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What will an EcoFlow STREAM Ultra run? (EU)

A “1,200 W” power station is two numbers wearing one label. Watts are the ceiling on what you can switch on at once; watt-hours are how much energy is in the battery. The EcoFlow STREAM Ultra holds 1,200 W and stores 1,920 Wh on the nameplate — and those two facts answer two different questions.

This page answers the first one. We have found no published depth of discharge or inverter efficiency for the EU build. Without one of the two there is no defensible usable-capacity figure, and this page will not turn the nameplate into hours.

The three numbers that decide everything else

Continuous output 1,200 W
Official spec · verified 2026-08-01 · high confidence
Surge ceiling 1,200 W
Derived by WattPair · low confidence

We have found no published surge rating for the EU build. The figure shown is a conservative floor taken from the continuous output — an inverter cannot surge below what it sustains — and is not a manufacturer specification.

Nominal capacity 1,920 Wh
Official spec · verified 2026-08-01 · high confidence

No usable-capacity figure for the EU build

EcoFlow states a nameplate watt-hour number for it, and we have found no published depth of discharge or inverter efficiency for the EU build. Dividing the nameplate by a load would be wrong by 20–35%, so this page shows the nameplate for what it is and refuses to turn it into hours.

Missing: station.usable_capacity_wh

Official spec + Derived by WattPairverified 2026-08-01EU unit

What EcoFlow STREAM Ultra runs

Every row is a live calculation against this machine's continuous output, surge ceiling and inverter waveform — running watts, start-up inrush and duty cycle on the appliance side. Of 38 appliance profiles, 13 run, 7 are a tight fit and 18 are out of reach. The percentage is the load as a share of continuous output; anything past 82% drops out of the green.

One caveat that applies to every row: we have found no published surge rating for this model, so each start-up check runs against the continuous output as a conservative floor. Real inverters usually manage 1.5–2× that, so a row held back by the surge check may well be fine in practice — we will not say so until the manufacturer does.

12V portable fridge/freezer Refrigeration 90 W running · 180 W at start-up Runs it7.5% Air fryer Cooking 1,700 W running · 1,700 W at start-up limited by continuous output Too big142% Aquarium air pump Pumps 3.5 W running limited by surge ceiling We hold no start-up surge figure for this appliance, so the verdict is capped below green — the running watts alone are comfortable. Tight fit0.3% Aquarium heater Heating 100 W running · 100 W at start-up Runs it8.3% Box fan Cooling 80 W running limited by surge ceiling We hold no start-up surge figure for this appliance, so the verdict is capped below green — the running watts alone are comfortable. Tight fit6.7% Chest freezer Refrigeration 30 W running · 156 W at start-up Runs it2.5% Coffee maker Cooking 1,400 W running · 1,400 W at start-up limited by continuous output Too big117% CPAP machine Medical 22 W running · 22 W at start-up limited by inverter waveform This load needs a pure sine wave and we have found no inverter waveform for it, so no green light is given. Tight fit1.8% Desktop PC Computing 13 W running · 13 W at start-up limited by inverter waveform This load needs a pure sine wave and we have found no inverter waveform for it, so no green light is given. Tight fit1.1% Diesel air heater Heating 34 W running · 34 W at start-up Runs it2.8% Electric blanket Heating 60 W running · 60 W at start-up Runs it5.0% Electric kettle Cooking 3,000 W running · 3,000 W at start-up limited by continuous output Too big250% Electric space heater (1500 W) Heating 2,000 W running · 2,000 W at start-up limited by continuous output Too big167% Full-size refrigerator Refrigeration 55 W running · 286 W at start-up Runs it4.6% Gas furnace blower Heating 548 W running limited by surge ceiling We hold no start-up surge figure for this appliance, so the verdict is capped below green — the running watts alone are comfortable. Tight fit46% Hair dryer Personal care 2,100 W running limited by continuous output We hold no start-up surge figure for this appliance, so the verdict is capped below green — the running watts alone are comfortable. Too big175% Home oxygen concentrator Medical 312 W running limited by surge ceiling We hold no start-up surge figure for this appliance, so the verdict is capped below green — the running watts alone are comfortable. Tight fit26% Inverter window air conditioner (U-shaped) Cooling 667 W running · 667 W at start-up limited by mains standard Wrong mains Laptop computer Computing 5.2 W running · 5.2 W at start-up The measured inrush here is a millisecond-scale capacitive spike, which is not the same quantity as a surge rating and is not held against the verdict. Runs it0.4% LED light bulb Lighting 8.5 W running · 8.5 W at start-up Runs it0.7% LED TV TV & entertainment 108 W running · 108 W at start-up Runs it9.0% Microwave oven Cooking 1,480 W running limited by continuous output We hold no start-up surge figure for this appliance, so the verdict is capped below green — the running watts alone are comfortable. Too big123% Mini fridge Refrigeration 161 W running · 2,530 W at start-up limited by surge ceiling Too big211% of assumed surge ceiling Mini-split heat pump Cooling 1,740 W running · 1,740 W at start-up limited by continuous output Too big145% Pancake air compressor Power tools 1,800 W running · 10,800 W at start-up limited by continuous output Too big150% Portable air conditioner Cooling 1,300 W running · 9,100 W at start-up limited by continuous output Too big108% Portable induction cooktop Cooking 1,800 W running · 1,800 W at start-up limited by continuous output Too big150% Portable split air conditioner (hose-through-window) Cooling 1,500 W running · 1,500 W at start-up limited by continuous output Too big125% Router + modem Internet 9.1 W running · 9.1 W at start-up Runs it0.8% RV rooftop air conditioner RV & marine 1,690 W running · 8,619 W at start-up limited by continuous output Too big141% Starlink Mini Internet 40 W running · 60 W at start-up Runs it3.3% Sump pump Pumps 720 W running · 2,645 W at start-up limited by surge ceiling Too big220% of assumed surge ceiling Variable-speed pool pump Pumps 627 W running · 627 W at start-up Runs it52% Video projector TV & entertainment 345 W running · 345 W at start-up Runs it29% Washing machine Laundry 2,300 W running · 2,300 W at start-up limited by continuous output Too big192% Welder (stick / MIG) Power tools 2,700 W running · 2,700 W at start-up limited by continuous output Too big225% Well pump Pumps 660 W running · 6,762 W at start-up limited by surge ceiling Too big564% of assumed surge ceiling Window air conditioner Cooling 833 W running · 6,900 W at start-up limited by surge ceiling Too big575% of assumed surge ceiling

