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Bluetti EB40 400Wh/300W

369.99 369.99

  • Capacity:400Wh/36Ah@11.1V lithium-ion rechargeable battery
  • Batterycell:Built in Samsung lithium ion battery cell-Samsung INR18650-29E.
  • Load Capacity: Continuous Max.400W for AC output,peak 600W, overload capacity:100-150%@2min; >150%@10S
  • Multi-use&Various Outputs: 2*AC Output for small appliance under 300W,1*DC12V/5A,1*DC12V/10A,1*Car jump starter socket,1*QC3.0 18W(Max),6*5V3.5A(Max) USB
  • RechargedbyAC/Solar/Car.MPPT solar charge mode, and Pure sine wave for AC.
  • LCD display indicate the remaining capacity, charge, discharge and failure status.
  • Widely used for indoor or outdoor such as family, office, travel, camping, etc.
  • 12-Month Warranty.

Bluetti EB40 400Wh/300W

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Main features:

Portable Solar Generator Make Your Life More Convenient for Different Power Needs

Every familyshould consider having a portable generator because they can be a great backup for a variety of situations where electricity options are limited.

  • Power Outages
  • Medical Emergencie
  • Camping/RV/Vanlife/adventure

This Portable Power Generator is Designed for Small Appliance (below 300W) Power Needs for example When you are Away from a AC Wall Outlet or in trouble of unexpected blackout or power outage.

  • Silent Green Backup Power

    Silent Green Backup Power

    It is a silent and zero-omission portable power station.perfectforemergency backup power especially for children and elder people, CPAP user who suffer from sleep trouble. We built in Samsung lithium-ion battery cell, stable, reliable and eco-friendly.

  • MPPT solar Charge

    MPPT solar Charge

    We built in MPPT inverter(MPPT efficiency is 99.5%)-it can automatic tracking to adapt to the max. charging power of solar panels, effectively improve the charging efficiency of PV solar panels, shorten the charging time of solar panels) Tips: pls choose the compatible solar panel with OCV:12.6-40v/Max.10A,Max.120W.

  • 300W Pure Sine Wave AC Output

    300W Pure Sine Wave AC Output

    2*AC110V Continuous 300W, 600W surge pure-sine wave.it supplies the backup power sources with max.400wh capacity for home use and outdoor activities.it can power up small appliance with no more than 300W such as Laptop, CPAP,camera, display monitors, led lights, fans, routers,etc.

  • What device can not power

    What device can not power

    Some device like Electric drill,Electric heater, Hair drier, Electric Kettle,Refrigerator. such device's Instant starting peak power is very high, it will cause our power station overload protection and show error code on the screen.

  • Type-C & USB Quick Charge 3.0

    Type-C & USB Quick Charge 3.0

    It features a QC3.0 USB-C port so you can charge your Type-C devices such as smartphone, tablet, and laptop with USB-C port. Besides USB-C, it also has 6*5V3.5A(Max)Port for traditional USB-A devices.

  • What you can get

    What you can get

    1 * Portable Power Storage(EB40), 1 * AC wall charger, 1 * car charger,1 * 12V/10A output to car charging cable, 1 * solar charging cable, 1 * jump starter alligator clip cable,1 * Type-c cable, 1 * user manual, 1 * warranty card.

Frequently Asked Questions

  • What devices can EB40 power?

    It can charge small house hold appliances Max. 300W, Load Capacity: Continuous Max.400W for AC output,peak 600W, overload capacity:100-150%@2min; >150%@10S.

    The EB40 will show error code(E*) on the LCD screen if your device exceed max.300W.

    Please refer to your device specification before purchase.

  • What is battery cell used in EB40?

    Built in High Quality Samsung Polymer Lithium-ion Battery Cell.

    It is Automotive-level Battery Cell,more stable, higher safety, higher discharge rate,low heat

  • What is the life span of this EB40?

    Longer cycle life 1000+.

  • How do you know if your portable power supply is charged?

    To check the charging state of your portable power supply,refer to the LCD Battery Display.When lit up,you will see a battery outline with five segments,indicating the current charge level.You can turn on the Battery Display by pressing the Master Power Button.It is OK to use the portable power station even when it’s not fully charged.

