EcoFlow NextGen 220W Bifacial Portable Solar Panel vs EcoFlow 400W Portable Solar Panel
Two of the portable solar panels in our best portable folding solar panels for power stations comparison, lined up spec by spec. Every figure comes from the manufacturer pages linked below, and the scores use the same published formula as the full ranking.
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Best for: The best all-round folding panel for mid-size stations
Check price at AmazonBest for: 400 W in one fold-out piece for DELTA-class stations
Check price at AmazonSpec-by-spec comparison
Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.
| Spec | EcoFlow NextGen 220W Bifacial Portable Solar Panel | EcoFlow 400W Portable Solar Panel | Weight |
|---|---|---|---|
| Rated powerRated (STC) watts. Real output in sun is usually 60–85% of this. | 220 W | 400 W | 30% |
| Watts per kgOur calculation from the maker's rated watts and weight. Higher means more power for what you carry. | 31.4 W/kg | Not listed | 30% |
| Cell efficiency (listed)Higher efficiency packs more watts into the same area. Skipped when the maker doesn't publish it. | 25 % | 23 % | 20% |
| IP68 rated (listed)IP68 means dust-tight and protected against immersion as defined by the maker. We mark Yes only when the maker lists IP68. | Yes | Yes | 10% |
| Bifacial (listed)Bifacial panels also collect light reflected onto the back, which helps on sand, snow or concrete. | Yes | No | 10% |
| Rated power | 220 W (±5 W) front / 175 W rear | 400 W | info |
| Cells | N-type TOPCon monocrystalline | Not listed | info |
| Efficiency | 25.00% | Up to 23% | info |
| Voc / Isc | 21.5 V / 12.4 A | Not listed | info |
| Weight | Approx. 15.4 lb (7.0 kg) | Not listed on the EcoFlow page we read | info |
| Folded | 24.2 × 23.2 × 1.3 in | Not listed | info |
| Rating | IP68 | IP68 | info |
| Warranty (US) | 12 months | Not listed | info |
| Stand | Not listed | Self-supporting, adjustable angle | info |
| Cable | Not listed | Solar-to-XT60 cable included | info |
| VoltPick score | 7.3/10 | 6.4/10 | 100% |
Where each one comes out ahead
EcoFlow NextGen 220W Bifacial Portable Solar Panel
Better published figure on: Cell efficiency (listed), Bifacial (listed).
What we like
- 25% N-type TOPCon cells
- Bifacial, with a 175 W rear rating
- IP68
Watch out for
- 12-month US warranty is short
EcoFlow 400W Portable Solar Panel
Better published figure on: Rated power.
What we like
- 400 W in one panel
- IP68
- XT60 cable included
Watch out for
- EcoFlow's page didn't list weight
- Lower efficiency than the NextGen panels
Verdict
On published specs, the EcoFlow NextGen 220W Bifacial Portable Solar Panel scores higher (7.3 vs 6.4). Specs don't capture sound character or feel, so weigh the pros and cons above too.
- Choose the EcoFlow NextGen 220W Bifacial Portable Solar Panel if this sounds like you: the best all-round folding panel for mid-size stations.
- Choose the EcoFlow 400W Portable Solar Panel if this sounds like you: 400 W in one fold-out piece for DELTA-class stations.
- EcoFlow NextGen 220W Bifacial Portable Solar Panel: EcoFlow: NextGen 220W bifacial specs
- EcoFlow 400W Portable Solar Panel: EcoFlow: 400W portable solar panel