Recently, I’ve been paying attention to an interesting investment theme—the energy storage industry. As the global energy transition accelerates, electric vehicles become more widespread, and renewable energy like wind power and solar power comes online at scale, energy storage has in fact become an indispensable part of the energy system.

I’ve noticed that a popular theme is gradually taking shape in the stock market: energy storage equipment concept stocks. In simple terms, these stocks are shares of listed companies engaged in energy storage technology, facilities, and solutions. But this industry chain is actually quite long, spanning multiple segments such as battery manufacturing, system integration, power equipment, and materials supply.

Battery manufacturers are the most core players. In the U.S. market, companies like Tesla (TSLA), Enphase Energy (ENPH), and QuantumScape (QS) have leading advantages in this area. In Taiwan, there are companies like New Power (4931) and Longyuan Ke (8038). That said, honestly, battery plants face dual pressure from both raw material price volatility and international competition.

The role of system integrators is also crucial. They not only provide batteries, but also integrate inverters, battery management systems, and energy management systems—delivering a complete solution. In the U.S., there are Fluence Energy (FLNC), Stem (STEM), and Generac (GNRC). In Taiwan, there are Delta Electronics (2308), ChungHsin Electric (1513), and Senwei Energy (6806). I think Delta Electronics, as Taiwan’s strongest system integrator, offering everything from power conversion systems to energy management software, is definitely worth paying attention to.

Traditional power equipment manufacturers also benefit from this wave. For example, companies like Huacheng (1519), A-Li (1514), and Shidian (1503)—which make transformers, switchgear/distribution panels, and inverters—are seeing a substantial level of demand, because energy storage systems need to be connected to the grid.

As for the materials supply chain, in the U.S. market there are lithium mining leaders like Albemarle (ALB). In Taiwan, there are companies like Formosa Plastics (6505), Compeq (4721), and Meiqima (4739), among others.

So, why am I optimistic about energy storage equipment concept stocks? According to BloombergNEF’s forecast, by 2030, the cumulative global energy storage installations will break through the one-terawatt-hour threshold, with most of them provided by lithium-ion batteries. Countries are putting money into developing new energy, and the cost of wind power and solar power has already become profitable. But because the output of these renewable energy sources is unstable, energy storage facilities are key. Since most of this is government-led, the outlook for energy storage concept stocks is relatively stable, with higher transparency and predictability.

On top of that, with the growing adoption of electric vehicles, rising demand for renewable energy, and even the possibility that AI could significantly increase electricity consumption, demand for energy storage systems is expected to maintain long-term growth. However, investors still need to be careful. Some companies lack sufficient technical competitiveness, and some new companies have relatively weak foundations. If they are unable to reach break-even over the long term, their stock prices could face enormous pressure. Therefore, stock selection must be prudent, staying attentive to the stocks you hold and controlling risk is important.

Overall, clean energy cannot do without energy storage technology, and countries will keep investing in the future. Whenever relevant policies are announced, they may stimulate market opportunities. But like all high-tech sectors, whether a company’s R&D can ultimately be commercialized and generate profits still carries risks. As a result, the ability to judge based on fundamentals and technology—together with discipline and risk control—is the key to ultimately making profits.