  • How do you know if your device will work with this product?

    First,you need to determine the amount of power your device requires.This may require some research by yourself,examining the user guide for your device should suffice. Second,you will need to check the capacity for the individual output ports.Forexample,the AC port is monitored by an inverter that allows for 300W of continuous power.This means if your device is a pulling more than 300W for an extended period of time,the portable power supply will shut off. 

  • How to know the working times for my device?

    Working time =400Wh* 0.85 / operating power of your device.

    For example, if power consumption of your device is 30W (may be a 40’’ TV), working time: 400wh*0.85/30w=11hrs (rough calculated) .

    Please note: actual power consumption varies from different usages, pls consult MAXOAK for better purchase decision.

  • What solar panel should I use for this EB40?

    Solar panel must meets:

    1) OCV(open circuit voltage):DC12.6-40V max.125W;

    2)MC4 Connector

  • Can I Charge the Power Station with Two Solar Panel in Series?

    Yes, you can. But make sure the total open circuit voltage (OCV) is no more than 40V. otherwise it may power off automatically or cause damage.

  • Input port/recharge port?

    Our AC/SUN/Car recharge port use the same input port, size: 6.5*3.0mm (DC socket)

  • Can charge and discharge at the same time?

    Yes, it supports pass through function.

  • Can I take it on plane?

    No, can not, not TSA-approved,because its capacity is 400wh which exceed the max.100 required.

  • Can it power CPAP?

    Yes, can charge CPAP, we suggest turn off humidifier/heater and set a lower pressure to prolong the charge time.

  • How long should I recharge it if I do not use it for a long time?

    For better protect the battery cell and extend the life cycle, we suggest every 3 or 6 months to full recharge it.

  • Is the frequency adjustable? And how to adjust?

    50/60Hz±0.5Hz Output Frequency can be set manually.Factory Default Settings:60Hz)

    Press the power switch for 2 seconds to turn on the machine, then press the DC
    power button and AC power button simultaneously to enter frequency regulation
    mode, LCD will display the current frequency. Click the AC power button to switch the frequency between 50Hz and 60Hz. Press the DC power button and AC power button simultaneously to exit frequency regulation mode. Automatically keep the setting before your next usage.

  • Will the EB40 turn off for low load?

    No turn off if low load.

  • What is the warranty of this power station?

    One-year warranty, life time maintenance service.

  • Doctor Feel Good

    Doctor Feel Good

    I've been collecting lithium generators like this for some time now. I have quite a collection from the palm size to ones that are almost too big to carry. I travel with one or more depending on how long I will be gone. I primarily use them for work events when I know that an extension cord is going to be bulky and too long.
    As soon as I saw that this generator was available, I knew I had to have it. Since I was planning to use it for emergencies as well as work, I thought I would thoroughly test it first to make sure it would work when I needed it most.
    As soon as I got it, I unpacked it and began testing things with it. I started out with smaller items like my cell phone and laptop. Then I moved onto bigger items like my CD player/boom box. Next, I hooked up an LED lamp, a fan and a humidifier at the same time (the Dyson fans seems and to run well on generators like this). Over the following week, I continuously had something charging using the USB ports or the AC outlets. I never had to plug it back in for a recharge during that time.
    Although I had originally thought this would be used strictly for work and emergency power, I also use it when I work at home out on the patio. I love that it charges with an AC adapter or a portable solar panel.
    The short of it is this: this unit is a great value whether for use outdoors, camping, in an emergency, or for work. I couldn’t be happier with this. I can’t wait to take it out in my RV!

  • Michael Covey

    Michael Covey

    Very happy with the Maxoak product. It is easy to carry, high quality build, and the gauges are easy to read. I battery lift is amazing. I was able to keep my portable ARB refrigerator running for 26 hours before I needed to charge the battery again. When attached to the solar panel in good sunlight I was able to almost draw as much from the sunlight as I needed to keep the ARB refrigerator going. As an overlander, this product will come in handy to help me when Im off the grid. I was able to charge my phone in under and hour, and it powered my laptop for the entire day. I highly recommend this product.

