The Big Problem With Solar Power

Solar power is often marketed as “cheap,” but the real-world cost picture gets much less flattering once intermittency and storage are included. The core issue is simple: solar panels only generate electricity when the sun is shining, so profitable power requires enough battery capacity to cover evening demand—and that storage adds substantial cost, along with losses and the need to handle weather and seasonal swings.

A common metric used to compare energy sources is the levelized cost of electricity, which rolls construction, operation, and decommissioning into one figure. Early estimates frequently place solar around roughly $40 per megawatt-hour, with wind even cheaper and solar’s low carbon emissions making it look like a clear environmental win. But more comprehensive calculations from Lazard—covering solar farms in North America or similar sun conditions—raise the realistic range to about $50–$130 per megawatt-hour. Those numbers land in the same neighborhood as modern gas plants and, at the lower end, coal.

Other research points in the same direction. Germany’s Fraunhofer institute, described as strongly pro-solar, estimated €60–€225/MWh and concluded that solar is comparable to gas on average, and sometimes more expensive. The gap between optimistic and realistic figures comes down to two main modeling choices: many cheaper estimates omit battery storage, and they assume unusually sunny sites that don’t represent much of the world.

Seasonality makes the problem sharper in places where winter demand is highest. In much of Europe and North America, heating needs peak when sunlight is weakest—so solar’s output and the grid’s demand don’t align. Storage can buffer some of that mismatch, but batteries have limited efficiency and must be sized for longer stretches of low generation, not just a few evening hours. That reality helps explain why solar receives heavy subsidies even when panel prices fall.

Subsidy totals underline the scale of public support. In Germany, renewable subsidies are estimated around $10–$20 billion per year; in the United States, roughly $80 billion per year is cited, though that figure includes support for electric vehicles. Either way, the spending is large enough to fund multiple nuclear power plants, depending on how one compares capital costs.

The practicality of solar also varies sharply by geography. Near the equator—where cloud cover is lower—solar can carry more of the load, with China and Australia offered as examples. In middle and Northern Europe, and in the northern United States and Canada, solar’s contribution is more limited because the region is far from equatorial sunlight and lacks the vast, uninterrupted land area that can be used for large-scale generation.

The takeaway is not an anti-solar stance. Solar can be valuable, especially for predictable summer electricity needs like powering air conditioning. But calling it “cheap” is misleading when the full system—storage, weather variability, and seasonal demand—enters the calculation. Falling panel and battery prices may improve the economics over time, yet the transcript’s central message is that the headline cost comparisons often leave out the very factors that determine what electricity actually costs when the sun isn’t available.