On-grid system

On-grid systems are solar power installations that are directly connected to the public electricity grid. These systems offer an efficient way to generate renewable energy, optimize self-consumption, and feed surplus electricity into the grid. They are ideal for homes, businesses, and public institutions that want to reduce their energy costs and contribute to the energy transition. This article explains how on-grid systems work, their advantages, and how they can be used.

What is an on-grid system?

An on-grid system, also called a grid-connected system, is a solar power system that is connected to the public electricity grid. The electricity generated is first used for self-consumption, while surplus energy is fed into the grid. At the same time, electricity can be drawn from the grid if needed, for example, at night or on cloudy days, when the solar power system does not produce enough energy.

How does an on-grid system work?

An on-grid system consists of several components that work together to ensure a reliable energy supply:

• Solar modules: These generate electricity from solar energy and convert it into direct current (DC).
• Inverter: The inverter transforms direct current into alternating current (AC), which is suitable for household appliances and the power grid.
• Grid connection: Excess electricity is fed into the public grid via a feed-in meter.
• Electricity meter: The meter measures both the electricity fed into the grid and the electricity drawn from the grid, which is important for billing.

Advantages of an on-grid system

On-grid systems offer numerous advantages that make them a popular choice for solar power plants:

1. Cost savings

Using solar energy can significantly reduce electricity costs. In addition, feed-in tariffs for surplus electricity create another source of income.

2. Optimizing self-consumption

On-grid systems make it possible to use self-generated electricity directly, thereby reducing the need for grid electricity.

3. Unlimited power supply

Since on-grid systems are connected to the public grid, the electricity supply is guaranteed even in the event of insufficient solar energy.

4th contribution to the energy transition

With an on-grid system, you actively contribute to the reduction of CO₂ emissions and support the integration of renewable energies into the electricity grid.

Challenges in on-grid systems

Although on-grid systems offer many advantages, there are also some challenges that should be considered:

• Dependence on the grid: In the event of a power outage in the grid, the solar system usually cannot supply energy, as the inverter requires a grid frequency for operation.
• Compensation rates: The feed-in tariff for surplus electricity has decreased in recent years, which can affect profitability.
• Regulatory requirements: Grid connection requires compliance with certain technical standards and approvals.

Typical applications of on-grid systems

On-grid systems are suitable for a wide variety of applications:

• Private households: Homeowners can reduce their electricity costs and generate sustainable energy with on-grid systems.
• Businesses: Companies benefit from the savings and the opportunity to market surplus energy.
• Public institutions: Schools, hospitals and administrative buildings use on-grid systems to reduce operating costs and to serve as role models.

Planning an on-grid system

Installing an on-grid system requires careful planning to achieve the best possible performance:

• Sizing: The size of the solar system should be tailored to the energy demand and the available roof area.
• Site conditions: The orientation and tilt of the solar modules, as well as possible shading, influence energy production.
• Compatibility: The inverter and other components must be compatible with the grid requirements.
• Permits: Connecting to the grid requires compliance with certain regulations and registration with the grid operator.

Conclusion: On-grid systems as an efficient energy solution

On-grid systems are an efficient and sustainable solution for harnessing solar energy. They provide a reliable power supply, reduce energy costs, and actively contribute to the energy transition. With proper planning and installation, on-grid systems can be a worthwhile long-term investment for both private households and businesses.