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The direct consequence of overcapacity is a fierce price war. The average bid price for lithium-ion energy storage systems has plummeted like a slide, dropping repeatedly. In 2024, the year-on-year decline reached 47.82%, and this trend continued in the first half of 2025, with another year-on-year decline of 29.94%. In this price war, companies are willing to go to great lengths to compete for a limited market share, with some even offering cell prices below 0.4 yuan/Wh. Wh, akin to a war without smoke, with companies battling fiercely, severely compressing profit margins. The industry's average profit margin dropped from 15% in 2022 to less than 5%, leaving many companies struggling to survive.

Energy storage technology is like the “Transformers” of the energy sector, capable of flexibly storing and releasing electrical energy according to different needs. For example, when solar panels absorb a large amount of sunlight during the day but cannot generate electricity at night, the energy storage system can store the excess electricity from the day and release it at night, ensuring a more stable energy supply.

Imagine having a magical box that can store electricity anytime, anywhere, and release it when you need it. That's exactly what energy storage is—a “super power bank”! It can not only store free and eco-friendly energy like solar and wind power but also release it when needed, freeing our lives from the constraints of time and weather.

nds of homes. In Texas, a massive energy storage project is doing just that. The project, backed by BP and using Tesla’s Megapack technology, has a capacity of 81 MW/324 MWh. This means it can store enough energy to keep the lights on for a small city during peak hours. It’s like having a giant rechargeable battery that can kick in whenever the grid needs a boost. 2. The Long-Lasting “Energy Bank” in China In China, researchers have developed a sodium-ion battery that can last for over 1,000 cycles with minimal loss of capacity. This is a game-changer for renewable energy storage because it means these batteries can be used over and over again without needing frequent replacements. Imagine a battery that can store solar energy during the day and release it at night, all while lasting for years. This technology is making it possible to have reliable energy storage that’s both efficient and environmentally friendly

These benefits are attracting the attention of a growing number of investors. According to Bloomberg New Energy Finance (BNEF), global investment in residential energy storage reached $15 billion in 2022, a 70% increase year-over-year.

The battery is the heart of the home energy storage system and is responsible for storing electricity. Home energy storage batteries usually use lithium-ion batteries, which have high energy density, long service life and good safety.