EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Energy Focus, Inc.

Solon, Ohio

We hereby consent to the incorporation by reference in the Prospectus constituting a part of this Registration Statement of our report dated March 24, 2020, relating to the consolidated financial statements and financial statement schedule of Energy Focus, Inc., appearing in the Company’s Annual Report on Form 10-K for the year ended December 31, 2019. Our report contains an explanatory paragraph regarding the Company’s ability to continue as a going concern.

/s/ GBQ Partners LLC

Columbus, Ohio

October 2, 2020