Choosing between two single-phase-to-three-phase variable frequency drives (VFDs) usually comes down to motor size and input flexibility. On one side is a 2.2 kW drive listed at $65.83; on the other, a 7.5 kW drive listed at $130.11. Both are new, both take 220V input, and both output three-phase power, but the $64.28 spread shows they are aimed at different jobs.
Quick verdict
If you are powering a modest three-phase motor and want to keep installation compact, the 2.2 kW drive is the practical, cost-conscious choice. If you need more headroom or may have to work with either a 1-phase or 3-phase supply, the 7.5 kW drive earns the extra spend with a wider output frequency range and an input that can be wired either way.
Price and spec comparison
| Drive | Listed price | Price bar | How they compare |
|---|---|---|---|
| 2.2 kW 3 HP 1-to-3-phase VFD | $65.83 | 220V input, 1-phase input, 3 HP, 23A input current | |
| 7.5 kW 10 HP 1-to-3-phase VFD | $130.11 | 220V input, 1- or 3-phase input, 10 HP, 20A per phase |
Where each drive wins
- Choose the 2.2 kW drive for compact, lower-cost installations. The product description highlights a narrow body, independent air duct, efficient heat dissipation, and side-by-side mounting capability, all of which matter when panel space is limited.
- Choose the 7.5 kW drive for capacity and input flexibility. It handles higher motor loads, offers adaptable input wiring, and lists a 0-3200 Hz output frequency range, making it the better match for wider-ranging speed control.
Product notes
1 to 3 Phase Variable Frequency Drive Inverter 2.2 KW VFD 220 V 3 HP
This is the leaner option for a single-phase feed. It's the more affordable route to three-phase output for a 3 HP motor, and the design details support tight spots: a narrow body, independent air duct, and side-by-side installation are all called out, with an external keyboard option for flexible placement. The 23A input current rating gives a concrete boundary for planning the circuit. The limitation is that the input is listed as 1-phase only, so you don't get the dual-input option that the larger drive offers. If your motor stays within 3 HP and your panel space is at a premium, this drive keeps things simple and inexpensive.
1 To 3 Phase 7.5KW 10HP 220V Variable Frequency Drive Inverter CNC VFD VSD
This is the higher-capacity drive, and it gives you more room to adapt. It lists a 10 HP motor rating, an output frequency range of 0-3200 Hz, and SPWM control, with an input that can be wired as either 1-phase or 3-phase. That combination makes it useful if your supply setup isn't fixed or you want to use the same drive in different locations. The main catch is the description calling it a light-load model, so it's engineered more for moderate duty cycles like fans and pumps than for continuous heavy torque. The 20A per phase maximum helps set expectations for branch-circuit sizing. If your motor is at the top end of the range, the flexible input and wide frequency adjustment justify the higher price.
Final choice by use case
If your motor is at the lower end of the capacity range and your enclosure is tight, the compact 2.2 kW drive does the job without unnecessary bulk. Go with the larger drive when you need the top-end capacity, want its adaptable input wiring, or plan to adjust speed across a wide frequency band.
