The Qcells Q.TRON BLK M-G2+ 430 is the better rigid solar panel overall, rated 4.5 to 4.0. The Qcells Q.TRON BLK M-G2+ 430 leads on efficiency and value. The Qcells Q.TRON BLK M-G2+ 430 costs $54.68 less ($245.29 vs $299.97).
A safe all-black pick for a home rooftop array where a long warranty from a large, US-assembling maker matters more than the lowest price per watt.
Solar Cellz USA $245.29 A1 Solar Store $245.96A good-value pair for a 24 V RV, van or cabin system with an MPPT controller, or for a power station wired in parallel. Owners of 12 V PWM setups should pick a lower-voltage panel.
Amazon $299.97Prices 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 | Qcells Q.TRON BLK M-G2+ 430 | Callsun 420W (2 x 210W) Bifacial 2-Pack |
|---|---|---|
| Overall rating | 4.5/5 | 4.0/5 |
| Value 45% | 89 $0.57 per rated watt | 75 $0.71 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, 25-year warranty | 100 IP68, 10-year warranty |
| Efficiency 15% | 80 22% module efficiency | 38 19.9% module efficiency (from size and rated power) |
| Qcells Q.TRON BLK M-G2+ 430 | Callsun 420W (2 x 210W) Bifacial 2-Pack | |
|---|---|---|
| Output | ||
| Rated power | 430 W | 420 W |
| Module efficiency | 22% | 19.9% (rated power over panel area) |
| Claimed efficiency | 22.5% (maximum module efficiency of the series (440 W version); the 430 W version is at least 22.0%) | 25.6% (cell efficiency; no module efficiency published) |
| Cells | Monocrystalline (N-type TOPCon (Q.ANTUM NEO), 108 half cells) | Monocrystalline (N-type, 16BB, quarter-cut cells, wired as two parallel halves for shade tolerance) |
| Bifacial | No | Yes |
| Electrical | ||
| Open-circuit voltage (Voc) | 39.3 V | 40.3 V |
| Voltage at max power (Vmp) | 32.9 V | 34.2 V |
| Short-circuit current (Isc) | 13.7 A | 6.5 A |
| Current at max power (Imp) | 13.1 A | 6.1 A |
| Voc temperature coefficient | -0.2%/°C | -0.2%/°C |
| Series / parallel | Yes | Yes |
| Connections | ||
| Output connector | Stäubli MC4 (IP68) | Solar connectors |
| Build | ||
| Weight | 46.7 lb (21.2 kg) | - |
| Dimensions | 67.8 x 44.6 x 1.18 in | 54.2 x 30.2 x 1.4 in (each panel) |
| Frame | black anodized aluminum | anodized aluminum alloy |
| Glass | 3.2 mm thermally pre-stressed, anti-reflection | 3.2 mm tempered |
| Junction box rating | IP68 | IP68 |
| Warranty | 25 years | 10 years |
| Output warranty | 25 years: at least 98.5% in year 1, then no more than 0.33% loss a year (95.53% at 10 years, 90.58% at 25 years) | 84.5% output after 25 years |
| Released | - | 2026-08 |
