We earn a commission when you buy through our Amazon links. As an Amazon Associate I earn from qualifying purchases.
EcoFlow 400W Portable Solar Panel
400 W, and 53.0 V at 14 F against 48 V on the label. Inside the solar limits of 59 of the 78 stations checked.
- 400 Wrated power
- 48 Vopen circuit
- 35.3 lbweight
- MC4connector
By the Power Station Chart team, from the maker's label figures. Last reviewed October 31, 2026.
The 400W Portable Solar Panel in brief
RIVER 2 Max and RIVER 2 Pro both stop at 50 V. The EcoFlow 400W Portable Solar Panel reads 53 V at 14°F from a 48 V open-circuit rating, which is past both, and close to the 55 V limit on the RIVER 3 Plus. Jackery's Explorer 3000 Pro and other 60 V stations are inside at one panel each, through an MC4 to DC8020 cable. The panel gives 400 W at 41 V, weighs 35.3 lb, is rated 22.6% efficient and carries IP68. In all, 59 of the 78 stations are inside.
400W Portable Solar Panel specifications
| Rated power | 400 W |
|---|---|
| Open-circuit voltage (Voc) | 48 V |
| Voltage at max power (Vmp) | 41 V |
| Short-circuit current (Isc) | 11 A |
| Current at max power (Imp) | 9.8 A |
| Connector | MC4 |
| Efficiency | 22.6% |
| Weight | 35.3 lb |
| Unfolded | 93.1 x 41.7 x 1.0 |
| Folded | 24.4 x 41.7 x 1.0 |
| Water rating | IP68 |
| Bifacial | no |
Power stations it stays inside the limits of
- EcoFlow DELTA Pro Ultra X2,400 W from 6 in seriesCheck price on Amazon
Plugs straight in (MC4).
- EcoFlow DELTA Pro Ultra2,400 W from 6 in series
Plugs straight in (MC4).
- EcoFlow DELTA Pro 3800 W from 2 in seriesCheck price on Amazon
- EcoFlow DELTA Pro800 W from 2 in seriesCheck price on Amazon
- EcoFlow DELTA 2 Max400 WCheck price on Amazon
- EcoFlow DELTA 2400 W
- EcoFlow DELTA 3 Ultra400 WCheck price on Amazon
Check the connector on both.
- EcoFlow DELTA 3 Ultra Plus400 WCheck price on Amazon
Check the connector on both.
- EcoFlow DELTA 3 Max400 WCheck price on Amazon
- EcoFlow DELTA 3 Max Plus400 WCheck price on Amazon
How it fares by maker
| Maker | Inside the window | Close to the limit | Outside |
|---|---|---|---|
| Jackery | 15 | 0 | 1 |
| EcoFlow | 15 | 2 | 4 |
| Anker SOLIX | 14 | 0 | 2 |
| BLUETTI | 15 | 2 | 8 |
Stations where it runs close to the limit when cold
- EcoFlow RIVER 3 Plus, 53.0 V against 55 V
- EcoFlow RIVER 3 Plus Wireless, 53.0 V against 55 V
- BLUETTI AC70, 53.0 V against 58 V
- BLUETTI AC70P, 53.0 V against 58 V
Stations it does not suit
- Jackery Explorer 300 v2, 16 to 28 V
- EcoFlow RIVER 2, 11 to 30 V
- EcoFlow RIVER 2 Max, 11 to 50 V
- EcoFlow RIVER 2 Pro, 11 to 50 V
- EcoFlow RIVER 3, 11 to 30 V
- Anker SOLIX C300, 11 to 28 V
These compare printed numbers at 14 F with 10% of headroom. They are not a maker's approval, and some makers limit warranty on other brands' panels. What each maker's terms say, and how series and parallel change the numbers.
FAQ
How many EcoFlow 400W Portable panels fit in series on an Explorer 5000 Plus?
One. A single panel reads 53 V at 14°F against the station's 60 V limit.
Why is the RIVER 3 Plus a tight match when it takes 55 V?
At 14°F the panel reaches 53 V, which leaves too little room under 55 V. It would also need an MC4 to XT60i cable.
Where these figures come from
1 document
- Footprint Hero, secondary, read October 31, 2026