Waymo robotaxi batteries repurposed for power grid storage

🔑 Enhanced Key Takeaways

•Waymo has partnered with B2U Storage Solutions, a California-based battery repurposing company, to implement this initiative, which has been in development for several years.
•The batteries being repurposed are specifically from Waymo's Jaguar I-PACE fleet, which are swapped out sooner than average EV batteries due to high utilization in robotaxi operations.
•Waymo's centrally managed autonomous fleet provides consistent battery types and detailed performance data, offering a significant advantage for repurposing partners like B2U in optimizing second-life applications.
•B2U's energy storage systems, which house up to 54 EV battery packs in shipping container-sized cabinets, currently have 4,000 batteries in the field, including those from other manufacturers like Nissan Leaf, Honda, and General Motors.
•The repurposing process extends the functional life of these lithium-ion batteries by several years, enabling them to store excess renewable energy during low demand and dispatch it during peak usage times, thereby providing crucial stability to the power grid.

📊 Competitor Analysis▸ Show

Competitor Analysis: Second-Life EV Battery Storage

Feature/Company	Waymo (with B2U Storage Solutions)	Redwood Materials (with Rivian)	Ford (New Business Line)	RePurpose Energy
Primary Source of Batteries	Retired Waymo robotaxi (Jaguar I-PACE) batteries	Rivian's second-life battery packs	Existing US battery manufacturing capacity, likely Ford's own EV batteries	Used EV batteries (e.g., Nissan USA)
Application Focus	Grid-tied energy storage systems in California and Texas	Grid-scale energy storage, AI data centers, utility storage, on-site industrial power	Battery energy storage systems for data centers and electric grid	Reliable, low-cost second-life energy storage systems
Scale/Capacity (Known)	Thousands of retired vehicles transitioning to power sector; B2U has 4,000 batteries in field	10 MWh dispatchable energy at Rivian's Illinois facility (from 100+ packs)	Repurposing existing manufacturing capacity	Delivered first commercial unit to Nissan USA in 2024
Key Differentiator	Consistent battery types and detailed performance data from centrally managed robotaxi fleet	Focus on large-scale industrial and utility applications, strong recycling background	Leveraging internal manufacturing capabilities for new business	Founded by UC Davis engineers, secured significant non-dilutive grants, AI for battery health
Partnerships	B2U Storage Solutions	Rivian	N/A (internal initiative)	Nissan USA
Geographic Focus	California, Texas	Primarily US (e.g., Illinois)	US (repurposing US manufacturing capacity)	Global (delivered to Nissan USA)

🛠️ Technical Deep Dive

The repurposed batteries are lithium-ion.
B2U's energy storage systems are designed to house up to 54 EV battery packs within shipping container-sized cabinets.
Waymo's newer generation robotaxis, such as the Zeekr RT, utilize a 93 kWh lithium-ion battery pack with an advanced 800V electrical architecture for fast charging.
The Zeekr RT's electrical system includes a high voltage (HV) battery pack located along the bottom of the vehicle, an electronic power inverter for the single Drive Unit, and two independent 12V buses that power both autonomous driving system (ADS) components and base vehicle components.

🔮 Future ImplicationsAI analysis grounded in cited sources

The initiative will accelerate the development of a circular economy for autonomous vehicle components.

By extending the useful life of high-value battery packs, Waymo and B2U are establishing a viable model for reusing AV hardware, reducing waste and maximizing resource utilization.

This partnership will contribute to increased grid stability and renewable energy integration in California and Texas.

Repurposed batteries can store excess renewable energy and dispatch it during peak demand, helping to balance the grid and reduce reliance on fossil fuel peaker plants.

The consistent data from Waymo's fleet will provide valuable insights for optimizing second-life battery performance.

High utilization and close monitoring of Waymo's batteries throughout their first life offer unique data sets that can inform better management and predictive maintenance for their second life in grid storage.

⏳ Timeline

2009-01

Google's self-driving car project began, which later became Waymo.

2016-12

Google's self-driving car project was officially renamed Waymo and spun out as a subsidiary of Alphabet Inc.

2017-10

Waymo began testing fully autonomous minivans without safety drivers on public roads in Chandler, Arizona.

2019-11

Waymo One launched as the first autonomous service worldwide to operate without safety drivers, starting with a 'trusted tester' rollout in San Francisco.

2020-10

Waymo became the first company to offer fully autonomous ride-hailing service to the public without safety drivers in Phoenix, Arizona.

2024-03

The California Public Utilities Commission (CPUC) approved Waymo's expansion for paid robotaxi rides on freeways in significant urban areas of California.

2026-06

Waymo announced its partnership with B2U Storage Solutions to repurpose retired robotaxi batteries for power grid energy storage in California and Texas.