EcoFlow RIVER 3 vs UDPOWER C400
Comparing EcoFlow RIVER 3 vs UDPOWER C400: EcoFlow RIVER 3 scores 8.2/10 and UDPOWER C400 scores 8.4/10 in our benchmark testing. UDPOWER C400 wins overall — UDPOWER C400 scores higher on power and features while EcoFlow RIVER 3 offers better value.
EcoFlow RIVER 3 (245Wh) vs UDPOWER C400 (256Wh) compared spec-by-spec. Real-world testing, pricing, pros, cons, and our verdict on which power station to buy.
| Specification | ||
|---|---|---|
| Capacity | 245Wh | 256Wh ✓ Winner |
| AC Output | 300W | 400W ✓ Winner |
| Surge Output | 600W | 800W ✓ Winner |
| Weight | 7.8 lbs | 6.88 lbs ✓ Winner |
| Dimensions | 10 x 8.3 x 4.4 in | 8.3 x 5.1 x 7.1 in |
| Battery Type | LiFePO4 | LiFePO4 |
| Cycle Life | 3,000 cycles | 4,000 cycles ✓ Winner |
| AC Charge Time | 60 min | 90 min (0-80%) |
| Max Solar Input | 110W | 150W ✓ Winner |
| AC Outlets | 2 | 2 |
| USB-C Ports | 1 | 2 ✓ Winner |
| USB-A Ports | 2 ✓ Winner | 1 |
| DC Outlets | 1 | 3 ✓ Winner |
| Expandable | No | No |
| Operating Temp | 32-113F | 32-104F |
| Warranty | 5 years | 5 years |
| App Control | Yes | No |
Buy the EcoFlow RIVER 3
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Buy the UDPOWER C400
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Who Should Buy the EcoFlow RIVER 3?
The EcoFlow RIVER 3 is the right choice for under 2000, under 1000, under 500. With 245Wh of capacity and 300W continuous output, it delivers serious power for demanding loads.
Key advantages include: ultra-lightweight at just 7.8 lbs — true grab-and-go portability; lifepo4 battery with 3,000 cycle lifespan; full ac charge in 60 minutes. At 7.8 lbs, it's genuinely portable.
Priced at $199 (MSRP $239), the EcoFlow RIVER 3 scores 8.2/10 overall in our benchmark testing — making it a strong performer for most users.
Who Should Buy the UDPOWER C400?
The UDPOWER C400 is the right choice for under 1000, car camping, tailgating. With 256Wh of capacity and 400W continuous output, it delivers serious power for demanding loads.
Key advantages include: vehicle jump-start capable (400a ec5 port) — rare at this capacity tier; 4,000+ cycle lifepo4 at $170-240; two ac outlets at 256wh; competitors usually offer one. At 6.88 lbs, it's genuinely portable.
Priced at $200 (MSRP $300), the UDPOWER C400 scores 8.4/10 overall in our benchmark testing — making it a strong performer for most users.
How Do the Specs Compare?
Capacity: The UDPOWER C400 leads on storage with 256Wh versus 245Wh for the EcoFlow RIVER 3 — a 4% difference that matters most for overnight or multi-day use cases.
Output: The UDPOWER C400 delivers more continuous power at 400W vs 300W, which determines what appliances you can run simultaneously — things like air conditioners, microwaves, and power tools that demand 1,000W or more.
Portability: The UDPOWER C400 is lighter at 6.88 lbs vs 7.8 lbs for the EcoFlow RIVER 3. The weight difference is minimal and unlikely to be a deciding factor.
Price: The EcoFlow RIVER 3 costs $199 while the UDPOWER C400 runs $200 — a $1 gap. At this price parity, specs and build quality become the primary tiebreakers.
Battery longevity: The UDPOWER C400 is rated for 4,000 cycles versus 3,000 — at one cycle per day, that's 11 vs 8 years of daily use.
🏆 Our Verdict
Choose the EcoFlow RIVER 3 if you need a more portable solution at 7.8 lbs and strong performance for its class.
Choose the UDPOWER C400 if you prioritize premium features and build quality , portability (6.88 lbs vs 7.8 lbs) .
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