Which electrode size can I weld off-grid?

Rule of thumb: electrodes up to approx. 2.5–3.2 mm are readily doable with a 3.6 kW unit like the GM 3600, depending on the welding current and duty cycle (ED) of the welder. Larger electrodes at high current can exceed the continuous power.

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Can a power station run a welder?

Q: Can a power station run an inverter welder?

Yes, if three things are right: sufficient continuous power for the welding current, enough peak reserve for the arc-ignition moment and a pure sine wave. The GM 3600 delivers 3,600 W continuous, up to 18 kW peak and a pure sine wave, and thus runs typical inverter MMA welders off-grid.

Q: Why is a pure sine wave important for welding?

Inverter welders have sensitive input electronics. A modified sine wave can damage them or cause an unstable arc. A pure sine wave (as on the mains) is required for stable, safe welding.

In short: Yes – if the continuous power, peak reserve and waveform are right. What really matters for off-grid welding and which unit is suitable.

Green MeOH GmbH · 06/2026 · Reading time approx. 4 min.

The three requirements

Running a welder off-grid comes down to three factors:

Continuous power: It has to match the welding current. Depending on the set current, an inverter MMA unit draws roughly 2–5 kW from the mains.
Peak reserve: When igniting the arc and during short circuits, brief load peaks occur – here a high overload reserve helps (see Inrush current & 18 kW peak).
Pure sine wave: Inverter welders have sensitive input electronics. A modified sine wave can damage them or make the arc unstable. A pure sine wave is mandatory.

An often overlooked value is the duty cycle (ED) of the welder: it indicates how long you can weld under full load before a break is needed – it also relieves the power source.

Which welder type runs off-grid?

Welding process	Typical power demand	With GM 3600 (3.6 kW / 18 kW peak, pure sine)
Inverter MMA (stick/manual)	~2–5 kW depending on current	Yes – electrodes up to approx. 2.5–3.2 mm readily doable
WIG / TIG	~1.5–4 kW	Yes – within the usual power range
MIG/MAG (shielding gas)	~3–6 kW	In the lower/medium range; mind continuous power at high current

In practice: The GM 3600 delivers a pure sine wave, 3,600 W continuous and up to 18,000 W peak (measured 18,462 W). This lets you run typical inverter MMA and TIG units off-grid and emission-free – ideal for assembly, repair and indoor construction sites.

GM 3600 – pure sine wave, 3.6 kW, up to 18 kW peak

Weld, drill, saw off-grid – emission-free. From €2,999 net.

To the GM 3600 & comparison →

Frequently asked questions

Can a power station run an inverter welder?

Yes, with sufficient continuous power, peak reserve and a pure sine wave. The GM 3600 (3.6 kW, 18 kW peak, pure sine) runs typical inverter MMA units off-grid.

Why is a pure sine wave important for welding?

Inverter welders have sensitive electronics. A modified sine wave can damage them or make the arc unstable – a pure sine wave is required.

Which electrode size is doable off-grid?

Rule of thumb: up to approx. 2.5–3.2 mm with a 3.6 kW unit, depending on welding current and duty cycle. Larger electrodes at high current can exceed the continuous power.

Note: values are guideline figures. The specifications of the welder manufacturer are decisive (power, duty cycle, starting behaviour).