Rich Solar MEGA 250
#47 in 150 W and upFull review
A strong single panel for a 12 V RV, van or boat roof where space is tight and the controller is PWM. Buyers with room for two panels can get the same power for less.
Amazon $269.99$269.99
The Rich Solar MEGA 250 is the better rigid solar panel overall, rated 3.6 to 3.0. The Rich Solar MEGA 250 leads on durability and efficiency. The Newpowa 220W 12V Mono wins on value. The Newpowa 220W 12V Mono costs $89.40 less ($180.59 vs $269.99).
Newpowa 220W 12V Mono
#55 in 150 W and upFull review
The most output Newpowa fits in one 12 V panel, for a roof or ground mount with room for a 57 in module. Size the controller and cables for its high current.
Amazon $219.99 Newpowa $180.59$180.59
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 250 for durability (IP68, 10-year warranty vs no IP rating, 2-year warranty) and efficiency (21.4% module efficiency vs 20% module efficiency (from size and rated power)).
- Choose the Newpowa 220W 12V Mono for value ($0.82 per rated watt vs $1.08 per rated watt).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every 150 W and up rigid solar panel; a clear win is highlighted. How we rank explains each one.
| Factor weight | Rich Solar MEGA 250 | Newpowa 220W 12V Mono |
|---|---|---|
| Overall rating | 3.6/5 | 3.0/5 |
| Value 45% | 40 $1.08 per rated watt | 65 $0.82 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 IP68, 10-year warranty | 7 no IP rating, 2-year warranty |
| Efficiency 15% | 68 21.4% module efficiency | 40 20% module efficiency (from size and rated power) |
Specifications
| Rich Solar MEGA 250 | Newpowa 220W 12V Mono | |
|---|---|---|
| Output | ||
| Rated power | 250 W | 220 W |
| Module efficiency | 21.4% | 20% (rated power over panel area) |
| Claimed efficiency | 25.1% (maximum cell efficiency; datasheet module efficiency 21.4%) | 22.4% (datasheet "maximum efficiency" (not labeled cell or module)) |
| Cells | Monocrystalline (N-type TOPCon, 16BB, half-cut, 64 cells) | Monocrystalline (60 cells) |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 22.8 V | 20.5 V |
| Voltage at max power (Vmp) | 18.9 V | 17.5 V |
| Short-circuit current (Isc) | 13.7 A | 13.4 A |
| Current at max power (Imp) | 13.2 A | 12.6 A |
| Voc temperature coefficient | -0.3%/°C | -0.4%/°C |
| Series / parallel | Yes | - |
| Connections | ||
| Output connector | Solar connectors (IP67) | MC4 |
| Build | ||
| Weight | 26.9 lb (12.2 kg) | 26.6 lb (12.1 kg) |
| Dimensions | 60.6 x 29.9 x 1.2 in | 56.7 x 30.1 x 1.4 in |
| Frame | anodized aluminum alloy, 1.3 mm | anodized aluminum |
| Glass | 3.2 mm AR-coated tempered | low-iron tempered |
| Junction box rating | IP68 | - |
| Warranty | 10 years | 2 years |
| Output warranty | 25-year limited power output warranty | 90% output for 10 years, 80% for 25 years |
| Released | 2024-10 | 2022-10 |