Choosing between these two 220V variable frequency drives comes down to power headroom versus price. Both convert single-phase input into three-phase output for motor controls, but one is built for 10HP loads and the other for 3HP loads. If you need to run a CNC spindle, grinder, or compressor, the higher-rated drive gives you room to grow. If you just need a 3HP motor running on single phase, the compact drive costs much less and takes up less panel space.
Quick verdict: If your motor is a 3HP single-phase setup and you want the lowest cost, pick the 2.2KW 3HP drive. If you need up to 10HP capacity for heavier equipment, or if you want the flexibility to accept either 1 or 3 phase input, pick the 7.5KW 10HP drive.
| Specification | 7.5KW 10HP VFD | 2.2KW 3HP VFD |
|---|---|---|
| Listed price | USD 158.90 | USD 65.83 |
| Rated output | 7.5KW / 10HP | 2.2KW / 3HP |
| Input voltage | 220V | 220V |
| Input phase | 1 or 3 phase | 1 phase |
| Input frequency | 48-63 Hz | 50-60 Hz |
| Operating humidity | 0-95% RH without dew | 10-95% RH without dew |
| Condition | New | New |
Where each product wins
- The 7.5KW drive wins when the load is a compressor, CNC router, spindle motor, or grinder with higher power demands.
- The 2.2KW drive wins on cost and panel footprint, and its external-capable keyboard helps when the drive is buried in a control cabinet.
7.5KW 10HP 220V Variable Frequency Drive Inverter
The 7.5KW 10HP 220V Variable Frequency Drive Inverter Single To 3 Phase CNC VFD VSD is the heavy lifter here. It can run constant-torque loads such as hard-starting air compressors and HVAC units, and it is also suited to a CNC router, spindle motor, or grinder. It uses an SPWM control mode and can be fed from either a single-phase or three-phase 220V supply, with a rated input frequency of 48-63 Hz. The tradeoff is that you are paying for 10HP capacity you may never use; a 3HP motor will not run better simply because the drive is larger.
2.2KW 3HP Variable Frequency Drive Inverter
The 1 to 3 Phase Variable Frequency Drive Inverter 2.2 KW VFD 220 V 3 HP is the practical choice for a 3HP single-phase setup. It has a 23A input current and is built around saving panel space: the narrow body uses an independent air duct for top-to-bottom airflow, and multiple units can be installed side by side, helping you use installation space efficiently. You can also place the keyboard externally, which makes parameter changes easier when the drive is tucked into a cabinet. At USD 65.83, you will have money left over for wiring and accessories. The main limitation is that this model is rated for 2.2KW/3HP and accepts only a single-phase input, so it does not offer the 10HP headroom or 3-phase-input flexibility of the higher-priced drive.
Final choice by use case
- Choose the 7.5KW 10HP drive when your equipment needs more power than a 3HP drive can provide, or when you want the option to feed it from either 1 or 3 phase supply.
- Choose the 2.2KW 3HP drive when a 3HP motor on single-phase power is your whole application and keeping the control panel compact matters more than future expansion.