  • Jason J Perkins

    Jason J Perkins

    I bought this product to insure I am able to use my CPAP machine even with a power outage.
    After fully charging the unit I was able to get 3 full nights of usage from my CPAP machine. I am very pleased with this product.

  • Jeff


    My primary purpose for this device was to serve as an online uninterruptible power supply for a CPAP (APAP actually to those who know the difference). After receiving the unit, I charged it all the way (it was ~80%). Once charged, I used a 100 watt incandescent light bulb to verify this system had ample energy and wasn't over-exaggerating its capacity like so many other units. Result - they didn't lie. I ran the light bulb for 3-4 hours before it dropped to 40%. System showed the wattage at 53 watts being used even though the bulb was rated for 100. I used a $200 multi-meter to check voltage (120) and hertz (60.1). perfect.... The test of the 100 watt light got me thinking, how would a typical (A19) LED household bulb stack-up compared to an outdated incandescent. So I decided to perform a test all you CPAP users can relate to. In an ideal scenario - where we need to use this unit for CPAP backup, we would want to use DC. My APAP is a DevillBiss Intellipap Auto. I went to a local electronic store and was able to match-up jacks to create a cable to run my CPAP on DC voltage. So then I decided to perform this test: I fully charged the MaxOak and then connected the A19 LED bulb on AC while also running the CPAP on DC at the same time. I did not have a mask on and let the CPAP run full speed with no back-pressure from a mask. The device displayed the 11 watt AC bulb as pulling 5 watts. It also showed the CPAP pulling 30 watts DC. I held my thumb over the air port [loosely] on the CPAP to mimic wearing a mask and having back pressure. The CPAP built-up to 12 centimeters of water pressure (my setting) and wattage dropped from 30 to 11. So while using this CPAP and a LED light bulb, I would be drawing less that 20 watts. I only placed my thumb on the CPAP air port temporarily to test real wattage during use. For a longer test, I wasn't going to keep my finger on the hole. I just left the CPAP operate with no back pressure for my test which raised its wattage back to 30 watts DC. I let this run 8 hours on a full battery. That's both a CPAP pulling 30 watts and a LED light bulb. Result...... 80% power remained after 8 hours. This means that I could use this system to power a LED bulb and run my CPAP for over 3 days on a single charge. It's worth noting that this is with the CPAP running without a mask. When I used a mask, the CPAP only used 11 watts instead of 30. Even at 30 watts, this unit would last ~3 days. This system can easily be used to power a CPAP, a light bulb; keep cell phones charged and maybe charge some rechargeable batteries during a power outage. I'm getting ready to fly to Oklahoma during tornado season and needed something that would keep my CPAP operational during a power outage. OHHH, almost forgot, I also fully tested if the system would charge and provide power at same time. Both AC + DC=YES. I also tested the ultimate CPAP friendly configuration. Could I leave the MaxOak system on for hours with no power being pulled and would it stay on.... YES. This means my nightly configuration will be to have the CPAP plugged-in to AC while also plugged into the MaxOak via DC. The CPAP will use AC power (electrical GRID when available) and automatically resort to DC if the AC power turns off. I noticed many other competing products have an "auto shut-off feature" if no power is being pulled. Such a "feature" prevents this ideal configuration for CPAP users. This unit did not have that unwanted feature and is perfect for the discriminating CPAP user like me. For my scenario, this device met and exceeded all expectations. I hope this review helps others who want some serious power for medical devices. If you don't know a lot about these types of battery backup systems; I'll help you with a few cliff-notes, for running a house refrigerator or your deep freezer - you need a gasoline generator. None of these battery backup systems can handle those wattage levels for any reasonable amount of time. For charging cell phones, tablets, running a CPAP and don't forget how well the LED light bulb works - this system is the bomb.

  • Steve


    This battery bank is the best prices, and has the most to it of any of the battery banks I have seen. It's has great capacity, and can take a solar input by default. I don't believe it is mppt like they claim as it does drag panel voltage well past the point of maximum power point. But it's a super good pwm charger at the least.
    I can leave mine plugged in all day to a 100 watt solar panel and it charges from about 20% to 100% in a day, with Max power somewhere between 55-60 watts. Hence, no mppt function.
    The inverter works well, and seems to support up to the 300 watt mark. It shuts down with any surge over 300 though. Like plugging my laptop into it while gaming will most of the time cause it to trip offline. It's a 330 watt charger, and with inefficiencies, probably pulls closer to 450 watts from the plug when being used full tilt.

