The ACOPOWER 175W 12V Mono is the better rigid solar panel overall, rated 3.4 to 2.9. The ACOPOWER 175W 12V Mono leads on durability. The Newpowa 150W 12V Mono wins on value. The Newpowa 150W 12V Mono costs $42.27 less ($137.72 vs $179.99).
For a van roof where a 175 W panel fits better than a 200 W one, on a 12 V system with a simple controller. Where space allows, a 200 W N-type panel gives more for the money.
Amazon $179.99A middle size for a 12 V system where a 100 W panel is too little and a 200 W panel won’t fit. Buy it from Newpowa’s own store, where it costs less than on Amazon.
Amazon $162.99 Newpowa $137.72Prices 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.
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 | ACOPOWER 175W 12V Mono | Newpowa 150W 12V Mono |
|---|---|---|
| Overall rating | 3.4/5 | 2.9/5 |
| Value 45% | 45 $1.03 per rated watt | 55 $0.92 per rated watt |
| Tested output 15% | 50 not yet independently tested (neutral score used) | 50 not yet independently tested (neutral score used) |
| Durability 25% | 84 IP65, 10-year warranty | 7 no IP rating, 2-year warranty |
| Efficiency 15% | 36 19.8% module efficiency | 40 20% module efficiency (from size and rated power) |
| ACOPOWER 175W 12V Mono | Newpowa 150W 12V Mono | |
|---|---|---|
| Output | ||
| Rated power | 175 W | 150 W |
| Module efficiency | 19.8% | 20% (rated power over panel area) |
| Claimed efficiency | 19.8% (module efficiency) | 22.6% (datasheet "maximum efficiency" (not labeled cell or module)) |
| Cells | Monocrystalline (64 cells) | Monocrystalline (10BB, 182 mm cells, 60 cells) |
| Bifacial | No | No |
| Electrical | ||
| Open-circuit voltage (Voc) | 21.6 V | 20.4 V |
| Voltage at max power (Vmp) | 18.1 V | 17.4 V |
| Short-circuit current (Isc) | 10.3 A | 9.1 A |
| Current at max power (Imp) | 9.7 A | 8.6 A |
| Voc temperature coefficient | -0.3%/°C | -0.4%/°C |
| Connections | ||
| Output connector | Solar connectors (IP68), 14 AWG leads | Pre-attached 3 ft leads with male/female solar connectors |
| Build | ||
| Weight | 22 lb (10 kg) | 18.5 lb (8.4 kg) |
| Dimensions | 49.7 x 27.5 x 1.4 in | 38.6 x 30.1 x 1.4 in |
| Frame | anodized aluminum alloy | anodized aluminum |
| Glass | 3.2 mm tempered | low-iron tempered |
| Junction box rating | IP65 | - |
| Warranty | 10 years | 2 years |
| Output warranty | 25-year power output warranty | 90% output for 10 years, 80% for 25 years |
