To prevent excess power from being fed back to the grid in a grid-connected solar system, you can consider the following options.

1. Use a Consumption Monitoring System: Install a consumption monitoring system that tracks your household’s energy usage. This system can provide real-time data on your electricity consumption, allowing you to adjust your energy usage accordingly to match the solar power generation.
2. Install a Smart Meter: A smart meter can help monitor the flow of electricity between your home and the grid. It provides information about the amount of electricity you are using and the surplus electricity being fed back to the grid. With this data, you can adjust your energy consumption habits to make the best use of the solar power generated.
3. Implement Energy Management Devices: Use energy management devices that can control the flow of electricity between your home, the solar panels, and the grid. These devices can be programmed to prioritize the use of solar power within the household before allowing any excess power to be exported to the grid.
4. Install Energy Storage Systems: Consider adding energy storage systems, such as batteries, to store excess solar energy generated during the day. These batteries can then be used to power your home during times when solar energy production is low, such as at night or during cloudy days.
5. Utilize Power Diversion Systems: Power diversion systems, also known as solar diverters, can redirect excess energy to power specific appliances, such as water heaters or electric vehicle chargers, instead of exporting it to the grid. This way, you can make better use of the surplus energy within your household.
6. Adjust Solar Panel Orientation or Capacity: If excess power generation is a recurring issue, consider adjusting the orientation of your solar panels or reducing the overall capacity of your solar panel system. This can help better match the energy generation with your household’s energy consumption needs.

Consulting with a professional solar energy installer or an electrician experienced in grid-connected systems can provide you with tailored solutions to prevent excess power from being fed back to the grid, ensuring you make the most of your solar energy system while minimizing wastage.