The Renogy Flex ShadowFlux 100W N-Type Anti-Shading Flexible Solar Panel is the better portable solar panel overall, rated 4.5 to 4.2. The Renogy Flex ShadowFlux 100W N-Type Anti-Shading Flexible Solar Panel leads on portability, durability and efficiency. The ZOUPW 100W Portable Solar Panel (ZOUPW-F100W) wins on features and value. The ZOUPW 100W Portable Solar Panel (ZOUPW-F100W) costs $44 less ($105.99 vs $149.99).
For curved roofs with vents, racks or antennas that shade part of the panel during the day. With clear sun on an open roof, Renogy’s standard 100 W flexible panel costs less.
Amazon $149.99 Renogy $172.99A plug-and-play 100 W panel for owners of small and mid-size power stations who want every common adapter in the box and USB ports for direct charging. Hikers should look at lighter panels.
Amazon $105.99Prices 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 | Renogy Flex ShadowFlux 100W N-Type Anti-Shading Flexible Solar Panel | ZOUPW 100W Portable Solar Panel (ZOUPW-F100W) |
|---|---|---|
| Overall rating | 4.5/5 | 4.2/5 |
| Value 30% | 89 $1.50 per rated watt | 100 $1.06 per rated watt |
| Tested output 20% | 91 not yet tested; estimated 87% of rated watts from 1 test of Renogy panels and the median of the 10 tested panels | 100 not yet tested; estimated 91% of rated watts from 1 test of ZOUPW panels and the median of the 10 tested panels |
| Portability 15% | 100 23.9 W per lb (4.2 lb (1.9 kg)) | 38 10.5 W per lb (9.5 lb (4.3 kg)) |
| Durability 15% | 100 IP68, 3-year warranty | 60 IP67, 1-year warranty |
| Efficiency 10% | 100 25% claimed efficiency | 75 23.5% claimed efficiency |
| Features 10% | 0 no kickstand, USB or bifacial cells | 55 built-in kickstand, USB output |
| Renogy Flex ShadowFlux 100W N-Type Anti-Shading Flexible Solar Panel | ZOUPW 100W Portable Solar Panel (ZOUPW-F100W) | |
|---|---|---|
| Output | ||
| Rated power | 100 W | 100 W |
| Tested output | Not tested (estimated 87%) | Not tested (estimated 91%) |
| Efficiency | 25% (cell efficiency ("up to 25%")) | 23.5% (cell efficiency per ZOUPW's spec table) |
| Cells | Monocrystalline (N-type TOPCon, cell-level bypass diodes (ShadowFlux)) | Monocrystalline |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 33.6 V | 24.3 V |
| Voltage at max power (Vmp) | 28.8 V | 20.2 V |
| Short-circuit current (Isc) | 3.7 A | 5.2 A |
| Current at max power (Imp) | 3.5 A | 5 A |
| Connections | ||
| Cables included | - | 10 ft 5-in-1 solar extension cable (DC8020, XT60, Anderson, DC7909, DC5521) |
| USB ports | None | On the built-in controller: 1x USB-C (up to 15V/3A), 1x USB-A QC3.0 (up to 12V/1.5A), 1x USB-A 5V/3A; the controller pocket is not waterproof |
| Build | ||
| Weight | 4.2 lb (1.9 kg) | 9.5 lb (4.3 kg) |
| Flexible | Yes, bends up to 270° | - |
| Dimensions | 37.09 x 24.13 x 0.10 in | - |
| Folded size | - | 24.13 x 21.06 x 1.77 in (613 x 535 x 45 mm) |
| Unfolded size | - | 48.43 x 21.06 x 0.98 in (1230 x 535 x 25 mm) |
| Kickstand | No | Yes |
| Water resistance | IP68 | IP67 |
| Warranty | 3 years | 1 years |
| Output warranty | 3-year power output warranty | - |
