🔍 Read the full analysis: AI’s Growing Power Needs Are Changing Data Centers And Electrical Work on ThorstenMeyerAI.com
Prime made for students and young adults
- Fast, free delivery for dorm and study essentials
- Prime Video and Amazon Music included
- Member-only deals
TL;DR
Two October developments highlight how AI data-center growth is putting greater emphasis on electricity infrastructure: Vantage reserved more than a gigawatt of factory capacity for a solid-state transformer, and NiSource signed a 20-year power deal with Microsoft that includes new generation and a large battery. The deals do not establish how quickly the wider grid can keep up or how new power costs will be shared.
Data-center power infrastructure moved into focus this month as operator Vantage reserved more than a gigawatt of factory capacity for a solid-state transformer and utility NiSource signed a 20-year power agreement with Microsoft that adds about 1,100 megawatts of generation and a 600-megawatt battery. The developments show how rising AI electricity demand is prompting investment in power conversion and storage, though they do not resolve broader questions about grid access, project delivery or who ultimately pays for new infrastructure.
Vantage’s October 21 reservation is for factory capacity for a solid-state transformer made by Heron Power, according to the source report. The system is designed to convert grid power into 800-volt direct current and includes storage intended to help manage fluctuating data-center loads. A reservation of manufacturing capacity is not the same as confirmation that the equipment has been delivered or installed.
Five days earlier, NiSource signed the long-term agreement with Microsoft. The deal adds about 1,100 megawatts of generation and a 600-megawatt battery, according to the source. It is a specific supply arrangement, not evidence that all planned data centers can obtain power on similar terms. The source does not specify the generation technology, construction schedule or the allocation of costs among the parties and utility customers.
The power-design discussion is also accelerating. NVIDIA’s reference design proposes converting 13.8-kilovolt grid power to 800-volt DC near a facility and distributing it to high-demand racks. NVIDIA says the approach could reduce copper use by 45% and improve end-to-end efficiency by up to 5% compared with current 54-volt systems. These are vendor claims, not independent measurements. The company has said full-scale production is planned alongside its Kyber systems in 2027.
Infographic 01 · From grid to rack
AI racks near a megawatt are outgrowing the AC power chain.
Why the industry is moving to 800-volt direct current: fewer conversions, less copper, batteries on the main path. The numbers are vendor figures with different baselines, so they cannot be added up.
Today: many conversions
Typical AC chain from the grid to the rack
- Medium-voltage AC from the grid
- Transformer steps it down to low-voltage AC
- UPS converts to DC for the batteries and back to AC
- Distribution units feed the racks
- Every server power supply converts AC to DC again
Each stage loses energy, and almost all of the loss becomes heat the cooling system must remove.
800 V DC: convert once, outside
NVIDIA reference design, full-scale production planned with Kyber racks in 2027
- 13.8 kV AC from the grid
- Converted once to 800 V DC at the edge of the site, batteries on the same DC bus
- 800 V DC busway to the racks
- Stepped down inside the rack, for 1 MW racks and beyond
Bridge for existing halls: a “sidecar” cabinet next to the rack converts AC to 800 V DC, while the old chain stays in place.
Power lost per MW delivered to the rack
kW, SMA white-paper model vendor model
What NVIDIA says 800 V DC changes
NVIDIA’s engineering claims claim
Sources: NVIDIA technical blog (20 May 2025, updated 31 Jul 2025); SMA America, sponsored content in Utility Dive (26 Oct 2026). Rack density: IEA, Key Questions on Energy and AI (Apr 2026) (AI server power density 11× from 2020 to 2025, a further 4× by 2027).
Powered by Thorsten Meyer AI
Power Is Becoming a Data-Center Constraint
AI facilities need more than chips and buildings: they also need large, reliable electrical connections, power equipment and cooling. The International Energy Agency says data-center electricity use is expected to rise from 485 terawatt-hours in 2025 to 950 terawatt-hours in 2030, roughly doubling over that period. Its April 2026 report also says AI-server power density rose 11-fold from 2020 to 2025 and is projected to quadruple again by 2027.
That growth can change planning for operators and utilities. Higher rack loads make copper, transformers, batteries and grid connections more consequential, while infrastructure may take years to procure or build. The IEA estimates transformers can take two to three years to arrive and grid connections five to ten years in many places. Those delays mean access to power can shape where projects proceed and when they become operational.
Electricity costs are relevant to households, but the connection between data-center demand and any particular customer’s bill is not automatic. The source reports average U.S. residential electricity prices of 18.21 cents per kilowatt-hour in 2026, compared with 17.30 cents in 2025, and a 41% rise in wholesale prices in the PJM region. Those figures alone do not establish that data centers caused the increases. The cost effects depend on local markets, infrastructure decisions and how utilities and regulators allocate expenses.
