The distributed energy boom is intensifying constraints on grid capacity, making transformer-area storage a vital tool for modern power networks. Shenwan Hongyuan Group Co.,Ltd. emphasizes that this segment is shifting from pilot demonstrations to large-scale deployment, unlocking a market with the potential to reach gigawatt-hour scale.
In the near term, the brokerage highlights the importance of tracking grid procurement and bidding volumes, while the medium-term focus should be on establishing market-based revenue mechanisms. Key investment opportunities lie with storage system integrators that possess strong relationships with grid operators, equipment makers offering grid-adaptive and cluster management capabilities, and virtual power plant or integrated energy service providers skilled in distributed resource aggregation, power trading, and cross-regional operations.
The rapid adoption of distributed photovoltaics and charging piles is driving a transformation of distribution networks from one-way to two-way power flows. This shift is causing issues such as reverse power surges, voltage violations, and transformer overloads in certain areas. By enabling localized charge and discharge cycles, transformer-area storage offers a practical solution for managing power flows, supporting renewable integration, peak shaving, dynamic capacity expansion, and emergency supply, thereby strengthening overall grid flexibility.
Competition in this space is moving beyond simple equipment supply to require comprehensive capabilities in grid adaptation, system integration, and aggregated operations. For project deployment, the primary near-term approaches include grid-led unified construction and equipment procurement. Third-party investment and grid leasing models are more suitable for seasonal overloads and temporary supply assurance. Over the long run, aggregating these resources through virtual power plants to participate in spot markets, ancillary services, and demand response is expected to shift the industry from one-off equipment sales to a sustainable model combining hardware, maintenance, and ongoing operations.
The strategy of using storage instead of traditional grid upgrades is broadening the scope of transformer-area management. Given that storage offers faster construction, lower retrofitting costs, and diverse revenue streams, it holds considerable value as a flexible alternative. Considering approximately 5 million distribution transformer districts nationwide, with an assumed overload ratio of 40% and a planned retrofitting rate of 20%-30% during the 15th Five-Year Plan period, the potential market is estimated at 240-480 GWh, based on an average unit capacity of 600-800kWh. This positions grid-side storage as a significant new growth driver for the broader energy storage industry.
Key risks to monitor include weaker-than-expected demand for distributed energy and transformer-area management, delays in grid investment and project construction, and slower-than-projected development of the transformer-area storage business model.