Renogy 300W N-Type Suitcase (RSP300LSC)
#3 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 and efficiency. The Greenmagic 400W (GM400B) wins on value and portability. The Greenmagic 400W (GM400B) costs $71 less ($315.99 vs $386.99).
Greenmagic 400W (GM400B)
#4 in LargeFull review
A 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 $315.99$315.99
Prices were last checked October 26, 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) and efficiency (24.8% claimed efficiency vs 23.5% claimed efficiency).
- Choose the Greenmagic 400W (GM400B) for value ($0.79 per rated watt vs $1.29 per rated watt) and portability (18.6 W per lb (21.5 lb (9.8 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) | Greenmagic 400W (GM400B) |
|---|---|---|
| Overall rating | 4.4/5 | 4.3/5 |
| Value 30% | 69 $1.29 per rated watt | 98 $0.79 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)) | 100 18.6 W per lb (21.5 lb (9.8 kg)) |
| Durability 15% | 100 IP67, 3-year warranty | 36 IP65 |
| Efficiency 10% | 97 24.8% claimed efficiency | 75 23.5% claimed efficiency |
| Features 10% | 55 built-in kickstand, series/parallel | 55 built-in kickstand, series/parallel |
Specifications
| Renogy 300W N-Type Suitcase (RSP300LSC) | Greenmagic 400W (GM400B) | |
|---|---|---|
| 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%) | 23.5% (the listing gives a 21.5-23.5% range without saying cell or module; the top of the range is recorded) |
| Cells | Monocrystalline (N-type, 16BB) | Monocrystalline |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 30 V | - |
| Voltage at max power (Vmp) | 25.2 V | - |
| Short-circuit current (Isc) | 12.6 A | - |
| Current at max power (Imp) | 11.9 A | - |
| Series / parallel | Yes | Yes |
| Connections | ||
| Output connector | MC4 | MC4 |
| USB ports | None | None |
| Build | ||
| Weight | 18.7 lb (8.5 kg) | 21.5 lb (9.8 kg) |
| Folded size | 23.2 x 29.3 x 3.2 in (588 x 745 x 80 mm) | 32.09 x 31.30 x 1.97 in |
| Unfolded size | 2358 x 745 x 20 mm | - |
| Kickstand | Yes | Yes |
| Water resistance | IP67 | IP65 |
| Warranty | 3 years | - |
| Output warranty | 3-year power output warranty | - |
| Released | 2025-09 | 2025-09 |