The EcoFlow 400W Portable Foldable Solar Panel has been outstanding. It delivers strong, consistent power in good sunlight and pairs perfectly with EcoFlow power stations. Setup is quick, the folding design is convenient, and it’s easy to reposition to track the sun. Build quality is excellent—sturdy materials, solid connectors, and it feels made for outdoor use. Despite its size, it’s manageable to transport and stores neatly when folded. This panel has been a reliable way to recharge during outages and off-grid use. If you need serious portable solar power, this panel is worth the investment. Highly recommended.

Hoked up a single 400 watt panel. I live in orlando florida so sun is always available With some adjustment it was pushing 300-325. I purchased a second panel but havn't tried them in series yet. I hope to get 600-700 watts. I think it will do the job with an extra battery. .

Big. Fairly heavy….but yea, portable. Panel Flexes back a bit when using the case as the stand (all there models do, I have the 400, 220, 160, and 110s). Typically get 300 watts laying flat and not adjusting. Happy enough about that. Running two in series I have seen 650 as a high, again flat and not accounting for tilt and angles (and they are fairly dirty).

I bought one portable EF 400-W solar panel and tested I for “real output”. I liked it so I bought a second panel and connected it to my DELTA Pro Ultra. Yesterday’s two panels in series produced 3.16kWh of solar energy on a sunny day. My only concern is how long will the folding panels last, when compared to the fixed panels. The big plus is that the entire system is portable, so it can be moved if/when I change locations or go camping. The DPU is a bit heavy, but a small dolly can be used to assist in moving it. Proprietary connections on the inverter and battery may limit connections to future advances or improvements, but they also make it very simple to setup and get the system running to support a small home office.

[This review was collected as part of a promotion.] Walmart has the best price on these. They undercut Ecoflow and Amazon by about $150. The folding frame is junk so you'll have to make your own. I used pallets with the panels screwed down. Then prop them up to the angle you want. Now for the good part. In full sun, these panels consistently put out 380 - 405 watts! I have not seen any other brand come so close to their rated value. Usually you get about 75% Spend a little more and only cry once.

Great panel with performance that out shines other 400 watt panel systems. EcoFlow backs up its products with excellent customer service and rapid feedback on any questions or issues. This is the solar panel to buy for its ease of mobile deployment, power, and durability.

Worth every penny. This solar panel has changed the way I use my EcoFlow max. amazing working art. It even gives me 370 watt in day cloudy day. My generator is always 95-100 topped up. During the day. Just need a little bit of light and they power up. Highly recommend. I don’t get paid for this survey and not sponsored. My personal experience. They deserve 5 star. I ordered my 2nd 400 watt panel.

I tried out this 400W solar panel with one of my Delta Pros yesterday. It was a partly sunny day, so the wattage input varied greatly. However, I was able to get up to 367 W of input at one point, and was able to charge from 30% up to 61% within an afternoon. I’m happy with that!

You know how you bump elbows with someone on the sidewalk and they put a little brainstorm in your head, well thats what led me to buying the Delta Pro and the "Extra Battery" .. I use it exclusively for charging my Tesla (I don't have a garage, or access to electricity in my carport) .. Perfect solution for everyday driving for me ...

The panel itself is a bit bulky (42lbs) if you make a brace it works very well I have gotten up to 385 watts of power. And the panel is robust. The down side to this panel is that it takes 6 to 8 min to set up. And the team that designed the stand never tried to use that piece of crap I have 3 of them modified all of them so I don't have to unfold or use the terrible stands .