The MHPOWOS 220W 40V Portable Solar Panel (MH-SP-002) is the better portable solar panel overall, rated 4.2 to 4.0. The MHPOWOS 220W 40V Portable Solar Panel (MH-SP-002) leads on value and durability. The EcoFlow NextGen 220W Bifacial Portable Solar Panel wins on portability and efficiency. The MHPOWOS 220W 40V Portable Solar Panel (MH-SP-002) costs $219.01 less ($179.99 vs $399).
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 $179.99The strongest pick here for EcoFlow owners who want the most watts from one folding panel they can still carry easily. Buy it on sale; it rarely sells at full price.
Amazon $399 EcoFlow $399Prices 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) | EcoFlow NextGen 220W Bifacial Portable Solar Panel |
|---|---|---|
| Overall rating | 4.2/5 | 4.0/5 |
| Value 30% | 100 $0.82 per rated watt | 56 $1.81 per rated watt |
| Tested output 20% | 89 not yet tested; estimated 87% of rated watts from the median of the 10 tested panels | 92 best measured 88% of rated watts (1 test) |
| Portability 15% | 48 11.7 W per lb (18.7 lb (8.5 kg)) | 69 14.3 W per lb (15.4 lb (7 kg)) |
| Durability 15% | 70 IP67, 1.5-year warranty | 60 IP68, 1-year warranty |
| Efficiency 10% | 75 23.5% claimed efficiency | 100 25% claimed efficiency |
| Features 10% | 55 built-in kickstand, series/parallel | 60 built-in kickstand, bifacial |
No independent test published yet.
| Tested by | Measured peak | Of rated | Conditions |
|---|---|---|---|
| OutdoorGearLab | 193 W | 88% | Average power over a two-hour charge of a Jackery Explorer 1000 (385 Wh in 2 h), clear day at 6,300 ft, 55-65 °F; OutdoorGearLab reports this as measured watts, not an instantaneous peak |
| MHPOWOS 220W 40V Portable Solar Panel (MH-SP-002) | EcoFlow NextGen 220W Bifacial Portable Solar Panel | |
|---|---|---|
| Output | ||
| Rated power | 220 W | 220 W |
| Tested output | Not tested (estimated 87%) | 193 W (88%) |
| Efficiency | 23.5% (MHPOWOS lists a maximum conversion rate of 23.5% without saying cell or module) | 25% (EcoFlow lists 25.00% efficiency without saying whether it is cell or module efficiency) |
| Cells | Monocrystalline | Monocrystalline (N-type TOPCon) |
| Bifacial | No | Yes, up to 175 W more from the back |
| Electrical | ||
| Open-circuit voltage (Voc) | 48 V | 21.5 V |
| Voltage at max power (Vmp) | 40 V | 18.4 V |
| Short-circuit current (Isc) | 6 A | 12.4 A |
| Current at max power (Imp) | 5.5 A | 11.9 A |
| Series / parallel | Yes | - |
| Connections | ||
| Output connector | MC4 | MC4 |
| Cables included | 7-in-1 solar connector cable (XT60, Anderson, DC7909, DC8020, DC5525, DC5521, DC35135) | MC4 to XT60i |
| USB ports | - | None |
| Build | ||
| Weight | 18.7 lb (8.5 kg) | 15.4 lb (7 kg) |
| Folded size | 23.5 x 21.25 x 2.3 in (59.6 x 54.0 x 5.8 cm) | 24.2 x 23.2 x 1.3 in |
| Unfolded size | 85.2 x 23.5 x 1.1 in (216.3 x 59.6 x 2.8 cm) | 24.2 x 84.8 x 1.0 in |
| Kickstand | Yes | Yes |
| Water resistance | IP67 | IP68 |
| Warranty | 1.5 years | 1 years |
