This post contains affiliate links. If you buy through our links we may earn a small commission — at no extra cost to you. This never influences our recommendations.
EcoFlow sells solar panels in four sizes — 110W, 160W, 220W, and 400W — and the mistake most people make is assuming bigger is automatically better.
It’s not. Every EcoFlow power station has a maximum solar input ceiling, and sending more watts than it can absorb doesn’t charge it any faster. The right panel size depends entirely on which station you own.
| Panel | Matches | Key Feature |
|---|---|---|
| EcoFlow 110W | RIVER series | Lightest, most portable option |
| EcoFlow 220W Bifacial | DELTA 3 Max, DELTA 2 Max | 25% efficiency, captures reflected light too |
| EcoFlow 400W | DELTA Pro | Highest single-panel wattage, chainable |
Why Bigger Isn’t Always the Right Call
The 110W panel fits the RIVER 3’s input ceiling cleanly. The 220W matches the DELTA 3 Max and DELTA 2 Max. The 400W stands alone at the top — it’s the only single panel that can feed a DELTA Pro’s full 1,600W solar input, and four of them running in parallel is the most efficient multi-panel setup EcoFlow supports.
Buy a 400W panel for a RIVER-class station and you’re paying for wattage capacity your station can never actually use.
Our Picks
EcoFlow 110W Portable Solar Panel — Best for RIVER Series
This is the lightest, most grab-and-go panel in EcoFlow’s lineup, sized specifically to match what a RIVER-class station can actually absorb.
IP68 waterproofing and a real 23% efficiency rating make it a solid performer for its size, even without the fold-out angle bracket the larger panels include.
| Pros | Cons |
|---|---|
| Lightest and most portable panel in the lineup | No angle bracket — less flexibility for optimal sun positioning |
| Correctly sized for RIVER series input ceilings | Lower wattage ceiling means longer charge times for bigger stations |
| IP68 waterproof, 23% efficiency |
Best for: RIVER 2 or RIVER 3 owners who want a panel that matches their station without overpaying for unusable wattage.
Full details and current price: EcoFlow 110W Solar Panel on Amazon
Pair it with our EcoFlow RIVER 3 review or RIVER 2 review.
EcoFlow 220W Bifacial Solar Panel — Best for DELTA 3 Max / DELTA 2 Max
This is EcoFlow’s NextGen panel, and the bifacial design is the real differentiator — it captures reflected light hitting its back side too, not just direct sun on the front.
Combined with 25% conversion efficiency (versus 23% on the 110W and 400W), this is the most technically advanced panel in the lineup, sized to exactly match the DELTA 3 Max and DELTA 2 Max input ceilings.
| Pros | Cons |
|---|---|
| Bifacial design captures extra reflected light | Priced higher than the standard 110W or 400W panels |
| 25% efficiency, the highest in EcoFlow’s portable lineup | Only makes sense if your station’s input ceiling matches |
| Includes an integrated angle guide for easier positioning |
Best for: DELTA 3 Max or DELTA 2 Max owners who want the most efficient charging their station can actually use.
Full details and current price: EcoFlow 220W Bifacial Solar Panel on Amazon
Pair it with our EcoFlow DELTA 2 Max review.
EcoFlow 400W Portable Solar Panel — Best for DELTA Pro
At 400W, this is the only single panel in EcoFlow’s portable lineup that can meaningfully feed a DELTA Pro, and it’s built to be chained — run four in parallel for the full 1,600W the DELTA Pro can absorb.
IP68 waterproof and foldable into a carry case, it’s genuinely portable despite the size, at 35.3 lbs.
| Pros | Cons |
|---|---|
| Highest single-panel wattage in the lineup | Heaviest panel — 35.3 lbs to carry and set up |
| Chains up to 4 panels for a DELTA Pro’s full input ceiling | Overkill wattage for smaller stations like the RIVER series |
| IP68 waterproof with a genuinely durable build |
Best for: DELTA Pro owners who want to charge from solar as fast as their station allows.
Full details and current price: EcoFlow 400W Solar Panel on Amazon
Pair it with our EcoFlow DELTA Pro 3 review.
Frequently Asked Questions
Which EcoFlow solar panel matches my power station?
110W fits the RIVER series, 220W bifacial matches the DELTA 3 Max and DELTA 2 Max, and 400W is sized for the DELTA Pro.
Is a bigger panel always faster charging?
Only up to your station’s solar input ceiling — sending more watts than your station can absorb doesn’t speed up charging at all.
What does bifacial mean on the 220W panel?
It has active solar cells on both sides, capturing some reflected light hitting the back panel in addition to direct sun on the front.
Can I chain multiple EcoFlow panels together?
Yes — the 400W panel in particular is designed for this, with four panels in parallel reaching the DELTA Pro’s full 1,600W input ceiling.
Are all EcoFlow portable panels waterproof?
Yes, the entire lineup carries an IP68 rating for dust and water resistance.
Final Verdict
| Panel | Best For |
|---|---|
| EcoFlow 110W | RIVER series owners |
| EcoFlow 220W Bifacial | DELTA 3 Max and DELTA 2 Max owners |
| EcoFlow 400W | DELTA Pro owners charging at full speed |
Check your station’s maximum solar input before buying — matching that number to the right panel size is worth more than chasing the highest wattage on the shelf.