Theoretically speaking, you can connect as many DELTAs in serial (but not in parallel) as you want. However, the efficiency of the machines will be seriously compromised (The energy consumption of the inverters grows with the number of the connected machines). As a result, we do not recommend to connect more than 3 DELTAs in serial, and it is necessary to fully charge every DELTA before you connect them together. Moreover, connecting DELTA in serial will not increase the rated output, but will expand the capacity.

DELTA can be recharged through your car port and power your devices simultaneously.

When DELTA is charged through the AC and DC port at the same time, it will prioritize taking in power through the AC port. After you plucked out the AC cable, DELTA will start taking in electricity through the DC port.

DELTA can be recharged to 0%~80% in 1 hour, and be fully recharged in 1 hour 40 minutes.

DELTA can be fully charged through a 13.6V car port in 10-12 hours.

At perfect sunlight:
a. 1x 110W solar panel: 14-28 hrs
b. 2x 110W solar panel (in series): 7-14 hrs
c. 3x 110W solar panel (in series): 5-10 hrs
d. 4x 110W solar panel: 4-8 hrs
DELTA supports solar input ranges from 10V to 65V with a maximum allowed current of 10A and maximum input of 400W. 

In the Noise Test Chamber
Test condition:
1. Noise Tester: TES-1357
2. Ambient noise: 33.8dB
3. Test outcome: the average outcome from the front, back, right, and left
Test results:
Condition 1: AC outlet: <500W; the fan: 10% full speed, <40DB, 2-meter distance; Condition 2: AC outlet: 500W-1200W; the fan: 30% full speed, <45DB, 2-meter distance;
Condition 3: AC outlet: >1200W; the fan: 100% full speed, <50DB, 2-meter distance 

Discharge Temperature Range: -4-113°F (-20-45°C)
Recharge Temperature Range: 32-113°F (0-45°C)
When the ambient temperature is above 113F or below -4F, the high temperature or low temperature warning icon on DELTA's screen will light up and flash correspondingly. At the same time the battery management system (BMS) will regulate the input and output of power to protect DELTA.
If you want to charge your DELTA in low
temperature environment (between -20°C – 0°C) please use your DELTA to power an electronic with a voltage over 500W for over 10 minutes to warm up DELTA before charging it.  

After 800 Cycles of use, DELTA's capacity will drop to 80%. However, the lifespan of a battery depending on how it is used, maintained, etc.

Please use and store the device according to the following environment temperatures:
Normal use and storage: -4 to 113°F (-20 to 45°C)
Optimal use and storage: -4 to 77°F (20 to 25°C)

Cold weather use
Cold temperatures (below freezing) can affect the unit's battery capacity due to chemical characteristics of the battery. Keep the power station within the environment temperature range, -4 to 113°F (20 to 45°C) to prolong battery life.

Discharge EF DELTA to 30%, then charge to 85% every 3 month. This can help prolong the battery life and ensure your EF DELTA is ready to recharge the gears at all times. Without any external sources for power supply during storage, EF DELTA has a shelf life of over a year. 

DELTA can be charged by Ecoflow solar panels when the open-circuit voltage is between 10V and 65V. You can connect up to 3 EcoFlow solar panels in series. You can also connect 2 sets of 3 solar panels connected in series in parallel (up to 6 panels). The parallel connection cable is an optional accessory that needs to be purchased separately.

You cannot use DELTA to jumpstart your car, because the current needed for jumpstarting a car is higher than 20An (DELTA's car port can only allow a maximum current of 8An).
DELTA can charge the lead batteries of your car through the car charge cable included in your DELTA parcel.

You can use MC4-XT60 cable to recharge your DELTA. This type of cable come with the box.

DELTA can charge Tesla around 40 minutes. After charging by DELTA you can drive your Tesla for 3-5miles. However, the mileage that can be lasted after one charge by DELTA varies, it is depends on the types of EVs you are driving and the ambient temperatures.

DELTA 1000 and DELTA 1300 are equipped with the same number of battery cells, but battery cells of different energy densities are used.

DELTA's AC ports support pure sine wave. As a result, when you plug your electronics in DELTA, they are well-protected with less generated electrical noise and longer-lasting motors.

DELTA supports an entry-level UPS function. But please perform multiple tests to confirm compatibility before connecting such devices as data servers and workstations with DELTA. EcoFlow will not be responsible for any loss of data or equipment damage caused by customers’ failure in following the instructions.

The solar panels are IP67 rated so they can still function in the rain but the performances of the panels depend on how much sunlight is available. You can rest the solar panels on the car roof, the boat roof and the roof of your house for efficient and convenient solar power (You can purchase EcoFlow's suction cups separately to help attach the panels to flat surfaces).

DELTA is equipped with the EcoFlow patented fast-tracking MPPT controller, which is supported by EcoFlow's unique tracking algorithm. This algorithm helps maximize the solar input under any weather condition. DELTA supports any solar input ranges from 10V to 65V with a maximum allowed current of 10A and a maximum input of 400W. You can chain your solar panels in series or in parallel to maximize the solar input.

