Another option is to install a Maintenance Bypass Switch to allow testing/removal/exchange of a UPS without disrupting the protected equipment. Note that while in Bypass, the protected gear is directly connected to utility power without UPS protection. 120V 15A, 20A, 30A models available: https://www.amazon.com/CyberPower-MBP20A6-Maintenance-Outlets-Rackmount/dp/B01615H3CK/