The feed-in/feed-out meter, also known as a net meter, plays a key role in the operation of solar panel systems, as it allows for precise monitoring and balancing of the electricity drawn from and fed back into the grid.
How does the feed-in/feed-out meter work?
Measuring energy consumption: When the energy produced by the solar panel system is not enough to meet the household's energy needs (e.g., at night or on cloudy days), the home draws energy from the grid. The feed-in/feed-out meter records this amount.
Measuring energy production: If the solar panel system produces more energy than the household consumes, the surplus energy is fed back into the electrical grid. The feed-in/feed-out meter also measures this fed-back amount.
Netting (net metering): The meter continuously tracks the amount of energy drawn from and fed back into the grid. At the end of the period, the two values are compared, and the amount to be paid or credited is determined based on the difference.
Net metering versus gross metering
Net metering: Feed-in/feed-out meters most commonly use net metering. In this system, billing is based on the difference between the energy drawn from and fed back into the grid within one year.
Gross metering: In some countries, or with the introduction of new regulations, there may be a transition to gross metering, where energy purchased from the grid and energy fed back into the grid are treated separately, often at different prices.
Important information about the feed-in/feed-out meter
The feed-in/feed-out meter is installed by the electricity provider, so its installation and configuration are their responsibility.
The net metering system is advantageous for solar panel system owners, but it is worth paying attention to any regulatory changes that may affect the return on investment.
Summary
The feed-in/feed-out meter is an essential tool for solar panel system owners, ensuring accurate tracking of energy consumption and production. It helps households maximize the benefits of renewable energy sources and achieve significant cost savings in electricity consumption.