  • DA Rodgers

    DA Rodgers

    I own seven different solar generators of various sizes between 100wh and 4,000wh. My interest is in using them to capture solar energy and make it useable for practical things. This 400wh Maxoak EB40 is my favorite generator because it is the perfect match of physical size and power capabilities. At 12 pounds and only 6”x9”x11” (approx) it is highly portable, and at 400wh, capable of delivering 300 continuous watts (600w surge) in a pure sine wave, it can power most lights, small appliances, laptop computers, CPAP machines and small tools.
    To test its capabilities I charged it until full with a 100 watt solar panel, and then discharged the battery to zero multiple times. The unit is capable of accepting 125 watts of power on it’s charging input so my 100 watt panel did not tax it at all. In fact, because it is very hard to get a solar panel to deliver its full rated wattage in the Chicago area, I could have probably used a 150 watt panel as long as it doesn’t exceed 40 volts, and the MPPT charge controller built into the EB40 would limit the current to keep it within the 125 watt limit. I confirmed that I could draw AC power at the same time the unit is charging with a solar panel by cooking rice in a 300w (rated) cooker. Notice, that’s the maximum power the EB40 can supply. That worked exactly as it would when I plug into a wall outlet. Later I cooked another pot of rice on battery power alone and used less than one quarter of the full battery.
    In another series of experiments, I charged the battery to full, then timed how long it took to shut down while powering a huge 300 watt (rated) incandescent light bulb. The bulb drew only 274 watts as measured by a separate power meter. The EB40’s power display was usually right on for lower power devices, but it was a little lower than my power meter when powering devices close to its upper limit, like this light bulb. I consider that to be minor since I normally wouldn’t power things in that range with this unit. Anyway, each time I ran this experiment the device lasted longer until it finally settled at 74 minutes. That’s almost exactly what Maxoak’s formula predicted.
    The unit comes with cables to charge with a solar panel, a car cigarette lighter plug and a 100-240vac wall charger (included). With two 110vac outputs, one USB-C, 6 USB-A and two 12vdc outputs, you can power just about anything, anywhere. I did not try the car battery jump-starting capability but a cable is included.
    This unit is the one I will use more often than any other.

  • GrabBagExpert


    I tried it with several different cords, and I have a mini poket juice with a USB-C port and that works. So the unit I received the USB-C port does not work, and yes I made sure I turned on DC and AC and I tried everything its not working. Other then that I still like this version of the unit a lot. It has a tone of power. I wish the USB-C port worked but I hate waiting or returning and its up in the air because I dont see that they have anymore of this style available and I want this style / design. All other USB ports work fine, just the USB-C port is dead on arrival.
    Find yourself a usb light bulb fixeture that runs 2-3 watts and it will light several rooms for days. It will run internet wifi 10 watts of power for few days. Plus you can charge all devices several times. Three of these and a 1000 wh yeti goal zero, two 100 watt solar panels, mini fridge and bunch of usb or 12v lights and rechargale lights and your set to handle any power outage for any length of time.
    I also have a suaoki 150wh black and red mini and use that in combination with this. But the 300 watt continues pure sine wave inverter makes a huge difference.
    I plan on buying more of these as soon as they are available. Hopefully the USB-C pors work on those.
    To me this version is a bit better then the suaoki 400 wh older style version, plus the display is much better in my opinion. The color is silver / gold but in most light conditions looks silver. Its smaller then you imagine and lighter then you imagine. Very managable.

