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Trying to self install a VFD on a home AC unit will be problematic. There do exist single phase VFDs, and I expect I could get one to work on my AC unit. But building proper controls for it would require more effort than it's worth.
The soft start kits are designed with "home installer" in mind. Again, limiting the inrush to ~150% solves most of the starting problems.
On large 3ph motors, I agree. We "forced" one of our equipment suppliers to supply VFDs to meet local utility inrush issues. It also saves huge amounts of energy when running part load vs. how they normally operate. 1500 hp 4160 motor
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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