SoftBank has made a significant strategic move to manufacture its own Energy Storage Systems (ESS) for its AI data centers.
This decision is driven by the explosive growth in power demand from artificial intelligence. The International Energy Agency (IEA) projects that by 2030, global data center electricity consumption will more than double, with AI being a primary driver. This surge puts immense pressure on power grids, making a stable, on-site energy supply not just an advantage, but a necessity.
SoftBank's strategy to tackle this challenge is a clear, multi-step process. First, it secured the ideal location by acquiring the former Sharp LCD factory in Sakai, Osaka, which came with existing power and cooling infrastructure. Second, it laid out ambitious plans for large-scale AI data centers, not only in Sakai but also in Tomakomai, Hokkaido. Third, faced with potential supply chain bottlenecks for batteries, it chose the bold path of vertical integration: making the batteries itself.
This move is perfectly timed with supportive external trends. The Japanese government is actively promoting this kind of integration through its 'Watt-Bit Collaboration' initiative and recent amendments to the Electric Utility Industry Law, which fast-track the development of large-scale power and transmission infrastructure. Furthermore, we're seeing similar trends in the U.S., where tech companies are directly investing in power generation to support their massive data centers, validating SoftBank's approach.
What makes SoftBank's plan particularly noteworthy is its rarity. Most cloud and AI companies secure power through agreements with utility companies or external ESS vendors. By choosing to design and manufacture batteries in-house, in partnership with innovative Korean startups like DeltaX and Cosmos Lab, SoftBank is taking direct control over a critical part of its supply chain. This includes developing both proven LFP batteries and next-generation, fire-safe zinc-bromine batteries.
With a target of producing 1 GWh of ESS annually by late 2027, SoftBank isn't just building a data center; it's creating a new, integrated 'power-and-telecom' ecosystem to fuel its future in AI.
- ESS (Energy Storage System): A system, typically using large batteries, that stores electrical energy to be used at a later time. It helps stabilize the power grid and provides backup power.
- Vertical Integration: A strategy where a company owns or controls its suppliers or distributors to control its value chain. In this case, SoftBank is becoming its own battery supplier.
- Watt-Bit Collaboration: A Japanese policy concept encouraging the coordinated development of power infrastructure (measured in Watts) and communication/data infrastructure (measured in bits).