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 RIVER 2 Pro: Mega adds output and expansion, RIVER fits a lighter sub-800W kit
The short answer
Choose Mega 1 for higher-power appliances and an expandable reserve. RIVER 2 Pro suits a lighter travel kit with loads below 800W.
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 RIVER 2 Pro to 2 hours.
What this is based on
Hours = nominal Wh × 0.8 / 300W. Inputs 1024Wh and 768Wh. 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 RIVER 2 Pro
The 220W solar input is the same ceiling as RIVER 2 Max despite carrying 50% more battery energy.
OUPES Mega 1
- Choose it for
- Need more than 800W continuous output
- Build a larger solar-powered kit
- Main trade-off
- The 36-minute full-charge claim requires AC and solar together.
EcoFlow RIVER 2 Pro
- Choose it for
- Keep the carry under twenty pounds
- Use only modest electronics and appliances
- Main trade-off
- The 220W solar input is the same ceiling as RIVER 2 Max despite carrying 50% more battery energy.
About this comparison
Choose Mega 1 for higher-power appliances and an expandable reserve. RIVER 2 Pro suits a lighter travel kit with loads below 800W.
The bigger unit mainly buys appliance headroom
Winner by situation
Start with what you need it to do
Need more than 800W continuous output
Mega 1 moves from 800W to 2,000W while adding one third more energy. Choose it when the load needs the inverter, rather than expecting proportionate runtime.
- OUPES Mega 1
- Better fit
- EcoFlow RIVER 2 Pro
- Not suitable
Keep the carry under twenty pounds
RIVER 2 Pro weighs 18.2 lb, which meets the under-20-lb constraint. Mega 1 weighs 27.8 lb and exceeds it by 7.8 lb.
- OUPES Mega 1
- Not suitable
- EcoFlow RIVER 2 Pro
- 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 from EcoFlow RIVER 2 Pro. Measure actual wattage before choosing a required overnight reserve.
- OUPES Mega 1
- Depends
- EcoFlow RIVER 2 Pro
- Depends
I want to replenish the battery with solar
The maximum input is 800W for OUPES Mega 1 and 220W for EcoFlow RIVER 2 Pro. Compare your actual panel strings with the voltage and current limits as well as this total.
- OUPES Mega 1
- Depends
- EcoFlow RIVER 2 Pro
- 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 RIVER 2 Pro to 2 hours.
How we reached this conclusion
Hours = nominal Wh × 0.8 / 300W. Inputs 1024Wh and 768Wh. 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 42.2 for EcoFlow RIVER 2 Pro.
How we reached this conclusion
Nominal energy divided by published weight: 1024 / 27.8 and 768 / 18.2. This compares stored energy per lifting weight, not measured efficiency or handle comfort.
The inverter upgrade is much larger than the energy upgrade
Mega 1 provides 2.5 times the continuous output of RIVER 2 Pro, with only one third more nominal battery capacity.
How we reached this conclusion
2000 / 800 = 2.5. 1024 / 768 - 1 = 0.3333.
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, EFR620
RIVER 2 Pro
A 768Wh camping station with 800W continuous AC output and a useful 100W USB-C port. It adds battery reserve without reaching full 1kWh weight.
- Best matched use
- A longer stay with lights, laptops and a car fridge
Checked facts
- 768Wh LFP battery and 800W rated AC output
- About 18.2 lb with 100W USB-C and regulated 12.6V DC output
- 220W solar input, 11–50V at up to 13A, with an advertised 70-minute AC recharge
Meaningful differences
What changes the fit
| What changes | OUPES Mega 1 | EcoFlow RIVER 2 Pro | Why it matters |
|---|---|---|---|
| Nominal battery energy | 1024 Wh | 768 Wh | Stored energy determines the starting runtime budget. |
| Continuous AC output | 2000 W | 800 W | This is the sustained rating used for load screening, separate from surge and boost modes. |
| Lifting weight | 27.8 lb | 18.2 lb | Wheels help on flat ground. A trunk, step or shelf still requires a lift. |
| Maximum solar input | 800 W | 220 W | The panel voltage, current and per-port limits must also fit. |
| Dedicated battery expansion | Supported with compatible equipment | Fixed base capacity | Charging from an external source is different from integrated battery expansion. |
| Published transfer limit | 20 ms | 30 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 RIVER 2 Pro
- This is the 768Wh Pro, not the 716Wh Pro 700. Keep combined steady loads below 800W and check motor startup separately.
What matters in practice
How to make the call
The bigger unit mainly buys appliance headroom
Mega 1 moves from 800W to 2,000W while adding one third more energy. Choose it when the load needs the inverter, rather than expecting proportionate runtime.
Extra solar potential needs a matching array
Mega 1 lists 800W input against 220W. Check panel open-circuit voltage, operating voltage and current before connecting a larger arrangement.
A simple trip can favor the smaller station
RIVER 2 Pro saves 9.6 pounds. For a laptop, lights and a modest fan, that may be more useful than an unused high-power inverter.
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, 150% above EcoFlow RIVER 2 Pro at 800 W.
- OUPES Mega 1
- 2,000 W
- EcoFlow RIVER 2 Pro
- 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 RIVER 2 Pro |
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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
Need more than 800W continuous output
See price & reviews on AmazonEcoFlow RIVER 2 Pro
Keep the carry under twenty pounds
See price & reviews on AmazonLinks open in a new tab.