EcoFlow RIVER 3 Plus
#8 in SmallFull review
A compact LiFePO4 station for camping, laptop work and router/modem UPS duty, with the option to add capacity later.
Amazon $299$299
The EcoFlow RIVER 3 Plus is the better portable power station overall, rated 3.7 to 3.3. The EcoFlow RIVER 3 Plus leads on battery life, charging speed and AC output. The MARBERO M823 wins on value and portability. The MARBERO M823 costs $179.31 less ($119.69 vs $299).
MARBERO M823
#23 in SmallFull review
A very light, low-cost 237Wh station for charging phones, cameras and a CPAP on short trips. Buyers who need longer battery life or laptop-speed USB-C should look at LiFePO4 models.
Amazon $119.69$119.69
Prices were last checked October 24, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the EcoFlow RIVER 3 Plus for battery life (LiFePO4, 3,000 cycles, 5-year warranty vs Lithium-ion, 1-year warranty), charging speed (0-100% on AC in 1 h vs 0-100% on AC in 6 h) and AC output (600 W continuous AC vs 300 W continuous AC).
- Choose the MARBERO M823 for value ($0.51 per rated Wh vs $1.05 per rated Wh) and portability (114 Wh per kg (4.6 lb (2.1 kg)) vs 61 Wh per kg (10.4 lb (4.7 kg))).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every small portable power station; a clear win is highlighted. How we rank explains each one.
| Factor weight | EcoFlow RIVER 3 Plus | MARBERO M823 |
|---|---|---|
| Overall rating | 3.7/5 | 3.3/5 |
| Value 25% | 48 $1.05 per rated Wh | 95 $0.51 per rated Wh |
| Tested capacity 15% | 28 76% of rated capacity delivered (1 test) | 50 not yet independently tested (neutral score used) |
| Battery life 15% | 91 LiFePO4, 3,000 cycles, 5-year warranty | 15 Lithium-ion, 1-year warranty |
| AC output 15% | 83 600 W continuous AC | 41 300 W continuous AC |
| Charging speed 10% | 95 0-100% on AC in 1 h | 0 0-100% on AC in 6 h |
| Portability 10% | 28 61 Wh per kg (10.4 lb (4.7 kg)) | 100 114 Wh per kg (4.6 lb (2.1 kg)) |
| Solar input 5% | 73 220 W max solar input | 50 solar input not published (neutral score used) |
| Features 5% | 100 UPS (10 ms), expandable, 100 W USB-C, app | 0 no UPS, expansion or app |
Independent capacity tests
EcoFlow RIVER 3 Plus
| Tested by | Usable AC energy | Of rated | Conditions |
|---|---|---|---|
| CNET | 218 Wh | 76.2% | 480W load logged with HOBOware; round-trip efficiency 72.41%; recharge from empty 1 h 12 min. |
MARBERO M823
No independent test published yet.
Specifications
| EcoFlow RIVER 3 Plus | MARBERO M823 | |
|---|---|---|
| Battery | ||
| Rated capacity | 286 Wh | 237 Wh |
| Tested usable capacity | 218 Wh (76%) | - |
| Chemistry | LiFePO4 | Lithium-ion |
| Cycle life | 3,000 to 80% | - |
| Expandable | Yes, up to 858 Wh | - |
| Output | ||
| AC output | 600 W (1,200 W surge) | 300 W (375 W surge) |
| Boost mode (resistive loads) | 1,200 W | - |
| AC outlets | 3 total | 2 total |
| 120V 15A outlets (NEMA 5-15R) | 3 | 1 |
| 120V 2-prong outlets (NEMA 1-15R) | - | 1 |
| AC waveform | Pure sine wave | Pure sine wave |
| USB-C ports | 1 (100 W) | 1 (18 W) |
| USB-A ports | 2 | 4 |
| 12 V car outlet | Yes | No |
| DC5521 ports | 0 | - |
| UPS / pass-through | Yes (10 ms switchover) | - |
| Charging | ||
| AC charging | 380 W | - |
| Full AC charge time | 1 h | 6 h ("Fully quick charged in 6hrs" from the wall per the listing; 8 hr from a 12V car socket) |
| Max solar input | 220 W | - |
| Solar input voltage | - | 16.4-24V |
| Car charging | 220 W | - |
| Build | ||
| Weight | 10.4 lb (4.7 kg) | 4.6 lb (2.1 kg) |
| Dimensions | 9.2 x 9.1 x 5.8 in | 8.15 x 5.83 x 3.90 in |
| App | Wi-Fi + Bluetooth | - |
| Warranty | 5 years | 1 years |
| Released | 2025-03 | 2025-10 |