What is grid parity and how is it achieved?

• A. Grid parity occurs when renewable electricity costs equal or lower than retail electricity prices; achieved through technology improvements, economies of scale, and policy support.
• B. Grid parity occurs when renewable electricity costs are higher than retail prices.
• C. Grid parity is achieved only through subsidies.
• D. Grid parity is irrelevant to policy.

Answer: (A)

Grid parity means the cost of electricity from a renewable source is equal to or cheaper than what customers pay for grid power. It’s typically assessed by comparing the levelized cost of energy from the renewables with retail electricity prices.

This happens when costs from the renewable technology—capital, operation and maintenance, and financing—fall to a level that competes with the price of grid electricity. Achieving parity comes from a mix of improvements: better technology that boosts efficiency and performance, economies of scale that lower manufacturing and installation costs, and policy support that reduces risks and can lower financing costs or provide incentives. When these factors combine, renewables become financially competitive with, or cheaper than, buying power from the grid.

Context matters: parity can vary by location because resource quality, electricity prices, and grid conditions differ. Subsidies can help reach parity faster, but the fundamental idea is a renewable's cost structure versus retail prices, not subsidies alone. And parity is relevant to policy because policy shapes market conditions, investment risk, and the speed at which technologies and costs can improve.