From Sovereign Funds to Bagel Shops: Battery Storage Lost Its Size Constraint

Norway’s Government Pension Fund Global, the $2.2 trillion sovereign wealth fund built on oil revenue, announced this week that it is actively pursuing its first battery storage investments. Harald von Heyden, head of energy and infrastructure at Norges Bank Investment Management, told an energy conference in Oslo that the fund is “really looking for that company in the battery space,” according to ESS News. The fund requires a minimum investment of $1.2 billion per deal and caps its stake at 50%.

On the same day, in Bushwick, Brooklyn, a bagel shop is running batteries the size of carry-on suitcases behind its ovens.

The floor and the ceiling. The Norwegian fund has invested in unlisted renewables since 2019, deploying roughly $8 billion of a $38 billion renewable energy allocation, mostly into offshore wind. Battery storage was previously too small. Von Heyden explained the shift simply: battery projects are “going even bigger and bigger,” finally meeting the fund’s scale threshold. After a 15.1% return in 2025 ($160 billion in gains), the fund is looking for new infrastructure categories that match its multi-decade investment horizon.

At the other end of the spectrum, David Energy, a New York City retail energy provider, has signed deals to place plug-in batteries at roughly 50 small business locations since mid-January, totaling over 500 kilowatt-hours of storage capacity. The customers are fast-food restaurants, day spas, dog grooming stores, and Black Seed Bagels, a ten-location chain whose co-owner Noah Bernamoff told Grist, “We are in the game of nickels and dimes. So we are always happy to save the money.”

How a plug-in battery saves money. New York City commercial electricity bills include demand charges calculated on the highest 15-minute power draw in a given month. One bad quarter-hour with the oven, refrigeration, and HVAC all running simultaneously can inflate a bill for 30 days. Demand charges account for 15% to 50% of a typical NYC commercial customer’s monthly bill, depending on the business and rate class.

David Energy’s approach is simple. Portable battery units plug into standard wall outlets. At Black Seed Bagels, the units are 2.8 kWh each; configurations at other locations may vary. The company’s software platform monitors grid conditions and shifts loads to battery power during peak demand windows. No hardwired installation. No utility interconnection process. No permitting headaches. CEO James McGinniss estimated that shaving one kilowatt from a customer’s peak demand saves roughly $50 per month. Black Seed Bagels projects savings of $80 per location per month, about $10,000 annually across its ten shops.

The batteries are free to the business owner. David Energy recoups costs through demand response program participation with Con Edison and NYISO, wholesale energy market arbitrage, and the margin between wholesale procurement and retail billing.

The plug-in distinction. New York City’s Fire Department has maintained strict lithium-ion installation regulations that have complicated hardwired battery projects. Because David Energy’s units connect through standard outlets rather than building electrical systems, they may sidestep parts of the permitting and inspection process that applies to larger, hardwired installations. The regulatory treatment of plug-in commercial batteries at scale remains an open question, but the model is operational now.

The institutional signal. Norway’s fund is not a venture capital investor chasing early-stage bets. It is an asset allocator managing national oil wealth across generational time horizons, with positions in over 8,500 companies across 63 countries. When Norges Bank Investment Management says it wants battery storage exposure, it is saying the asset class has crossed a threshold of project scale, revenue predictability, and counterparty quality that meets sovereign-grade due diligence.

That signal arrives alongside parallel data points. Compass Datacenters secured the first-ever AAA credit rating from Moody’s for a data center asset-backed securitization this month, with $500 million of an $830 million deal earning the top grade. Battery storage and data center infrastructure are converging in the same credit quality conversation. Goldman Sachs reports U.S. electricity prices rose 6.9% in 2025, more than double the 2.9% headline inflation rate, with data centers accounting for 40% of electricity demand growth. Both investments appear driven by a shared dynamic: electricity costs are rising, and the entities paying those bills want more control over when and how they consume power.

The shift. Five years ago, battery storage occupied a narrow band of the capital stack. Too small for institutional allocators. Too expensive for small businesses. Too risky for conservative credit markets. The technology worked, but the financial infrastructure around it had not matured.

In February 2026, the Norwegian sovereign wealth fund is sizing billion-dollar battery deals. A Brooklyn energy company is deploying free batteries in bagel shops and turning a profit on arbitrage. Moody’s is stamping AAA on data center securitizations backed by the same power infrastructure dynamics. BloombergNEF projects 123 GW of global storage deployment this year, up 33% from 2025.

Battery storage now has a use case, a financing structure, and a customer at every order of magnitude, from a few kilowatt-hours behind a commercial oven to multi-gigawatt-hour portfolios sized for the world’s largest asset owner. The technology that was too small for sovereign funds and too expensive for small business found a way to be neither, simultaneously.

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