OUPESPower stationLiFePO4
OUPES Mega 5
5,040Wh LiFePO4. 4,000W continuous, 7,000W surge. Lower-priced higher-capacity entry.
Capacity
5,040 Wh
AC output
4,000 W
Surge
7,000 W
duration not stated
Solar input
1,200 W
Cycle life
3,500
Weight
100 lb
Warranty
5 yr
Best price [OUT OF STOCK]
Updated 4h ago
$3,499$3,799
Out of stock at every retailer we track. The price shown is the most recent observed at the cheapest retailer; we'll surface fresh pricing as soon as any retailer restocks.
via OUPES Direct · ships free
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1 other retailer carry this
Price history · 90 days
OUPES Direct
Amazon
OUPES Direct
$3,499
Amazon
$1,849
90-day low
$1,399 (2026-05-03)
Sale-window patterns arrive after we accumulate ≥6 months of price history. Set a price alert to catch flash dips below the 90-day low — we email you the moment it hits.
What reviewers said about this exact unit
5 sources · linked & timestampedWe don't review power stations ourselves. We aggregate verbatim quotes from trusted reviewers, link to the source video with timestamps, and flag where they disagree.
TH
The Solar Labestablished tier★ Verifiedtop pick
OUPES Mega 5: Big Battery, Small Inverter - Who Is This For?“if you're okay with the fact that this only does 120 it's a really good unit if you have like an RV or a small tiny home or something like that where you're just trying to power the Essentials you only need 120 volts”Open at 2:44
TH
The Solar Labestablished tier★ Verifiedranked
OUPES Mega 5: Big Battery, Small Inverter - Who Is This For?“right now it's hard for any company to compete with the Dual pekron e36s with the 240 volt box we just made a video on this thing it's a super capable system and it's honestly really cheap right now for like two or $300 more than this unit”Open at 4:47
TH
The Solar Labestablished tier★ Verifiedcaution noted
OUPES Mega 5: Big Battery, Small Inverter - Who Is This For?“compared to other power stations with this size battery bank or a similar size battery Bank the inverter is quite small a lot of the other competition sure they also do 240 volts but you can run like the Delta Pro Ultra has a 7,200 W inverter”Open at 5:30
TH
The Solar Labestablished tier★ Verifiedcaution noted
OUPES Mega 5: Big Battery, Small Inverter - Who Is This For?“probably the most disappointing thing about the mega five is that the EV charger is only meant for a stage one charger it's 120 volt input at 16 amps Max what that means is you can plug your EV charger into here with the little regular one that's 120 volt wall plug that charges your car in like 17 days”Open at 6:02
TH
The Solar Labestablished tier★ Verifiedranked
OUPES Mega 5: Big Battery, Small Inverter - Who Is This For?“at the end of the day we would recommend this unit if you just need 120 volts it's great for that if you need 240 volts we would recommend the pekron combo all day”Open at 7:04
Runtime predictions for your loads
Based on 5,040 Wh capacity · 95% LiFePO4 DoD · 90% AC inverter efficiency. Solar column assumes ~25% of rated input as sustained sun average. Phase-1 uses constant-load math; time-resolved multi-day SOC simulation is the Phase-2 north star.
| Load profile | Continuous draw | Runtime estimate |
|---|---|---|
| CPAP only (overnight) | 60W | 3.0 days |
| Fridge only (cycle-averaged) | 70W | 2.6 days |
| Wifi router + LED lights | 55W | 3.3 days |
| Your full continuous load (215W) | 215W | 20.0 hr |
| Microwave + base load (peak) | 1300W | 3.3 hr |
| Window AC 8,000 BTU (avg) | 700W | 6.2 hr |
Detailed specs
Sourced from manufacturer datasheet · verified 1mo agoFor advanced shoppers. Plug types matter if you have a 30A RV; MPPT range matters if you plan custom solar arrays.
Battery behavior
| Cell chemistry | LiFePO4 |
| Cycle life @ 80% capacity | 3,500 |
| Parasitic loss (idle, AC off) | pending verification |
Why parasitic loss matters: for store-and-forget hurricane prep, even ~2W idle drain adds up — a fully charged unit can drain in months sitting in a closet.
Inputs
Solar — Solar InputANDERSON
12–145V · 10A max · 1200W max
Outputs — single unit
AC outlets (120V)
- NEMA 5 20R × 4120V 20A
Pure sine wave · 4,000W combined AC continuous (shared budget across all AC outputs)
USB
- USB C PD × 2100W
- USB A × 2
DC
- car outlet12V
- anderson12V
How OUPES Mega 5 compares to alternatives
OUPES Mega 5 specs verified from the manufacturer's datasheet. Alternatives marked “pending verify” haven't been through the verification pipeline yet.
