100 GW of new renewable capacity is not a milestone, but a physical threshold
In 2025, a record 100 gigawatts of new electricity generation capacity from renewable sources was recorded, according to data from Global Energy Monitor. This figure, equivalent to approximately 100 traditional power plants, does not represent a simple increase, but a structural breaking point in the global energy system. The data is significant not for its magnitude, but for its geographical distribution and its incompatibility with actual electricity demand. While renewable energy is growing at exponential rates, electricity output from coal has decreased by 0.6% in the same period, despite the addition of almost 100 GW of capacity. This discrepancy signals an asymmetry between production and use, where installed capacity does not correspond to a growing actual consumption.
The increasing renewable capacity is no longer a marginal option, but a physical balancing factor. Storage systems are not keeping pace with the speed of integration, creating a surplus of unused energy. In China and India, where 95% of the new coal-fired power plants have been built, the system has shown limited absorption capacity, with a reduction in output despite the increase in capacity. This indicates that the system is no longer able to manage an offer greater than demand, and that the surplus of renewable energy cannot be compensated by an increase in electricity demand.
The technical threshold: when capacity exceeds the system’s buffer
Exceeding the 100 GW capacity threshold for renewable energy in a year marks a turning point in the global energy balance. The effect is not only quantitative, but qualitative: the system is no longer able to manage energy flows that exceed its flexibility margins. The 0.6% decrease in coal output, despite the increase in capacity, indicates that the system is saturated. The energy produced cannot find outlets, and accumulates in the form of network losses, transmission overload, or forced disconnection.
This saturation is exacerbated by another trend: the reduction in transportation demand. According to a 2026 survey, 44% of US adults have reduced their driving time due to the average fuel price, which has exceeded $4.50 per gallon. This decrease in transportation demand, in parallel with the increase in renewable energy capacity, creates a chain reaction: less energy consumed, more energy produced, less capacity used. The system is in a condition of structural overproduction, where installed capacity far exceeds the actual utilization capacity.
The problem is not the production, but the flow management. Storage capacity is not yet sufficient to absorb peaks of renewable energy production. The surplus of energy cannot be stored, transferred, or used. The system is forced to deactivate production units or limit production, even when generation conditions are optimal. This behavior is a clear signal: the global energy system has exceeded the threshold of physical flexibility, and can no longer manage an energy supply that exceeds actual demand.
The Tactical Lever: Reducing Unnecessary Generation Capacity
The most effective point of intervention is not the expansion of storage capacity, but the reduction of unnecessary generation capacity. In India and China, where 95% of new coal-fired power plants have been built, the system has already exceeded the threshold of useful capacity. Adding new units does not improve the efficiency of the system, but increases its complexity and the risk of overproduction. The most logical strategy is not to build more capacity, but to decommission or not build units that are not necessary to meet actual demand.
A concrete example is the decision not to build further coal-fired power plants in areas with high penetration of renewables. In China, where wind and solar capacity has exceeded 40% of total production, adding new coal-fired power plants is no longer justified. The system already has a production capacity greater than demand, and adding new centralized units increases the risk of disconnection and network losses. The tactical lever is therefore the reduction of unnecessary generation capacity, not the increase of storage capacity.
The system stops pretending to be stable: the saturation threshold has been reached
The euphoria of 2025, which celebrated the expansion of renewable capacity as a success, hid a physical reality: the global energy system has exceeded the saturation threshold. Installed capacity is no longer usable, and the surplus energy cannot be managed. The system is no longer able to balance supply and demand, and is in a state of structural overproduction.
The physical threshold has been exceeded: it is no longer a matter of growth, but of managing the surplus. The system stops pretending to be stable when the installed capacity exceeds actual demand, and production units must be shut down to avoid overloads. The margin of flexibility is exhausted, and the system is in a state of structural instability. The next indicator to monitor is not the installed capacity, but the percentage of production units shut down due to overproduction. When this percentage exceeds 15%, the global energy system will have reached an irreversible physical breaking point.
Photo by David Millenov on Unsplash
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