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A VFD can run multiple motors at once, but there are some important rules to follow. First, use motors with similar power ratings – ideally within two size grades of each other. Stick to the same brand and model if possible, as this helps them run in sync. Keep your cable runs reasonably short, and add reactors if needed. You’ll want to use V/F control mode and make sure your VFD can handle at least 20% more current than all motors combined. Don’t forget thermal relays for each motor – regular circuit breakers won’t cut it. For quick stops, you’ll need braking resistors. This setup works great for things like pump banks or fan arrays where loads stay pretty steady, but it’s not the best choice for precision work or systems with big load swings.