Oupes Mega 1

Oupes Mega 1

By Oupes · Portable Power Stations · Audio & Electronics

  • 1,024Wh LFP battery, expandable to 5,120Wh with two B2 packs
  • 2,000W pure sine wave AC (4,500W surge)
  • Net weight 27.8 lbs (12.6kg), 15.1 x 9.1 x 11.6 in

Lowest price seen
~$499.00 (approx.)
from $499.00 at Amazon

Prices are snapshots. Check the current price with the store.

Problems, parts and running costs

Summary

A 1,024Wh LFP portable power station with a 2,000W pure-sine-wave inverter, 800W solar input and a 5-year warranty, built for camping, van life and home backup where output-to-weight matters. Do not run it flat: owners report that a fully discharged unit can throw error E022 and refuse to charge.

Strengths

  • A 2,000W inverter in a 27.8 lb box is unusual for a 1,024Wh unit.
  • ZDNET lab-tested it as the most efficient portable power station in its class.
  • The Solar Lab measured 79% round-trip efficiency and pass-through charging that worked on AC and solar without interruption.
  • 800W solar input is high for this capacity class.
  • The port mix keeps a 12V car socket and DC barrel plugs that some rivals have dropped.
  • The 5-year warranty, extendable to 6 with registration, and a 30-day return window are generous for a budget brand.

Weaknesses

  • Owners report a fully discharged unit throwing error E022 and refusing to charge, needing a warranty replacement.
  • The inverter pulls voltage during surges instead of briefly exceeding 2,000W, which The Solar Lab flags as a risk to sensitive electronics.
  • There is no user-settable discharge floor, so 0% on the display is a real deep discharge.
  • The cooling fans are loud under load and during fast charging, reported by three independent testers.
  • The “36 minutes” charge claim is AC plus solar; wall charging runs about 1.3 to 1.5 hours.
  • ZDNET’s reviewer calls the molded handles uncomfortable and sharp-edged for a 30 lb load.

Verified specifications

BatteryLFP (LiFePO4), 1,024Wh; the manual lists 51.2V / 20Ah.
Inverter2,000W continuous, 4,500W rated surge, pure sine wave at 120V 50/60Hz.
Portsfour NEMA 5-20R AC outlets, two USB-C PD 100W, four USB-A at 18W max, two DC 5521 and one 12V car socket; OUPES counts 12 outputs on some pages and 13 on others.
Solar input800W max, MPPT 18-75V, 14A through an Anderson connector, up to three standard panels.
AC input1,400W fast or 700W slow; combined AC and solar input up to 2,200W. OUPES states 1,400W AC reaches full charge in about 58 minutes.
Cycle lifeover 3,500 cycles to 80%.
Expansionup to 5,120Wh with two B2 batteries of 2,048Wh each.
UPS/EPSunder 20ms switchover at up to 2,000W.
Weight and size27.8 lb (12.6kg); 15.1 x 9.1 x 11.6 in (384 x 232 x 295mm).
ConnectivityWi-Fi 2.4GHz and Bluetooth with app control; pass-through charging on both AC and solar.
Operating temperature0-40°C (30-104°F); IP21 per OUPES, though two reviewers cite IP54.
In the boxpower station, AC charging cable, car-to-Anderson cable, user manual and warranty card; solar panels depend on the bundle.
Warranty5 years, extendable to 6 with registration.
Full research notes and sources

Charging, in reality

The headline “36 minutes” is OUPES’s combined AC-plus-solar figure. OUPES’s own regional pages put 1,400W AC at about 58 minutes to full, the manual says about 1.3 hours, and Bob Vila measured under 1.5 hours from a wall outlet. ZDNET’s efficiency article reports the Mega 1 charging in 21 minutes against the Bluetti AC240’s 74 minutes, a figure that does not reconcile with a 1,024Wh battery or the manufacturer’s own numbers, so treat it as unexplained rather than as a charge time. Solar performance is the other gap: The Solar Lab tested in winter conditions and did not publish a solar-input wattage measurement, though the unit accepted third-party panels.

Deep discharge and the E022 fault

This is the caution to act on. There is no configurable discharge floor in the firmware or app, and an owner reports a Mega 1 that drained fully, showed E022 (cell low voltage) and then refused to accept charge from AC, from a charged B2 pack or from solar for a week. In the same thread a second owner reports a brand-new unit failing and a replacement failing on its second use, and a third poster says the flaw spans the OUPES line with no firmware fix. Support outcomes in that thread are mixed: one owner got a replacement easily, another was offered store credit and later saw a 15% restocking fee on a return. The Solar Lab measured the unit cutting off at 2% remaining, so a displayed 0% means the pack has already gone past its normal stop. Treat this as an owner-report cluster rather than a defect rate, but do not run the unit to empty.

Noise, app and daily use

The fans are the most consistent complaint: loud under load and during fast AC charging, reported independently by The Solar Lab, Bob Vila and ZDNET. ZDNET’s reviewer also dislikes the molded handles for a 30 lb load. The app is described as outdated, and one owner reports that setting any app timeout for standby or display disables remote access, forcing physical button presses. There is no built-in light, and the display can be hard to read off-axis. On the positive side, the 2,000W continuous output ran a refrigerator, a microwave, work lights and corded tools in Bob Vila’s three-week test without a failure.

Is it worth it?

The honest anchors are the direct OUPES listings: $699 for the unit, or $509 with a discount code (2026-10-03), while The Solar Lab has seen it near $439 and Bob Vila cited $419. Around $420-450 it is a strong buy, because the efficiency win is measured, the 2,000W output is real and the warranty runs 5 to 6 years. At the $699 direct list it is weak against better-known 1kWh stations that offer more stored energy per dollar. Size motor and compressor loads off the 2,000W continuous figure, not the 4,500W surge, and do not treat it as the primary power source for a well pump.

Which model this is

This page covers the OUPES Mega 1, a 1,024Wh / 2,000W LFP station first released in the second half of 2024; the US Amazon listing is ASIN B0DG8JQNS4. Do not confuse it with the Mega 1 Lite, which also claims 1,024Wh / 2,000W but has fewer ports and different charge claims, or with the Mega 1 solar-generator bundles, which use the same station. OUPES ships regional versions, and only the US and Canada tables show the NEMA 5-20R 120V/20A outlets.

Sources

Manufacturer:

Independent reviews:

Owner reports:

Buying guides for this category

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