Popular right now
Philips 3300 Series Fully Automatic Espresso Machine with LatteGo Milk System
Bose QuietComfort Wireless Bluetooth Headphones with Active Noise Cancellation, Mic, USB‑C Charging, Deep Bass, 24‑Hour Battery – White Smok
Samsung 48-Inch S90H OLED 4K Smart TV (2026)
As an affiliate, we earn on qualifying purchases.
From AC Distribution to 800-Volt DC
Data centers have traditionally received alternating-current electricity and converted it through several stages before servers use low-voltage direct current. Each conversion loses some energy, most of which becomes heat that cooling systems must remove. The established arrangement can be harder to scale as racks move from loads of tens of kilowatts toward much higher power levels.
NVIDIA’s technical material says a one-megawatt rack supplied at 54 volts could require up to 200 kilograms of copper busbar. Its proposed 800-volt architecture would move conversion closer to the facility’s electrical perimeter. The precise savings depend on design and operating conditions; NVIDIA’s projected copper, efficiency and maintenance reductions should not be treated as independently verified results.
A Utility Dive article published October 26 makes a related case for direct-current distribution, but it is sponsored content by SMA America, an inverter maker. SMA’s white-paper model estimates losses of about 80 kilowatts when delivering one megawatt through a traditional AC chain, compared with about 20 kilowatts in a design that converts to 800-volt DC outside the building. Those are modeled figures from the vendor, not a reported field comparison. SMA also describes a “sidecar” conversion cabinet as a way to use 800-volt racks in existing AC halls without replacing every part of their electrical systems.
Batteries are part of the same shift because they store direct-current power and can respond to rapid changes in demand. The IEA says data centers could have 20 to 25 gigawatts of battery capacity by 2030, and says storage could support the grid if incentives are in place. That is a forecast, not a confirmed installation total.
“A 1 MW rack at 54 V could require up to 200 kg of copper busbar.”
— NVIDIA, in its 800 VDC technical material
Delivery, Costs and Savings Remain Open
The reported agreements and plans do not show how much new equipment is already operating. Vantage’s factory-capacity reservation does not confirm delivery, installation or performance at a live data center. The source also does not provide a timetable for the generation and battery capacity in the NiSource-Microsoft deal, or explain how its costs will be divided.
The benefits attributed to 800-volt DC systems are not yet established by independent operating data in the source material. NVIDIA’s projected reductions and SMA’s modeled conversion losses come from companies promoting or supplying the technology. Actual outcomes may vary with facility design, equipment, workload and operating conditions. It is also unclear how quickly existing data centers could adopt the systems or how much electrical infrastructure would need replacement.
Grid constraints and electricity bills remain local questions. The source cites a large U.S. interconnection queue and long connection timelines, but those figures do not determine whether an individual project will be approved or built. Nor do national and regional price statistics identify how much of any change is attributable to data-center demand.
Watch for Builds and Grid Decisions
The next evidence will come from project milestones: whether Vantage’s reserved transformer capacity becomes delivered equipment, when the NiSource-backed generation and battery are built, and whether the projects enter service on their expected schedules. The source does not give dates for those steps.
For the 800-volt approach, planned Kyber production in 2027 is a stated milestone from NVIDIA. Independent measurements from operating systems would help establish whether the company’s projected efficiency and copper savings are achieved in practice. Utility and regulatory decisions will also shape how quickly sites gain connections and who bears the cost of added generation, storage and wires.
Key Questions
What are the two power developments reported this month?
Vantage reserved more than a gigawatt of factory capacity for a Heron Power solid-state transformer. NiSource signed a 20-year agreement with Microsoft that includes about 1,100 megawatts of generation and a 600-megawatt battery.
Why are data centers considering 800-volt DC power?
High-power AI racks increase the amount of electricity that must be delivered through a facility. Direct-current designs aim to reduce conversion stages and the copper needed to distribute power, but projected savings cited here come from vendors and have not been independently verified in the source material.
Are the claimed efficiency and copper savings proven?
No independent measurements are provided in the source. NVIDIA’s savings figures are company claims, while SMA’s loss comparison is based on a vendor white-paper model.
Will data-center growth raise household electricity bills?
The source reports rising residential and wholesale electricity prices, but those figures do not establish that data centers caused the increases. The effect on bills depends on local power markets and decisions about how infrastructure costs are allocated.
When will these systems be operating?
The source gives no confirmed operating date for the Vantage transformer reservation or the generation and battery in the NiSource-Microsoft agreement. NVIDIA has said full-scale production of its planned 800-volt system is intended with Kyber systems in 2027.
Source: ThorstenMeyerAI.com