To charge RIVER370:
• Wall Charge: 6 Hours Via 60W Charger (3 Hours With 2 USB-C Inputs)
• Car Charge: 8 Hours
• Solar Panel Charge: 6 Hours Via 85W Solar Panel Charger (3 Hours With 2 Solar Chargers Inputs)

To charge RIVER412:
• Wall Charge: 6 Hours
• Car Charge: 9 Hours
• 85W Solar Panel Charge: 6-9 Hours (In sunny days) 

RIVER uses best-in-class battery cells and is comprised of 40 LG Chem 18650 lithium-ion batteries.

RIVER is labeled to last around 500 cycles (recharge to 100% in 500 times). Recharging capacity for RIVER will be slightly lower than 80% after 500 cycles and lower than 60% after 1,000 cycles.
The shelf life of RIVER is one year which means the battery power will reserve for one year after its been fully charged.  

Unfortunately, RIVER cannot be carried on a plane as a carry on or stowed away as cargo luggage, because FAA limits batteries over 100Wh from riding on planes. We apologize for the inconveniency. RIVER is a great traveling companion for road trips and boat trips.

All colors of RIVER have the same battery functionality and charging capability. At this moment, RIVER is only available in deep grey color.

Pure-sine wave. We always apply the best technology on our products.

EcoFlow develop battery technology in the perspective of customers. RIVER provides a longer charge time for your devices, wider operating temperature range (-4-140 degrees Fahrenheit) and increased durability. We continue to improve the safety and quality for our products when we choose materials. We aim to provide our customer high quality products. RIVER can give you a completely carefree charging experience. RIVER is a specialist renewable generator for all of your mobile power needs.

Yes, our engineering team is currently working on products with larger capacities. Stay tuned for the most recent EcoFlow news by signing up our email subscription which you can find in the bottom of our website.

Yes, we have AC110V, 60Hz(for 100-120V editon) / 230V, 50Hz (for 220-240V edition).

RIVER Bank can be carried on flights. The Federal Aviation Administration (FAA) allows multiple lithium-ion batteries up to 100Wh on planes. If you have the Car Module stacked with the Main Module, please unstack them before going through security.

Each RIVER Bank module can be used independently to power up your devices. For combined capacity, stack the Main Module with the Car Module. This feature is unique to RIVER Bank, as RIVER Bank is the world's first portable power station you can stack.

RIVER Bank has a built-in charge controller that allows a USB-C input range of 10V-22V.

For optimal battery health, please store RIVER Bank at room temperature, in a dry environment and out of direct elements. RIVER Bank will hold it’s power up to six (6) months.

Charging time for RIVER Bank vary by modules.
RIVER Bank Main Module: You can recharge it through wall (AC) and car in 2-3 hours. Solar charging will take 6-9 and will vary based on weather conditions. 

Depending on what module(s) you have, RIVER Bank Jump Pack (Main Module and Car Module) has 6 ports and wireless charging. The Main Module has two (2) Quick Charge USB ports, two (2) USB-C ports, and the wireless charging pad. The Car Module has one (1) USB-C port and one (1) car jump starter port.

RIVER Bank is the world's largest capacity portable power station that you can fly with. RIVER Bank is stackable with a Qi-standard wireless charging pad on top. A couple of the unique features of RIVER Bank: Charge your Qi-standard devices on the 10W wireless charging pad Transfer your file using the USB Hub on the main module. Charge your laptop through the USB-C ports Fly with the airplane friendly and FAA compliant RIVER Bank modules. Recharge RIVER Bank through solar, car, or wall (AC).

Currently, RAPID can only power USB-C MacBook Pros. Fully charged, RAPID can add up to 50 minutes of working time to your laptop. The R&D dept. is working on the usability to more type-C laptops.

You can recharge RAPID through by using EcoFlow’s USB-C to USB cable, which comes in the box with RAPID. For the fastest recharge time, recharge RAPID with EcoFlow’s 9V2A Wall Charger (sold separately).

RAPID, at 5000 mAh, can be carried onto your flight or checked in your luggage. The Federal Aviation Adminitration (FAA) allows you to fly with lithium-ion batteries up to 27,000 mAh, or 100Wh.

RAPID has a shelf life of six (6) months, meaning it will hold charge for six (6) months after being fully charged.

RAPID has one (1) 18W USB Quick Charge 3.0 port and one (1) 18W USB-C port with Power Delivery. With RAPID power bank, you can power USB-C laptops and charge any USB devices, like phones, watches, GoPros, and tablets.

RAPID is lighter and smaller than any 5000 mAh power bank on the market which also supports quick charging, and can power any USB-C laptop. Left alone, RAPID reserve power for 6 months. Engineered with an advanced battery management system and crafted with durable, high quality materials, RAPID gives you power in your pocket for years to come.

