The Renogy E.Flex 200W N-Type Portable Solar Panel is the better portable solar panel overall, rated 4.4 to 2.9. The Renogy E.Flex 200W N-Type Portable Solar Panel leads on value, portability and durability. The Renogy E.Flex 200W N-Type Portable Solar Panel costs $210.01 less ($219.99 vs $430).
A 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 $219.99A 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 | Renogy E.Flex 200W N-Type Portable Solar Panel | Goal Zero Boulder 200 Briefcase Solar Panel |
|---|---|---|
| Overall rating | 4.4/5 | 2.9/5 |
| Value 30% | 90 $1.10 per rated watt | 40 $2.15 per rated watt |
| Tested output 20% | 95 best measured 88% of rated watts (1 test) | 77 best measured 83% of rated watts (1 test) |
| Portability 15% | 70 14.4 W per lb (13.9 lb (6.3 kg)) | 0 4.8 W per lb (42 lb (19 kg)) |
| Durability 15% | 56 IP65, 2-year warranty | 20 no IP rating, 2-year warranty |
| Efficiency 10% | 100 25% claimed efficiency | 50 efficiency not published (neutral score used) |
| Features 10% | 75 built-in kickstand, USB output, series/parallel | 35 built-in kickstand |
| 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. |
| 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 |
| Renogy E.Flex 200W N-Type Portable Solar Panel | Goal Zero Boulder 200 Briefcase Solar Panel | |
|---|---|---|
| Output | ||
| Rated power | 200 W | 200 W |
| Tested output | 177 W (88%) | 166 W (83%) |
| Efficiency | 25% (cell efficiency, listed as >25% in Renogy's spec table) | - |
| Cells | Monocrystalline (N-type, 16BB) | Monocrystalline |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 21.6 V | 21.8 V |
| Voltage at max power (Vmp) | 18.8 V | 18.1 V |
| Short-circuit current (Isc) | 11.3 A | - |
| Current at max power (Imp) | 10.6 A | - |
| Series / parallel | Yes | - |
| Connections | ||
| Output connector | MC4 | HPP (Goal Zero High Power Port) |
| USB ports | 1x USB-C PD 45W, 2x USB-A | None |
| Build | ||
| Weight | 13.9 lb (6.3 kg) | 42 lb (19 kg) |
| Folded size | 23.72 x 22.99 x 1.97 in | 40 x 26.75 x 3.5 in |
| Unfolded size | 87.80 x 22.99 x 0.12 in | 40 x 53.5 x 1.75 in |
| Folding sections | - | 2 |
| Kickstand | Yes | Yes |
| Water resistance | IP65 | - |
| Warranty | 2 years | 2 years |
