Our verdict: The OUPES Mega 1 ranks 8th of the 10 portable power stations we compare, with 8.6 out of 10.
OUPES Mega 1
8.6/10
The OUPES Mega 1 is a 1,024Wh LiFePO4 power station with a 2,000W inverter and 4,500W surge. It suits shoppers who want to run power tools or a fridge off-grid, and who can live with a loud fan.
1,024Wh with 2,000W continuous and 4,500W surge for power tools
Up to 800W of solar input
Five-year warranty with an extra year after registration
Expandable with OUPES batteries and controllable via an app
Keep in mind
Around 12.6kg, heavier than the DJI
UPS switchover of up to 20ms, slower than the best here
A smaller UK support network than Anker, EcoFlow or Jackery
Why the OUPES Mega 1 scores 8.6
Each bar shows where it places among the 10 portable power stations in this guide, so a full bar is 1st of 10. How happy owners are counts for most of the score.
How happy owners are8th of 10
How many rated it8th of 10
How new it is2nd of 10
Why it sits behind the Anker SOLIX F3000
The Anker SOLIX F3000 (8.8) beats the OUPES Mega 1 (8.6) because it leaves owners a little happier.
About the OUPES Mega 1
The Mega 1 pairs a 1,024Wh LiFePO4 battery with a 2,000W pure sine wave inverter rated for 4,500W surge. Reviewers describe it as a compact box with two moulded carry handles, weighing about 12.6kg (27.8lb). It has a dozen or so outputs covering AC sockets, USB-C, USB-A, 12V barrel connectors and a car socket.
Charging is quick. Wall charging is rated at 1,400W, and one reviewer got a full charge in about 1.3 hours. Solar input goes up to 800W through an Anderson-style connector, with a full charge in about 2.2 hours on enough panels. It can take AC and solar together, and passes power through while charging. The unit shuts down at 2% charge.
The battery can grow. OUPES B2 expansion batteries (2,048Wh each) take the system to 3,072Wh with one and 5,120Wh with two. A Bluetooth and Wi-Fi app is available, and the unit also works without it. Most of the published reviews cover the US-market unit with 120V sockets, so check the socket layout on the UK listing.
What owners report about the OUPES Mega 1
We found little owner feedback specific to the UK version, so this draws on owner comments quoted by GadgetReview for the US unit. Those owners say it runs a circular saw and a fridge together, copes well on camping and off-grid trips, and recharges fast from the wall.
The main complaint is the fan. It comes on as soon as the load rises and stays on, which bothers anyone wanting quiet backup. Bob Vila found it noticeably louder than rival stations, and The Solar Lab called the fans very loud under load. One owner wanted better solar set-up guidance.
Reviewers also mention that voltage sags under heavy surges rather than briefly exceeding the 2,000W rating, that there is no built-in light, and that the app feels dated next to bigger brands. We found no reports on long-term durability.
Who the OUPES Mega 1 suits
Buy the Mega 1 if you need to start power tools, a compressor or a fridge from a 1kWh unit, want fast wall charging, or want the option of adding batteries later. It suits workshops, sites, vans and power cuts where a loud fan is acceptable.
Look elsewhere if you want a quiet unit for a bedroom or living room, or a lighter one to carry far: the Jackery Explorer 1000 v2 is the quieter choice, and the DJI Power 1000 Mini is smaller. Anyone planning to run a kettle or heater should consider the EcoFlow DELTA 3 Max Plus.
Questions about the OUPES Mega 1
Is the OUPES Mega 1 expandable?
Yes. OUPES B2 expansion batteries of 2,048Wh each bring it to 3,072Wh with one and 5,120Wh with two.
How big is the OUPES Mega 1?
About 37 x 25 x 32cm (14.7 x 9.8 x 12.5in) and about 12.6kg, according to GadgetReview's US listing figures. Check the UK listing for exact dimensions.
Is the OUPES Mega 1 loud?
Yes, under load. Bob Vila and The Solar Lab both report that the fan starts as the draw rises, and Bob Vila found it louder than on rival power stations.
Does the OUPES Mega 1 have an app?
Yes. It has a Bluetooth and Wi-Fi app, and the unit also works from its own controls. The Solar Lab found the app outdated against rival brands.
Other portable power station picks
The other badge winners in our portable power stations ranking.
Every score here comes from our ranking model; no editor sets the order. We haven't read the review sites for this guide yet, so for now it is led by owners. It ranks products by how happy owners are, holding back any product few owners have rated until more agree. How many rated it and how new it is only settle close calls, and value for money earns its own badge rather than a higher place. We compared 15 models for this guide before settling on these ten.
Brands can't pay to be included or to move up. We last checked these picks in November 2026.
