The Anker SOLIX PS400 Bifacial Portable Solar Panel is the better portable solar panel overall, rated 4.3 to 4.0. The Anker SOLIX PS400 Bifacial Portable Solar Panel leads on durability and features. The Anker SOLIX PS400 Bifacial Portable Solar Panel costs $199.01 less ($599.98 vs $798.99).
For owners of large power stations who want 400 W from a single panel they can still carry. It is much lighter than older 400 W folding panels.
Amazon $599.98 Anker SOLIX $699.99For owners of large BLUETTI or similar power stations who want maximum watts from one panel at a campsite or during an outage. The short warranty and high voltage rule it out for small stations.
Amazon $798.99 BLUETTI $849Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Each factor is scored 0-100 against the same fixed reference points for every large portable solar panel; a clear win is highlighted. How we rank explains each one.
| Factor weight | Anker SOLIX PS400 Bifacial Portable Solar Panel | BLUETTI SORA 500 Portable Solar Panel (500W) |
|---|---|---|
| Overall rating | 4.3/5 | 4.0/5 |
| Value 30% | 57 $1.50 per rated watt | 52 $1.60 per rated watt |
| Tested output 20% | 89 not yet tested; estimated 87% of rated watts from the median of the 10 tested panels | 89 not yet tested; estimated 87% of rated watts from the median of the 10 tested panels |
| Portability 15% | 100 18.3 W per lb (21.9 lb (9.9 kg)) | 97 17.6 W per lb (28.4 lb (12.9 kg)) |
| Durability 15% | 100 IP68, 5-year warranty | 60 IP67, 1-year warranty |
| Efficiency 10% | 100 25% claimed efficiency | 100 25% claimed efficiency |
| Features 10% | 60 built-in kickstand, bifacial | 35 built-in kickstand |
| Anker SOLIX PS400 Bifacial Portable Solar Panel | BLUETTI SORA 500 Portable Solar Panel (500W) | |
|---|---|---|
| Output | ||
| Rated power | 400 W | 500 W |
| Tested output | Not tested (estimated 87%) | Not tested (estimated 87%) |
| Efficiency | 25% ("25%+ conversion efficiency" per Anker; cell vs module not stated) | 25% (up to 25%, as quoted by BLUETTI) |
| Cells | - | Monocrystalline (N-type) |
| Bifacial | Yes | No |
| Electrical | ||
| Open-circuit voltage (Voc) | - | 49.1 V |
| Voltage at max power (Vmp) | 48 V | 40.9 V |
| Short-circuit current (Isc) | - | 13.3 A |
| Current at max power (Imp) | 8.3 A | 10.2 A |
| Connections | ||
| Output connector | - | MC4 |
| Cables included | 2x 8.2 ft (2.5 m) solar charging cable, 1.6 ft (0.5 m) XT-60i solar charging cable | 1.5 m MC4-to-XT60 cable |
| USB ports | - | None |
| Build | ||
| Weight | 21.9 lb (9.9 kg) | 28.4 lb (12.9 kg) |
| Folded size | 22.3 x 38.7 x 3.2 in | 22.4 x 17.5 x 3.3 in (570 x 445 x 85 mm) |
| Unfolded size | 90.2 x 38.7 x 0.7 in | 100 x 45.1 x 0.1 in (2541 x 1146.6 x 3 mm) |
| Kickstand | Yes | Yes |
| Water resistance | IP68 | IP67 |
| Warranty | 5 years | 1 years |
