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We will try to tell you in one video about the types of uninterruptible power supplies, their differences, pros and cons that will help you make the right choice. Quick transition: 00:00 introduction 01:06 OFF-Line UPS type 02:45 Line-Interactive UPS 04:49 On-Line UPS 08:13 how many batteries are needed for UPS operation 08:54 output signal shape (sine square wave) 09:46 battery charging current 11:08 battery life 12:06 which batteries are suitable for UPS A catalog of UPS and filters for their selection is on our website at the link https://voltmarket.ua/istochniki-besp... If you have any questions, feel free to call our consultants, we will help you decide and buy exactly what you need. +380567984106, +380639447106, +380675447106, +380509447106 VoltMarket. Stores of stable power supply www.voltmarket.ua Dnipro, Bohdan Khmelnitsky Avenue, 15. Mon - Fri, 9:00 - 18:00; Sat, 10:00 - 13:00. Kyiv, Mira Avenue, 6. Mon - Fri, 9:00 - 18:00 Kyiv, Vozdukhoflotsky Avenue 55. Mon - Fri, 9:00 - 19:00 Kharkiv, Moskovsky Avenue, 35. Mon - Fri, 9:00 - 18:00, Sat, 10:00 - 13:00. Odessa, Razumovskaya street, 17. Mon - Fri, 9:00 - 18:00, Sat, 10:00 - 13:00.