Shelley was a key member of a close circle of visionary poets and writers that included Lord Byron; Leigh Hunt; Thomas Love Peacock; and his own second wife, Mary Shelley, the author of Frankenstein.
If the 900 watts means the input power, then 1000 w inverter would be ok. If the microwave produces 900 w of cooking power, you will need a bit more, maybe 1200-1400 w if you don't know what the input power rating of the microwave is.
Best Answer: I used to sell appliances, and we always recommended 18 inches between the burner and the bottom and the microwave. Also, go to a manufacturer website such as Whirlpool, click on a particular over-the-range micro, and then click on the installation instructions for it. I suspect you'll find the same answer.