going to buy AVR for my refrigerator

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having read online that electricity fluctuates specially here in this country. that refs now easily gets problem after two years because it damages the main board and the compressor of the ref. old refs usually don't have this problem but we got rid of ours it looks old and had some screws and hinges problems. I have searched online to determine the avr to buy. i learned its not only the rate power input I need to calculate but also to include or add the defrost input. so i thought 500 avr watts was enough for my 70 watts power input. but with 140 watt defrost input, i need like 1000 watts avr.