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OUPES

OUPES B5 Smart Extra Battery - 5040Wh LiFePO4 Expansion Battery for Mega 5 Portable Power Station Scalable to

4.2

$2,248.50

About this item

  • Expand Your Power – Add 5040Wh LiFePO4 capacity to OUPES Mega 5, scaling total power up to 45.36kWh with 8 B5 batteries.
  • Ultimate Backup Solution – Keep homes, appliances, and devices running during blackouts, storms, or off-grid adventures.
  • Military-Grade Durability – Rugged LiFePO4 battery with 3-year warranty, engineered for extreme temperatures and long lifespans.
  • Effortless Portability – Compact 25.2"x11.9"x17.2" design at 97 lbs – easy to transport for camping, RV trips, or outdoor events.
  • Professional-Grade Support – Powers cameras, drones, and high-wattage gear for photographers, filmmakers, and field crews.
  • Seamless Integration – Plug-and-play connectivity with Mega 5 host for instant capacity boost (sold separately).
  • Safe & Reliable – Advanced BMS protects against overcharging, short circuits, and overheating for worry-free use.
  • Eco-Friendly Energy – Clean, silent power for off-grid living, replacing noisy gas generators.
  • Never Run Out of Power Again Imagine a hurricane approaching, your family huddled at home – and your lights, fridge, and medical devices stay on. Or picture a remote photoshoot where your drone and cameras run nonstop for hours. The OUPES B5 Smart Extra Battery makes this possible. Why Choose the B5? 1.Massive Scalability : Stack up to 8 B5 units with your Mega 5 host for 45.36kWh – enough to power a home for days. LiFePO4 Superiority : Safer, lighter, and longer-lasting than lead-acid or lithium-ion, with 3,500+ cycles. 2.Built for Real Life : IP67-rated ruggedness handles rain, dust, and drops – perfect for camping, construction sites, or emergencies. Your Power, Your Way Whether you’re a homeowner preparing for disasters, a filmmaker capturing remote landscapes, or a vanlifer exploring the open road, the B5 delivers uninterrupted energy. Its compact Expand Your Power – Add 5040Wh LiFePO4 capacity to OUPES Mega 5, scaling total power up to 45.36kWh with 8 B5 batteries.; Ultimate Backup Solution – Keep homes, appliances, and devices running during blackouts, storms, or off-grid adventures.; Military-Grade Durability – Rugged LiFePO4 battery with 3-year warranty, engineered for ext
Specification

Product facts

Key details

material
‎Plastic
color_spec
‎Black
Brand
OUPES
Wattage
5040 Watt-hours
Fuel Type
Battery

Dimensions and fit

dimensions
‎25.2"L x 11.9"W x 17.2"H
weight
‎97 pounds
Item Weight
97 Pounds
item_weight
97 pounds
product_dimensions
25.2"L x 11.9"W x 17.2"H

Technical specifications

Power Source
Battery Powered
Voltage
120 Volts (AC)
power_source
Battery Powered
model_name
B5 Smart Extra Battery
total_power_outlets
3
item_model_number
S5

Item information

Recommended Uses For Product
Backup power, Blackout, Off-grid power
Output Wattage
5040
Special Feature
Scalable to 45.36kWh, Smart APP Control
Included Components
1x B5 Smart Extra Battery, 1x Extra Battery Cable, 1x User Manual
fuel_type
Battery
recommended_uses_for_product
Backup power, Blackout, Off-grid power
output_wattage
5040
special_feature
Scalable to 45.36kWh, Smart APP Control
included_components
1x B5 Smart Extra Battery, 1x Extra Battery Cable, 1x User Manual
color
Black
eu_spare_part_availability_duration
5 Years
starting_wattage
5040 Watts
manufacturer
SHENZHEN WEI PENG SHIJI TECHNOLOGY CO., LTD
part_number
S5
style
B5 Extra Battery
special_features
Scalable to 45.36kWh, Smart APP Control
warranty_description
5-year warranty
best_sellers_rank
#174,357 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #564 in Outdoor Generators
date_first_available
March 26, 2025
Overview

