Best Solar Panel for the EcoFlow RIVER 2 Pro: Can 220W Refill 768Wh in a Day?
Solar panels for the EcoFlow RIVER 2 Pro: a 220W single-face panel or two 160W in series fill its 220W input. How close one sunny day gets you to a full 768Wh.
Checked against the sources listed below. How we research.
Key takeaways
- The RIVER 2 Pro has a 768Wh battery but the same solar input as the RIVER 2 Max: 11-50V, 13A, 220W max.
- Verified ways to reach 220W: one EcoFlow 220W single-face panel, or two EcoFlow 160W single-face panels in series.
- Example estimate: 768Wh ÷ 220W ≈ 3.5 hours of full sun, about 4.2 hours with a 20% loss allowance.
- Because 220W is the ceiling, a bigger panel does not speed things up. A full refill often needs a whole clear day.
- Do not use the 125W bifacial (50V Voc, no margin) or the 400W rigid panel (13.79A, above 13A).
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For the EcoFlow RIVER 2 Pro, use one EcoFlow 220W single-face panel or two EcoFlow 160W single-face panels in series. Both reach the RIVER 2 Pro’s 220W solar maximum. At that rate its 768Wh battery needs roughly 3.5–4.2 hours of full sun (an estimate), so plan on a whole clear day for a full refill.
Big battery, same small solar input
The EcoFlow RIVER 2 Pro has the largest battery in the RIVER 2 line (768Wh, 800W AC output), but its XT60i solar input is the same as the RIVER 2 Max: 11-50V, 13A, 220W max. That means:
- The panel choices are the same as for the RIVER 2 Max.
- More panel watts than 220W will not charge it faster.
- The thing to plan is time in the sun, not panel size.
Compatibility table
| Panel | OK? | Count and wiring | Usable watts | Cable / adapter | Buy |
|---|---|---|---|---|---|
| EcoFlow 220W single-face (NextGen) | Yes | 1, single | 220W | MC4-to-XT60i, included | Lazada |
| EcoFlow 160W single-face (NextGen) | Yes | 2, series | 220W | MC4-to-XT60i, included | Lazada |
| EcoFlow 160W single-face (NextGen) | Yes | 1, single | 160W | MC4-to-XT60i, included | Lazada |
| EcoFlow 400W Lightweight | Yes, with caution | 1, single | 220W (capped) | None, built-in XT60 | Lazada |
| EcoFlow 60W | Yes | 1 single, or 2–3 parallel | 60 / 120 / 180W | Included cable; parallel cable sold separately | Lazada |
| EcoFlow 45W | Yes | 1, single | 45W | DC5521-to-XT60i, included | Lazada |
| EcoFlow 125W bifacial | No | — | — | — | 50V Voc, no safety margin on a 50V input |
| EcoFlow 400W rigid (2-pack) | No | — | — | — | 13.79A per panel, above 13A |
| EcoFlow 160W ×2 parallel / 60W ×2 series | No | — | — | — | 18.2A / about 51V |
The 400W Lightweight’s front-side current (12.2A) is within the limit, but its bifacial rating with back-side gain (13.5A) is above 13A. Because the RIVER 2 Pro caps solar at 220W anyway, the 220W or 2 × 160W setups are the better fit.
How much of 768Wh can one day of sun refill?
Example assumptions, not measurements: 220W reaching the station during each peak sun hour, and a 20% loss allowance (EcoFlow’s published RIVER 3 Max time of 3.2 hours at 220W for 572Wh is about 23% longer than simple division).
| Example peak sun hours | Solar in (220W × hours) | After 20% allowance | Share of 768Wh |
|---|---|---|---|
| 3 hours (cloudy day) | 660Wh | about 550Wh | about 72% |
| 4 hours | 880Wh | about 733Wh | about 95% |
| 5 hours | 1,100Wh | full | 100% |
On one 160W panel the same 4-hour day gives about 533Wh, roughly 69%. During a long brownout, the battery will often be partly used, so you are usually topping up rather than charging from empty. Use the EcoFlow runtime calculator to see what that energy can run overnight.
Setup steps
- Lay the panel(s) in full sun, angled at the sky, with no shade on any part.
- Two 160W panels: join their MC4 leads male-to-female in series. Use EcoFlow Solar Extension Cables if needed.
- Connect to the included MC4-to-XT60i cable and plug into the RIVER 2 Pro’s solar input.
- Check the solar watts on the display, and move the panels as the sun moves if you can.
Portable panels are plug-and-play and you can set them up yourself following the manual. Any wiring to the house, a breaker panel or the roof needs a licensed electrician and an LGU electrical permit.
What to buy
- Power station: EcoFlow RIVER 2 Pro on Shopee or EcoFlow RIVER 2 Pro on Lazada
- Option A: 1 × EcoFlow 220W single-face panel on Lazada
- Option B: 2 × EcoFlow 160W single-face panel on Lazada
Check today’s price, and confirm the listing says single-face/NextGen (EcoFlow’s Lightweight 160W and 220W are different panels). See our EcoFlow RIVER 2 Pro buyer guide for full specs.
Bottom line
The RIVER 2 Pro’s 220W solar cap is the limit, not the panel. One 220W single-face panel or two 160W in series gets you there, and a clear day of about 4 peak sun hours can refill most of the 768Wh battery.
Run your own numbers
Frequently asked questions
How many watts of solar can the EcoFlow RIVER 2 Pro take?
Will a 400W panel charge the RIVER 2 Pro faster?
Can I charge the RIVER 2 Pro from solar and the wall at the same time?
Do two 160W panels go in series or parallel on the RIVER 2 Pro?
Sources
We link to primary sources wherever possible. Rates, rules and prices change — check the latest version with the publisher.
- EcoFlow RIVER 2 Pro user manual (11-50V 13A, 220W max) (opens in a new tab) — EcoFlow
- EcoFlow RIVER 2 Pro Portable Power Station (PH store specs) (opens in a new tab) — EcoFlow Philippines
- EcoFlow NextGen 220W Portable Solar Panel user manual (opens in a new tab) — EcoFlow
- EcoFlow NextGen 160W Portable Solar Panel user manual (opens in a new tab) — EcoFlow
- EcoFlow 400W Lightweight Solar Panel user manual (opens in a new tab) — EcoFlow
- EcoFlow 400W Rigid Solar Panel (US store, per-panel specs) (opens in a new tab) — EcoFlow
- EcoFlow RIVER 3 Max solar generator PH store (220W, 0-100% in 3.2 hr), used for the loss allowance (opens in a new tab) — EcoFlow Philippines