Phase Perfect vs. Everything Else.
Stop wasting money on lost power and burned-out motors. Enter your load size and the hours per day you are working with your equipment to see what you’re spending with a rotary converter and how much you’ll save with a Phase Perfect today.
Calculations assume $0.20/kWh. Phase Perfect idles at 80W; a comparable rotary idles at ~11% of rated HP. Check your regional rate →
| Feature | Phase Perfect® Digital Converter | Rotary Converter | Static Converter |
|---|---|---|---|
| Running Efficiency | 98.7% | ~87% — 13% wasted as heat | ~50% — only powers 2 of 3 windings |
| Voltage Imbalance | <2% — utility standard | 3–8% — stresses motors | High — only 2 phases are powered |
| Standby Power Draw | 80W — barely anything | 2,000–4,000W+ | Low |
| Noise Level | Near silent — no moving parts | Loud — always spinning | Silent |
| Motor Power Output | 100% — all three phases powered | ~85% — voltage imbalance reduces output | ~50–65% — motors run hot & weak |
| Motor Life Impact | Full life — clean balanced power | Reduced — imbalance causes heating | Significantly reduced — runs hot |
| Multiple Machines | Run several simultaneously | Yes, if sized correctly | One machine at a time |
| Maintenance Required | None — fully solid state | Capacitors every 1–3 years | Occasional capacitor check |
| Built-in Protection | Digital fault monitoring | None | None |
| Yearly Operating Cost (10 HP) | ~$24/yr | ~$1,700/yr | ~$12/yr idle, but motors wear faster |
| Starting and Load capacity | 10 HP | 20 HP Required (2× Oversized) | — |
| Physical Presence | Compact, Lightweight, Quiet | Large, Heavy & Loud | — |
| Monitoring & Controls | Built-In Display, Keypad & Modbus | None | — |
| Regenerative Technology | Returns Energy During Shutdown | Wasted Energy / No Regeneration | — |
| Installation | 2 Wires In, 3 Out | Complex Wiring Required | — |
| Enclosure | Low Cost NEMA 3R Available | $$$ Expensive 3R | — |
Found a Rotary for Less? We’ll Match It.
Same power rating, lower advertised price? Send it over and we’ll match it — and you still take home the digital converter that actually balances your power. See what qualifies →
Equivalent to 7.5 HP Rotary
For a single 3 HP machine — a knee mill, a small lathe, a grinder, or a drill press.
Equivalent to 10 HP Rotary
Runs a jointer, a planer, a bandsaw, or a shaper.
Equivalent to 15 HP Rotary
For serious home shops — a big engine lathe or a car lift.
Equivalent to 20 HP Rotary
For full shops running larger gear — a wide-belt sander with its dust collection running alongside.
Equivalent to 30 HP Rotary
For heavy shops — whole-shop dust collection with several machines running together.
Equivalent to 40 HP Rotary
The largest in the line. Runs a full 20 HP machine, or a home shop's worth of three-phase gear running at once.
Phase Perfect Residential Pro Downloads
Built In The USA
Proudly American Made
Every Phase drive is engineered, assembled and tested at our Rapid City, South Dakota headquarters — with the industry’s fastest lead times.
BABA Compliant · Build America, Buy America