The ACOPOWER 175W 12V Mono is the better rigid solar panel overall, rated 3.4 to 3.3. The ACOPOWER 175W 12V Mono leads on durability. The ACOPOWER 250W Bifacial N-Type wins on efficiency. The ACOPOWER 175W 12V Mono costs $89.81 less ($179.99 vs $269.80).
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 $179.99For an RV, cabin or ground mount with room for a 61 in panel and an MPPT controller. The bifacial back helps most when the panel is tilted above a light surface.
Amazon $269.80Prices 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 | ACOPOWER 250W Bifacial N-Type |
|---|---|---|
| Overall rating | 3.4/5 | 3.3/5 |
| Value 45% | 45 $1.03 per rated watt | 40 $1.08 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 | 67 IP67, 5-year warranty |
| Efficiency 15% | 36 19.8% module efficiency | 62 21.1% module efficiency (from size and rated power) |
| ACOPOWER 175W 12V Mono | ACOPOWER 250W Bifacial N-Type | |
|---|---|---|
| Output | ||
| Rated power | 175 W | 250 W |
| Module efficiency | 19.8% | 21.1% (rated power over panel area) |
| Claimed efficiency | 19.8% (module efficiency) | 25.4% (cell efficiency (the datasheet headline says maximum cell efficiency; its table labels it module efficiency)) |
| Cells | Monocrystalline (64 cells) | Monocrystalline (N-type TOPCon, 16BB, 128 cells) |
| Bifacial | No | Yes |
| Electrical | ||
| Open-circuit voltage (Voc) | 21.6 V | 44.8 V |
| Voltage at max power (Vmp) | 18.1 V | 38.4 V |
| Short-circuit current (Isc) | 10.3 A | 7 A |
| Current at max power (Imp) | 9.7 A | 6.7 A |
| Voc temperature coefficient | -0.3%/°C | -0.3%/°C |
| Series / parallel | - | Yes |
| Connections | ||
| Output connector | Solar connectors (IP68), 14 AWG leads | MC4, 12 AWG leads |
| Build | ||
| Weight | 22 lb (10 kg) | 26.3 lb (11.9 kg) |
| Dimensions | 49.7 x 27.5 x 1.4 in | 61.0 x 30.1 x 1.4 in |
| Frame | anodized aluminum alloy | black anodized aluminum alloy |
| Glass | 3.2 mm tempered | 3.2 mm AR-coated tempered |
| Junction box rating | IP65 | IP67 |
| Warranty | 10 years | 5 years |
| Output warranty | 25-year power output warranty | 25-year power output warranty |
