We may earn a commission if you buy through these links. It never changes a verdict. How this works
Find my setup

Will the EcoFlow 400W Portable Solar Panel work with the EcoFlow RIVER?

No. Open-circuit voltage 48V is above the station's 25V limit. Going over a station's input voltage limit can damage it. Two panels: don't connect (2 panels in parallel on Solar input), about 0 W.

Verdict

Don't connect

Do not plug this in. Open-circuit voltage 48V is above the station's 25V limit. Going over a station's input voltage limit can damage it.

1 x 400W Portable Solar Panel1 panel on Solar input
RIVERSolar input
Expected
0W
Voltage at 20F
52.6V
limit 25 V
Current
9.8A
cap 12 A
  • Open-circuit voltage 48V is above the station's 25V limit. Going over a station's input voltage limit can damage it.
Cables to buyNone. Do not connect this combination. Pick a panel with lower open-circuit voltage, or fewer in series.
EcoFlow 400W Portable Solar Panel

400 W, open-circuit 48 V, short-circuit 11 A, working 41 V / 9.8 A. Unconfirmed Panel details

EcoFlow RIVER

Solar input Solar input: 10 to 25 V, 200 W max. Brand page Station details

Change the count or temperature

Two panels: every way to wire them

WiringInputVolts at 20FAmpsWattsVerdict
2 panels in parallel on Solar input
Open-circuit voltage 48V is above the station's 25V limit. Going over a station's input voltage limit can damage it.
Solar input52.619.60Don't connect
2 panels in series on Solar input
Open-circuit voltage 96V is above the station's 25V limit. Going over a station's input voltage limit can damage it.
Solar input105.19.80Don't connect

Quick answers

Will the EcoFlow 400W Portable Solar Panel work with the EcoFlow RIVER?

No. Open-circuit voltage 48V is above the station's 25V limit. Going over a station's input voltage limit can damage it. Two panels: don't connect (2 panels in parallel on Solar input), about 0 W.

Can I connect two 400W Portable Solar Panel panels to the RIVER?

No: Open-circuit voltage 48V is above the station's 25V limit. Going over a station's input voltage limit can damage it.

Is it safe on a cold morning?

Panel voltage rises in the cold. One 400W Portable Solar Panel goes from 48 V on its label to about 52.6 V at 20°F and 54.2 V at 0°F. The RIVER accepts up to 25 V on the Solar input.

Where to buy

$599 at the EcoFlow store, Oct 28, 2026
BuyAmazon
$349 at the EcoFlow store, Oct 28, 2026
Buy

We may earn a commission if you buy through these links. It never changes a verdict.

Other panels that work with the RIVER

→Jackery SolarSaga 200 (JS-200E), about 200 W with two
→EcoFlow NextGen 220W Bifacial Portable Solar Panel, about 200 W with two
→EcoFlow 100W Rigid Solar Panel, about 200 W with two
→EcoFlow 100W Flexible Solar Panel, about 200 W with two
→EcoFlow 110W Portable Solar Panel, about 200 W with two

All 33 panels checked against the RIVER

Rules we applied
  • EcoFlow RIVER: solar input 10 to 25 V on the Solar in (Solar input). EcoFlow sets this limit on open-circuit voltage (Voc), so we hold the panels' Voc on your coldest morning to it.
  • Cold raises panel voltage: we add 0.30% per °C below 77F (25°C), a typical figure, since this panel does not publish its own. At 20F one panel's 48 V becomes 52.6 V.
  • Current over the 12 A cap is safe: the station takes 12 A and you get fewer watts. We count only the capped watts.
  • Max 200 W on this input.
Assumptions
  • Cold-morning voltage uses 0.30% per °C, typical for crystalline panels. This panel's own value is not published.
  • Expected watts are the best case in full sun. Real-world midday output is usually 60 to 80% of that.
  • Some numbers for EcoFlow 400W Portable Solar Panel come from a shop listing we have not confirmed in the manual yet.
Sources
From the brand's pageRIVER spec page, solar input
Shop listing, not yet confirmed400W Portable Solar Panel label values
Checked Oct 28, 2026