I want to switch power somewhere where power outage happens frequently from utility to inverter and back and forth kind of like a UPS without giving up on my inverter and what I already have.
Electrical – What do I need to switch power automatically from utility to solar offgrid inverter with no downtime at all during the transfer
electricalhome-automationinverterpower-backup
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Best Answer
As mentioned in comments, typical inverter switch times are fine for most devices.
The only way I know of to literally have NO downtime is dual-conversion, where your inverter is supplying the AC power 100% of the time, and your grid power is converted to DC and fed into the battery / DC input of the inverter.
That has built-in inefficiencies (thus, wasted power), but is "zero-switch" time as there's never a switch on the inverted power, you just go from float-charging the batteries from AC & solar to drawing down the batteries/solar.