Will the EcoFlow 400W Portable Solar Panel work with the EcoFlow RIVER 2 Max 500?
Yes, with a catch. Fine in mild weather (48V), but on a 20°F (-7°C) morning the open-circuit voltage rises to about 52.6V, above the 50V limit. Cold makes panels push more voltage. Two panels: works, with a catch (2 panels in parallel on Solar input), about 220 W.
Works, with a catch
It charges, but read the note. Best option: 1 panel on Solar input.
- Fine in mild weather (48V), but on a 20°F (-7°C) morning the open-circuit voltage rises to about 52.6V, above the 50V limit. Cold makes panels push more voltage.
- Use the solar charging cable that came with the station (MC4 on the panel side).
400 W, open-circuit 48 V, short-circuit 11 A, working 41 V / 9.8 A. Unconfirmed Panel details
EcoFlow RIVER 2 Max 500Solar input Solar input: 11 to 50 V, 220 W max. Brand page Station details
Change the count or temperatureTwo panels: every way to wire them
| Wiring | Input | Volts at 20F | Amps | Watts | Verdict |
|---|---|---|---|---|---|
| 2 panels in parallel on Solar input Fine in mild weather (48V), but on a 20°F (-7°C) morning the open-circuit voltage rises to about 52.6V, above the 50V limit. Cold makes panels push more voltage. | Solar input | 52.6 | 19.6 | 220 | Works, with a catch |
| 2 panels in series on Solar input Open-circuit voltage 96V is above the station's 50V limit. Going over a station's input voltage limit can damage it. | Solar input | 105.1 | 9.8 | 0 | Don't connect |
Quick answers
Will the EcoFlow 400W Portable Solar Panel work with the EcoFlow RIVER 2 Max 500?
Yes, with a catch. Fine in mild weather (48V), but on a 20°F (-7°C) morning the open-circuit voltage rises to about 52.6V, above the 50V limit. Cold makes panels push more voltage. Two panels: works, with a catch (2 panels in parallel on Solar input), about 220 W.
Can I connect two 400W Portable Solar Panel panels to the RIVER 2 Max 500?
Yes, 2 panels in parallel on Solar input. That gives about 220 W, with one catch: Fine in mild weather (48V), but on a 20°F (-7°C) morning the open-circuit voltage rises to about 52.6V, above the 50V limit. Cold makes panels push more voltage..
What cable do I need to connect the 400W Portable Solar Panel to the RIVER 2 Max 500?
Use the solar charging cable that came with the station (MC4 on the panel side).
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 2 Max 500 accepts up to 50 V on the Solar input.
Where to buy
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Other panels that work with the RIVER 2 Max 500
- EcoFlow RIVER 2 Max 500: solar input 11 to 50 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 13 A cap is safe: the station takes 13 A and you get fewer watts. We count only the capped watts.
- Max 220 W on this input.
- 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.