Using Wi-Fi:
a. Long press the IOT Reset button on R600 until you hear a “beep” sound.
b. Find the device in the Wi-Fi setting on your phone. Click the device to connect.
c. Go back to the EcoFlow App. Click the + on the top right to start connection.
d. Tick the “operation confirmed” and proceed to the next step.
e. Choose the Wi-Fi and enter the password to proceed.
f. Wait until the connection is finished.

Using Hotspot:
a. Long press the IOT Reset button on R600 until you hear a “beep” sound.
b. Find the device in the Wi-Fi setting on your phone. Click the device to connect.
c. Wait until the connection is finished.

Please refer to FAQ 1

The firmware can be upgraded using the EcoFlow App.
a. Make sure the R600 is plugged in to AC or has at least 50% power and System Power is ON.
b. Disconnect all other input or Outputs from the R600.
c.Make sure the 2.4 GHz WiFi router signal is strong.
d.On the System Settings page, tap "Update" button
e.Four packages will be downloaded and installed. While this happens the icons on the LCD display may flash which is normal.
f.Close and reopen EcoFlow App and verify the new Version number appears on the Device System page. 

Find your devices on the “Devices” Page, go to the “System” button, then you will find the firmware version by clicking “Version” on the system page.

 a.Make sure your phone is connected to the device you need to use.
b.Make sure that your device is on.
c.Make sure the Wi-Fi your device is connected to is on.
d.Find your device in the APP then explore the functions you would like to accomplish remotely through the APP 

When moving to a different Wi-Fi network, please repeat the steps listed in FAQ 1.

Open the APP, find "Help & Feedback" under the user page, and click "Feedback"

Click "AC" on the device page of the APP, and you could turn on the "X-Boost" function after entering the page.
*In order to save power, it is recommended to turn off the X-boost function when you don’t need to use it.
*X-boost technology's built-in advanced algorithms lower the required output of the heavy-duty devices. That means a smart 600W inverter can run devices with up to 1200W per draw.
*X-Boost mode is NOT suitable for ALL appliances. Some 600W-1200W appliances with strict voltage requirements may not function (eg. air compressor). Please test to confirm before using the device. X-Boost mode is enabled by default. You can disable it on the APP. 

 a.Turn on the parallel function
b.Find the AC parallel port on the right end of the device, and use the parallel cable to connect the two devices together. Connect the red wire to the red socket, and the black wire to the black socket;
c.Short press the switch key of the first device to turn on the machine;
d.Press and hold the AC switch on the right side of the first device for more than three seconds until the parallel icon on the lower left corner of the LCD screen starts to flash, which means that the device is waiting for parallel. Please connect the second device within 1 minute after the icon flashes;
e.Repeat this operation on the second device to enable the parallel function of the device;
f.After the parallel operation is successful, the parallel icon on the LCD screen will become steady on;
g.Turn off the parallel function
h.When the parallel operation is over, press and hold the AC switches of the two devices for more than 3 seconds until the parallel icon disappears;
i.Remove the parallel cable when done;
*When the second device is not connected within 1 minute after the parallel function is turned on, the AC output will automatically turn off

No. The flashing icon only indicates that the component is being upgraded.

When the screen is off, the light will automatically go off instantly; if you need to use the ambient light continuously, please make sure that your screen standby time has been set to "Never" or select the ambient light to the "Night light" mode.

Here we listed some similarities and differences between the RIVER Pro and the R600 Pro:
RIVER Pro and R600 Pro have a similar capacity: RIVER Pro: 720Wh vs R600 Pro: 768Wh. Both can be recharged via AC wall outlet, 12V car charge and solar panels and has 10 available outlet options, including 3 x AC output, 2 x USB-A, 1 x USB-A fast charge, 1 x USB-C, 1 x Car cigarette output, 2 x DC5521. Both can be recharged from 0% to 80% in 1 hour and fully recharged 1.6 hours.

RIVER Pro has the advantages in wider discharge temperature range and lighter weight. R600 Pro has the advantages in longer lifecycle and capability to connect an additional unit in parallel via X-link.

RIVER Pro and R600 Pro have their own accessories options. For instance, the RIVER Pro and the R600 Pro do not share the same Extra Battery option: The RIVER Pro can connect to a RIVER Pro Extra Battery but the RIVER Pro Extra Battery does not work with the R600 Pro. Meanwhile the R600 Pro can connect to an EF1500 but the EF1500 does not work with the RIVER Pro.

The RIVER Pro is now selling at EcoFlow Official website, Amazon.com and other authorized EcoFlow dealers. Although the R600 Pro is not selling anymore, we will continue to provide customer support and warranty service for the product.

Detailed Comparison:

They’re made from monocrystalline silicon which is more efficient than polycrystalline. New materials like EVA and ETFE protect against high temperatures, corrosion, sunlight, as well as damage, which ensures that they can be used outdoors for long periods. They have a waterproof rating of IP67 and are also resistant to dust and UV rays.