you will get protction when the switch at the back of the inverter is in ups mode...
only voltage fluctuations...that is it goes to battery mode when low voltage like 180v and high voltage which is 265v...it will be clearly written in user manual
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i have a 800va inverter amaron iace with stantubular 150ah and its 5-6 years old and still giving backup like a king and no restarts even if lights + tv(32" bravia, airtel hd, cordlessphone(gigaset)) + fans running....
inverters do have swithcing time and the lights will blink for a sec but computers and other smps based lights(LED lights) dont even flicker for a second(not seen till now its blinking when power goes off and comes back)
one time my mother used a mixi without telling me and i was at the pc and all other load was switched off(no load except pc and standby mode of tv and airtel hd and cordless phone)....mixi is 550w philips
the pc is fine...nothing happened
whats your psu? and inverter model?
pc restart during at time of power goes off is due to weak battery or inverter set in inverter mode other than ups mode
we have LED lights and 2x pc and security cam dvr @ our shop and 2x 2000va inverters and i have a very good experience with it...the most robust inverter design...can withstand 440v ac when the neutral cut at home or at transformer or wire cut at pole and i have experienced this too
i am having Corsair RM650 other spec in sign and my inverter is bajaj ivx 600 and i think its on inverter mode
and have to connected your pc directly to wall socket or with spike guard