The HQST 100W Ultra-Light Foldable Portable Solar Panel (HPP100N) is the better portable solar panel overall, rated 4.5 to 3.9. The HQST 100W Ultra-Light Foldable Portable Solar Panel (HPP100N) leads on features and efficiency. The FlexSolar S100 100W Foldable Portable Solar Panel wins on portability.
A good-value 100 W panel for owners of small power stations who want something light to set up beside the tent. The short warranty is the main trade-off.
Amazon $89 HQST $89.99A good pick for hikers and car campers who want 100 W-class solar that packs small and weighs about 4 lb. Anyone charging a bigger power station should look at a heavier panel with a stand and published electrical specs.
Amazon $89.99 FlexSolar $89.99Prices 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 | HQST 100W Ultra-Light Foldable Portable Solar Panel (HPP100N) | FlexSolar S100 100W Foldable Portable Solar Panel |
|---|---|---|
| Overall rating | 4.5/5 | 3.9/5 |
| Value 30% | 100 $0.89 per rated watt | 100 $0.90 per rated watt |
| Tested output 20% | 89 not yet tested; estimated 87% of rated watts from the median of the 10 tested panels | 33 best measured 70% of rated watts (1 test) |
| Portability 15% | 91 16.9 W per lb (5.9 lb (2.7 kg)) | 100 24.4 W per lb (4.1 lb (1.9 kg)) |
| Durability 15% | 60 IP67, 1-year warranty | 60 IP67 |
| Efficiency 10% | 100 25% claimed efficiency | 67 23% claimed efficiency |
| Features 10% | 55 built-in kickstand, series/parallel | 0 no kickstand, USB or bifacial cells |
No independent test published yet.
| Tested by | Measured peak | Of rated | Conditions |
|---|---|---|---|
| OutdoorGearLab | 70 W | 70% | OutdoorGearLab’s measured-watts figure from its charging test (70 W generated in one hour); panel lay flat, exact sun conditions not given |
| HQST 100W Ultra-Light Foldable Portable Solar Panel (HPP100N) | FlexSolar S100 100W Foldable Portable Solar Panel | |
|---|---|---|
| Output | ||
| Rated power | 100 W | 100 W |
| Tested output | Not tested (estimated 87%) | 70 W (70%) |
| Efficiency | 25% (conversion rate quoted by HQST as up to 25% cell efficiency) | 23% (Amazon listing claims 23%+ conversion efficiency without saying cell or module; FlexSolar's own page gives no figure) |
| Cells | Monocrystalline (N-type TOPCon, 16BB) | Monocrystalline |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 20.7 V | - |
| Voltage at max power (Vmp) | 18 V | - |
| Short-circuit current (Isc) | 6.4 A | - |
| Current at max power (Imp) | 5.6 A | - |
| Series / parallel | Yes | - |
| Connections | ||
| Output connector | MC4 | - |
| Cables included | 4.9 ft 3-in-1 adapter cable (XT60, DC7909, DC5521) | 2 m 4-in-1 DC adapter cable (Anderson, XT60, DC7909, DC5521) |
| USB ports | None | - |
| Build | ||
| Weight | 5.9 lb (2.7 kg) | 4.1 lb (1.9 kg) |
| Folded size | 23.94 x 20.47 x 1.38 in (608 x 520 x 35 mm) | 12.99 x 10.43 x 2.17 in (330 x 265 x 55 mm) |
| Unfolded size | 36.85 x 23.94 x 0.12 in (936 x 608 x 3 mm) | 45.47 x 26.18 x 0.59 in (1155 x 665 x 15 mm) |
| Folding sections | - | 10 |
| Kickstand | Yes | No |
| Water resistance | IP67 | IP67 |
| Warranty | 1 years | - |
