Main trade-off
OUPES Mega 1
The 36-minute full-charge claim requires AC and solar together.
Head-to-head
OUPES Mega 1 vs EcoFlow DELTA 3: Mega raises the appliance ceiling, DELTA shortens rated transfer time
The short answer
Choose Mega 1 for a higher appliance ceiling and solar intake. DELTA 3 suits a shorter transfer-time requirement with almost identical carry weight.
Before you choose
The reasoning and the trade-offs
A common load makes the reserve easier to compare
For a steady 300W load, OUPES Mega 1 models to about 2.7 hours and EcoFlow DELTA 3 to 2.7 hours.
What this is based on
Hours = nominal Wh × 0.8 / 300W. Inputs 1024Wh and 1024Wh. The 80% factor is a shared planning allowance for unusable energy and conversion losses, not a measured efficiency. Idle draw, temperature and the real load change runtime.
Main trade-off
EcoFlow DELTA 3
One 500W solar input cannot make use of the Plus model 1000W two-input setup.
OUPES Mega 1
- Choose it for
- A supported load exceeds 1800W
- Plan to use more than 500W of solar
- Main trade-off
- The 36-minute full-charge claim requires AC and solar together.
EcoFlow DELTA 3
- Choose it for
- Need a 10ms transfer specification
- Prefer an EcoFlow expansion setup
- Main trade-off
- One 500W solar input cannot make use of the Plus model 1000W two-input setup.
About this comparison
Choose Mega 1 for a higher appliance ceiling and solar intake. DELTA 3 suits a shorter transfer-time requirement with almost identical carry weight.
Capacity does not decide this pair
Winner by situation
Start with what you need it to do
A supported load exceeds 1800W
Mega 1 is rated for 2,000W continuous output and DELTA 3 for 1,800W. A 1,900W running load fits only the Mega rating. Its startup demand and outlet requirements still need checking.
- OUPES Mega 1
- Better fit
- EcoFlow DELTA 3
- Not suitable
Need a 10ms transfer specification
DELTA 3 publishes a 10ms transfer limit against 20ms for Mega 1. That meets the stated specification preference, although neither figure guarantees continuity for every connected device.
- OUPES Mega 1
- Not suitable
- EcoFlow DELTA 3
- Better fit
The battery needs to cover a steady 300W load
The shared planning case gives 2.7 hours from OUPES Mega 1 and 2.7 from EcoFlow DELTA 3. Measure actual wattage before choosing a required overnight reserve.
- OUPES Mega 1
- Depends
- EcoFlow DELTA 3
- Depends
I want to replenish the battery with solar
The maximum input is 800W for OUPES Mega 1 and 500W for EcoFlow DELTA 3. Compare your actual panel strings with the voltage and current limits as well as this total.
- OUPES Mega 1
- Depends
- EcoFlow DELTA 3
- Depends
What matters in practice
The differences that matter
A common load makes the reserve easier to compare
For a steady 300W load, OUPES Mega 1 models to about 2.7 hours and EcoFlow DELTA 3 to 2.7 hours.
How we reached this conclusion
Hours = nominal Wh × 0.8 / 300W. Inputs 1024Wh and 1024Wh. The 80% factor is a shared planning allowance for unusable energy and conversion losses, not a measured efficiency. Idle draw, temperature and the real load change runtime.
What you gain for each pound carried
OUPES Mega 1 stores about 36.8 nominal watt-hours per pound, compared with 37.1 for EcoFlow DELTA 3.
How we reached this conclusion
Nominal energy divided by published weight: 1024 / 27.8 and 1024 / 27.6. This compares stored energy per lifting weight, not measured efficiency or handle comfort.
Near-equal size class with different priorities
Mega 1 provides 60% more maximum solar intake than DELTA 3, while DELTA 3 halves the published transfer-time figure.
How we reached this conclusion
(800 / 500 - 1) × 100 = 60%. Transfer limits are 20ms and 10ms, not zero-interruption guarantees.
Choice A
OUPES, Mega 1
Mega 1
A manageable starter battery with room to grow. Its 2000W inverter can cover a short high-draw job, while two optional B2 batteries address the very different problem of making smaller loads run longer.
