UPS units from CyberPower. My favorite, the GX1325U (1325VA, 810 Watts, pure sine wave - mine is 7 years old and still running) is $124.99 + tax + ship (free w/Prime). There are a half dozen others as well.
Prelude to the Apocalypse: Dark Days in Alabama | The Shadetree Mechanic The Waif: Treasure Hunt (Lisa Bonner) | The Waif: Growing the Tribe An Accidental Family | Just Another Voicemail: Things Fall Apart The Coming Storms | Care & Feeding of a PAW Fiction Writer's Muse In the Dark | The Recycled Homestead: prelude to the apocalypse? Jack's War Book 1 | Jack's War Book 2 | Jack's War on Winter All books: www.amazon.com/stores/author/B01LVX00LP/allbooks