The ZOUPW 100W Lightweight Foldable Solar Panel (ZOUPW-QZ100W) is the better portable solar panel overall, rated 4.4 to 4.1. The ZOUPW 100W Lightweight Foldable Solar Panel (ZOUPW-QZ100W) leads on portability and efficiency. The ZOUPW 100W Lightweight Foldable Solar Panel (ZOUPW-QZ100W) costs $9.99 less ($99.99 vs $109.98).
A plug-and-play 100 W panel for owners of small power stations who want every common adapter in the box and USB ports for direct charging. It is about 1.5 lb lighter than ZOUPW’s older F100W.
Amazon $99.99 ZOUPW $109.99A dependable, low-voltage 100 W briefcase panel for small power stations, with adapters for most older barrel and Anderson inputs. Owners of XT60 stations should budget for an adapter.
Amazon $109.98Prices 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 small portable solar panel; a clear win is highlighted. How we rank explains each one.
| Factor weight | ZOUPW 100W Lightweight Foldable Solar Panel (ZOUPW-QZ100W) | GRECELL 100W Portable Solar Panel (SP-100) |
|---|---|---|
| Overall rating | 4.4/5 | 4.1/5 |
| Value 30% | 100 $1.00 per rated watt | 100 $1.10 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 | 100 best measured 100% of rated watts (1 test) |
| Portability 15% | 54 12.5 W per lb (8 lb (3.6 kg)) | 35 10.2 W per lb (9.8 lb (4.5 kg)) |
| Durability 15% | 60 IP67, 1-year warranty | 50 IP rating and warranty not published (neutral score used) |
| Efficiency 10% | 100 25% claimed efficiency | 75 23.5% claimed efficiency |
| Features 10% | 55 built-in kickstand, USB output | 55 built-in kickstand, series/parallel |
No independent test published yet.
| Tested by | Measured peak | Of rated | Conditions |
|---|---|---|---|
| The Gadgeteer | 100 W | 100% | Reviewer saw the wattage ‘jump right to 100+ watts’ and hold there on a winter day, kickstands angled for the low sun, charging a GRECELL T-500 power station; metering method not stated. Review published December 2022. |
| ZOUPW 100W Lightweight Foldable Solar Panel (ZOUPW-QZ100W) | GRECELL 100W Portable Solar Panel (SP-100) | |
|---|---|---|
| Output | ||
| Rated power | 100 W | 100 W |
| Tested output | Not tested (estimated 91%) | 100 W (100%) |
| Efficiency | 25% (cell efficiency per ZOUPW) | 23.5% (cell efficiency per GRECELL's SP-100 spec table (grecell.com product feed)) |
| Cells | Monocrystalline (N-type, 16BB, 182 mm cells) | Monocrystalline |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 23.8 V | 23.9 V |
| Voltage at max power (Vmp) | 19.8 V | 20 V |
| Short-circuit current (Isc) | 5.3 A | 5.2 A |
| Current at max power (Imp) | 5 A | 5 A |
| Series / parallel | - | Yes |
| Connections | ||
| Output connector | MC4 | MC4 |
| Cables included | 10 ft MC4 extension cable with XT60, Anderson, DC7909 and DC5521 ends plus a DC8020 adapter, 10-in-1 DC5521 adapter set | MC4 to Anderson cable, MC4 to DC5521 cable, DC5521 to DC5525 adapter, DC5521 to DC7909 (8 mm) adapter, DC5521 to DC3515 adapter |
| USB ports | On the built-in controller: 1x USB-C (5/9/12/15 V at 3 A; ZOUPW's site also lists 20 V/2.25 A, 45 W max), 1x USB-A 5V/3A, 1x USB-A up to 12V/1.5A; the controller is not water-resistant | - |
| Build | ||
| Weight | 8 lb (3.6 kg) | 9.8 lb (4.5 kg) |
| Folded size | 23.38 x 23.22 x 1.77 in (594 x 590 x 45 mm) | 25.2 x 21.1 x 2.5 in (640 x 536 x 65 mm) |
| Unfolded size | 46.85 x 23.23 x 0.98 in (1190 x 590 x 25 mm) | 50.55 x 21.1 x 0.2 in (1284 x 536 x 5 mm) |
| Kickstand | Yes | Yes |
| Water resistance | IP67 | - |
| Warranty | 1 years | - |
