Will an EcoFlow STREAM Ultra run a diesel air heater? (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.
Yes, it runs it — no usable-capacity figure see why below ↓
Every check passes. What this page will not do is turn a nameplate watt-hour rating into hours — see the evidence below for why.
Official spec + Derived by WattPairverified 2026-08-09US 120 V unit × diesel air heater
Running34 Wof800 Wcontinuous output
0 – 800 W across the rails above
No start-up rail: this start lasts minutes rather than milliseconds, so it was checked against continuous output rather than against a surge rating.
Two numbers decide this, and readers use them interchangeably: watts are the ceiling on what the inverter holds at any instant, watt-hours are how much energy the battery holds. A machine can have plenty of one and not enough of the other.
The verdict is a calculation, not a lookup. What it will not do is print a runtime, and the reason is specific: we read 3 of EcoFlow’s own published documents on 2026-08-08 and found no depth of discharge or inverter efficiency for the US 120 V build in them, so there is no usable-capacity figure to divide.
Where those numbers come from
A blank is never left blank. A field we have found no figure for 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 states a nameplate watt-hour number for it, and we read 3 of EcoFlow’s own published documents on 2026-08-08 and found no depth of discharge or inverter efficiency for the US 120 V build in them. 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
We have found no published surge rating for the US 120 V build. 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
34 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 diesel air heater demands
No surge rating covers this one, so the engine did not use one: the start-up load lasts 60 seconds rather than milliseconds, and a demand of that length is checked against CONTINUOUS output, where a load that long belongs. That check is the one in the panel above.
Start-up figure Manufacturer-stated
The start-up figure is published by the manufacturer for this device, so it describes the actual hardware rather than a category.
What the EcoFlow STREAM Ultra offers
This figure is ours, not the brand’s: the continuous rating used as a conservative floor because we have found no surge rating for the US 120 V build.
Where to buy
Out of stock at the official store · checked 2026-08-18
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 2026-08-17
If this is not the pairing
BLUETTI Elite 30 V2 (US 120 V) reaches the same conclusion on a diesel air heater at 600 W continuous, and it is $239. 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 diesel air heater has a dedicated guide: the same records this page computes from, worked through in prose with room for the reasoning a table can only summarise — Can a power station run a diesel heater, and for how long?