A dependable, low-voltage 100 W briefcase panel for small power stations, with adapters for most older barrel and Anderson inputs. Owners of XT60 stations should budget for an adapter.
Price checked October 21, 2026. As an Amazon Associate we earn from qualifying purchases.
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
The most power independent reviewers measured from the panel in real sun. Heat, haze, sun angle and the device being charged all cut output, so 70-85% of the rated watts is a normal real-world result.
| Tested by | Measured peak | Of rated | Conditions |
|---|---|---|---|
| The Gadgeteer | 100 W | 100% | Reviewer saw the wattage ‘jump right to 100+ watts’ and hold there on a winter day, kickstands angled for the low sun, charging a GRECELL T-500 power station; metering method not stated. Review published December 2022. |
| Output | |
|---|---|
| Rated power | 100 W |
| Tested output | 100 W (100%) |
| Efficiency | 23.5% (cell efficiency per GRECELL's SP-100 spec table (grecell.com product feed)) |
| Cells | Monocrystalline |
| Bifacial | No |
| Electrical | |
| Open-circuit voltage (Voc) | 23.9 V |
| Voltage at max power (Vmp) | 20 V |
| Short-circuit current (Isc) | 5.2 A |
| Current at max power (Imp) | 5 A |
| Series / parallel | Yes |
| Connections | |
| Output connector | MC4 |
| Cables included | MC4 to Anderson cable, MC4 to DC5521 cable, DC5521 to DC5525 adapter, DC5521 to DC7909 (8 mm) adapter, DC5521 to DC3515 adapter |
| Build | |
| Weight | 9.8 lb (4.5 kg) |
| Folded size | 25.2 x 21.1 x 2.5 in (640 x 536 x 65 mm) |
| Unfolded size | 50.55 x 21.1 x 0.2 in (1284 x 536 x 5 mm) |
| Kickstand | Yes |
A light backpacking panel for charging a laptop, phone or small power station directly over USB-C. Too small for refilling a mid-size or large power station.
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