PW Power Systems’ FT8® MOBILEPAC® Unit Delivering Fast, Flexible Results to Upstream Oil & Gas Production

PW Power Systems (PWPS), a leading OEM of mobile aero-derivative gas turbines, is excited to announce that its FT8® MOBILEPAC® unit has demonstrated outstanding performance since its first mobilization by U.S. Well Services, Inc. (NASDAQ: USWS). USWS provides fully electric, fully mobile well stimulation services powered 100 percent by natural gas resulting in fracturing operations that are quieter, safer, more fuel efficient, and less disruptive to neighboring communities and the environment.

In fall 2018, USWS selected PWPS’ FT8 MOBILEPAC 30-megawatt, aero-derivative gas turbine units to power its patented Clean Fleet® technology. To help meet its customer commitments, USWS requires mobile power generation equipment that can handle the difficult operational profile typical of hydraulic fracturing applications: limited space for equipment; large and sudden changes in power demand; the need for clean and quiet operation; and the ability to demobilize, move to a new site, and be running again quickly with minimal resources.

PWPS delivered its first unit to USWS in late 2018, and it was mobilized to the first well pad in January 2019. Once in place, the MOBILEPAC unit began providing power and met all operational and performance requirements. The unit had no issues satisfying instant and significant load changes between fracking cycles, and noise levels were well below those of equipment previously used for this application. The final test was remobilization of the package to the next site, which was completed in less than 48 hours. Since then, three additional MOBILEPAC units have been deployed by USWS to well pads in Texas and Pennsylvania. The units have operated consistently and completed work on numerous pads through the first half of 2019.

“PWPS’ FT8 MOBILEPAC unit has successfully performed in many difficult power generation applications, but the demands of upstream O&G production may be even more taxing. We are pleased that, once again, our team and equipment rose to the challenge. We are confident with the results to date and look forward to further enhancing the package to address the unique demands of USWS operations. As part of MHPS Americas, we are happy to be an instrumental part of leading a Change In Power,” said Raul Pereda, President and CEO of PWPS.

Joel Broussard, Chief Executive Officer of USWS, noted, “U.S. Well Services Clean Fleet Technology is revolutionizing the pressure pumping industry. Using the MOBILEPAC unit has allowed us to reduce the amount of equipment, complexity, personnel, cost, and mobilization times required to complete jobs for our customers. The successful application of this technology is critical to the growth of our business.”

PWPS has a long legacy of delivering dependable and flexible gas turbine power plants. With a superior design that includes proven features of the successful FT8® SWIFTPAC® package, the FT8 MOBILEPAC gas turbine generator converts natural gas into electricity with high efficiency and is easily and quickly transportable by land, sea, or air. Its unique design enables rapid mobilization and demobilization with minimal crew and equipment.

About PW Power Systems

PW Power Systems LLC (PWPS) is a group company of MHPS Americas, headquartered in Lake Mary, Florida. PWPS has leveraged the advanced technology of Pratt & Whitney® aircraft engines and uniquely applied it to complex power-system solutions to become a leader in the power generation industry.

PWPS has more than 2,000 industrial gas turbines installed in over 50 countries and prides itself on being superior in the gas turbine repair and overhaul sector. The PWPS gas turbine engine portfolio offers competitive, efficient, and flexible products that generate 30 to 140 megawatts of power.

PW Power Systems is committed to providing high-quality solutions for the energy market that increase energy productivity and reliability and deliver operational savings for its customers. For more information, please visit www.pwps.com.

About U.S. Well Services, Inc.

U.S. Well Services, Inc. is a leading provider of hydraulic fracturing services and a market leader in electric fracture stimulation. USWS’ patented electric frac technology provides one of the first fully electric, mobile well stimulation systems powered by locally-supplied natural gas, including field gas sourced directly from the wellhead. USWS’ electric frac technology dramatically decreases emissions and sound pollution while generating exceptional operational efficiencies, including significant customer fuel cost savings versus conventional diesel fleets. For more information visit: www.uswellservices.com. Information on the USWS website is not part of this release.

Forward-Looking Statements

The information about USWS above includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other than statements of historical facts, included herein concerning, among other things, the benefits of MOBILEPAC units, future developments relating to technology, and USWS’ impact on the pressure pumping industry are forward-looking statements. These forward-looking statements may be identified by their use of terms and phrases such as “may,” “expect,” “believe,” “anticipate,” “will,” “should,” “could,” and similar terms and phrases. Although USWS believes that the expectations reflected in these forward-looking statements are reasonable, they do involve certain assumptions, risks, and uncertainties. These forward-looking statements represent the current expectations or beliefs of USWS, as applicable, concerning future events, and it is possible that the results described in this release will not be achieved. These forward-looking statements are subject to certain risks, uncertainties, and assumptions identified in this release or as disclosed from time to time in the Company’s filings with the Securities and Exchange Commission (the “SEC”). Factors that could cause actual results to differ from the Company’s expectations include factors described in USWS’ public disclosures and filings with the SEC, including those described under “Risk Factors” in its annual report on Form 10-K filed on March 14, 2019, and in its quarterly reports on Form 10-Q. As a result of these or other factors, actual results may differ materially from those indicated or implied by forward-looking statements.

Any forward-looking statement speaks only as of the date on which it is made, and, except as required by law, USWS does not undertake any obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise. New factors emerge from time to time, and it is not possible for us to predict all such factors.