Solid Power Begins Commissioning MOBIUS Continuous Electrolyte Line

Solid Power, Inc. (SLDP ) announced on October 26, 2026, that it has begun commissioning MOBIUS, its continuous manufacturing pilot line for sulfide-based solid electrolyte, at its SP2 facility in Thornton, Colorado. The line, previously referred to as the SP2.5 Continuous Manufacturing Pilot Line, has reached substantial completion of construction, and materials are now being introduced into the line. MOBIUS is designed to add 45 metric tons of solid electrolyte production capacity per year.

President and Chief Executive Officer John Van Scoter called bringing MOBIUS to fruition “a critical step in positioning Solid Power for commercial readiness and long-term stockholder value creation.” He said the line’s name reflects continuous production designed to deliver the process control, repeatability, and scale the company’s partners expect from a commercial electrolyte supplier.

Following commissioning, total electrolyte production capacity at the SP2 facility is expected to reach approximately 75 metric tons per year, and Van Scoter said the company expects the line to increase electrolyte production capacity at SP2 by 150%. MOBIUS will operate alongside the facility’s existing batch production lines, using what Solid Power believes is the world’s first continuous manufacturing process for sulfide-based solid electrolyte. The company said it believes continuous manufacturing is fundamental to achieving the volume, consistency, and cost required for commercial electrolyte supply, and it expects continuous production to deliver tighter process control and more consistent output than batch processing.

The line supports Solid Power’s stated objective to manufacture and sell electrolyte to Tier 1 battery manufacturers and automotive original equipment manufacturers. It will also support material qualification with automotive and cell manufacturing partners as the company advances toward commercial electrolyte supply. Solid Power describes its business model as selling its electrolyte to cell manufacturers and licensing its cell designs and manufacturing processes, an approach it says distinguishes it from competitors that plan to be commercial battery manufacturers.

Testing Status and Startup Timeline

Solid Power has completed site acceptance testing for primary powder processing on MOBIUS and expects to complete full SAT by the end of October 2026. The company describes SAT as an activity performed by Solid Power and the equipment manufacturer in parallel to confirm that the equipment works as specified and designed before progressing into production. With commissioning underway, plant validation and operational startup remain planned for the fourth quarter of 2026.

That timeline matches the schedule Solid Power laid out in its second-quarter 2026 report, released August 4, 2026. In that report, the company said installation of major equipment was advancing in preparation for equipment acceptance testing targeted for completion in the third quarter, with plant validation and operational startup planned for the fourth quarter. Second-quarter 2026 capital expenditures totaled $6.3 million, primarily representing construction costs for the continuous electrolyte production pilot line, the company reported.

DOE Funding and Capacity Roadmap

MOBIUS was built as part of a project supported by the U.S. Department of Energy through an assistance agreement providing up to $50 million in federal funding. On September 20, 2024, Solid Power announced it had been selected by the DOE’s Office of Manufacturing and Energy Supply Chains to begin award negotiations for up to $50 million under the Bipartisan Infrastructure Law. At the time of that selection, the company had the capability to produce 30 metric tons of electrolyte per year, and it laid out plans to increase annual production capacity first to 75 metric tons in 2026 and then to 140 metric tons in 2028.

The 2024 announcement said Solid Power expected the continuous manufacturing process to allow it to produce electrolyte at a significantly lower cost compared with the process it was using at the time. The company also said it expected to hire up to 40 full-time employees for manufacturing operations at the Thornton facility over the course of the project, and that its contractors and subcontractors expected to employ union labor for up to 100 construction positions. Van Scoter said at the time that the company viewed the DOE selection as validation of the promise sulfide-based all-solid-state batteries hold.

In its second-quarter 2026 report, Solid Power reported total liquidity of $419.3 million as of June 30, 2026, and said it continued to have no debt financing. The company said it improved its electrolyte performance through work under its Joint Evaluation Agreement with Samsung SDI and BMW, and that it advanced discussions with industry partners regarding a potential joint venture for commercial-scale electrolyte production in the Republic of Korea. It also completed its Line Installation Agreement with SK On, receiving the associated milestone payment, and said it remained in negotiations for a new collaboration agreement. The company said it remained on track to deliver cash investments within its 2026 guidance range of $85 million to $100 million.