QS Energy : XBRL 2021

Annual report pursuant to Section 13 and 15(d)

Cover

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