Welding power supply for the jobsite

Stick, MIG/MAG or TIG: welding sets draw a multiple of their rated current when the arc strikes. Portable storage delivers that current without diesel, without exhaust, and without a cable drum back to the nearest building supply.

Process first, sizing second

Fix the process — stick, MIG/MAG or TIG. Each has its own duty profile: stick welding runs in bursts, MIG/MAG runs continuously.
Read the input power and the duty cycle from the rating plate. The duty cycle states how long the set may run at a given current before it must cool — that, not peak power alone, decides the sizing.
Include the strike current. At arc strike the set briefly draws a multiple of its rated current; a storage unit that only just covers the rated load trips exactly here.
Check the voltage. MIG/MAG sets above the trade grade generally require 400 V three-phase. That leads to a three-phase configuration — not to a larger single-phase unit.

One unit, two units, three units

One unit covers stick welding at trade level and is carried to the weld by one person — the case nobody designs a cable drum for.
Two units in parallel cover longer seams plus the loads beside them: grinder, extraction, lighting — in parallel with the torch.
Three units deliver 400 V three-phase for sets that will not start without it, and spread the load across three storage units.

P-series parallel power systems

One modular platform. Add parallel units where the load grows — two or three units single-phase, or three units for 400 V three-phase.

Configuration	Units	Rated power	Usable capacity	Weight	Output
P25	1	2,500 W	2.7 kWh	29 kg	230 V / 16 A · single-phase
P25 + P25-D	2	5,000 W	5.4 kWh	≈60 kg	230 V · single-phase · AC230V/20A output
P25 + P25-D	3	7,500 W	8.1 kWh	≈90 kg	230 V · single-phase · AC230V/30A output
P25 + P25-T	3	7,500 W	8.1 kWh	≈90 kg	400 V · three-phase · AC400V/10A output

P25
Units
1
Rated power
2,500 W
Usable capacity
2.7 kWh
Weight
29 kg
Output
230 V / 16 A · single-phase
P25 + P25-D
Units
2
Rated power
5,000 W
Usable capacity
5.4 kWh
Weight
≈60 kg
Output
230 V · single-phase · AC230V/20A output
P25 + P25-D
Units
3
Rated power
7,500 W
Usable capacity
8.1 kWh
Weight
≈90 kg
Output
230 V · single-phase · AC230V/30A output
P25 + P25-T
Units
3
Rated power
7,500 W
Usable capacity
8.1 kWh
Weight
≈90 kg
Output
400 V · three-phase · AC400V/10A output

Wiring

The parallel distribution unit carries one power input and one data input per battery unit, and a single output to the load.

AC230V/20ATwo P25 units, 230 V single-phase.
AC230V/30AThree P25 units, 230 V single-phase.
AC400V/10AThree 230 V P25 units in parallel make 400 V three-phase — all three required, or the system loses a phase.

How the parallel link is wired

Each P25 runs one power cable and one data cable to its own input pair on the distribution unit.
The distribution unit has three input pairs (L1 / L2 / L3); one pair per battery unit.
Only the distribution unit output feeds the load. Battery units are never connected to the load directly.
Each unit keeps its own protective device; no unit back-feeds another.

Three configurations, one platform

Start with a single unit and add parallel units only when the load demands it. Every configuration runs the same battery unit and the same distribution unit.

P25
The core unit. A fanless, self-cooling 230 V power station that replaces the combustion generator on site — no exhaust, no idling noise, no fuel run.
Key figures
Rated power
2,500 W
Peak power
5,000 W (≤10 s)
Usable capacity
2.7 kWh
Output
230 V · 16 A
Protection
IP54
Weight
29 kg
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P25 + P25-D
Two or three units linked through the parallel distribution unit for 230 V single-phase loads. Power and capacity stack — start with two, add a third when the job needs it.
Key figures
Units
2–3 × P25
Rated power
5,000–7,500 W
Usable capacity
5.4–8.1 kWh
Output
AC230V · 20–30 A
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P25 + P25-T
Three 230 V P25 units in parallel produce the 400 V three-phase supply that runs tools which will not start on single phase. All three are required — remove one and the system loses a phase. Carried and assembled by hand: no crane, no lifting gear.
Key figures
Units
3 × 230V P25
Rated power
7,500 W
Usable capacity
8.1 kWh
Output
AC400V · 10 A three-phase
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Feature overview

Every part, numbered on the real machine — the same order as the wiring diagrams above.

P25 — the workhorse unit

Hitama P25 site power station front port panel: AC output socket, AC charging input, power switch, battery display, USB-C, solar input, parallel power and data ports — Port panel

AC output · 230 V / 16 APlug cutters, welders and drills straight in.
AC charging inputOn grid power, charge it overnight.
Power switchOne turn starts the station.
Battery displaySix LEDs — charge readable from the doorway.
USB-CKeeps phones and laptops topped up.
Solar inputFit a panel, keep charging on site.
Parallel power portPower line to the P25-D / P25-T box.
Parallel data portData line — the units stay in sync.

