Recently, I’ve been paying attention to an interesting investment direction—energy storage concept stocks. As the global energy transition accelerates, large-scale deployment of green energy such as wind power and solar power is ramping up. Combined with the surge in electricity demand driven by the widespread adoption of electric vehicles, energy storage systems have become an unavoidable part of the energy industry. Put simply, it’s about storing excess electricity and using it when needed—this is what allows green energy to provide stable power in a real and consistent way.

I’ve noticed that both Taiwan stocks and U.S. stocks have plenty of companies benefiting from this wave of opportunities. The energy storage industry chain is actually very long. From battery manufacturing, to system integration, to power equipment, and even upstream raw material supplies—each link offers opportunities. If you want to invest in energy storage concept stocks, you can approach it from these angles.

First, let’s talk about battery manufacturers. Tesla (TSLA) is strong not only in electric vehicles—its Megapack and Powerwall energy businesses are also global leaders. In the U.S. market, there’s Enphase Energy (ENPH), which has a fairly high penetration rate in residential energy storage batteries. QuantumScape (QS) is betting on next-generation solid-state batteries, and it’s currently in a critical phase as it shifts from R&D toward mass production. In Taiwan, Xinshengli (4931) focuses on lithium battery modules, while Changyuan Technology (8038) develops lithium iron phosphate materials and systems—both of them are representative players.

System integrators are another track worth looking at. In the U.S., Fluence Energy (FLNC) is a global leader in grid-scale energy storage; it’s a joint venture between Siemens and AES. Stem (STEM) has an AI software platform called Athena, which can automatically decide when to charge and discharge based on electricity prices. This kind of software capability will be very valuable in the future. In Taiwan, Delta Electronics (2308) is the strongest integrator in the country, offering a full line—from power conversion systems to energy management software. Chunghsing Electric (1513) has a large share in Taipower’s frequency regulation ancillary services market, and it has performed well in recent years.

Power equipment manufacturers can’t be ignored either. NextEra Energy (NEE) is the world’s largest renewable energy operator, with a strong “combination punch” of wind, solar, and energy storage. Vistra Corp (VST) is even more interesting—turning old thermal power plants directly into the largest energy storage bases in the U.S. In Taiwan, Hua Cheng (1519) is a leading transformer company, and A-Li (1514) has many distribution panels and inverters, which are used in a lot of green energy projects.

Upstream raw material supply chains are also crucial. Albemarle (ALB) is the world’s largest lithium miner, controlling core battery raw materials. Formosa Plastics (6505), through its subsidiaries, supplies electrolyte raw materials and is also laying out research and development for battery cells. Compr (4721) and MGC (4739) are important suppliers of cathode materials such as nickel sulfate and cobalt sulfate.

Why is this direction worth looking at now? According to BloombergNEF’s forecast, global demand for energy storage installations will keep rising. By 2030, excluding pumped hydro, cumulative energy storage capacity will surpass the threshold of terawatt-hours, with most provided by lithium-ion batteries. To achieve their 2050 net-zero carbon emissions targets, countries are investing large amounts of capital into researching and developing new energy. In the UK, wind power already provides 32.4% of electricity. The problem is that wind power output is unstable, and negative electricity prices even occur in the early morning. This is why energy storage facilities have become a key piece for the widespread application of new energy.

Personally, I believe that as electric vehicles become more widely adopted, demand for green energy will increase. In addition, AI may significantly boost electricity consumption, so long-term demand for energy storage systems is likely to keep growing. Many people will also look at energy-saving concept stocks as a supplementary idea, but energy storage is truly the core solution for the energy structure problem. Because these concept stocks are mainly driven by government policies in various countries, their outlook is relatively stable, and they tend to have higher transparency and predictability.

However, it’s important to remind you that not all energy storage concept stocks are worth investing in. Some companies lack technological competitiveness—especially new firms with weaker foundations. If they are unable to achieve break-even results over the long term, their stock prices will face enormous pressure. Investors must carefully select stocks, stay attentive to the holdings they choose, and manage risks well. When either fundamentals or technical conditions turn around in the wrong direction, discipline and risk control are the deciding factors that determine whether you can ultimately profit.