Which mobile power supply drives a welder on the construction site?

A battery power generator with sufficient peak power. The GM 3600 delivers 3,600 W continuously, is rated for 200 % (7,200 W) and handles peaks up to 18,000 W (500 %) – with a pure sine wave for the high inrush current of inverter welders, angle grinders and rotary hammers.

What is an emission-free power supply for the construction site?

A grid-independent battery solution without a combustion engine. It operates without exhaust fumes and almost silently, making it suitable for interiors, night construction sites and low-emission zones where diesel generators are not permitted.

How long does a battery box for heavy power tools run?

That depends on the load. With 2,134 Wh, the GM 3600 powers, for example, a 100 W site floodlight for about 18 hours, battery chargers all day long, and intermittent loads such as rotary hammers or cut-off grinders over many work cycles.

Is a battery power generator suitable for grid-independent event power?

Yes. Via the 230 V Schuko outputs (pure sine wave, 50 Hz), the GM 3600 powers lighting, sound, POS systems or drone charging stations quietly and emission-free – ideal for outdoor events, roadshows and temporary setups.

Mobile Power Supply on the Construction Site: 230 V Battery Box for Welders and Heavy Power Tools

No grid connection, but need 230 V? Diesel generators are increasingly ruled out due to exhaust fumes, noise and low-emission zones. A grid-independent, emission-free battery box like the GM 3600 delivers the same socket – powerful enough for welders and heavy power tools. This technical guide shows the typical power problems on the construction site and how to solve them.

Problem 1: Welders & high inrush current

Inverter welders, angle grinders and rotary hammers draw a multiple of their rated power at startup or during the arc. A mobile power supply for welders does not fail on continuous power, but on peak/inrush power and on a clean voltage waveform.

Technically decisive: The inverter must be able to overload significantly for short periods and deliver a pure sine wave, so that inductive loads are not throttled or damaged.

Overload level	Power	Duration (typ.)
Continuous power	3,600 W	continuous
150 %	5,420 W	~489 s
200 % (rated)	7,130 W	~50 s
250 %	8,940 W	~10 s
500 % (peak)	≈ 18,000 W	~1 s

The values come from the test report. That the performance is not just a datasheet promise is shown by the lab test under double rated load:

Lab test – 2× rated power: On the 20 kW RLC test bench, the GM 3600 runs stably even at ≈ 7,200 W (200 % overload) – clean sine wave, no throttling.

Problem 2: Emission-free construction site – where diesel is banned

Interiors, underground garages, night construction sites and urban low-emission zones increasingly require an emission-free construction site power supply. A battery power generator operates without exhaust fumes and almost silently – where a combustion engine may not be used or would disturb residents.

Zero emissions, no CO/NOx, no fuel storage
Quiet – suitable for indoor, night and weekend work
Low maintenance, ready to use instantly, no cold starts

Problem 3: Battery box for heavy power tools – runtimes

As a battery box for heavy power tools, the GM 3600 with 2,134 Wh capacity delivers enough energy for a working day. Guide values (depending on use):

Device	Power	Runtime (approx.)
LED site floodlight	100 W	~18 h
Battery chargers (DeWalt/Milwaukee/Hilti)	~200 W	all day
Rotary hammer (intermittent)	~1,000 W	many work cycles
Cut-off grinder / mixer (bursts)	2,000–3,000 W	depends on work cycle

Via the 230 V Schuko outputs, the box also charges the batteries of your existing professional tools (DeWalt, Milwaukee, Hilti, Stihl) directly on site – without a grid connection.

Problem 4: Grid-independent power supply for events

For outdoor events, roadshows, temporary lighting or drone/device charging stations, the GM 3600 delivers grid-independent power via several 230 V Schuko outputs (50 Hz, pure sine wave) – quiet and emission-free, without generator noise.

Technical key data (battery power generator, B2B)

Continuous power 3,600 W · Overload 200 % (7,200 W) · Peak 500 % (≈ 18,000 W)
Capacity 2,134 Wh · Charging time ~115 min · 230 V pure sine wave · IP54
Emission-free & quiet · Price from 2,999 € net (plus VAT) · B2B/volume terms on request

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Frequently Asked Questions (FAQ)

Which mobile power supply drives a welder?

A battery power generator with high peak power and a pure sine wave. The GM 3600 is rated for 200 % (7,200 W) and handles peaks up to 18,000 W – suitable for inverter welders, angle grinders and rotary hammers.

What is an emission-free construction site power supply?

A grid-independent battery solution without a combustion engine – without exhaust fumes and almost silent. Suitable for interiors, night construction sites and low-emission zones where diesel generators are not permitted.

How long does the battery box for heavy power tools run?

Load-dependent: with 2,134 Wh, e.g. a 100 W site floodlight for about 18 h, battery chargers all day, intermittent loads such as rotary hammers over many work cycles.

Is the system suitable for grid-independent event power?

Yes. Via the 230 V Schuko outputs (pure sine wave, 50 Hz), the GM 3600 powers lighting, sound or charging stations quietly and emission-free.

Further reading: Instagrid alternative for the construction site · Product page & measured values GM 3600 · Inrush current & 18 kW peak · Power station for welders.

DeWalt, Milwaukee, Hilti, Stihl and Instagrid are trademarks of their respective owners; no business affiliation. Power/runtime figures are guide values (depending on load and conditions), as of 06/2026, net plus VAT, subject to change.