The ZOUPW 480W Bifacial Portable Solar Panel N-Type 16BB (ZP-DS480W) is the better portable solar panel overall, rated 4.5 to 4.3. The ZOUPW 480W Bifacial Portable Solar Panel N-Type 16BB (ZP-DS480W) leads on durability and efficiency. The Greenmagic 400W Portable Foldable Solar Panel (GM400B) wins on value and features. The Greenmagic 400W Portable Foldable Solar Panel (GM400B) costs $227 less ($322.99 vs $549.99).
A light, high-wattage bifacial panel for owners of large power stations with a 50 V-plus solar input, especially over reflective ground. Owners of small or low-voltage stations should look elsewhere.
Amazon $549.99 ZOUPW $649.99A low-cost 400 W folding panel for owners of large power stations who camp by the car or RV. The thin spec sheet means checking a station’s voltage limit before buying.
Amazon $322.99Prices 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 | ZOUPW 480W Bifacial Portable Solar Panel N-Type 16BB (ZP-DS480W) | Greenmagic 400W Portable Foldable Solar Panel (GM400B) |
|---|---|---|
| Overall rating | 4.5/5 | 4.3/5 |
| Value 30% | 77 $1.15 per rated watt | 97 $0.81 per rated watt |
| Tested output 20% | 100 not yet tested; estimated 91% of rated watts from 1 test of ZOUPW panels and 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 21.3 W per lb (22.5 lb (10.2 kg)) | 100 18.6 W per lb (21.5 lb (9.8 kg)) |
| Durability 15% | 100 IP68, 3-year warranty | 36 IP65 |
| Efficiency 10% | 100 25.6% claimed efficiency | 75 23.5% claimed efficiency |
| Features 10% | 25 bifacial | 55 built-in kickstand, series/parallel |
| ZOUPW 480W Bifacial Portable Solar Panel N-Type 16BB (ZP-DS480W) | Greenmagic 400W Portable Foldable Solar Panel (GM400B) | |
|---|---|---|
| Output | ||
| Rated power | 480 W | 400 W |
| Tested output | Not tested (estimated 91%) | Not tested (estimated 87%) |
| Efficiency | 25.6% (ZOUPW's 'up to 25.6%' figure, not stated as cell or module; the Amazon listing says 25%+) | 23.5% (the listing gives a 21.5-23.5% range without saying cell or module; the top of the range is recorded) |
| Cells | Monocrystalline (N-type, 16BB, 182 mm cells) | Monocrystalline |
| Bifacial | Yes, up to 144 W more from the back | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 49.3 V | - |
| Voltage at max power (Vmp) | 42.5 V | - |
| Short-circuit current (Isc) | 12 A | - |
| Current at max power (Imp) | 11.3 A | - |
| Series / parallel | - | Yes |
| Connections | ||
| Output connector | - | MC4 |
| Cables included | 13 ft 12AWG solar extension cable, 2 ft 12AWG 4-in-1 adapter cable (DC7909 with DC8020 adapter, XT60, Anderson) | - |
| USB ports | - | None |
| Build | ||
| Weight | 22.5 lb (10.2 kg) | 21.5 lb (9.8 kg) |
| Folded size | 34.65 x 32.56 x 3.35 in (880 x 827 x 85 mm) | 32.09 x 31.30 x 1.97 in |
| Unfolded size | 138.58 x 32.56 x 0.87 in (3520 x 827 x 22 mm) | - |
| Kickstand | - | Yes |
| Water resistance | IP68 | IP65 |
| Warranty | 3 years | - |
