Annual report pursuant to Section 13 and 15(d)


Cover - USD ($)
12 Months Ended
Dec. 31, 2021
Mar. 25, 2022
Cover [Abstract]    
Document Type 10-K  
Amendment Flag false  
Document Annual Report true  
Document Transition Report false  
Document Period End Date Dec. 31, 2021  
Document Fiscal Period Focus FY  
Document Fiscal Year Focus 2021  
Current Fiscal Year End Date --12-31  
Entity File Number 0-29185  
Entity Registrant Name QS ENERGY, INC.  
Entity Central Index Key 0001103795  
Entity Tax Identification Number 52-2088326  
Entity Incorporation, State or Country Code NV  
Entity Address, Address Line One 3606 Challenger Way  
Entity Address, Address Line Two Unit#1  
Entity Address, City or Town Carson City  
Entity Address, State or Province NV  
Entity Address, Postal Zip Code 89706  
City Area Code (775)  
Local Phone Number 300-7647  
Entity Well-known Seasoned Issuer No  
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  
Entity Shell Company false  
Entity Public Float $ 12,784,000  
Entity Common Stock, Shares Outstanding   356,491,888
Auditor Firm ID 572  
Auditor Name Weinberg & Company, P.A.  
Auditor Location Los Angeles, California