DayOne's Selangor MOU books 1.5GW of power before the campus breaks ground

DayOne, the APAC-focused developer spun out of GDS in 2025, has signed a non-binding memorandum of understanding with TNB Power Generation, a subsidiary of Malaysian utility TNB, to explore up to 1.5GW of on-site generation and battery storage for its planned Selangor campus. The final capacity, configuration, and implementation model remain subject to feasibility assessments, definitive agreements, and regulatory approvals, which makes the document a reservation more than a power plant.

DayOne agreed last month to acquire 78.8 acres from Malaysian developer Mah Sing, with closing expected in the second half of 2027, so the campus remains early-stage. The power conversation with the same utility is already deep into its second and third rounds.

The relationship includes a 500MW solar agreement for DayOne's two existing Malaysian data centers — Nusajaya Tech Park in Gelang Patah and Kempas Tech Park in Johor Bahru, which together hold 120MW of capacity — and a June deal for 1.5GW of solar and 2.2GWh of battery storage. The new MOU extends that pattern from off-site supply to on-site generation and storage, the piece that changes the risk profile.

Jamie Khoo, DayOne's CEO, described the model as combining on-site power generation and a battery energy storage system directly with data center infrastructure, adding new capacity and 'enhancing system flexibility' while contributing to Malaysia's energy resilience. The language is standard project-developer fare; the sequence is what gives it meaning.

For a campus that has not been built, this is the correct order of operations. The binding constraint on Malaysian data center development has shifted from land and capital to firm power and the grid capacity to deliver it. DayOne is securing both at the source before the land deal has closed.

The MOU is non-binding, so it does not yet add a watt to the grid. But the option itself carries value, because interconnection capacity and generation rights are now the scarce assets in the data center buildout. Grid access trades like scarce capacity; every permit, queue position, and utility relationship banks like land. DayOne is managing the Selangor project as a power-rights play with a data center attached.

The scale would be substantial against DayOne's existing footprint: more than 500MW in service and under construction and more than 500MW held for future development across Hong Kong, Singapore, Malaysia's Johor, Indonesia's Batam, and Tokyo. A 1.5GW on-site energy solution would be a major addition to a Malaysian position that already includes the June solar and storage deal and a 500MW solar agreement.

DayOne is also willing to bet on the opposite end of the infrastructure spectrum. In August the company switched on Singapore's first biological data center prototype, a sign that it will take risk on experimental compute as well as firm power. The through-line is the same: secure the input that everyone else assumes will be there.

The developers still treating power as a utility bill rather than a development asset will be left waiting for capacity. DayOne has claimed the scarcer input — a seat in the grid queue — before the first pile is driven.