workplaces with intense consumption during sunny hours during the day. Another advantage of installing a self-consumption solar energy system is that the system can be installed without going through official processes.

Sustainable, Renewable, Clean and Efficient Energy: Rooftop solar energy systems produce clean and renewable energy by utilizing the sun's light and radiation through photovoltaic (PV) panels. The absence of any harmful gases or emissions while generating energy makes rooftop solar energy completely environmentally friendly and reduces the carbon footprint. Unlike fossil fuels, solar systems do not produce noise and vibration and provide silent operation to their users, while noise pollution is prevented by using these systems. The absence of moving parts in on-grid solar roof systems and the fact that they have fewer parts than other solar energy systems significantly reduces maintenance costs. In addition to low maintenance costs, easy installation and battery-free nature have increased the popularity of these systems. In general, their lifespan of more than 25 years and the fact that they reduce or completely eliminate grid dependency provide the user with long-term energy independence. This also provides the user with vital energy that may be required in emergency situations such as disasters. With solar roof systems, you can also increase the value of your property by making it energy efficient and make it more attractive to potential buyers.