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EcoFlow 400W Solar Panel - Portable SOLAR400W

Regular price $679.00 USD
Regular price $1,199.00 USD Sale price $679.00 USD
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EcoFlow 400W Portable Solar Panel

Made using highly efficient monocrystalline silicon cells with up to 23% High Conversion Rate - EcoFlow 400 Watt solar panel has an exceptional energy conversion rate of 22-23% and gives you 400 W power input in full, direct sunlight. Plus, when connected to an EcoFlow solar generator, the Maximum Power Point Tracking (MPPT) algorithm auto-adjusts, guaranteeing a constant and stable power supply.

Foldable light weight solar panel, easy to transport, store or carry anywhere – Weighing only 16 kg, one-piece folding, compact space saving design and built-in shoulder strap makes it ideal for RV, camping, off-grid living and travel. When you’re ready to head off on your next adventure, simply collapse the panel down to store in your van or car. The compact design saves valuable space for your other travel essentials.

Damage-protected, Rugged yet Flexible – Solar Panel comes complete with a protective case and is designed for rugged outdoors. A rigid layer embedded in the carry case protects the panel from overbending when you carry or store it. Furthermore, Solar Panel itself is made from layers of pliable EVA and durable fiberglass to combine the versatility of flexible solar panels with the strength of rigid ones.

IP68 Waterproof Rating, built to weather the storm and downpour, perfect for both camping and rooftop use – Thanks to the high IP resistance level of 68 and protective ETFE film, the solar panel can withstand environments from humid and wet to dry and dusty. With protection against debris, dirt and water, this solar panel can carry on collecting energy even during a downpour and works in all kinds of weather.

Integrated, self-supporting stand with adjustable angle to harness maximum solar energy - The protective case conveniently turns into a sturdy supporting stand that adjusts from 40-80° allowing the solar panels to capture the most rays. Simply set up your panel anywhere and conveniently adjust its angle to get the most sun possible.

Wide-ranging Compatibility with its universally recognized MC4 connector – The EcoFlow 400W Solar Panel is compatible with many third-party generators in addition to being compatible with all EcoFlow DELTA Series portable power stations.

For reference only –

  1. Charge a DELTA Mini in 3-6 hours with 1 x 400W solar panel.
  2. Charge a DELTA in 4-8 hours with 1 x 400W solar panel.
  3. Charge a DELTA Max in 3-6 hours with 2 x 400W solar panels.
  4. Charge a DELTA Pro in 3.5-7 hours with 3 x 400W solar panels. 



Rated Power: 400W

Cell Type: Monocrystalline silicon

Efficiency: 22.6%

Connector Type: MC4

Open Circuit Voltage: 48V (Vmp 41V)

Short Circuit Current: 11A (Imp 9.8A)


Unfolded Dimension: 41.7*93.1*1.0in (105.8*236.5*2.5cm)

Folded Dimension: 41.7*24.4*1.0in (105.8*62.0*2.5cm)

Weight (Solar Panel): Approx. 35.3lbs (16.0Kg)

Weight (with Kickstand Case): Approx. 41.9 (19kg)

Click to view EcoFlow 400W Portable Solar Panel User Manual here

Package Contents


12 Months Warranty by the Manufacturer

Product Gallery

EcoFlow 400W solar panel - Capture more rays with High-Efficiency Solar Cells


Unique one-piece folding, compact space saving design so it’s ready to grab and go at any time.


Built to weather the storm

Carry on collecting energy even during a downpour. With a protective ETFE film and a high IP resistance level of 68, the solar cells can withstand environments from humid and wet to dry and dusty.


Take solar power on the go.

It is a camping or RV must-have. The compact design saves valuable space for your other travel essentials. When you’re ready to head off on your next adventure, simply collapse the panel down to store in your van or car.


Does the 400W Solar Panel generate a full 400W of power?

In most cases, it is normal for a solar panel not to deliver its full nominal power. Some of the reasons why this happens, as well as some suggestions for getting closer to the nominal power figure, are given below-

1. Light Intensity. The amount of light shining on the panel will result in fluctuations to the power output. You are more likely to achieve nominal power output figures closer to those obtained under test conditions when using the product on a clear day during the midday sun, than when using the product in the morning or later in the afternoon. Weather conditions will also affect the amount of sunlight that shines on the panel. For example, you are much less likely to achieve the figures for nominal power in hazy, cloudy or rainy conditions.

2. Surface Temperature. The temperature of the solar panel surface will also affect the amount of power generated. The lower the surface temperature of the panel, the more power will be produced. For example, solar panels generate more power when used during the winter than during the summer, and this is completely normal. Solar panels generally reach temperatures close to 60°C (140°F) during summer. This reduces nominal power by 13%, despite the higher levels of light shining on the panel.

3. Sunlight Angle. In optimal light conditions, the sun’s rays should remain perpendicular to the surface of the panel for best performance. The difference of ± 10 degrees of 90 degrees of sunlight hitting the panels has little effect on the power.

4. Panel Shading. The surface of the solar panel should not be shaded during use. Shading caused by shadows, foreign objects and glass can all greatly reduce power output.

    Performance Issues Caused by Malfunctioning Panels: If the panel still isn’t generating power or its output remains far below expected nominal power figures after addressing the issues above, there may be an issue with the panel itself. Please contact Customer Support for assistance.

    How much power can the 400W Solar Panel generate under normal conditions?

    This depends first and foremost on weather conditions. Generally speaking, on a clear day with no clouds in the sky, sunlight hitting the panel at a 90° angle usually generates 320W–350W of power in the 400W panel. (Current light conditions are normally 800W–900W/m² (74.3W–83.6W/ft²) with a panel temperature of 50°C (122°F) under test conditions. Nominal power ratings are based on 1000W/m² (92.9W/ft²) in AM1.5 conditions with a panel temperature of 25°C (77°F) under test conditions. Power output figures close nominal values were normally observed in the midday sun during the winter.)

    What should I know about the operating temperature, storage and use of the 400W Solar Panel?

    The operating temperature of the Solar Panel is -20°C–85°C (-4°F–185°F). The panel should be folded into its original shape and stored in its Protective Case (Kickstand), which provides sufficient protection for the product. To extend the service life of the panel, ensure that the product is not exposed to external forces/impacts when not in use. The solar panel must not be dropped, pierced, bent, or sat on. These actions may break the cell and render the panel unusable. Any such damage will not be covered by the free warranty.

    Can I use non-EcoFlow branded power stations with the 400W Solar Panel?

    Yes, but only certain types. The power station used must be compatible with MC4 standards in order to work properly. In addition, other brands of power station may not offer the same levels of compatibility as EcoFlow-branded power stations, may have lower nominal power ratings, and may not offer the same levels of performance.

    Can I connect 400W Solar Panels with another size of solar panels in series?

    Yes, but this is not recommended. Even if the voltage of the two panels are identical, the current ratings are not. This means that when the panels are connected in series, the current will be limited to that of the lower solar panel which cause the power of 400W solar panel can’t be released entirely, resulting in a 1+2<3 scenario. Please purchase panels of the same size if you intend to connect multiple panels in series

    Can I connect 400W Solar Panels in parallel?

    Yes, but this is not recommended. Though 400W solar panels can be connected in parallel, due to its high output current, may exceed the input current limitation of the power station. Parallel connections increase power output by doubling the current, but connecting the panels in this way would result in a 1+1=1 scenario because the input current limitation would restrain the total solar input. We do not recommend connecting the multiple 400W solar panels in parallel, unless you use a power station with high input current limitation.

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