A 400 W folding panel for owners of large power stations that accept around 50 V of solar input. Small-station owners need a lower-voltage panel.
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.
| Output | |
|---|---|
| Rated power | 400 W |
| Tested output | Not tested (estimated 87%) |
| Efficiency | 24% (cell efficiency per the Amazon listing) |
| Cells | Monocrystalline |
| Bifacial | No |
| Electrical | |
| Open-circuit voltage (Voc) | 46.9 V |
| Voltage at max power (Vmp) | 40 V |
| Short-circuit current (Isc) | 10.6 A |
| Current at max power (Imp) | 10 A |
| Connections | |
| Output connector | MC4 |
| Cables included | 9.8 ft 5-in-1 MC4 cable (Anderson, XT60, DC8020, DC7909, DC5521), 3 DC adapters |
| Build | |
| Weight | 22.7 lb (10.3 kg) |
| Folded size | 26 x 35.5 in |
| Unfolded size | 35.5 x 98.5 in |
| Kickstand | Yes |
| Water resistance | IP65 |
| Warranty | 2 years |
For owners of large power stations who want 400 W from a single panel they can still carry. It is much lighter than older 400 W folding panels.
Amazon $599.98 Anker SOLIX $699.99A low-cost 400 W folding panel for owners of large power stations who camp by the car or RV. The thin spec sheet means checking a station’s voltage limit before buying.
Amazon $322.99For van, truck and SUV campers who want 400 W from something that stows like a backpack. Owners of small power stations should check the voltage limit, and anyone who wants to prop a panel up on legs should look at a folding suitcase panel instead.
Amazon $469.99 Renogy $469.99Compare the TWELSEAVAN 400W Portable Solar Panel with any other portable solar panel →
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