look on the back of the fridge
get the LRA off the tag on the compressor
you CAN NOT go by any reading on a clamp on meter or even a Kill-A-watt
they are not capable of reading the LRA spike, the response aka sampling time of those meters is not fast enough
also should be noted, the avg consumer inverter has a very short surge time rating like 5 Micro-seconds
my Trip-lite commercial grade 1250w weights 22pounds
most of that weight is the heavy transformer inside
it will carry 2500w for 10 seconds
thats 200,000 times longer than the avg surge rating time of the avg consumer inverter PSW or MSW