Hitama P25 portable power station three-quarter view: carry handle, IP54 enclosure, 2.7 kWh battery body — Body

Carry handle29 kg — carried by hand to the load.
IP54 enclosureDust-protected, spray-water protected.
2.7 kWh batteryUsable capacity per unit, fanless.

P25-D — 230 V parallel box

Hitama P25-D parallel distribution box front view: mounting hook, AC230V-30A output, breaker protection window, six parallel input ports — Front

Mounting hookHang the P25 units on the box.
EnclosureThe parallel box — ready out of the crate.
Parallel output · AC230V-30AThe only feed to the load.
Mounting stopHolds the box in place on the ground.
Protection device areaThe breakers, behind a protected window.
Parallel 1 inputP25 No.1 power line — AC230V-10A.
Parallel 1 data inputP25 No.1 data line.
Parallel 2 inputP25 No.2 power line — AC230V-10A.
Parallel 2 data inputP25 No.2 data line.
Parallel 3 inputP25 No.3 power line — AC230V-10A.
Parallel 3 data inputP25 No.3 data line.

P25-T — 400 V three-phase box

Hitama P25-T three-phase parallel box front view: mounting hook, AC400V-10A output, breaker protection window, six parallel input ports — Front

Mounting hookHang the P25 units on the box.
EnclosureThe three-phase box — ready out of the crate.
Parallel output · AC400V-10AThree-phase — the only feed to the load.
Mounting stopHolds the box in place on the ground.
Protection device areaThe breakers, behind a protected window.
Parallel 1 input · L1P25 No.1 power line — AC230V-10A.
Parallel 1 data inputP25 No.1 data line.
Parallel 2 input · L2P25 No.2 power line — AC230V-10A.
Parallel 2 data inputP25 No.2 data line.
Parallel 3 input · L3P25 No.3 power line — AC230V-10A.
Parallel 3 data inputP25 No.3 data line.

Optional accessory

Put the sun to work. A 400 W folding panel clips into the P25 solar input — charge on site, no mains. Parallel two of them: 800 W into the station.

Hitama 400 W folding solar panel for the P25 — unfolded four-section panel, folded case with orange handle, and a 3 m MC4 cable

Optional

Folding Solar Panel 400 W

One panel, 400 W. Folds flat, carries by hand, plugs into the P25 solar input. Parallel two panels — 800 W charging the station together.

Max. power (Pmax): 400 W
Voltage at Pmax (Vmp): 72 V
Current at Pmax (Imp): 5.56 A
Open-circuit voltage (Voc): 86.4 V
Short-circuit current (Isc): 5.89 A
Max. system voltage: 1000 V
Connector: MC4
Frame: ETFE
Protection: IP54
Weight: 9.1 kg
Size, folded: 612 × 590 × 50 mm
Size, unfolded: 2230 × 590 × 25 mm
Operating temperature: -40 °C to +70 °C
In the box: 3 m connection cable

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For dealers and rental fleets

OEM and ODM: we work with partners on these projects — from custom logo printing to adapted configurations.
For rental fleets the turnaround counts: a storage unit without a fuel station and without a cold start goes straight back out after return.
Tell us process, voltage and quantity — we confirm feasibility, required tooling and lead time.

Why not diesel

No exhaust: welding inside halls, tunnels and underground, where combustion engines are ruled out.
No refuelling, no oil change, no cold start in frost — precisely where a generator fails in the morning.
No engine noise: welding in residential areas and at night becomes possible at all.
Fanless cooling without vents — metal dust and grinding swarf cannot block anything.

Data sheet and dealer terms

Technical data, conformity and transport conditions are in the data sheet. Three details are enough for a sizing on your case: the process, the current you weld at, and whether three-phase is required.

Frequently asked questions

The questions buyers actually ask before a first order — answered with numbers from our own datasheets, not from a brochure.

Can a portable power station run a welding set?

Yes, if the strike current is covered. What decides is not the rated power of the set but the duty cycle and the brief current at arc strike. Ask the equipment maker for both figures and size on those — not on the amperage printed on the shop sign.

Why does the storage unit trip at arc strike although the rated load fits?

Because the protection reacts to short current peaks. A unit that only just covers the continuous load sits above it at strike current and disconnects. Planning reserve, or adding a second unit in parallel, is the usual route.

Do I need 400 V three-phase for MIG/MAG?

Above trade grade, generally yes. A single-phase output cannot serve a three-phase load, regardless of rating. If the rating plate says 400 V, the route is a three-phase configuration — not a larger single-phase unit.

How long does one unit last for a weld seam?

That depends on process, current and duty cycle; a blanket figure in minutes would be wrong. Add up the pure arc time and compare it with usable capacity. Pauses between seams do not count as load.