OUPES MEGA 3 Home Backup & Portable Power Station + B2 Extra Battery


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Price: $2,873.00
Regular price
List Price: $3,273.00
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Price: $2,873.00
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Ultra-High Output Power

POWER Almost for Everything!

With an impressive power output of 3600W and a whopping capacity of 3072Wh, the OUPES MEGA 3 is designed to support the continuous operation of 99% of electrical devices. Say goodbye to power interruptions and hello to uninterrupted productivity.

Fast AC and Solar Charging

MAX 3900W Multi-channel Input

Featuring OUPES cutting-edge Multi-Charging Tech, the MEGA 3 delivers unprecedented charging speeds up to 3900W, recharge from 0% to 100% in 1 hour.

Lasts for 10 years

Stable LiFePO4 Battery

MEGA 3 uses an Ev-grade LiFePO4 battery, which can be used for 3500+ cycles at 80% of discharge. Combined with OUPES' advanced battery management system, the MEGA 3 is incredibly safe and durable.

The Ultimate Electricity Cost-Saver

Preferred Choice for Energy Revolution!

Harness the power of the sun with OUPES MEGA 3 and solar panels, maximizing your free energy source. Power your appliances day and night, reducing electricity bills and embracing a greener future. Generate clean energy, save money, and join the renewable energy revolution today!

Leading BMS System

Protect Your Devices From Damage

The BMS Management System has over-voltage protection, over-current protection, and over-heat protection. It adjusts the charging voltage and speed to suit your device's needs.

Pure Sine Wave

100% Security Guarantee 

Experience worry free operation of your sensitive devices as pure sine wave power delivers clean energy without the risk of damage or malfunctions.

3-Year Warranty

Hassle-Free Service

Experience piece of mind with OUPES industry leading 3-year warranty. OUPES stands behind the reliability and durability of the products and confident they will exceed your expectations.

Monitor and Control

Power in Your Hands!

No need to get up from your comfy sofa - you can operate the MEGA 3 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!

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 2, Pro/Tran2 Transfer Switch Kit, and NEMA TT-30P to L14-30R Cord.

Note 1: Please purchase the transfer switch online. OUPES has not launched it quite yet but is expected to in the future!

Note 2: The Transfer Switch installation must be performed by a qualified electrician under the guidance of the installation and operating instructions in compliance with all applicable electrical codes. Only viable with indoor  circuit breaker panels. For questions regarding installation or the Transfer Switch, contact Reliance Controls Customer Service Team Monday through Friday,  8am to 5pm CT at 1-800-634-6155 or visit Reliancecontrols.com

Note 3: Installation Tutorial: https://www.youtube.com/watch?v=tUllMu6tq7E

All-in-One Power Solution

Meets Your Every Need

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.




Capacity: 3072Wh
Battery Chemistry: LFP(LiFePO4)
Cycle Life: 3,500+ cycles to 80% capacity
UPS: 20ms
BMS: Yes


AC Output: 5X120V/3600W(Peak 7000W)
DC Output: 2 ports 12V/10A 120w Max
USB-A: 4 ports QC 3.0. 18W Max
USB-C: 2 ports 5/9/12/15/20V 5A 100W Max
AC TT-30 Output: 120V/3600W
Car Output: 12V/10A 120W Max
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


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


Net Weight: 83.3lb
Dimensions: 25.2*11.9*17.2in
Operating Temperature: 30℉~104℉
Storage Temperature: 30℉~104℉
Certification: UN38.3.MSDs
Warranty: 36 Months

Model: B2 Extra Battery


Capacity: 2048Wh
Battery Chemistry: LFP(LiFePO4)
Cycle Life: 3,500+ cycles to 80% capacity
UPS: 20ms
BMS: Yes


DC 12V& Car lighter Output: 12V/10A
USB-A Output: 5V/3A;9V/2A;12V/1.5A[18W Max]
USB-C Output: 5V/3A;9V/3A;12V/3A;15V/3A;20V/5A[100W Max]
Anderson Output: 12V/30A


PV(Anderson)Input: 12~150Vd.c MPPT:18V-140V15AMax 2100W Max


Net Weight: 41.8lb
Dimensions: 18.1*10.6*10.0in
Operating Temperature: 32℉~104℉
Storage Temperature: 32℉~104℉
Certification: UN38.3.MSDs


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 3 - 36 Months

B2 Extra Battery - 36 Months


OUPES MEGA 3 Home Backup & Portable Power Station User Manual

B2 Multi-functional  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
Quick delivery

Quick delivery and quality power unit. Sleek and lite weight for the amount of power provided.