EcoFlow RIVER 2 Max 500 with the Renogy 100W Flexible
Works with the right cable · 1S2P · 200 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, 20.7 V
2 caveats
- The maker publishes no temperature coefficient, so cold voltage uses our conservative −0.40 %/°C.
- 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 × Renogy 100W Flexible$219.98 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 $571.96
Prices can change. The price on Amazon at purchase is what applies.
Can I connect the Renogy 100W Flexible to the EcoFlow RIVER 2 Max 500?
Yes, with limits. The best setup is 2 panels wired 1S2P on Solar Input, delivering up to 200 W. That string reaches 27.8 V at −10 °C against the port’s 50 V limit, using our cautious cold-weather assumption because Renogy publishes no temperature 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 Renogy 100W Flexible panels to the EcoFlow RIVER 2 Max 500?
Wire them 1S2P on Solar Input for about 200 W from 2 panels. The string runs at 20.7 V, above the 11 V minimum the port needs to start. Stop at 1 in series on the lowest-voltage port, because 2 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 | 24.4 | 26.8 | 27.8 | 28.8 | 20.7 | 5.2 | 100 | Works with the right cable |
| Solar Input | 1S2P | 24.4 | 26.8 | 27.8 | 28.8 | 20.7 | 10.3 | 200 | Works with the right cable |
| Solar Input | 2S1P | 48.8 | 53.7 | 55.6 | 57.6 | 41.4 | 5.2 | 0 | Danger: overvoltage |
| Solar Input | 2S2P | 48.8 | 53.7 | 55.6 | 57.6 | 41.4 | 10.3 | 0 | Danger: overvoltage |
| Solar Input | 3S1P | 73.2 | 80.5 | 83.4 | 86.4 | 62.1 | 5.2 | 0 | Danger: overvoltage |
| Solar Input | 4S1P | 97.6 | 107.4 | 111.3 | 115.2 | 82.8 | 5.2 | 0 | Danger: overvoltage |
How cold can it get before this string overvolts the EcoFlow RIVER 2 Max 500?
A string of 2 Renogy 100W Flexible panels breaches the 50 V limit of Solar Input once cells fall below 19 °C. Voltage rises as cells cool, at our assumed −0.40 %/°C (no figure is published), so a clear winter sunrise is the worst case. Stay at 1 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 Renogy 100W Flexible 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 166 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 Renogy 100W Flexible take to recharge the EcoFlow RIVER 2 Max 500?
Expect about 3.6 peak-sun hours for a full charge from 2 panels. That’s 0.6 days in Denver, CO in June and 0.8 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 | 0.5 | 0.7 |
| Denver, CO | 0.6 | 0.8 |
| Los Angeles, CA | 0.5 | 0.8 |
| Austin, TX | 0.6 | 0.8 |
| Miami, FL | 0.7 | 0.8 |
| Atlanta, GA | 0.7 | 0.9 |
| Chicago, IL | 0.7 | 1.3 |
| New York, NY | 0.7 | 1.2 |
| Seattle, WA | 0.7 | 2.2 |
Where do these EcoFlow RIVER 2 Max 500 and Renogy 100W Flexible numbers come from?
Station limits come from us.ecoflow.com and panel ratings from renogy.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 | renogy.com“100 W±3%” |
|---|---|---|
| Open-circuit voltage (Voc) | 24.4 V | renogy.com“24.4 V” |
| Operating voltage (Vmp) | 20.7 V | renogy.com“20.7 V” |
| Short-circuit current (Isc) | 5.16 A | renogy.com“5.16 A” |
| Operating current (Imp) | 4.84 A | renogy.com“4.84 A” |
| Voc temperature coefficient | −0.40 %/°C | Assumed: not published by the maker |
| Output connector | MC4 | renogy.comsecondary“Solar 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 .