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  • MEGA 3 + B2 Extra Battery
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    OUPES Mega 3 & B2 Extra Battery

    OUPES Mega 3 & B2 Extra Battery

    • 3072Wh Capacity | 3600W AC Pure Sine Wave Inverter (7000W Surge)
    • Fully recharge in 1 hour with 3900W Max. Input (AC+solar)
    • Expandable Up to 15.36kWh with B2 * 6
    • Seamless UPS Backup (2200W Max)
    • Adjustable Recharge (900W-1800W AC input)
    • LiFePO4 Battery with 3,500+ Life Cycles to 80%
    • 16 Outputs For Multiple Devices
    • Smart Control & Monitor in OUPES App
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    Regular price $2,873.00
    Sale price $2,873.00 Regular price $3,273.00
    Tax included.
    You Could Apply for a 30% Tax Credit*
    When installing solar system as a Home Power Solution.
    5% of sales will be donated to
    the OUPES help project to help those in need.
    View full details
    OUPES Mega 3 & B2 Extra Battery
    Fast shipping
    30-Days Money Back
    36-Months Warranty
    Lifetime customer support
    Expansion Battery

    Achieve Genuine Energy Independence

    Capture and store solar energy. Mega3&B2 Energy Storage System supports capacity expansion to 15.36kWh by connecting B2 battery * 6. ensures uninterrupted appliance performance, offsets peak costs, prepares for outages.
    Ultra-high Output Power

    Power Almost for Everything

    With an impressive power output of 3600W and a whopping capacity of 3072Wh, the OUPES Mega3 is designed to support the continuous operation of 99% of electrical appliances. 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 Mega3 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 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 3 is incredibly safe and durable.
    LFP Battery Charge Cycles
    Maintain good health for at least
    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 battery 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

    3-Year Warranty

    Hassle-Free Service

    Monitor and Control

    Power in Your Hands

    No need to get up from your comfy sofa - you can operate Mega 3 from your mobile phone conveniently. On 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

    Build up your home backup system to keep your essentials circuits running when a blackout hits. Ensure peace of mind with the easily integrated whole-home backup kit: OUPES Mega 3, Pro/Tran 2® Transfer Switch Kit, and NEMA TT-30P to L14-30R Cord.
    *Note1: Please purchase the transfer switch online, it hasn't launched on OUPES yet, let's expect them in the future!

    *Note2: 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.

    *Note3: 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

    Pinball Preparedness:"I really can't find any faults with this product. It's clear that a lot of thought and engineering has gone into the Mega3."


    Battery Chemistry
    Cycle Life
    3,500+ cycles to 80% capacity
    AC Output
    5X120V/3600W(Peak 7000W)
    DC Output
    2 ports 12V/10A 120w Max
    4 ports QC 3.0. 18W Max
    2 ports 5/9/12/15/20V 5A 100W Max
    AC TT-30 Output
    Car Output
    12V/10A 120W Max
    Anderson Output
    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
    Smart Control
    Bluetooth, Wifi
    App Control
    Amazon Alexa & Google Asistant
    Net Weight
    Operating Temperature
    Storage Temperature
    36 Months

    OUPES 240W Solar Panel

    Rated Power
    Connector Type
    7909 DC Connector
    Open Circuit Voltage
    Short Circuit Current
    Maximum Operating Voltage
    Maximum Operating Current
    Cell Type
    Monocrystalline Silicon
    Unfolded Dimensions
    Folded Dimensions
    Operating Temperature
    -20°C~85°C/ -4℉ to 185℉
    12 Months

    In the Box(MEGA 3)

    1* Mega 3 Portable Power Station
    1* AC Charging Cable
    1* Anderson to Anderson Cable
    1* Anderson to Car Charging Cable
    1* Anderson to 7909 Charging Cable
    1* Anderson to MC4 Cable
    1* Warranty Card
    1* User Manual

    Solar Panel(Depends on your option)

    240W Solar Panel
    1 * User Manual
    1 * Warranty Card
    7909 & MC4 Charging Cable


    Can I use 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.

    Can I use a third party expanded battery?

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

    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.

    What types 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 6 times of 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.

    Does it support pass-through charging?

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

    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.

    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.

    Do you charge tax/shipping fee?

    We provide no tax charge and free shipping service in the continental United States. The prices on our website will deliver the product to your door

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

    We have waterproof treatment for solar panels, but I 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.