Solar panels this machine can legally take

The binding constraint is voltage, not watts: open-circuit voltage RISES as it gets colder, and an array that is fine at noon can be over the MPPT ceiling at dawn. Each row is the engine's largest legal array for this station, with Voc corrected to -10 °C ambient . Only panels whose datasheet publishes a voltage temperature coefficient are evaluated — the others cannot be corrected, and an under-corrected array is what destroys an MPPT input.

Jackery SolarSaga 100 Air 3 × 100 W · 3 in parallel · 300 W array Voc at the design minimum: 32.3 V Panel connector: DC8020 We have found no published connector standard for the EU build.
Renogy 100W N-Type Monocrystalline Solar Panel 4 × 100 W · 2S2P · 400 W array Voc at the design minimum: 49.7 V Panel connector: Solar Connectors We have found no published connector standard for this pairing.
Renogy 200W N-Type Monocrystalline Solar Panel 2 × 200 W · 2 in parallel · 400 W array Voc at the design minimum: 40.8 V Panel connector: Solar Connectors We have found no published connector standard for this pairing.

Every field we hold on this machine

Each figure carries the tier it came from and the date it was checked. A blank is never left blank: a field we have found no figure for says so, and a field two manufacturer sources disagree about says that instead of picking one.

AC output

What the inverter can hold, what it can start, and what shape the wave is.

Continuous output 1,200 W Official spec · verified 2026-08-01 · high confidence
Surge ceiling 1,200 W Derived by WattPair · low confidence

We have found no published surge rating for the EU build. The figure shown is a conservative floor taken from the continuous output — an inverter cannot surge below what it sustains — and is not a manufacturer specification.

Surge duration Not found in the sources we checked no figure to date
Boost mode No Official spec · verified 2026-08-01 · high confidence
Boost output Not found in the sources we checked no figure to date

The verdict engine never counts boost output as continuous output: it works by dropping voltage and can fail on motors and compressors.

Inverter waveform Not found in the sources we checked no figure to date
Inverter efficiency Not found in the sources we checked no figure to date
AC voltage Not found in the sources we checked no figure to date
AC frequency Not found in the sources we checked no figure to date
Outlet standard Not found in the sources we checked no figure to date
UPS switchover Not found in the sources we checked no figure to date
Idle draw Not found in the sources we checked no figure to date

What the machine consumes just being switched on. It sits in the runtime denominator, and a record we hold no figure for makes every runtime optimistic.

Battery and energy

The nameplate, what is actually retrievable from it, and how long the cells last.

Nominal capacity 1,920 Wh Official spec · verified 2026-08-01 · high confidence
Usable capacity Not found in the sources we checked no figure to date

Not on record, and not derivable: we have found no published depth of discharge or inverter efficiency for the EU build.

