Oversupply of energy storage inverters

But the risks for power-system security of the converse problem — excessive energy storage — have been mostly overlooked.
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6 FAQs about [Oversupply of energy storage inverters]

Why is energy storage oversupply a problem?

The expansion is driven mainly by local governments and lacks coordination with new energy stations and the power grid. In some regions, a considerable storage oversupply could lead to conflicts in power-dispatch strategies across timescales and jurisdictions, increasing the risk of system instability and large-scale blackouts.

What is inverter oversizing?

Inverter oversizing refers to adding more DC power to an inverter than it is rated for. For example, if you connect 6 kWp of DC power to a 5 kW inverter, you oversize the system by 20%.

Is excessive energy storage a problem?

Spyros Foteinis highlights the acknowledged problem that an insufficient capacity to store energy can result in generated renewable energy being wasted (Nature 632, 29; 2024). But the risks for power-system security of the converse problem — excessive energy storage — have been mostly overlooked.

Is excessive energy storage a threat to China's power system?

But the risks for power-system security of the converse problem — excessive energy storage — have been mostly overlooked. China plans to install up to 180 million kilowatts of pumped-storage hydropower capacity by 2030. This is around 3.5 times the current capacity, and equivalent to 8 power plants the size of China’s Three Gorges Dam.

Should energy storage assets be deployed on the grid?

This creates a significant opportunity for operators deploying energy storage assets. While lithium-ion is currently the most prevalent battery storage technology on the grid, its characteristics restrict operators’ ability to earn revenue and address congestion.

Are the challenges of oversupply going away?

The challenges of oversupply aren’t going away. Renewable generation deployment and the associated shifts in grid management will continue to dominate the U.S. energy transition for decades to come, particularly as grid operators retire more than 200 GW of legacy generation capacity, primarily coal, within the next 10 years.

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