OUPES MEGA 5 Home Backup & Portable Power Station + B5 Extra Battery


Regular price
Price: $4,948.00
Regular price
List Price: $5,798.00
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Price: $4,948.00
You save: $850.00 (15%)
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Expansion Battery

Double the Power Capacity!

MEGA supports capacity expansion to 45.36kWh by connecting multiple expansion batteries. With MEGA 5, you're covered for any situation from tailgate power to extreme blackouts that last for days.

Run Your Home Appliances With 4000W Ultra Power

Using the latest 4000W sine wave inverter developed by OUPES, the power station can support almost any appliance running at full power, from off-grid essentials like microwaves and refrigerators to professional tools like power drills and high-output lights.

< 100W
Phone - 250+ charges 15Wh
CPAP - 100+ Hrs 40W
Laptop - 70+ Hrs 58W
Light - 400+ Hrs 10W
Fan - 70+ Hrs 55W
Refrigerator - 11+ Hrs 360W
Microwave - 6.12+ Hrs 700W
Hair Dryer - 5.3+ Hrs 800W
Toaster - 5.3+ Hrs 800W
Washer - 8.5+ Hrs 500W

Electric Grill - 3.7+ Hrs 1150W
Kettle - 2.8+ Hrs 1500W
Air Conditioner - 2.3+ Hrs 1800W
Air Fryer - 2.8+ Hrs 1500W
Coffee Maker - 4.2+ Hrs 1000W

Plug and Play

Home Backup Power System

Up to 16 output ports for every need. Simply plug in what you want to charge and press the button, limitless power is available to you. The color LCD screen displays the status of the plant, including the fault code, power remaining, port status, etc. 

Lasts for 10 years

Stable LiFePO4 Battery

MEGA 5 uses an EV-grade LiFePO4 battery, which can be used for 3500+ cycles at 80% depth of discharge. Combined with OUPES' advanced battery management system, the MEGA 5 is incredibly safe and durable.

Dual Channel Charging

Multi-channel Charging Tech

MEGA 5 features the OUPES' latest Multi-charging Tech and it can deliver record-breaking speeds at 3900W. At the same time, it is also with equipped EV charging ports, so you can charge at thousands of EV Stations around the US.

Solar Panel - 2100W

120V Wall Outlet - 1800W

EV Charger - 1800W

Generator - 1800W

Car Outlet - 12V

Monitor and Control

Power in Your Hands

No need to get up from your comfy sofa - you can operate MEGA 5 from your mobile phone conveniently. On the OUPES App, you can view and control your power station status, such as real-time input & output, port status, extended battery status, and more!

Fastest Charging Speed

Fully charge in 1.3 hours

Multi-channel charging tech provides more possibilities for further speeding up the charging speed. You can choose the charging methods you want according to your conditions. Even without a multi-channel charge, you can still fully charge your MEGA 5 in 2.8 hours.

EV CHARGING + SOLAR PANELS MEGA 5 = 1.3 hours at 3900W

AC + SOLAR CHARGING MEGA 5 = 1.3 hours at 3900W

SOLAR CHARGING MEGA 5 = 2.4 hours at 2100W

AC/EV CHARGING MEGA 5 = 2.8 hours at 1800W

AC/EV CHARGING + EXTRA BATTERY MEGA 5 = 5.6 hours at 1800W

Embrace the Quiet

Immerse yourself in nature's calmness with our product's minimal noise output, allowing you to savor the serenity.

Integration with Home Circuits

Building up your home backup system to keep your essential circuits running when a blackout hits. Ensure peace of mind with the easily integrated whole-home backup kit: OUPES MEGA 5, Pro/Tran 2 Transfer Switch Kit and NEMA TT-30P to L14-30R Cord.