- Best matched use
- A small backup system that may need much more runtime later.
Checked facts
- 1024Wh capacity and 2000W continuous AC output.
- About 27.8 lb.
- Two B2 batteries increase total capacity to 5120Wh.
- 800W solar input and 1400W AC input.
- Two 100W USB-C ports and four AC outlets.
- Manufacturer lists transfer within 20ms.
Choice B
EcoFlow, DELTA 3
DELTA 3
The expandable DELTA 3 for buyers who do not need the Plus model extra solar input. The battery and inverter are the same size, so the simpler charging setup can be entirely sufficient.
- Best matched use
- Home essentials and camping loads with a moderate solar array.
Checked facts
- 1024Wh battery and 1800W rated AC output.
- About 27.6 lb.
- One 500W solar input with an 11V to 60V range.
- Two 100W USB-C ports and six AC outlets.
- Compatible DELTA-series expansion batteries supported.
- Under-10ms transfer and 1500W AC charging.
Meaningful differences
What changes the fit
| What changes | OUPES Mega 1 | EcoFlow DELTA 3 | Why it matters |
|---|---|---|---|
| Nominal battery energy | 1024 Wh | 1024 Wh | Stored energy determines the starting runtime budget. |
| Continuous AC output | 2000 W | 1800 W | This is the sustained rating used for load screening, separate from surge and boost modes. |
| Lifting weight | 27.8 lb | 27.6 lb | Wheels help on flat ground. A trunk, step or shelf still requires a lift. |
| Maximum solar input | 800 W | 500 W | The panel voltage, current and per-port limits must also fit. |
| Dedicated battery expansion | Supported with compatible equipment | Supported with compatible equipment | Charging from an external source is different from integrated battery expansion. |
| Published transfer limit | 20 ms | 10 ms | Verify the exact connected device. A short transfer specification does not guarantee uninterrupted operation for every load. |
What you give up
Every choice has a cost
If you choose OUPES Mega 1
- 1024Wh will not keep a 2000W appliance running for hours.
If you choose EcoFlow DELTA 3
- USB-C is limited to 100W per port rather than 140W.
What matters in practice
How to make the call
Capacity does not decide this pair
Both have 1,024Wh and weigh within 0.2 pounds. The base runtime and carrying burden are effectively the same planning class.
The output gap is useful only for the right load
Mega 1 adds 200W to the continuous ceiling. That helps a compatible load near 1,800W, but supplies no extra battery energy to electronics.
Transfer and solar point in opposite directions
DELTA 3 specifies 10ms transfer against 20ms for Mega 1. Mega lists 800W solar input against 500W. Choose the requirement you actually need.
What this comparison cannot tell you
- Runtime figures are planning estimates from published capacity, not hands-on discharge tests.
- Do not connect a station to home wiring without approved transfer equipment and qualified installation. A battery station is not a medical continuity guarantee.
What the facts say
What the comparison shows
Useful conclusions from the current portable power stations comparison, followed by the checked facts used to reach them.
Compared set
Only 6 of 50 models checked match every need here: “I want power for campsites and weekends away”, “I need backup for household essentials”, and “Solar is a real part of my recharge plan”.
6 matching models from 50 checkedMeasured difference
OUPES Mega 1 lists 2,000 W for rated AC output, 11% above EcoFlow DELTA 3 at 1,800 W.
- OUPES Mega 1
- 2,000 W
- EcoFlow DELTA 3
- 1,800 W
- Comparable models
- 47 of 50
See the checked facts and calculation notes
Match countThe count uses the current product-to-need assignments for “I want power for campsites and weekends away”, “I need backup for household essentials”, and “Solar is a real part of my recharge plan”. A need with no documented match does not count.
Calculation noteRated continuous output is used. Surge and voltage-lowering boost modes are excluded. 47 of 50 models have comparable published figures for context.
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| OUPES Mega 1 |
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| EcoFlow DELTA 3 |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
OUPES Mega 1
A supported load exceeds 1800W
See price & reviews on AmazonEcoFlow DELTA 3
Need a 10ms transfer specification
See price & reviews on AmazonLinks open in a new tab.