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 portability, efficiency and features. The SinKeu 40W Foldable Solar Panel costs $43.01 less ($45.99 vs $89).
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 small, cheap panel for keeping phones, tablets and a small power station topped up on hikes or short trips. Anyone charging a mid-size station should look at 100 W and up.
Amazon $45.99Prices 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) | SinKeu 40W Foldable Solar Panel |
|---|---|---|
| Overall rating | 4.5/5 | 3.9/5 |
| Value 30% | 100 $0.89 per rated watt | 100 $1.15 per rated watt |
| Tested output 20% | 89 not yet tested; estimated 87% of rated watts from the median of the 10 tested panels | 89 not yet tested; estimated 87% of rated watts from the median of the 10 tested panels |
| Portability 15% | 91 16.9 W per lb (5.9 lb (2.7 kg)) | 51 12.1 W per lb (3.3 lb (1.5 kg)) |
| Durability 15% | 60 IP67, 1-year warranty | 50 IP rating and warranty not published (neutral score used) |
| Efficiency 10% | 100 25% claimed efficiency | 50 22% claimed efficiency |
| Features 10% | 55 built-in kickstand, series/parallel | 20 USB output |
| HQST 100W Ultra-Light Foldable Portable Solar Panel (HPP100N) | SinKeu 40W Foldable Solar Panel | |
|---|---|---|
| Output | ||
| Rated power | 100 W | 40 W |
| Tested output | Not tested (estimated 87%) | Not tested (estimated 87%) |
| Efficiency | 25% (conversion rate quoted by HQST as up to 25% cell efficiency) | 22% ("up to" per the Amazon listing, not stated as cell or module) |
| 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) | DC-to-DC cable, 10-in-1 DC connector set |
| USB ports | None | 1x USB-C (5V/3A, 9V/3A, 12V/2.5A, 15V/2A), 1x USB-A QC3.0 (5V/3A, 9V/2A, 12V/1.5A), plus an 18 V DC output |
| Build | ||
| Weight | 5.9 lb (2.7 kg) | 3.3 lb (1.5 kg) |
| Folded size | 23.94 x 20.47 x 1.38 in (608 x 520 x 35 mm) | 12.6 x 9.1 x 2 in |
| Unfolded size | 36.85 x 23.94 x 0.12 in (936 x 608 x 3 mm) | 37.8 x 12.6 x 0.2 in |
| Kickstand | Yes | - |
| Water resistance | IP67 | - |
| Warranty | 1 years | - |
