The ZOUPW 100W Lightweight Foldable Solar Panel (ZOUPW-QZ100W) is the better portable solar panel overall, rated 4.4 to 4.2. The ZOUPW 100W Lightweight Foldable Solar Panel (ZOUPW-QZ100W) leads on efficiency and features. The Renogy Black Division 100W Lightweight Flexible Solar Panel (RSP100DL-36) wins on portability and durability. The ZOUPW 100W Lightweight Foldable Solar Panel (ZOUPW-QZ100W) costs $4.50 less ($99.99 vs $104.49).
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 low-profile 100 W panel for curved or weight-limited van, RV and boat roofs, especially where an all-black look matters. On a flat roof that can take the weight, a rigid panel lasts longer for less money.
Amazon $104.49 Renogy $139.99Prices 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 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) | Renogy Black Division 100W Lightweight Flexible Solar Panel (RSP100DL-36) |
|---|---|---|
| Overall rating | 4.4/5 | 4.2/5 |
| Value 30% | 100 $1.00 per rated watt | 100 $1.04 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 | 91 not yet tested; estimated 87% of rated watts from 1 test of Renogy panels and the median of the 10 tested panels |
| Portability 15% | 54 12.5 W per lb (8 lb (3.6 kg)) | 100 18.9 W per lb (5.3 lb (2.4 kg)) |
| Durability 15% | 60 IP67, 1-year warranty | 100 IP67, 5-year warranty |
| Efficiency 10% | 100 25% claimed efficiency | 0 15.7% claimed efficiency |
| Features 10% | 55 built-in kickstand, USB output | 0 no kickstand, USB or bifacial cells |
| ZOUPW 100W Lightweight Foldable Solar Panel (ZOUPW-QZ100W) | Renogy Black Division 100W Lightweight Flexible Solar Panel (RSP100DL-36) | |
|---|---|---|
| Output | ||
| Rated power | 100 W | 100 W |
| Tested output | Not tested (estimated 91%) | Not tested (estimated 87%) |
| Efficiency | 25% (cell efficiency per ZOUPW) | 15.7% (module efficiency per Renogy's spec table; the Amazon listing quotes 22%) |
| Cells | Monocrystalline (N-type, 16BB, 182 mm cells) | Monocrystalline (half-cut PERC) |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 23.8 V | 23.5 V |
| Voltage at max power (Vmp) | 19.8 V | 19.4 V |
| Short-circuit current (Isc) | 5.3 A | 5.5 A |
| Current at max power (Imp) | 5 A | 5.2 A |
| Connections | ||
| Output connector | 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 | - |
| 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 | None |
| Build | ||
| Weight | 8 lb (3.6 kg) | 5.3 lb (2.4 kg) |
| Flexible | - | Yes, bends up to 240° |
| Dimensions | - | 43.0 x 22.9 x 0.8 in (1093.0 x 582.0 x 20.5 mm) |
| Folded size | 23.38 x 23.22 x 1.77 in (594 x 590 x 45 mm) | - |
| Unfolded size | 46.85 x 23.23 x 0.98 in (1190 x 590 x 25 mm) | - |
| Kickstand | Yes | No |
| Water resistance | IP67 | IP67 |
| Warranty | 1 years | 5 years |
| Output warranty | - | 5-year output warranty |
