The ZOUPW 450W Portable Solar Panel N-Type 16BB (ZOUPW-EZ450W) is the better portable solar panel overall, rated 4.5 to 4.3. The ZOUPW 450W Portable Solar Panel N-Type 16BB (ZOUPW-EZ450W) leads on durability and efficiency. The Greenmagic 400W Portable Foldable Solar Panel (GM400B) wins on value, portability and features. The Greenmagic 400W Portable Foldable Solar Panel (GM400B) costs $147 less ($322.99 vs $469.99).
A high-output single panel for owners of large power stations that accept around 50 V of solar input, at RV sites or in home backup. Owners of small or low-voltage stations should look elsewhere.
Amazon $499.99 ZOUPW $469.99A 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 450W Portable Solar Panel N-Type 16BB (ZOUPW-EZ450W) | Greenmagic 400W Portable Foldable Solar Panel (GM400B) |
|---|---|---|
| Overall rating | 4.5/5 | 4.3/5 |
| Value 30% | 83 $1.04 per rated watt | 97 $0.81 per rated watt |
| Tested output 20% | 100 best measured 100% of rated watts (2 tests) | 89 not yet tested; estimated 87% of rated watts from the median of the 10 tested panels |
| Portability 15% | 77 15.3 W per lb (29.5 lb (13.4 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% claimed efficiency | 75 23.5% claimed efficiency |
| Features 10% | 35 built-in kickstand | 55 built-in kickstand, series/parallel |
| Tested by | Measured peak | Of rated | Conditions |
|---|---|---|---|
| Love Your RV | 360 W | 80% | Up to 360 W delivered to a Bluetti Elite 100 power station in a mid-January test; the reviewer blames the low winter sun angle. Measurement method not stated. |
| CleanTechnica | 450 W | 100% | Reviewer reports consistently getting 450 W on sunny days in southwestern New Mexico while charging several large power stations, repositioning the panel through the day. Unit supplied by ZOUPW; metering method not stated. Published December 2025. |
No independent test published yet.
| ZOUPW 450W Portable Solar Panel N-Type 16BB (ZOUPW-EZ450W) | Greenmagic 400W Portable Foldable Solar Panel (GM400B) | |
|---|---|---|
| Output | ||
| Rated power | 450 W | 400 W |
| Tested output | 450 W (100%) | Not tested (estimated 87%) |
| Efficiency | 25% (cell efficiency per ZOUPW's spec table for the 450W Standard) | 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) | Monocrystalline |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 45.9 V | - |
| Voltage at max power (Vmp) | 38.3 V | - |
| Short-circuit current (Isc) | 12.4 A | - |
| Current at max power (Imp) | 11.7 A | - |
| Series / parallel | - | Yes |
| Connections | ||
| Output connector | - | MC4 |
| Cables included | 13 ft 12AWG solar extension cable, 4-in-1 adapter cable (DC7909 with DC8020 adapter, XT60, Anderson) | - |
| USB ports | - | None |
| Build | ||
| Weight | 29.5 lb (13.4 kg) | 21.5 lb (9.8 kg) |
| Folded size | 30.4 x 34.6 x 3.5 in (773 x 878 x 90 mm) | 32.09 x 31.30 x 1.97 in |
| Unfolded size | 121.8 x 34.6 x 0.8 in (3095 x 878 x 20 mm) | - |
| Kickstand | Yes | Yes |
| Water resistance | IP68 | IP65 |
| Warranty | 3 years | - |
