GM to Equip Over 250,000 EVs with V2G Capability, Also Announces Sodium-Ion Batteries
GM begins distributing V2G-compatible firmware to over 250,000 EVs. Also announces grid-scale sodium-ion batteries, accelerating distributed power grid vision to address AI-driven electricity demand.
U.S. General Motors (GM) has begun providing a firmware update enabling Vehicle-to-Grid (V2G) power supply from vehicles to the power grid for over 250,000 EVs operating in the United States. At the same time, it also disclosed the development status of sodium-ion batteries for grid-scale storage. The Washington Post editorial described it as “battery innovations ease AI power demand,” while Fortune reported GM’s strategy as a “transformation into a distributed utility.”
Power Grid Strain and Surging AI Demand
The U.S. power grid is facing aging infrastructure, extreme weather, and increasing demand from a surge in AI-related data centers. According to Fortune, the large-scale deployment of AI is quietly reshaping U.S. electricity demand. GM sees this crisis as a business opportunity and has unveiled a strategy to position itself as a “distributed utility.”
In an open letter, GM Energy head Wade Sheffer described EVs parked in U.S. driveways as “a massive opportunity to aggregate energy storage capacity.” He pointed out the current situation where vast amounts of battery resources remain disconnected from the grid every night.
Technical Details of V2G Support
The first pillar of GM’s V2G strategy is its existing vehicle fleet. The company states that over 250,000 EVs are already capable of bidirectional charging, which refers to the ability to not only draw power from the grid but also send power back to the grid.
The firmware update being rolled out is targeted at customers equipped with GM Energy’s Vehicle-to-Home (V2H) hardware. With the update, home backup systems can be utilized as grid resources without adding new hardware.
GM has started a pilot program with DTE Energy in Michigan, involving 30 employee homes. Additionally, it shares a vision with Pacific Gas & Electric (PG&E) in California through 2030, aiming for over 52,000 of the region’s approximately 130,000 EVs to contribute to grid stabilization. According to CNBC, GM is seeking partnerships with power companies nationwide, positioning this as a response to rising energy costs from the AI boom.
Shift to Sodium-Ion Batteries
The second pillar is a new battery technology for grid storage. GM’s battery chief and former Tesla employee Kurt Kelty emphasized the advantages of sodium-ion batteries as a next-generation alternative to lithium iron phosphate (LFP) at a briefing in San Francisco.
The biggest advantage of sodium-ion batteries is that they do not require additional cooling systems, which reduces system costs compared to LFP batteries. Additionally, they have a practical lifespan of 20 years and the key materials can be sourced within the U.S., which is strategically important. Kelty stated, “Sodium-ion is a suitable chemistry for grid storage. GM’s version of sodium-ion is particularly good,” noting that good results have been achieved even at high temperatures of 55°C.
According to Forbes, GM aims to leapfrog the market currently dominated by China in LFP batteries using sodium-ion technology. The background is that material costs are lower than LFP and geopolitical risks in the supply chain can be reduced.
Competition with Ford Energy
GM’s move sets up competition with Ford’s newly launched Ford Energy division. The two Detroit auto giants are competing to redirect unused EV capacity to the more pressing issue of stable power supply in the AI era.
GM aims to build a “virtual power plant” combining hundreds of battery-equipped vehicles, grid-scale storage facilities, and a unified charging platform, rather than just being an automaker. Ford Energy also has a similar vision, and the two companies’ strategies will directly clash in the power market.
Editorial Opinion
In the short term, this V2G firmware update can be evaluated as providing important distributed energy resource (DER) options for U.S. grid operators. If pilot programs with DTE Energy and PG&E succeed, full-scale commercial contracts with power companies in other states could be established by 2027. If a model where automakers directly contract with power utilities is established, it could bring changes to the business structure of the power industry.
From a long-term perspective, attention is on whether GM’s sodium-ion battery strategy can contribute to reducing dependence on China in the LFP market. The 20-year lifespan and high-temperature resistance are characteristics suitable for grid storage. If GM gains experience in this field, it could promote restructuring of the grid-scale battery supply chain in North America. However, whether mass production costs reach the same level as LFP remains unknown, and the speed of demonstration and mass production will determine competitiveness.
What the editorial board wants to question is whether V2G can provide sufficient economic incentives to users. With battery degradation, the motivation for EV owners to accept daily charge/discharge cycles is not clear at this point. How GM and Ford design revenue-sharing models with power companies will be key to the feasibility of this concept.
References
- GM Updates 250,000 EVs with Vehicle-to-Grid Firmware - Slashdot — Published 2026-06-13
Frequently Asked Questions
- What is V2G? How is it different from V2H for home use?
- V2G (Vehicle-to-Grid) is a technology that supplies EV battery power back to the power grid. V2H (Vehicle-to-Home) is limited to home power usage, while V2G is directly used by power companies for supply-demand adjustment. GM's current update corresponds to a functional expansion from V2H to V2G.
- Are sodium-ion batteries better than lithium-ion batteries?
- Advantages vary by application. Sodium-ion batteries have lower energy density than lithium-ion, but feature lower material costs, no need for cooling systems, and a long lifespan of 20 years. GM considers them suitable for grid storage and positions them as an alternative to LFP.
- Can GM's V2G service be used in Japan?
- Currently, deployment in the U.S. has been announced, with availability in Japan undecided. GM sells EVs in Japan on a limited basis, but expanding V2G services would require agreements with local power companies and regulatory responses, so the timeline is unclear.
Comments