  • Karen W

    Karen W

    As seniors, we still enjoy tent camping off the grid without access to electricity. My first association with MAXOAK was when I needed power for my CPAP device when camping that I could get at least four nights of 24V power before recharging. I purchased the MAXOAK CPAP Power Bank (model K5). I was really impressed in the design and quality of the product. Their customer service was great. As a reference to campers, ranger stations in National Parks will recharge power banks used for medical devices. This was also my first experience with portable power. When given the chance to test and review this new MAXOAK Power Station, (model EB40) I was pleased to give my input.
    The unit out of the box is very impressive. The design is clean, The LCD screen is bright, backlit and goes off in about fifteen seconds. Pushing any of the power buttons re-lights the screen. A nice feature in a dark tent at night. Operation is really simple. Three buttons on the LCD screen. Power, AC and DC voltage. Just turn the power on and select the power type needed. Can't get much easier.
     The power sources are individual sides. The DC output on the right side. The AC output on the face and the charging input on the left side. The only exception is the car jumper output is also on the left side. No looking around for what you need. The case body is attractive gold finished aluminum. It comes with a good selection of both input and output cables. Though advertised for various 12v CPAP devices, associated cables are not included.
     As we won't be camping for several months, I will have to do a follow-up to this review but I found many other uses for this power station around the house. We live in a rural area of South Florida subject to power outages and hurricanes. As you can see from the pictures with power outs, the water pick, toothbrush and all USB plug-ins now keep on running. My mini battery TV can also be recharged and maybe keep a couple of lights on too.
     Though power tools cannot be used, my battery powered tools can be recharged using the AC output. I can now take this unit with me anyplace on the property to recharge my tools on the spot. I just keep finding things to plug into this power station.
     In the beginning of this review I mentioned my CPAP device. As this unit does not have a 24V output, I used the AC output just out of curiosity for battery consumption. A seven hour usage, without humidifier, consumed at least 40% of available power. Using the AC output for a CPAP device is not very practical long term.
    If I had to fault this Power Station for anything, which is minor, would be lack of the 24V output. Aside from that, this unit has all the power sources one would need at home or camping for back-up and short term power. This is a really nice unit. It's compact, well designed and very easy to use.

  • C. Oliver

    C. Oliver

    I live off-grid with no power lines or cell service or miles. I have been waiting for this updated unit for some time. The new display is bright and crisp. USB-C is a nice added feature as more device use it. I use this to power my blower for a backup heat source in my cabin along with lighting. With the 400wh I get about 2 nights use or laptop and lights. The charger is double the charging speed of my old unit. The packaging this thing comes in would protect it falling out a building.

  • Nancy Gordon

    Nancy Gordon

    The MAXOAK EB40 is a handsome, well designed power source that has the low voltage (6-USB 5V 3.5A, 1-USB C 18W, and 2- 12V ) located together on the side separate from the two pure sine wave 110V receptacles on the front. The control buttons and bright LED display are conveniently located on the front for excellent visibility and use. A car socket is provided along with other important cables. This inclusion makes the EB40 a very complete package.
    Besides relying on this power source for everyday charging and possible emergency use, I have used it to power 110V and 12V fans. My most fun use of the EB40 is to take it along with a 100W solar panel and use to recharge LiPo batteries for my drones and RC airplanes. The ability of this power source to both discharge and recharge continuously by the solar panel makes it a virtually unlimited source of power. I do not have LiPo "range anxiety".
    In conclusion, I feel that the EB40 is a well built, handsome product which is small enough to be very portable, yet capable enough to power my array of batteries and small electric devices. I have owned heaver and more powerful products (more costly and cumbersome) and even made my own (not so elegant and heavy) so I really appreciate this product. I definitely recommend this unit to my family and friends due to its size, capabilities, and cost. Thanks for making such a useful and amazing product!

  • Michael Covey

    Michael Covey

    Very happy with the Maxoak product. It is easy to carry, high quality build, and the gauges are easy to read. I battery lift is amazing. I was able to keep my portable ARB refrigerator running for 26 hours before I needed to charge the battery again. When attached to the solar panel in good sunlight I was able to almost draw as much from the sunlight as I needed to keep the ARB refrigerator going. As an overlander, this product will come in handy to help me when Im off the grid. I was able to charge my phone in under and hour, and it powered my laptop for the entire day. I highly recommend this product.

  • Austin Nordell

    Austin Nordell

    I love using this generator when I'm traveling or working on a film set. I no longer need to worry about finding consistent power for my cell phone or laptop and if I ever have an issue with my truck battery, this generator comes with a car jump start kit. I tested it on some of my lighting gear and it has become a perfect solution/ companion to my LED lighting setups when far away from power outlets.

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