The MHPOWOS 220W 40V Portable Solar Panel (MH-SP-002) is the better portable solar panel overall, rated 4.2 to 4.2. The MHPOWOS 220W 40V Portable Solar Panel (MH-SP-002) leads on features and durability. The ECO-WORTHY 260W (2 x 130W) 18BB Flexible Solar Panel 2-Pack wins on efficiency. The ECO-WORTHY 260W (2 x 130W) 18BB Flexible Solar Panel 2-Pack costs $43 less ($136.99 vs $179.99).
A good fit for owners of mid-size and larger power stations whose solar input accepts around 50 V, where the higher voltage helps on long cable runs. Check your station’s input voltage limit before buying.
Amazon $189.99 MHPOWOS $179.99A cheap pair of flexible panels for curved van, boat or trailer roofs with room for two medium sheets. Buy direct from ECO-WORTHY, where the pair currently costs less than on Amazon.
Amazon $161.44 ECO-WORTHY $136.99Prices 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 mid-size portable solar panel; a clear win is highlighted. How we rank explains each one.
| Factor weight | MHPOWOS 220W 40V Portable Solar Panel (MH-SP-002) | ECO-WORTHY 260W (2 x 130W) 18BB Flexible Solar Panel 2-Pack |
|---|---|---|
| Overall rating | 4.2/5 | 4.2/5 |
| Value 30% | 100 $0.82 per rated watt | 100 $0.53 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% | 48 11.7 W per lb (18.7 lb (8.5 kg)) | 50 weight not published (neutral score used) |
| Durability 15% | 70 IP67, 1.5-year warranty | 60 IP68 |
| Efficiency 10% | 75 23.5% claimed efficiency | 100 25% claimed efficiency |
| Features 10% | 55 built-in kickstand, series/parallel | 20 series/parallel |
| MHPOWOS 220W 40V Portable Solar Panel (MH-SP-002) | ECO-WORTHY 260W (2 x 130W) 18BB Flexible Solar Panel 2-Pack | |
|---|---|---|
| Output | ||
| Rated power | 220 W | 260 W |
| Tested output | Not tested (estimated 87%) | Not tested (estimated 87%) |
| Efficiency | 23.5% (MHPOWOS lists a maximum conversion rate of 23.5% without saying cell or module) | 25% (the Amazon listing labels it module efficiency; ECO-WORTHY's spec table gives none) |
| Cells | Monocrystalline | Monocrystalline (18BB) |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 48 V | 24.5 V |
| Voltage at max power (Vmp) | 40 V | 21.1 V |
| Short-circuit current (Isc) | 6 A | 6.5 A |
| Current at max power (Imp) | 5.5 A | 6.2 A |
| Voc temperature coefficient | - | -0.4%/°C |
| Series / parallel | Yes | Yes |
| Connections | ||
| Output connector | MC4 | MC4 |
| Cables included | 7-in-1 solar connector cable (XT60, Anderson, DC7909, DC8020, DC5525, DC5521, DC35135) | 2.95 ft (90 cm) 11 AWG MC4 leads on each panel |
| USB ports | - | None |
| Build | ||
| Weight | 18.7 lb (8.5 kg) | - |
| Flexible | - | Yes, bends up to 270° per the Amazon listing |
| Dimensions | - | 37.8 x 27.16 x 0.1 in (960 x 690 x 2.5 mm, each panel) |
| Folded size | 23.5 x 21.25 x 2.3 in (59.6 x 54.0 x 5.8 cm) | - |
| Unfolded size | 85.2 x 23.5 x 1.1 in (216.3 x 59.6 x 2.8 cm) | - |
| Folding sections | - | 2 |
| Kickstand | Yes | No |
| Water resistance | IP67 | IP68 |
| Warranty | 1.5 years | - |
