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, efficiency and features. The CTOLITY 400W Portable Solar Panel (400W-NEW) wins on value. The CTOLITY 400W Portable Solar Panel (400W-NEW) costs $309.99 less ($289.99 vs $599.98).
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 $699.99A low-priced 400 W folding panel, but its listing is too thin and inconsistent to recommend over better-documented panels until CTOLITY publishes full specs.
Amazon $289.99Prices 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 | CTOLITY 400W Portable Solar Panel (400W-NEW) |
|---|---|---|
| Overall rating | 4.3/5 | 4.0/5 |
| Value 30% | 57 $1.50 per rated watt | 100 $0.72 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)) | 50 weight not published (neutral score used) |
| Durability 15% | 100 IP68, 5-year warranty | 36 IP65 |
| Efficiency 10% | 100 25% claimed efficiency | 73 23.4% claimed efficiency |
| Features 10% | 60 built-in kickstand, bifacial | 35 built-in kickstand |
| Anker SOLIX PS400 Bifacial Portable Solar Panel | CTOLITY 400W Portable Solar Panel (400W-NEW) | |
|---|---|---|
| Output | ||
| Rated power | 400 W | 400 W |
| Tested output | Not tested (estimated 87%) | Not tested (estimated 87%) |
| Efficiency | 25% ("25%+ conversion efficiency" per Anker; cell vs module not stated) | 23.4% (conversion efficiency from the Amazon listing's description, not stated as cell or module; the listing title says 23%) |
| Cells | - | Monocrystalline |
| Bifacial | Yes | No |
| Electrical | ||
| Voltage at max power (Vmp) | 48 V | - |
| Current at max power (Imp) | 8.3 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 | - |
| Build | ||
| Weight | 21.9 lb (9.9 kg) | - |
| Folded size | 22.3 x 38.7 x 3.2 in | - |
| Unfolded size | 90.2 x 38.7 x 0.7 in | - |
| Kickstand | Yes | Yes |
| Water resistance | IP68 | IP65 |
| Warranty | 5 years | - |
