Watch a Video Review

Key Takeaways

Best for: Big power stations and long outages
Standout: 400W from a single panel
Watch out: 35.3 lb and a high price
Not for: Small 1kWh power stations

The EcoFlow 400W Portable Solar Panel delivers 400W from a single foldable panel with an adjustable carry case that doubles as a stand. It weighs 35.3 lb and sells for about $650 to $750.

What you need before you buy

A large power station that accepts 400W of solar, such as an EcoFlow DELTA.
Space to unfold it in full sun.
An MC4 adapter for non-EcoFlow stations.

How much it charges

In good sun, roughly 1.6kWh to 2.4kWh a day, enough to refill a 2kWh station or keep essentials running through a multi-day outage.

Not sure it will work with your power station? Read how to match a solar panel to a power station.

How it compares

	EcoFlow 400W	BLUETTI PV350	EcoFlow NextGen 220W
Typical price	$650–$750	$599–$699	$399–$449
Rated power	400W	350W	220W front / 175W rear
Efficiency	About 23%	Up to 23.4%	Up to 25%
Weight	35.3 lb	30.6 lb	About 15.4 lb
Best for	Fastest single-panel charging	Big BLUETTI stations	Lighter bifacial

See my BLUETTI PV350 and EcoFlow NextGen 220W reviews.

Want to see other Solar Panels? Compare them side by side →

How I researched this: EcoFlow’s 400W panel product page and specs, the Amazon listing, and a video review from MakeUseOf. Prices checked October 30, 2026.

EcoFlow 400W Portable Solar Panel

The EcoFlow 400W panel recharges big power stations fast from one panel, but weighs 35.3 lb. Here is who it suits.

Product Brand: EcoFlow

Editor's Rating:
4.4

Pros

400W from one panel, double most portables
Recharges a 2kWh station like the DELTA 2 Max in roughly a sunny day
Adjustable carry case doubles as a stand
Durable EVA and fiberglass build
About 23% efficient monocrystalline cells

Cons

35.3 lb and large when unfolded
Expensive
Needs a station that accepts 400W of solar on one input
MC4 output may need an adapter for non-EcoFlow stations

Specs

Model	EcoFlow 400W Portable Solar Panel
Rated power	400W
Cells	Monocrystalline, about 23% efficiency
Build	EVA and fiberglass layers
Connector	MC4
Stand	Adjustable carry case
Weight	35.3 lb

Verdict

The EcoFlow 400W is the fastest way to solar-charge a big power station without wiring multiple panels together. It is heavy and pricey, so if you have a 1kWh station, a 200W panel like the Renogy is plenty.

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Common Questions

Which power stations can use 400W?: Most large stations, including the EcoFlow DELTA 2 Max, DELTA 3 Plus and DELTA Pro 3. Check that your station's solar input accepts the panel's voltage and wattage.
How long to charge a 2kWh station?: Around 6 to 8 hours of strong sun, depending on angle and weather.
Can I carry it easily?: It folds into a case, but at 35.3 lb it is best moved short distances.

EcoFlow 400W Portable Solar Panel Review