Will an EcoFlow STREAM Ultra run a CPAP machine? (US 120 V)
Sales restriction US-UT only
Due to restrictions under the H.B. 340 Solar Power Amendments, this product is only available for sale and plug-and-play installation in Utah. Please note that you are solely responsible for ensuring your installation and use of the product strictly comply with applicable laws and regulations regarding where the product is intended to be installed/used.
Tight fit — no usable-capacity figure see why below ↓
This load’s manufacturer asks for a pure sine wave and EcoFlow does not publish this model’s inverter waveform. The watts are not the problem — the refusal to assume a waveform is.
officialverified 2026-08-01US 120 V unit × CPAP machine
Two numbers decide this, and readers arrive using them interchangeably. Watts are the ceiling on what the inverter can hold at any instant — a CPAP machine needs 22 W of them while it runs. Watt-hours are how much energy the battery holds, and the EcoFlow STREAM Ultra holds 1,920 Wh of them on the nameplate. A machine can have plenty of one and not enough of the other.
The verdict above is a calculation — running watts, start-up inrush and inverter waveform against this machine's continuous output and surge ceiling — not a lookup. What it will not do is print a runtime, and the reason is specific: EcoFlow publishes no depth of discharge or inverter efficiency for this model, so there is no usable-capacity figure to divide.
Where those numbers come from
Every figure below carries the tier it came from and the date it was checked. A blank is never left blank: a field the manufacturer does not publish says so, and a field whose sources disagree — two documents, or one document with itself — says that instead of picking one.
No usable-capacity figure for this machine
EcoFlow publishes a nameplate watt-hour number and nothing about depth of discharge or inverter efficiency for this model. Dividing the nameplate by this load would be wrong by 20–35% in the flattering direction, so this page shows the nameplate for what it is and refuses to turn it into hours.
Missing: station.usable_capacity_wh
The surge ceiling on this page is ours, not the manufacturer’s
EcoFlow does not publish a surge rating for this model. So the start-up check runs against the continuous output instead — an inverter cannot surge below what it sustains, which makes that the safest number we can defend. Real inverters usually manage 1.5–2× their continuous rating, so a start-up call held back by this figure may well be fine in practice; we are not going to say so until the manufacturer does.
Energy rate instead of a runtime
22 Wh per hour averaged over this load’s duty cycleThis number needs no battery figure at all, which is why this page can give it when it cannot give hours. Divide any usable-capacity figure you trust by it and you have your own runtime, with our arithmetic visible instead of hidden.
What a CPAP machine demands
The inverter is loaded to 44 VA — 22 W ÷ 0.50 — which is the quantity its ceiling is actually measured against.
What the EcoFlow STREAM Ultra offers
This figure is ours, not the brand’s: the continuous rating used as a conservative floor because no surge rating is published for this model.
Where to buy
Out of stock at the official store · checked 2026-08-01
We are not showing a buy button for the EcoFlow STREAM Ultra: the manufacturer restricts where this product may be sold and installed. The link below goes to the official product page so you can check your own location.
Where to buy the EcoFlow STREAM Ultra
Prices checked 2026-08-01
If this is not the pairing
EcoFlow RIVER 3 Plus (US 120 V) — 600 W continuous · from $259. See that pairing →
Jackery Explorer 1000 v2 (US 120 V) reaches the same conclusion on a CPAP machine at 1,500 W continuous, and it is $499. Cheaper is only cheaper when the answer is the same — this one is. See that pairing →
The same load on the machines beside it
The same machine on the loads beside it
Where to go next
A CPAP machine has a guide of its own: the same records this page computes from, worked through in prose with room for the reasoning a table can only summarise — How many nights can a power station run my CPAP?