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.
Home Â» What transformer size should I use for my low-voltage landscape lighting system? What choices are available? Transformers are available in 300, 600, 900, 1200, and 1500 watts. The size transformer you need will depend on the number of lights, wattage of lights, and length of wire run to the lights. Note that transformer sizing is not as simple as adding together the wattage of all the lights on a system to determine the correct transformer size.