Capacity: 5040Wh
Battery Chemistry: LFP(LiFePO4)
Cycle Life: 3,500+ cycles to 80% capacity
UPS: ≤20ms
BMS: Yes


AC Output: 5X120V/4000W
DC Output: 2X5.5mm DC Output
USB-A: 4 X QC3.0 18W Max
USB-C: 2XPD 60W.PD 60W Max
AC TT-30 Output: 120V/4000W
Car Output: 12V/10A
Anderson Output: 12V/30A


Fast AC Charge Input: 100~120Va.c 16A Max 1800W Max
Slow AC Charge Input: 100~120Va.c 16A Max 900W Max
Solar Input: 12~150Vd.c 15A Max 2100W Max
EV Charging: 100~120Va.c 16A Max


Connectivity: Bluetooth, Wifi
App Control: Yes
Amazon Alexa & Google Asistant: Yes


Net Weight: 110.23lbs
Dimensions: 25.2*11.9*17.2in
Operating Temperature: 30℉~104℉
Storage Temperature: 30℉~104℉
Certification: UN38.3.MSDs
Warranty: 36 Months

Model: B5 Extra Battery


Capacity: 5040Wh
Battery Chemistry: LFP(LiFePO4)
Cycle Life: 3,500+ cycles to 80% capacity
UPS: 20ms
BMS: Yes


Net Weight: 96.67lbs
Dimensions: 25.2*11.9*17.2in
Operating Temperature: 32℉~104℉
Storage Temperature: 32℉~104℉
Certification: UN38.3.MSDs
Warranty: 36 Months


1. Can I use a third party solar panel?

Most of the solar panels on the market are compatible, but you need to check whether the specifications and plug are matched (Within 150V, and the connection port is Anderson), you also can feel free to contact us via email before connecting them.

Actually, we suggest customers connect the OUPES solar panel with the OUPES solar generator, as there is already a solution provided in the generator and also the third-party solar panel.

Different companies' solutions may conflict, causing charging not to be done as efficiently as desired although they are universal.

2. Can I use a third party expanded battery?

No, the MEGA 3 can't be expanded with a third party battery. Please choose the OUPES B2 expanded battery with it.

3. How do I know if the MEGA 3 can power my device?

The OUPES MEGA 3 can run any device that requires less than 150V and 3600W. You can calculate the charge time using the following formula: 3072Wh* 0.85 / operating power of your device.

4. What type of battery does OUPES use?

LiFePO4 - The Battery is estimated to have over 80% of your original capacity after 3500 cycles, with a gradual reduction after that. (Note: this doesn't mean the battery only has a 3500 cycle life span. It means that up until 3500 cycles, the unit can perform at its best. However, due to battery degradation there will be a gradual decline in performance after 3500 cycles.) 

It has a 6 times longer lifespan than ordinary lithium batteries. LiFePO4 battery is much safer, more stable and more eco-friendly with no heavy metal elements that are harmful to people.

5. Does it support pass-through charging?

Yes, the OUPES MEGA 3 supports pass-through charging without damaging the battery.

6. Is it waterproof? Is it fireproof?

OUPES Mega 3 is not waterproof. Please make sure to shelter it from rain. The outer case of our products is made of fireproof material UL 94-V0.

7. Does the OUPES MEGA 3 package come with all the charging cables?

Yes, the OUPES MEGA 3 package will come with all the charging cables, you don't need to purchase any extra cables.

8. Is the solar panel waterproof? Can I use an extension cable?

We have waterproof treatment for solar panels, but we do not recommend you use them in the rain. Portable solar panels cannot be fully waterproofed like hard solar panels. Long-term exposure to rain may reduce cell efficiency. The length of the solar charging cable is 16ft long. We also provide the extensions on the website. Please note that the charging efficiency may be reduced due to the charging cable being prolonged. It might require more time to finish charging with extension cables.


MEGA 5 - 36 Months

B5 Extra Battery - 36 Months


OUPES MEGA 5 Home Backup & Portable Power Station User Manual

OUPES B5 Extra Battery User Manual


Order Confirmation

As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your choice of payment for the purchase.

If your item happens to be on back-order or unavailable, we will void the pre-authorization and reach out to you via e-mail. If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

Order Shipment

Your order will ship within 5 business days. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out. You should receive your item(s) between 5-10 business days.

We offer free shipping on all orders within the contiguous United States via FED EX, UPS, DHL and USPS.

No shipping outside the contiguous United States

If you have any questions feel free to give us a call or email us at support@portablesolarpros.com. 


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Customer Reviews

Based on 1 review
Timely manner

Everything was completed in a timely manner. I will be adding to my expandable program this year.