HomeFull speed ahead. Keep track of advancements in every frontier

TheTechno Optimist.

Redwood Materials—Recycling and materials campusRedwood Materials—Recycling and materials campusRedwood Materials—Redwood EnergyRedwood Materials—Redwood EnergyRedwood Materials—Redwood Materials—Redwood EnergyRedwood Materials—Recycling and materials campusRedwood Materials—
Redwood Energy
Courtesy of Redwood Materials · Press kit, editorial use (opens redwoodmaterials.com)

Redwood Energy

by Redwood MaterialsUS

PilotStage 3 of 5

First 63 MWh system running for Crusoe; 100+ MW projects in design.

Updated 14 Apr 2026Checked 25 Sep0 updates this week

Milestones

Next · 5+ GWh of packs in pipeline
  1. Launch with Crusoe microgrid (12 MW / 63 MWh)26 Jun 2025Complete.
  2. 5+ GWh of packs in pipelineNowCurrent milestone.
  3. 20 GWh of storage deployedTarget 2028Not yet reached.

Most important updates

  • 14 Apr 2026
  • 25 Mar 2026
  • 24 Mar 2026
  • 16 Jul 2025
  • 26 Jun 2025

Upcoming

  1. 202820 GWh of storage deployed (next)

Current obstacles

  • Safety certificationStorage built from mixed used packs must pass fire codes written for new, identical batteries.

Physics limits

  • Every pack has aged differentlyUsed packs vary in capacity and internal resistance; the weakest cells limit a string, so systems must be derated and closely monitored.
  • Old cells can fade suddenlyLithium-ion cells often age slowly, then hit a 'knee' where fade accelerates (e.g. lithium plating), so a used pack's remaining life is hard to predict.

How it works

3 parts
Rows of used EV battery packs feeding Crusoe's modular data centres at Redwood's Nevada microgrid, seen from above
Rows of used EV battery packs feeding Crusoe's modular data centres at Redwood's Nevada microgrid, seen from aboveCourtesy of Redwood Materials · Press kit, editorial use (opens redwoodmaterials.com)
Second life

Old EV packs keep working

EV packs retired with most of their capacity left are tested and reused as they are, without taking them apart.

Controls

Electronics tame mixed packs

Redwood's own power electronics and software run packs of different makes, ages and chemistries as one system.

Use

Storage for data centres

Systems charge from solar and discharge on demand; the first, with Crusoe in Nevada, is 12 MW / 63 MWh powering AI servers.

Spec sheet

SpecRedwood Energy
First system12 MW / 63 MWhR (reported)

R reported by the company

Update log

5 updates

Tue 14 Apr

  • Minor: PressCommercial

Wed 25 Mar

  • Minor: PressTest

Tue 24 Mar

  • Major: PressCommercial

Wed 16 Jul 2025

  • Major: PressPartnership

Thu 26 Jun 2025

  • Major: BlogCommercial

About Redwood Materials

The team behind Redwood Energy

Redwood Materials

Battery recycling, battery materials, second-life storage

Redwood Materials (founded 2017 by ex-Tesla CTO JB Straubel) recycles old batteries and factory scrap into battery materials in Nevada. Since 2025, its Redwood Energy unit reuses old EV packs as grid storage.

  • Takes in 20+ GWh of used batteries a year, which it says is about 90% of North American lithium-ion recycling.
  • Redwood Energy (June 2025) reuses still-good EV packs as storage; first system: a 12 MW / 63 MWh microgrid for Crusoe's AI data centre.
  • Series E closed at $425M in January 2026, valuing it above $6B (Eclipse led, Google joined); ~5% of staff cut in late 2025.

redwoodmaterials.com (opens redwoodmaterials.com)Company profile →

Founded
20179 yrs
Headquarters
United States
Status
Private
Valuation
$6BprivateJan 2026
Raised
$1.4B3 rounds
Last round
Series E final close · $75MJan 2026$6B post
Works in
MaterialsBattery recyclingEnergy
Coverage
2 programs · 15 updateslatest 9 Jun 2026checked 25 Sep
Lead investors
EclipseGoldman Sachs Asset Management
Customers
CrusoePanasonic Energy (opens redwoodmaterials.com)
Investors
Eclipse (opens redwoodmaterials.com)Google (opens redwoodmaterials.com)
People
JB Straubel (opens en.wikipedia.org)Founder & CEO
Primer