"Net Metering" and "Net Billing": Clean Energy Options and the Equity Question

Solar energy is increasingly becoming a vital option for the modern world, with many countries accelerating support for residential solar panel installations to increase clean energy, reduce fossil fuel dependence, and enable people to generate their own electricity. However, behind rooftop electricity generation lies a critical issue regarding the "electricity billing system" that directly affects fairness for all electricity users nationwide—specifically the choice between "Net Metering" and "Net Billing" systems, which despite similar goals produce distinctly different impacts on the energy system and citizens.

Similarities and Differences Between Net Metering and Net Billing

Net Metering and Net Billing are electricity billing systems for homes with solar panel installations. Both share the common goal of encouraging people to produce their own electricity from solar energy and send excess power back to the electrical grid to reduce energy costs and increase household clean energy use. However, the key difference lies in "how the value of returned electricity is calculated."

Net Metering is a "kilowatt-hour offset" system where electricity produced by solar panels is deducted against electricity consumed from the grid on a one-to-one basis. This means excess solar production has a value equivalent to the retail electricity rate that consumers purchase from the utility—similar to depositing electricity in the system and withdrawing it later at the same value.

The advantage is that it provides relatively high returns to solar installers and incentivizes faster public adoption of solar panels. In some cases, it can use existing dual-directional spinning meters without equipment replacement. However, this system has a significant limitation: the buyback price does not reflect true electricity system costs, since what consumers pay includes not just generation costs but also power plant construction, transmission lines, distribution infrastructure, and entire network management expenses.

Net Billing, by contrast, is a "monetary offset" billing system that clearly separates the cost of electricity purchased from the grid and electricity sold back to the system. Excess solar power receives credits at a government-determined rate, which is typically lower than the retail electricity price because it accounts for comprehensive electricity system costs, including network maintenance and energy management. This system requires replacing existing meters with smart digital meters that can measure both purchased electricity and grid-injected electricity at each time interval to calculate net electricity costs.

The advantage is that it allows pricing flexibility to match energy costs during different periods, properly managing electricity system expenses without shifting costs to overall consumers. However, while both systems promote clean energy, Net Metering benefits solar installers more, while Net Billing is viewed as a more "balanced" approach that better protects fairness for all electricity users by reducing costs that might otherwise burden non-solar households and allowing the government greater flexibility to adjust solar buyback rates according to future energy circumstances.

Why Net Metering May Burden Non-Solar Users

Although Net Metering appears beneficial to solar panel installers, it actually creates burdens on others.