The GEYOTO S200 200W Bifacial Portable Solar Panel is the better portable solar panel overall, rated 4.5 to 2.9. The GEYOTO S200 200W Bifacial Portable Solar Panel leads on value, durability and portability. The GEYOTO S200 200W Bifacial Portable Solar Panel costs $210.01 less ($219.99 vs $430).
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 tough glass-and-aluminum 200 W panel for RV, van and base-camp use where it stays put. If you need to carry it any distance, a fabric folding panel weighs half as much.
Amazon $430 Goal Zero $599.95Prices 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 | Goal Zero Boulder 200 Briefcase Solar Panel |
|---|---|---|
| Overall rating | 4.5/5 | 2.9/5 |
| Value 30% | 90 $1.10 per rated watt | 40 $2.15 per rated watt |
| Tested output 20% | 89 not yet tested; estimated 87% of rated watts from the median of the 10 tested panels | 77 best measured 83% of rated watts (1 test) |
| Portability 15% | 61 13.3 W per lb (15 lb (6.8 kg)) | 0 4.8 W per lb (42 lb (19 kg)) |
| Durability 15% | 100 IP68, 3-year warranty | 20 no IP rating, 2-year warranty |
| Efficiency 10% | 100 26% claimed efficiency | 50 efficiency not published (neutral score used) |
| Features 10% | 60 built-in kickstand, bifacial | 35 built-in kickstand |
No independent test published yet.
| Tested by | Measured peak | Of rated | Conditions |
|---|---|---|---|
| GearLab (OutdoorGearLab) | 166 W | 83% | hourly average over a two-hour side-by-side test, charging an identical Jackery power station; review dated 2026-07-13 |
| GEYOTO S200 200W Bifacial Portable Solar Panel | Goal Zero Boulder 200 Briefcase Solar Panel | |
|---|---|---|
| Output | ||
| Rated power | 200 W | 200 W |
| Tested output | Not tested (estimated 87%) | 166 W (83%) |
| Efficiency | 26% (cell efficiency per GEYOTO's product description) | - |
| Cells | Monocrystalline (N-type) | Monocrystalline |
| Bifacial | Yes | No |
| Electrical | ||
| Open-circuit voltage (Voc) | - | 21.8 V |
| Voltage at max power (Vmp) | 25.2 V | 18.1 V |
| Current at max power (Imp) | 7.9 A | - |
| Connections | ||
| Output connector | MC4 | HPP (Goal Zero High Power Port) |
| Cables included | 10 ft (3 m) MC4 to XT60 cable, reflective EVA carrying case | - |
| USB ports | None | None |
| Build | ||
| Weight | 15 lb (6.8 kg) | 42 lb (19 kg) |
| Folded size | 20.6 x 26.5 x 1.1 in (522 x 673 x 28 mm) | 40 x 26.75 x 3.5 in |
| Unfolded size | 82.2 x 26.5 x 1.1 in (2088 x 673 x 28 mm) | 40 x 53.5 x 1.75 in |
| Folding sections | - | 2 |
| Kickstand | Yes | Yes |
| Water resistance | IP68 | - |
| Warranty | 3 years | 2 years |
