Coffee Roaster Voltage Guide: 110 V, 220 V and 380 V by Country — the Three Numbers to Send Before We Build

Why Voltage Matters Even on a Gas Roaster

A common misconception: “My roaster is gas, so power does not matter.” Every drum roaster you might buy — gas or electric — uses electric motors for the drum, cooling fan and exhaust fan, plus a control panel. A gas roaster typically draws only 0.5–2 kW, but that power must still match your wall socket in voltage, frequency and phase. Fully electric roasters draw far more (3–20+ kW), which is why electric heating is mainly offered up to the 3 kg class for single-phase buyers.

The Three Numbers You Must Tell Your Supplier

• Voltage — 110–120V, 220–240V, or 380–415V

• Frequency — 50 Hz or 60 Hz (affects motor speed; a 50 Hz motor on a 60 Hz grid runs ~20% fast)

• Phase — single-phase or three-phase

All three are factory configurations for your machine. Changing them before production costs nothing; changing them after delivery means replacing motors and control components.

Voltage by Region: Quick Reference

Single-Phase vs Three-Phase: Where Is the Line?

• Up to 12 kg (gas heating): single-phase 220–240V is normally enough, because gas provides the heat and electricity only runs motors and controls.

• Electric heating above ~3 kg: heating elements push the load beyond what a single-phase circuit handles comfortably — three-phase becomes necessary.

• 20 kg and above: plan for 380–415V three-phase regardless of heat source. Larger motors and your optional afterburner need it.

If your building has no three-phase supply, tell us early — on many mid-size machines we can configure the motor package for single-phase operation.

Circuit rating matters as much as voltage in some markets: in Australia and New Zealand a standard 10 A outlet supplies only about 2.3 kW, so most electric roasters need a dedicated higher-amperage circuit — see the Australia & New Zealand buyer guide.

Plugs, Breakers and Installation Details

“Where are the plugs for your machines?” is a real question from a recent buyer — and a fair one. The machine you order, if it is above 2 kW, is normally shipped without a molded plug, because plug standards differ by country. Your electrician hard-wires your machine or fits a local plug to your supplied cable. Prepare:

• A dedicated circuit with the breaker size stated on your quotation (typically 10–16A for gas models)

• Grounding — mandatory on your machine if it has a PLC or digital controls

• For an unstable grid: a voltage stabilizer sized to your control load

What to Send Us Before the Build

Three things settle the electrical build in one message, and they take your electrician ten minutes:

1. A photo of the distribution board with the main breaker and the circuit you intend for your roaster visible — it shows phase count and breaker rating better than any description.
2. The reading, not the nominal figure. "230 V" on paper is often 215 or 245 at the wall; a stabiliser decision depends on the real number and how much it moves during the day.
3. The frequency and the plug standard, and whether three-phase exists anywhere in the building even if not at your machine position — on a 20 kg machine that decides whether the fan motors go single or three-phase.

With those, your machine is wired, the nameplate stamped and the wiring diagram sent ahead, so the circuit is in before the crate lands; the commissioning guide covers the electrician's checks on the day. Every model from the DY-1 at USD 2,599 to the SD-60 Pro full set at USD 61,999 is built to the supply you send, at no extra charge.

Frequently Asked Questions

What draws the power on a gas roaster?

The drum motor, the exhaust and cooling fans, the burner ignition and the controls — typically 220 W on a DY-2 and under 2 kW on drums up to 15 kg. That is why gas machines run on an ordinary single-phase circuit in every market, and why the frequency matters more than the voltage: the motors are what a wrong frequency affects. Electric heating is a different question, because the element adds 4 kW and up.

Can one machine be built to run in two countries?

Not economically. Motors and controls are specified for one voltage and frequency, and a dealer moving a showroom machine from a 220 V/50 Hz market to a 110 V/60 Hz one is buying new motors. If you serve two markets, order machines for each; if a machine must travel — a trade-show unit, say — tell us both destinations and we specify for the one it will roast in and a transformer for the other.

Do PLC machines need anything extra?

A clean earth and, on an unstable grid, a stabiliser sized to the control load — a few hundred watts — because the PLC and touch screen are the parts a spike takes out. On three-phase machines the electrician must also confirm phase rotation at commissioning, or the drum and fan run backwards. Nothing else: the YS series Siemens controller runs on the same supply as the motors.

What breaker size should my electrician plan for?

The figure on your quotation, which is set by the machine's connected load: typically 10–16 A for gas-heated drums up to 15 kg, a dedicated 20–32 A single-phase circuit for the 4.4 kW electric DY builds, and a three-phase feed sized to the nameplate from 20 kg up. Give the electrician the nameplate rating and the wiring diagram we send ahead of delivery and the circuit is right first time.

Which countries most often get this wrong?

The mixed ones: Brazil, Mexico and Colombia, where 127 V and 220 V coexist in the same building; the Philippines and Saudi Arabia, where 220 V comes with 60 Hz; and any site where "we have three-phase" turns out to mean "somewhere in the building". The fix in every case is the same — send the board photo and the reading — and the regional guides for Latin America, the Philippines and the Gulf cover the local detail.

Final Thoughts

Coffee roaster voltage is three numbers — voltage, frequency, phase — read at your board rather than assumed from your country, and sent to us before the build. Get them right and the machine arrives wired, stamped and ready for the circuit your electrician has already installed; get them wrong and you are replacing motors. Send us the board photo and the reading. Talk to our engineers.

Get a Quote → WhatsApp +86 184 0771 4607

Written by Leon, Sales Engineer at Yoshan. Our factory has built commercial coffee roasters and the equipment around them since 1990.