Rich Solar MEGA 100 Slim
#5 in Under 150 WFull review
The panel to buy when a van or RV roof only has a long, narrow gap to fill. Where a standard 100 W panel fits, it costs much less.
Amazon $119.99$119.99
The Rich Solar MEGA 100 Slim and the Renogy ShadowFlux 120W Rigid are evenly matched, rated 3.7 and 3.7. The Rich Solar MEGA 100 Slim leads on durability. The Renogy ShadowFlux 120W Rigid wins on value. The Renogy ShadowFlux 120W Rigid costs $3 less ($116.99 vs $119.99).
Renogy ShadowFlux 120W Rigid
#6 in Under 150 WFull review
For a van or small RV roof where vents, racks or trees shade part of the panel. With clear sun all day, a standard 100 W panel costs less per watt.
Amazon $116.99$116.99
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 Rich Solar MEGA 100 Slim for durability (IP67, 10-year warranty vs IP67, 5-year warranty).
- Choose the Renogy ShadowFlux 120W Rigid for value ($0.97 per rated watt vs $1.20 per rated watt).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every under 150 W rigid solar panel; a clear win is highlighted. How we rank explains each one.
| Factor weight | Rich Solar MEGA 100 Slim | Renogy ShadowFlux 120W Rigid |
|---|---|---|
| Overall rating | 3.7/5 | 3.7/5 |
| Value 45% | 57 $1.20 per rated watt | 73 $0.97 per rated watt |
| Tested output 15% | 50 not yet independently tested (neutral score used) | 50 not yet independently tested (neutral score used) |
| Durability 25% | 100 IP67, 10-year warranty | 67 IP67, 5-year warranty |
| Efficiency 15% | 34 19.7% module efficiency | 34 19.7% module efficiency (from size and rated power) |
Specifications
| Rich Solar MEGA 100 Slim | Renogy ShadowFlux 120W Rigid | |
|---|---|---|
| Output | ||
| Rated power | 100 W | 120 W |
| Module efficiency | 19.7% | 19.7% (rated power over panel area) |
| Claimed efficiency | 25.1% (maximum cell efficiency; datasheet module efficiency 19.7%) | 25% (cell efficiency; datasheet module efficiency 20.7%) |
| Cells | Monocrystalline (N-type TOPCon, 34 cells) | Monocrystalline (N-type, 16BB, cell-level bypass (ShadowFlux)) |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 23.6 V | 33.7 V |
| Voltage at max power (Vmp) | 19.6 V | 28.9 V |
| Short-circuit current (Isc) | 5.4 A | 4.6 A |
| Current at max power (Imp) | 5.1 A | 4.2 A |
| Voc temperature coefficient | -0.3%/°C | -0.2%/°C |
| Series / parallel | Yes | - |
| Connections | ||
| Output connector | Solar connectors | MC4 |
| Build | ||
| Weight | 12.4 lb (5.6 kg) | 15.9 lb (6.8 kg) |
| Dimensions | 50.0 x 15.7 x 1.2 in | 41.42 x 22.76 x 1.18 in |
| Frame | anodized aluminum alloy | anodized aluminum alloy |
| Glass | 3.2 mm AR-coated tempered | tempered |
| Junction box rating | IP67 | IP67 |
| Warranty | 10 years | 5 years |
| Output warranty | 25-year limited power output warranty | 95% output for 5 years, 90% for 10 years, 80% for 25 years |
| Released | 2025-09 | 2025-08 |