Updated 13 November 2026

For financial analysts, “grid parity” is simply a term used to describe when a clean energy source (such as solar and wind) costs the same or less than a conventional energy source from the grid (such as coal, oil, or natural gas). At the very least, that is the short version. Grid parity, however, is something of a Holy Grail for climate campaigners, a tipping point that accelerates the move to renewable energy in many ways and for various reasons. However, like many other financial terminology, this term must be clarified.

What is Grid Parity?

Grid parity, in technical terms, occurs when an alternative energy source generates power at a levelized cost of electricity equal to or less than the cost of purchasing power from the electrical grid. In other words, as previously stated, grid parity occurs when the cost of alternative energy equals or lowers that of power generated by traditional energy sources such as fossil fuels. It is one of the essential factors considered by energy experts when analyzing the economic viability of an alternative energy type for widespread development and adoption.

Source: State Dept./J. Maruszewski

Why Does it Matter?

Grid parity is the point at which the overall costs of renewables cross the line and become equal to or less than those of fossil fuels, making the we-can’t-afford-to argument. Once the economic argument is removed, beautiful things happen in the market, such as more investment in clean energy projects and technology, initiating a virtuous cycle in which wind and solar continue to become more affordable and accessible. When sustainable energy becomes more than a moral imperative, it’s an obvious decision.

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How do we Determine Grid Parity?

It ultimately boils down to the levelized cost of electricity, or LCOE, which is the cost parameter most analysts use when determining grid parity. It measures the lifespan generated energy and the cost of electricity from a specific technology, beginning with its manufacture and ending with the generation of its last watt. Using LCOE helps to eliminate biases between different technologies. It is also the preferred benchmarking method for determining the cost-effectiveness of various energy-producing technologies. Simply put, LCOE is used by analysts to determine whether an alternative form of energy is on track to achieve grid parity and become a viable energy source for customers.

Retail vs Wholesale Grid Parity

There are two quite different benchmarks, and it matters which one is meant:

• Retail (socket) parity compares the cost of electricity from a rooftop system with the price a household or business pays for grid power, including network charges and taxes. Because retail prices are much higher than generation costs, rooftop solar reached this kind of parity first. Germany was one of the first countries to get there, around 2011 to 2012, when the cost of power from new rooftop systems fell below household electricity prices.
• Wholesale (generation) parity compares a new solar or wind farm with a new or existing fossil-fuel power station selling into the wholesale market. This is a much tougher test, because it compares like with like at the power-station gate.

Subsidised vs Unsubsidised Grid Parity

Early claims of grid parity often depended on subsidies such as feed-in tariffs, tax credits or cheap loans. Unsubsidised parity, where renewables win on cost alone, is the stronger milestone. Lazard’s 2025 Levelized Cost of Energy+ analysis for the US, which excludes federal tax credits, put new utility-scale solar at about US$38 to 78 per megawatt-hour and onshore wind at US$37 to 86, against US$48 to 109 for a new gas combined-cycle plant.

What Variables Influence When a Region Obtains Grid Parity?

Grid parity is a dynamic concept that varies by location. Factors such as the amount of sunlight in a region (if we’re talking about solar energy), variances in financing conditions, and existing electricity rates and installation costs in the different areas all influence the LCOE and when a region approaches grid parity. For example, Nevada generally receives more sunlight than Washington. The difference in the amount of sun between the two states, combined with other considerations, means Nevada has much more potential for solar energy and may have an advantage in reaching grid parity first. Despite regional disparities, and given recent trends of rapidly declining solar energy costs, many regions have now crossed the line. (An earlier GTM Research analysis forecast that 42 US states would reach grid parity by the end of 2020; utility-scale solar and wind costs have kept falling since.)

Where Grid Parity Stands Today

Beyond Grid Parity: Storage Parity

Cheap solar and wind power is only part of the story, because the sun sets and the wind drops. The next milestone is often called storage parity or “firm” parity: the point at which renewable power plus enough battery storage to supply it when needed is as cheap as power from a fossil-fuel plant that can run on demand. Battery costs have fallen sharply, and auctions such as India’s 2025 solar-plus-storage tender at about ₹2.86/kWh suggest it is already within reach in sunny markets. Cost comparisons such as LCOE also leave out some system costs, such as extra transmission lines and backup capacity, which is why grid parity on paper does not automatically mean renewables can replace every fossil plant overnight.

In conclusion, Grid parity varies by area and depends on factors such as solar availability and current energy prices; it is not a global comparison of renewable energy costs to fossil-fuel electricity from the grid. It does, however, help to chart progress in various places worldwide. As we work to bring climate change solutions to the forefront of energy customers’ and policymakers’ thoughts, seeing cities, regions, and countries achieve it demonstrates how the worldwide move to clean energy is accelerating. And, because all power is generated someplace, local and national energy regulations, as well as utility practices, can have a significant impact on whether this shift accelerates or slows.

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