Depth of discharge Not found in the sources we checked no figure to date
Chemistry Not found in the sources we checked no figure to date
Cycle life 6,000 cycles Official spec · verified 2026-08-01 · high confidence
Capacity at end of cycle life Not found in the sources we checked no figure to date
Warranty 10 years Official spec · verified 2026-08-01 · high confidence
Discharge temperature (min) -20 °C Official spec · verified 2026-08-01 · high confidence
Discharge temperature (max) 55 °C Official spec · verified 2026-08-01 · high confidence
Charge temperature (min) -20 °C Official spec · verified 2026-08-01 · high confidence

Charging and expansion

How fast it refills from the wall, and whether more battery can be bolted on.

AC input (max) 1,050 W Official spec · verified 2026-08-01 · high confidence
Wall charge, 0–100% Not found in the sources we checked no figure to date
Wall charge, 0–80% Not found in the sources we checked no figure to date
Car input (max) Not found in the sources we checked no figure to date
Combined input (max) Not found in the sources we checked no figure to date
Expandable Yes Official spec · verified 2026-08-01 · high confidence
Capacity with expansion 11,520 Wh Official spec · verified 2026-08-01 · high confidence
Extra batteries supported 5 Official spec · verified 2026-08-01 · medium confidence

Solar input

The window an array has to land inside. Voltage is the constraint that burns hardware.

Solar input (max) 2,000 W Official spec · verified 2026-08-01 · high confidence
MPPT window (min) 15 V Official spec · verified 2026-08-01 · high confidence
MPPT window (max) 60 V Official spec · verified 2026-08-01 · high confidence
Input current (max) 14 A Official spec · verified 2026-08-01 · high confidence
Solar connector Not found in the sources we checked no figure to date

Physical and travel

Weight, size, noise — and whether an airline will let it on board.

Weight 23.1 kg Official spec · verified 2026-08-01 · high confidence
Length 458 mm Official spec · verified 2026-08-01 · high confidence
Width 284 mm Official spec · verified 2026-08-01 · high confidence
Height 255 mm Official spec · verified 2026-08-01 · high confidence
Noise 30 dB Official spec · verified 2026-08-01 · high confidence
App control Yes Official spec · verified 2026-08-01 · high confidence
Connectivity Wi-Fi, Bluetooth Official spec · verified 2026-08-01 · high confidence
Capacity for airline rules 1,920 Wh Official spec · verified 2026-08-01 · high confidence

IATA lets passengers carry lithium batteries up to 100 Wh freely and 100–160 Wh with airline approval. Above that, no passenger aircraft.

Where to buy

Where to buy the EcoFlow STREAM Ultra

Prices checked 2026-08-17

EcoFlow Official Store (EU) €599 View →

Compare with its neighbours

EcoFlow STREAM Ultra (US 120 V) The other region record for this model. Specs are recorded separately because they differ. Anker SOLIX Solarbank 3 E2700 Pro (EU) 1,200 W continuous against this machine's 1,200 W.

Each link goes to that machine's own record. Every record holds the same fields in the same order and states the same tier and date beside each one, so two of them read side by side compare cleanly.

Where to go next

Questions people ask about this machine

Will an EcoFlow STREAM Ultra run a full-size refrigerator?
Yes. Against the EU record, the full-size refrigerator draws 55 W running · 286 W at start-up — 4.6% of this machine's continuous output. That verdict is a calculation from running watts, start-up surge and inverter waveform, not a lookup, and the full working is one click away in the table above.
Why can't an EcoFlow STREAM Ultra run an electric space heater (1500 W)?
On the EU record the binding constraint is the continuous output. The electric space heater (1500 W) needs 2,000 W running · 2,000 W at start-up, and at 167% of continuous output there is no headroom to give. No accessory fixes this one — it takes a machine with a bigger inverter.
How long will an EcoFlow STREAM Ultra run my appliances?
We will not put a number on it, and that is deliberate. A runtime needs a usable-capacity figure, and we have found no published depth of discharge or inverter efficiency for the EU build — only a nameplate watt-hour rating. Dividing that nameplate by your load produces a confident-looking figure that is typically 20–35% too high. What this page gives you instead is every load's energy rate in watt-hours per hour, which needs no battery figure at all and is the number you actually size against.
Can you take an EcoFlow STREAM Ultra on a plane?
No. At 1,920 Wh it is far above the 160 Wh ceiling that airlines apply to lithium batteries in the cabin, and lithium batteries of this size are not accepted in checked baggage either. The 100 Wh / 160 Wh thresholds come from the IATA dangerous-goods rules that carriers implement; check your airline before travelling, because the approval step above 100 Wh is theirs to give.
Is the EU EcoFlow STREAM Ultra the same as the US one?
No, and we keep them as two separate records for that reason. The mains standards differ, which changes the outlets, the certifications and the charging figures. Where the brand publishes different numbers for the two, this page shows only the ones for the EU version.
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