Best Solar Panel for the EcoFlow RIVER 2 Max: Fill Its 220W Input

The best EcoFlow panels for the RIVER 2 Max are one EcoFlow 220W single-face panel or two EcoFlow 160W single-face panels wired in series. Either setup reaches the RIVER 2 Max’s full 220W solar input, and each panel comes with the MC4-to-XT60i cable you need.

The RIVER 2 Max’s solar limits

The EcoFlow RIVER 2 Max stores 512Wh and has one XT60i solar/car input rated 11-50V, 13A, 220W max. The manual says to keep the panel’s output voltage under 50V. That is a wider window than the RIVER 2’s 30V, so bigger panels and two-panel series strings now work.

Compatibility table

About the 400W Lightweight: its front-side current (12.2A) is within 13A, but EcoFlow’s bifacial rating (13.5A with back-side gain) is above it. It also weighs about 10.2 kg, and the RIVER 2 Max can only use 220W of its 400W.

Which setup to choose

• One 220W panel: one panel, one cable, nothing to join. At 7.2 kg it is the tidiest way to reach 220W.
• Two 160W in series: 320W of panels on a 220W input. The extra panel area may help you reach the 220W cap in weaker light, and you can split the weight (5.6 kg each). Two 60W panels in series are not OK here (about 51V).

When you buy the 160W or 220W, check the listing says “single-face” or “NextGen”. EcoFlow also sells 160W and 220W Lightweight bifacial panels with different specs and connectors.

Example charge-time estimate

Example assumptions: the panel delivers the full 220W the input accepts, plus a 20% allowance for losses (EcoFlow’s published RIVER 3 Plus solar time is about 15% longer than capacity ÷ watts).

• 512Wh ÷ 220W ≈ 2.3 hours of full sun
• With the 20% allowance: about 2.8 hours
• On one 160W panel: 512 ÷ 160 ≈ 3.2 hours, about 3.8 hours with the allowance

On a typical day of 4–5 peak sun hours (an example, not a measurement for your town), the 2.8 hours of full-power sun a 220W setup needs fits inside one clear day. Clouds, shade and heat will stretch that, sometimes into a second day. Plan what you will run with the EcoFlow runtime calculator.

Setup steps

1. Set the panel(s) in full sun with no shade on any cell, tilted toward the sun.
2. For two 160W panels in series, join the two panels’ MC4 leads male-to-female (one panel’s positive to the other’s negative). Use EcoFlow Solar Extension Cables if the leads don’t reach.
3. Connect the remaining free leads to the MC4-to-XT60i cable, then plug it into the RIVER 2 Max.
4. Confirm the solar watts on the screen. Keep the RIVER 2 Max in the shade.

You can set up portable panels yourself by following the manual. Anything wired 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 Max on Shopee or EcoFlow RIVER 2 Max 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. Full specs are in our EcoFlow RIVER 2 Max buyer guide.

Bottom line

For the RIVER 2 Max, one 220W single-face panel is the simplest way to fill the 220W input. Two 160W panels in series also work. Skip the 125W bifacial and the 400W rigid panels on this model.