The GEYOTO S200 200W Bifacial Portable Solar Panel is the better portable solar panel overall, rated 4.5 to 4.4. The GEYOTO S200 200W Bifacial Portable Solar Panel leads on durability. The Renogy E.Flex 200W N-Type Portable Solar Panel wins on features and portability.
A bifacial 200 W panel for car campers and RV owners with an XT60-input power station, where the reflective case can add some extra output. Not one to carry far.
Amazon $219.99 GEYOTO $259.99A strong all-round 200 W folding panel for power-station owners who want real output close to the rating and USB ports for direct charging. Budget for an MC4 adapter if your station doesn’t take MC4.
Amazon $219.99 Renogy $219.99Prices 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 | GEYOTO S200 200W Bifacial Portable Solar Panel | Renogy E.Flex 200W N-Type Portable Solar Panel |
|---|---|---|
| Overall rating | 4.5/5 | 4.4/5 |
| Value 30% | 90 $1.10 per rated watt | 90 $1.10 per rated watt |
| Tested output 20% | 89 not yet tested; estimated 87% of rated watts from the median of the 10 tested panels | 95 best measured 88% of rated watts (1 test) |
| Portability 15% | 61 13.3 W per lb (15 lb (6.8 kg)) | 70 14.4 W per lb (13.9 lb (6.3 kg)) |
| Durability 15% | 100 IP68, 3-year warranty | 56 IP65, 2-year warranty |
| Efficiency 10% | 100 26% claimed efficiency | 100 25% claimed efficiency |
| Features 10% | 60 built-in kickstand, bifacial | 75 built-in kickstand, USB output, series/parallel |
No independent test published yet.
| Tested by | Measured peak | Of rated | Conditions |
|---|---|---|---|
| OutdoorGearLab | 177 W | 88% | Measured output in a two-hour test on a sunny day in California at 6,500 ft; the power station’s own readout averaged 192 W across charging tests. Review published July 2026. |
| GEYOTO S200 200W Bifacial Portable Solar Panel | Renogy E.Flex 200W N-Type Portable Solar Panel | |
|---|---|---|
| Output | ||
| Rated power | 200 W | 200 W |
| Tested output | Not tested (estimated 87%) | 177 W (88%) |
| Efficiency | 26% (cell efficiency per GEYOTO's product description) | 25% (cell efficiency, listed as >25% in Renogy's spec table) |
| Cells | Monocrystalline (N-type) | Monocrystalline (N-type, 16BB) |
| Bifacial | Yes | No |
| Electrical | ||
| Open-circuit voltage (Voc) | - | 21.6 V |
| Voltage at max power (Vmp) | 25.2 V | 18.8 V |
| Short-circuit current (Isc) | - | 11.3 A |
| Current at max power (Imp) | 7.9 A | 10.6 A |
| Series / parallel | - | Yes |
| Connections | ||
| Output connector | MC4 | MC4 |
| Cables included | 10 ft (3 m) MC4 to XT60 cable, reflective EVA carrying case | - |
| USB ports | None | 1x USB-C PD 45W, 2x USB-A |
| Build | ||
| Weight | 15 lb (6.8 kg) | 13.9 lb (6.3 kg) |
| Folded size | 20.6 x 26.5 x 1.1 in (522 x 673 x 28 mm) | 23.72 x 22.99 x 1.97 in |
| Unfolded size | 82.2 x 26.5 x 1.1 in (2088 x 673 x 28 mm) | 87.80 x 22.99 x 0.12 in |
| Kickstand | Yes | Yes |
| Water resistance | IP68 | IP65 |
| Warranty | 3 years | 2 years |
