Even though $4 trillion a year sounds like enough money to fix almost anything, experts say it still won’t solve one of renewable energy’s biggest problems: storing power when the sun isn’t shining and the wind isn’t blowing. That gap between money and solutions is becoming harder to ignore.
Some ecosocialist proposals call for spending $4.1 trillion annually over ten years to transform the U.S. energy system. But storage technology isn’t ready to keep up. Today’s lithium-ion batteries work fine for short periods. They can’t handle the seasonal swings that come with relying on wind and solar year-round. Winter months, cloudy stretches, and calm wind days can last weeks. No battery on the market today can cover that.
Today’s batteries can handle hours. They can’t handle weeks of winter clouds and windless skies.
Researchers are working on next-generation options like flow batteries, solid-state batteries, and new materials for battery anodes. But none of these are proven at the scale needed. Estimates suggest the U.S. alone would need hundreds of gigawatts of storage to keep the grid reliable. That would push total renewable buildout costs from $1.5 trillion to roughly $4 trillion, according to Wood Mackenzie estimates. The firm put the full price tag for 100% U.S. renewables by 2030 at $4.5 trillion — and that doesn’t even include the cost of shutting down oil, gas, and coal industries, retraining workers, or building out an estimated $700 billion in new transmission lines.
The funding challenges don’t stop at borders. Developing countries face a $4 trillion investment gap for sustainable energy. Clean energy foreign investment hit $544 billion in 2022, well below what’s needed. Sovereign wealth funds hold $11.6 trillion in assets but have committed less than $10 billion to climate projects. The reason is simple: energy storage projects don’t deliver the predictable returns those funds require. Adding to this concern, global FDI flows fell by 22 per cent in 2022, with the least developed countries seeing inflows drop by as much as 16 per cent.
Globally, expert estimates suggest the renewable shift needs $9 trillion annually through 2050 just for generation, grid upgrades, and storage. The money being discussed today falls far short. And without solving the storage problem, even the largest investments won’t keep the lights on reliably. Compounding the challenge, pumped hydroelectric storage currently accounts for 94% of global energy storage capacity, revealing just how limited the alternatives remain at scale.
References
- https://www.utilitydive.com/news/transitioning-us-to-100-renewables-by-2030-will-cost-rate-payers-45t-wo/557832/
- https://www.gp.org/gnd_petition
- https://www.youtube.com/watch?v=ZaDxHmX2Wq0
- https://news.un.org/en/story/2023/07/1138352
- https://jointsdgfund.org/article/sovereign-wealth-funds-struggle-turn-their-trillions-climate-finance
- https://www.eia.gov/todayinenergy/detail.php?id=65445
