v3.26.1
Long-Term Debt - DOE Loan (Details)
$ in Thousands
6 Months Ended 12 Months Ended
Dec. 12, 2024
stall
Jun. 30, 2026
USD ($)
Dec. 31, 2025
USD ($)
Long-Term Debt      
Outstanding balance   $ 293,670 $ 204,316
DOE Loan | EVgo Swift Borrower LLC | Federal Financing Bank | Financial Guarantee      
Long-Term Debt      
Maximum percentage of proceeds to be used for reimbursement of certain costs (as a percent) 80.00%    
Project leverage ratio cap (as a percent) 65.00%    
Number of stalls installed given as collateral to debt | stall 1,594    
Debt instrument risk charge (as a percent) 1.20%    
Outstanding balance   226,100 140,600
Paid-in-kind interest   10,300 5,600
Unused borrowing capacity amount   $ 409,000 $ 919,300
Weighted average interest rate (as a percent)   5.63%