About this item

  • Expand Your Power – Add 5040Wh LiFePO4 capacity to OUPES Mega 5, scaling total power up to 45.36kWh with 8 B5 batteries.
  • Ultimate Backup Solution – Keep homes, appliances, and devices running during blackouts, storms, or off-grid adventures.
  • Military-Grade Durability – Rugged LiFePO4 battery with 3-year warranty, engineered for extreme temperatures and long lifespans.
  • Effortless Portability – Compact 25.2"x11.9"x17.2" design at 97 lbs – easy to transport for camping, RV trips, or outdoor events.
  • Professional-Grade Support – Powers cameras, drones, and high-wattage gear for photographers, filmmakers, and field crews.
  • Seamless Integration – Plug-and-play connectivity with Mega 5 host for instant capacity boost (sold separately).
  • Safe & Reliable – Advanced BMS protects against overcharging, short circuits, and overheating for worry-free use.
  • Eco-Friendly Energy – Clean, silent power for off-grid living, replacing noisy gas generators.
  • Never Run Out of Power Again Imagine a hurricane approaching, your family huddled at home – and your lights, fridge, and medical devices stay on. Or picture a remote photoshoot where your drone and cameras run nonstop for hours. The OUPES B5 Smart Extra Battery makes this possible. Why Choose the B5? 1.Massive Scalability : Stack up to 8 B5 units with your Mega 5 host for 45.36kWh – enough to power a home for days. LiFePO4 Superiority : Safer, lighter, and longer-lasting than lead-acid or lithium-ion, with 3,500+ cycles. 2.Built for Real Life : IP67-rated ruggedness handles rain, dust, and drops – perfect for camping, construction sites, or emergencies. Your Power, Your Way Whether you’re a homeowner preparing for disasters, a filmmaker capturing remote landscapes, or a vanlifer exploring the open road, the B5 delivers uninterrupted energy. Its compact Expand Your Power – Add 5040Wh LiFePO4 capacity to OUPES Mega 5, scaling total power up to 45.36kWh with 8 B5 batteries.; Ultimate Backup Solution – Keep homes, appliances, and devices running during blackouts, storms, or off-grid adventures.; Military-Grade Durability – Rugged LiFePO4 battery with 3-year warranty, engineered for ext

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Customer reviews

8 reviewsPositive

Rated 4.2/5 across 8 reviews — well received overall.

  • 25% of sampled reviews rate 2 stars or below.

Customers say

Customers find the battery's power generation capabilities positive, with one mentioning it works perfectly with solar panels.

Generated from the text of customer reviews

★★★★★

Reliable battery

Oupes is a reliable and reputable company. They provide many solar options and, generally, for a good price. This item is an extra battery that connects to the main battery and acts as an expansion. It comes with the appropriate cord that easily connects to the main unit. The main unit, often referred to as a generator, is not a generator. It generates no power. It is a battery-stores solar energy (much like a Duracell or Energizer battery stored power for later use). This extra battery multiples your storage significantly. If you own any Oupes Mega series unit, this battery is compatible. If you don’t own one, I strongly recommend getting one! When you order your main unit and extra battery, grab some solar panels (Oupes does offer combo purchases) and an extension cord. Properly set up, the units charge fast. Oupes provides excellent support and even produces YouTube videos for additional information and support. Enjoy! Read more

Customer
★★★★★

This is already saving me mney

The battery works great, I bought the MEGA1 a few months ago and it saved me lots. I live off-grid and now I only need to run my generator once a day with the addition of the B3 battery. Read more

Kraig R. Adamson
★★★★☆

Recommend

We bought this to start building our solar system for our house. So far it has been excellent. Can't wait to see the reduction in electric use. I gave a 4 star because the main system had issues and we had to return it to the manufacturer, but they responded quickly and are replacing it. Read more

Grace
★★★★★

reliable

Wonderful product! We use it for the farmers market and its wonderful! Read more

Design & Remodel Brothers
★★☆☆☆

Overstated capacity

No where near the listed watt hours Read more

George Joachim
★★★★★

Que es muy buena

Excelente Read more

Rogelio Carnet Prado
★☆☆☆☆

not Right For My Company.

After 2 weeks of buying a Mega 1 it died. Nothing we tried could get it to work, and unfortunately our business relies on solar generators. If one breaks our operations close down. I bought this new model with such excitement— but in a short time it was tossed out because it didn’t work. I tried to work with OUPES, but it was as Amazon that came to the rescue. Read more

Rob H.
★★★★☆

must buy

must buy Read more

Derrick Jones

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