EcoFlow RIVER 2 Max 500 with the EcoFlow 100W Rigid
Works with the right cable · 2S2P · 220 W
This port needs an MC4 to XT60i cable with the signal pin. Owners report a plain 2-pin XT60 limits solar input to about 8 A.
Thick mark: cold Voc · Thin mark: operating Vmp, 34.2 V
1 caveat
- The connector type comes from a secondary source, so check the physical port.
Parts for this layout
- EcoFlow RIVER 2 Max 500$329 View on Amazon
- 2 × EcoFlow 100W Rigid (2-pack)$478 View on Amazon
- 10AWG Solar to XT60i Cable XT60i to Solar Connector Adapter Cord$13.99 View on Amazon
- BougeRV Solar Branch Connectors 2 to 1 Y Connector FMM+MFF, 1 Pair$8.99 View on Amazon
Estimated total $829.98
Prices can change. The price on Amazon at purchase is what applies.
Can I connect the EcoFlow 100W Rigid to the EcoFlow RIVER 2 Max 500?
Yes, with limits. The best setup is 4 panels wired 2S2P on Solar Input, delivering up to 220 W. That string reaches 45.3 V at −10 °C against the port’s 50 V limit, using EcoFlow’s published -0.33 %/°C coefficient. Check your own unit’s labels too.
Danger: overvoltage risk. Do not connect the layouts marked red below. Going over a station’s input voltage limit can permanently damage it.
What is the best way to wire EcoFlow 100W Rigid panels to the EcoFlow RIVER 2 Max 500?
Wire them 2S2P on Solar Input for about 220 W from 4 panels. The string runs at 34.2 V, above the 11 V minimum the port needs to start. Stop at 2 in series on the lowest-voltage port, because 3 in series exceeds its limit in the cold.
| Port | Layout | Voc 25 °C | Voc 0 °C | Voc −10 °C | Voc −20 °C | Vmp | Isc | Watts | Verdict at −10 °C |
|---|---|---|---|---|---|---|---|---|---|
| Solar Input | 1S1P | 20.3 | 22.0 | 22.6 | 23.3 | 17.1 | 6.3 | 101 | Works with the right cable |
| Solar Input | 1S2P | 20.3 | 22.0 | 22.6 | 23.3 | 17.1 | 12.6 | 202 | Works with the right cable |
| Solar Input | 2S1P | 40.6 | 43.9 | 45.3 | 46.6 | 34.2 | 6.3 | 202 | Works with the right cable |
| Solar Input | 2S2P | 40.6 | 43.9 | 45.3 | 46.6 | 34.2 | 12.6 | 220 | Works with the right cable |
| Solar Input | 3S1P | 60.9 | 65.9 | 67.9 | 69.9 | 51.3 | 6.3 | 0 | Danger: overvoltage |
| Solar Input | 4S1P | 81.2 | 87.9 | 90.6 | 93.3 | 68.4 | 6.3 | 0 | Danger: overvoltage |
How cold can it get before this string overvolts the EcoFlow RIVER 2 Max 500?
A string of 3 EcoFlow 100W Rigid panels breaches the 50 V limit of Solar Input even at 25 °C, before any cold correction. Voltage rises as cells cool, at EcoFlow’s published -0.33 %/°C, so a clear winter sunrise is the worst case. Stay at 2 in series or fewer there.
The cold-weather correction is the same one NEC Article 690.7 requires for PV system voltage.
Which cable connects the EcoFlow 100W Rigid to the EcoFlow RIVER 2 Max 500?
You need an MC4 to XT60i cable with the signal pin. Owners report that a plain 2-pin XT60 limits EcoFlow solar input to about 8 A, which would cap this string near 274 W. Add one MC4 Y-branch pair to combine the 2 parallel strings. Keep runs short, because voltage drop grows with current and distance.
How long does the EcoFlow 100W Rigid take to recharge the EcoFlow RIVER 2 Max 500?
Expect about 2.3 peak-sun hours for a full charge from 4 panels. That’s 0.4 days in Denver, CO in June and 0.5 days in December, using a 0.70 real-world derate and NREL irradiance data. Clouds, shade and panel angle can all push it longer.
| City | June | December |
|---|---|---|
| Phoenix, AZ | 0.3 | 0.4 |
| Denver, CO | 0.4 | 0.5 |
| Los Angeles, CA | 0.3 | 0.5 |
| Austin, TX | 0.4 | 0.5 |
| Miami, FL | 0.4 | 0.5 |
| Atlanta, GA | 0.4 | 0.6 |
| Chicago, IL | 0.4 | 0.9 |
| New York, NY | 0.4 | 0.8 |
| Seattle, WA | 0.5 | 1.4 |
Where do these EcoFlow RIVER 2 Max 500 and EcoFlow 100W Rigid numbers come from?
Station limits come from us.ecoflow.com and panel ratings from us.ecoflow.com, each checked against a verbatim quote on that page. Panels must also pass a physics test: Vmp times Imp must land within 15% of rated watts. Anything failing goes to quarantine and gets no page.
| Rated power | 100 W | us.ecoflow.com“100 W（+/-5W）” |
|---|---|---|
| Open-circuit voltage (Voc) | 20.3 V | us.ecoflow.com“20.3 V” |
| Operating voltage (Vmp) | 17.1 V | us.ecoflow.com“17.1 V” |
| Short-circuit current (Isc) | 6.3 A | us.ecoflow.com“6.3 A” |
| Operating current (Imp) | 5.9 A | us.ecoflow.com“5.9 A” |
| Voc temperature coefficient | -0.33 %/°C | us.ecoflow.com“-0.33%/°C” |
| Output connector | MC4 | us.ecoflow.comsecondary“Photovoltaic connectors (adapted to MC4 connectors)” |
| Solar Input | 11 to 50 V, 13 A, 220 W | us.ecoflow.com“11-50V, 13A, 220W Max” |
|---|---|---|
| Solar Input connector | XT60i | us.ecoflow.com“Works best with RIVER 2/RIVER 2 Max/RIVER 2 Pro” |
Prices last checked and spec data verified on .