OUPES

Mega 5

★ 4.5 · LiFePO4 · Released 2024
$2,999
Check Price on Amazon Official OUPES site
OUPES Mega 5
Capacity
5.1 kWh
Output
4,000W
Solar
2200W
Weight
55kg
Value
$0.59/Wh

SunSee Take

The OUPES Mega 5 delivers 5.1 kWh of LiFePO4 storage with 4000W continuous output. At $0.59/Wh it sits in the competitive tier. With 3,500 rated cycles, expect 9+ years of daily use. Best kept stationary — this is a home backup unit. Portability index: 93 Wh/kg.

Pros

  • +5kWh capacity
  • +4000W output
  • +Expandable to 15kWh

Cons

  • −Extremely heavy
  • −Not portable

Best For

Off-Grid Living Home Backup

Full Specifications

Last verified: 2026-07
Battery Capacity 5,120 Wh
Battery Chemistry LiFePO4
AC Output (Continuous) 4,000W
AC Output (Surge/Peak) 8,000W
Max Solar Input 2200W
Weight 55 kg (121.3 lbs)
Cycle Life 3,500 cycles to 80%
AC Charge Time (0→100%) 2h
Price per Wh $0.59
Portability (Wh/kg) 93 Wh/kg
OUPES Mega 5
5.1 kWh · 4000W · LiFePO4
Check Price → Official OUPES site →

How long will the Mega 5 run common devices?

With 5.1 kWh usable, here's roughly what this covers. See full runtime tables:

Refrigerator CPAP Space Heater Starlink All appliances →

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Specifications sourced from OUPES's official product page. MSRP as of 2026-07. Actual prices may vary by retailer and region. SunSee is an independent platform and is not affiliated with OUPES.