Capacity
OUPES Mega 55,040 Wh
EcoFlow RIVER 2 Pro768 Wh
Bluetti Apex 3002,765 Wh
AC continuous
OUPES Mega 54,000 W
EcoFlow RIVER 2 Pro800 W
Bluetti Apex 3003,840 W
Surge
OUPES Mega 57,000 W
EcoFlow RIVER 2 Pro1,600 W
Bluetti Apex 3007,680 W
Cycle life
OUPES Mega 53,500
EcoFlow RIVER 2 Pro3,000
Bluetti Apex 3006,000
Solar input
OUPES Mega 51,200 W
EcoFlow RIVER 2 Pro220 W
Bluetti Apex 3002,400 W
Native 240V
OUPES Mega 5—
EcoFlow RIVER 2 Pro—
Bluetti Apex 300no — requires Hub A1 for parallel connection
Max system
OUPES Mega 5—
EcoFlow RIVER 2 Pro—
Bluetti Apex 30019,354 Wh
Weight
OUPES Mega 5100 lb
EcoFlow RIVER 2 Pro18.2 lb
Bluetti Apex 30083.8 lb
Best price now
OUPES Mega 5$3,499
EcoFlow RIVER 2 Pro$499
Bluetti Apex 300$1,499
Wh per dollar
OUPES Mega 51.44
EcoFlow RIVER 2 Pro1.54
Bluetti Apex 3001.84
| Metric | OUPES Mega 5 | EcoFlow RIVER 2 Pro | Bluetti Apex 300 |
|---|---|---|---|
| Capacity | 5,040 Wh | 768 Wh | 2,765 Wh |
| AC continuous | 4,000 W | 800 W | 3,840 W |
| Surge | 7,000 W | 1,600 W | 7,680 W |
| Cycle life | 3,500 | 3,000 | 6,000 |
| Solar input | 1,200 W | 220 W | 2,400 W |
| Native 240V | — | — | no — requires Hub A1 for parallel connection |
| Max system | — | — | 19,354 Wh |
| Weight | 100 lb | 18.2 lb | 83.8 lb |
| Best price now | $3,499 | $499 | $1,499 |
| Wh per dollar | 1.44 | 1.54 | 1.84 |
Output ports comparison
How many of each plug-type does each unit have? Match against your real loads — TT-30R if you have a 30A RV, L14-30R if you want a transfer switch, USB-C PD if you charge laptops.
120V AC outlets
Standard 15A outlet
NEMA 5-15R
OUPES Mega 5—
EcoFlow RIVER 2 Pro×4
Bluetti Apex 300×2
20A T-slot household
NEMA 5-20R
OUPES Mega 5×4
EcoFlow RIVER 2 Pro—
Bluetti Apex 300—
| Plug | OUPES Mega 5 | EcoFlow RIVER 2 Pro | Bluetti Apex 300 |
|---|---|---|---|
Standard 15A outlet NEMA 5-15R | — | ×4 | ×2 |
20A T-slot household NEMA 5-20R | ×4 | — | — |
USB
USB-A
USB-A (Type A)
OUPES Mega 5×2
EcoFlow RIVER 2 Pro×3
Bluetti Apex 300×2
USB-C PD
USB-C Power Delivery
OUPES Mega 5×2
EcoFlow RIVER 2 Pro—
Bluetti Apex 300—
| Plug | OUPES Mega 5 | EcoFlow RIVER 2 Pro | Bluetti Apex 300 |
|---|---|---|---|
USB-A USB-A (Type A) | ×2 | ×3 | ×2 |
USB-C PD USB-C Power Delivery | ×2 | — | — |
Low-voltage DC
12V cigarette / car
12V DC cigarette socket
OUPES Mega 5×1
EcoFlow RIVER 2 Pro×1
Bluetti Apex 300×2
| Plug | OUPES Mega 5 | EcoFlow RIVER 2 Pro | Bluetti Apex 300 |
|---|---|---|---|
12V cigarette / car 12V DC cigarette socket | ×1 | ×1 | ×2 |
Solar / high-current DC
Anderson PowerPole
Anderson PowerPole
OUPES Mega 5×1
EcoFlow RIVER 2 Pro—
Bluetti Apex 300—
| Plug | OUPES Mega 5 | EcoFlow RIVER 2 Pro | Bluetti Apex 300 |
|---|---|---|---|
Anderson PowerPole Anderson PowerPole | ×1 | — | — |
Counts are output-direction only. Charging cables (input ports) live in the Detailed specs section above.