XML 21 R1.htm IDEA: XBRL DOCUMENT v3.25.4
Document and Entity Information - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Feb. 23, 2026
Jun. 30, 2025
Document Type 10-K      
Document Annual Report true      
Document Period End Date Dec. 31, 2025      
Document Transition Report false      
Securities Act File Number 001-40284      
Entity Registrant Name SOLID POWER, INC.      
Entity Incorporation, State or Country Code DE      
Entity Tax Identification Number 86-1888095      
Entity Address, Address Line One 486 S. Pierce Ave., Suite E      
Entity Address, City or Town Louisville      
Entity Address, State or Province CO      
Entity Address, Postal Zip Code 80027      
City Area Code 303      
Local Phone Number 219-0720      
Entity Well-known Seasoned Issuer Yes      
Entity Voluntary Filers No      
Entity Current Reporting Status Yes      
Entity Interactive Data Current Yes      
Entity Filer Category Non-accelerated Filer      
Entity Small Business true      
Entity Emerging Growth Company false      
Document Financial Statement Error Correction [Flag] false      
Entity Shell Company false      
Entity Public Float       $ 367.6
Entity Common Stock, Shares Outstanding     220,578,327  
Documents Incorporated by Reference [Text Block]

Portions of the Registrant’s definitive proxy statement relating to its 2026 annual meeting of stockholders (the “2026 Proxy Statement”) are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. The 2026 Proxy Statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this report relates.

      
Entity Central Index Key 0001844862      
Current Fiscal Year End Date --12-31      
Document Fiscal Year Focus 2025      
Document Fiscal Period Focus FY      
Amendment Flag false      
ICFR Auditor Attestation Flag false      
Auditor Name Deloitte & Touche LLP Ernst & Young LLP    
Auditor Firm ID 34 42    
Auditor Location Denver, CO Denver, CO    
Common stock        
Title of 12(b) Security Common stock, par value $0.0001 per share      
Trading Symbol SLDP      
Security Exchange Name NASDAQ      
Warrants, each whole warrant exercisable for one share of common stock at an exercise price of $11.50        
Title of 12(b) Security Warrants, each whole warrant exercisablefor one share of common stock at an      
Trading Symbol SLDPW      
Security Exchange Name NASDAQ