The Renogy 400W Blanket is the better portable solar panel overall, rated 4.2 to 4.0. The Renogy 400W Blanket leads on durability and efficiency. The CTOLITY 400W Portable (400W-NEW) wins on value and features. The CTOLITY 400W Portable (400W-NEW) costs $180 less ($289.99 vs $469.99).
For 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 $469.99A low-priced 400 W folding panel, but its listing is too thin and inconsistent to recommend over better-documented panels until CTOLITY publishes full specs.
Amazon $289.99Prices were last checked October 24, 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 large portable solar panel; a clear win is highlighted. How we rank explains each one.
| Factor weight | Renogy 400W Blanket | CTOLITY 400W Portable (400W-NEW) |
|---|---|---|
| Overall rating | 4.2/5 | 4.0/5 |
| Value 30% | 76 $1.17 per rated watt | 100 $0.72 per rated watt |
| Tested output 20% | 100 not yet tested; estimated 91% of rated watts from 2 tests of Renogy panels and the median of the 11 tested panels | 92 not yet tested; estimated 88% of rated watts from the median of the 11 tested panels |
| Portability 15% | 100 24.9 W per lb (16.1 lb (7.3 kg)) | 50 weight not published (neutral score used) |
| Durability 15% | 56 IP65, 2-year warranty | 36 IP65 |
| Efficiency 10% | 100 25% claimed efficiency | 73 23.4% claimed efficiency |
| Features 10% | 20 series/parallel | 35 built-in kickstand |
| Renogy 400W Blanket | CTOLITY 400W Portable (400W-NEW) | |
|---|---|---|
| Output | ||
| Rated power | 400 W | 400 W |
| Tested output | Not tested (estimated 91%) | Not tested (estimated 88%) |
| Efficiency | 25% (cell efficiency as quoted by Renogy and on the Amazon listing; the manual gives no efficiency figure) | 23.4% (conversion efficiency from the Amazon listing's description, not stated as cell or module; the listing title says 23%) |
| Cells | Monocrystalline (N-type, 16BB) | Monocrystalline |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 39.2 V | - |
| Voltage at max power (Vmp) | 33.6 V | - |
| Short-circuit current (Isc) | 13.1 A | - |
| Current at max power (Imp) | 11.9 A | - |
| Series / parallel | Yes | - |
| Connections | ||
| Output connector | MC4 | MC4 |
| USB ports | None | - |
| Build | ||
| Weight | 16.1 lb (7.3 kg) | - |
| Folded size | 16.54 x 15.83 x 4.13 in | - |
| Unfolded size | 64.96 x 62.99 x 1.50 in | - |
| Kickstand | - | Yes |
| Water resistance | IP65 | IP65 |
| Warranty | 2 years | - |
| Released | 2025-04 | - |
