Uninterrupt power supply is mainly use for short time. means according to ups VA it gives backup. ups is also two types: on line and offline. online ups having high volt and amp for long time backup with with high dc voltage. but ups start with 12v dc with 7 amp. but inverter is startwith 12v, 24,dc to 36v dc and 120amp to 180amp battery with long time backup.
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