

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.


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


Smart APP
Monitor & Control
No need to get up from your comfy sofa - you can operate the Mega 3 at your fingertips.. On OUPES App, you can view and control your power station status, such as real-time input & output, port status, and more. Unique settings help craft your own Mega 3 as you like.
3-Year Warranty
Hassle-Free Service
Experience peace of mind with our industry-leading 3-year warranty. We stand behind the durability and reliability of our products, and we're confident that they will exceed your expectations.

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








FAQs
How to keep this product when it is not used for a long time?
2. Store the battery in a dry and cool environment with a temperature range of 0 ℃ to 40 ℃ (32 ℉ to 104 ℉).
3. Ensure the storage area has a humidity level between 0% and 60%.
4. Avoid exposing the battery to corrosive substances, as they can damage the battery's integrity and performance.
5. Keep the battery away from fire hazards and heat sources to prevent potential damage or overheating.
By adhering to these guidelines, you can help preserve the battery's condition and extend its overall lifespan during extended periods of inactivity.
How long will the early bird sale last?
Can I use third party solar panel?
Actually, we suggest customers to connect OUPES solar panel with OUPES solar generator.
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.