Renogy 300W N-Type Suitcase (RSP300LSC)
#2 in LargeFull review
For car campers and RV owners with a mid-size power station who want 300 W from one panel without a 30 lb carry. Budget for an MC4 adapter cable.
Amazon $386.99$386.99
The Renogy 300W N-Type Suitcase (RSP300LSC) is the better portable solar panel overall, rated 4.4 to 4.3. The Renogy 300W N-Type Suitcase (RSP300LSC) leads on durability, features and efficiency. The TWELSEAVAN 400W Portable wins on value and portability. The Renogy 300W N-Type Suitcase (RSP300LSC) costs $13 less ($386.99 vs $399.99).
TWELSEAVAN 400W Portable
#4 in LargeFull review
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.
Amazon $399.99$399.99
Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Renogy 300W N-Type Suitcase (RSP300LSC) for durability (IP67, 3-year warranty vs IP65, 2-year warranty), features (built-in kickstand, series/parallel vs built-in kickstand) and efficiency (24.8% claimed efficiency vs 24% claimed efficiency).
- Choose the TWELSEAVAN 400W Portable for value ($1.00 per rated watt vs $1.29 per rated watt) and portability (17.6 W per lb (22.7 lb (10.3 kg)) vs 16.0 W per lb (18.7 lb (8.5 kg))).
Scores side by side
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 300W N-Type Suitcase (RSP300LSC) | TWELSEAVAN 400W Portable |
|---|---|---|
| Overall rating | 4.4/5 | 4.3/5 |
| Value 30% | 69 $1.29 per rated watt | 86 $1.00 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% | 83 16.0 W per lb (18.7 lb (8.5 kg)) | 97 17.6 W per lb (22.7 lb (10.3 kg)) |
| Durability 15% | 100 IP67, 3-year warranty | 56 IP65, 2-year warranty |
| Efficiency 10% | 97 24.8% claimed efficiency | 83 24% claimed efficiency |
| Features 10% | 55 built-in kickstand, series/parallel | 35 built-in kickstand |
Specifications
| Renogy 300W N-Type Suitcase (RSP300LSC) | TWELSEAVAN 400W Portable | |
|---|---|---|
| Output | ||
| Rated power | 300 W | 400 W |
| Tested output | Not tested (estimated 91%) | Not tested (estimated 88%) |
| Efficiency | 24.8% (cell efficiency per Renogy's spec table, which lists module efficiency as 17.0%; marketing copy rounds it to 25%) | 24% (cell efficiency per the Amazon listing) |
| Cells | Monocrystalline (N-type, 16BB) | Monocrystalline |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 30 V | 46.9 V |
| Voltage at max power (Vmp) | 25.2 V | 40 V |
| Short-circuit current (Isc) | 12.6 A | 10.6 A |
| Current at max power (Imp) | 11.9 A | 10 A |
| Series / parallel | Yes | - |
| Connections | ||
| Output connector | MC4 | MC4 |
| Cables included | - | 9.8 ft 5-in-1 MC4 cable (Anderson, XT60, DC8020, DC7909, DC5521), 3 DC adapters |
| USB ports | None | - |
| Build | ||
| Weight | 18.7 lb (8.5 kg) | 22.7 lb (10.3 kg) |
| Folded size | 23.2 x 29.3 x 3.2 in (588 x 745 x 80 mm) | 26 x 35.5 in |
| Unfolded size | 2358 x 745 x 20 mm | 35.5 x 98.5 in |
| Kickstand | Yes | Yes |
| Water resistance | IP67 | IP65 |
| Warranty | 3 years | 2 years |
| Output warranty | 3-year power output warranty | - |
| Released | 2025-09 | - |