On-grid solar systems are photovoltaic systems that connect to the national or regional electricity grid. These systems provide the opportunity to utilize solar energy while feeding excess energy back into the grid, thus generating cost savings or even income.
How does an on-grid solar system work?
Solar cells (PV panels): They convert sunlight into electricity that can be used immediately by the household.
Inverter : Converts the direct current (DC) generated by solar panels into alternating current (AC) to make it compatible with your home's electrical system and the grid.
Ad-take meter: A two-way meter that records the energy taken from the grid and fed back into the grid.
Grid connection: The system is connected to the local electrical grid, which allows energy to be used, fed back or taken from the grid as needed.
Advantages of the on-grid system
Energy cost savings: The system reduces the amount of energy purchased from the electric grid, as the energy generated by the solar panels can be used immediately.
Utilization of excess energy: Excess energy produced by solar panels can be fed back into the grid, and depending on local regulations, the energy value can be accounted for, and it can even generate income.
Reliable power supply: If the energy produced by solar panels is insufficient, the grid automatically supplements the needs, ensuring a continuous power supply.
Easy maintenance: On-grid systems operate without batteries, so they require less maintenance than off-grid systems.
Disadvantages of the on-grid system
Network dependency: Such systems do not work if there is a power outage, as the system is disconnected from the network due to safety regulations.
Local regulations: The value and billing conditions for regenerative energy may vary by country and provider, which may affect the economics of the system.
Initial investment: Although it can result in savings in the long run, installation costs can be relatively high.
Key elements of on-grid systems
Bidirectional meter: This meter measures the amount of energy fed back into the grid and taken from the grid, ensuring accurate billing.
Inverter: The inverter plays a key role as it converts direct current into alternating current and ensures the system's compatibility with the grid.
Energy consumption optimization: Household energy consumption can be scheduled to peak periods of solar energy generation to minimize grid energy usage.
Example of how an on-grid system works
| Period | Energy production (solar panels) | Energy consumption | Mains power source |
|---|---|---|---|
| Sunny morning | High | Low | Energy recovery |
| Afternoon rush hour | Medium | High | Grid energy supplement |
| Night | None | High | Energy consumption |
Summary
Grid-tie solar systems are an ideal solution for those who want to reduce their energy consumption while enjoying the benefits of renewable energy. These systems are economical, efficient and environmentally friendly, but it is worth considering local regulations and billing conditions before installing them. With regular maintenance and optimized operation, the systems provide long-term savings and sustainability.