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NuWatt designs, installs, and manages solar, battery, heat pump, and EV charger systems across 9 states. One company, one warranty, one point of contact.
Get a Free QuoteWhich is better for your home? We install both. Here's our honest, spec-by-spec comparison based on real installation experience.
The REC Alpha Pure-RX 470W wins this head-to-head comparison, taking 3 out of 5 categories. It's the stronger choice for most homeowners, especially those who prioritize maximum energy per square foot. That said, the Q CELLS Q.PEAK DUO BLK ML-G10+ 415W is still a solid product and may be the better pick if you specifically need best overall value for residential installs.
Q CELLS · Q.PEAK DUO BLK ML-G10+ 415
REC · Alpha Pure-RX 470
| Spec | Q CELLS | REC |
|---|---|---|
| Wattage | 415W | 470W |
| Efficiency | 21.1% | 22.6% |
| Temp Coefficient | -0.34%/°C | -0.26%/°C |
| Degradation Rate | 0.54%/yr (86% at year 25) | 0.25%/yr (92% at year 25) |
| Cell Type | Monocrystalline PERC, half-cut (Q.ANTUM DUO Z) | Heterojunction (HJT), gapless |
| Dimensions | 41.1 x 74.0 x 1.3 in (1045 x 1879 mm) | 42.5 x 74.3 x 1.2 in (1080 x 1890 mm) |
| Weight | 46.3 lbs (21 kg) | 46.3 lbs (21 kg) |
| Origin | South Korea / USA (Dalton, GA) | Norway / Singapore |
| Frame | Black anodized aluminum | Black anodized aluminum |
We evaluate each product across the metrics that matter most to homeowners.
Both offer 25-year warranties.
Q CELLS Q.PEAK DUO BLK ML-G10+ 415W is more affordable at $1.00-1.20/W (panel only) vs $1.30-1.50/W (panel only).
Our crew rates the REC Alpha Pure-RX 470W higher at 9.5/10 vs 9/10.
REC Alpha Pure-RX 470W is more efficient at 22.6% vs 21.1%.
REC Alpha Pure-RX 470W degrades more slowly at 0.25%/yr (92% at year 25) vs 0.54%/yr (86% at year 25).
This is our bread-and-butter panel. The standard size makes racking straightforward and we rarely need custom configurations. Q CELLS has the best domestic supply chain — we almost never face backorder delays. Crew installs average 15-20 panels per day with this model. Rated for 5400 Pa snow load and 4000 Pa wind load — ideal for New England.
REC Alpha Pure-RX is our go-to premium panel. The 470W output means fewer panels for the same system size, which reduces racking hardware and labor. HJT cells have near-zero LID (light-induced degradation), so these panels produce at full rated power from day one. We recommend REC for space-constrained roofs where every watt per square foot counts.
The REC Alpha Pure-RX 470W wins this head-to-head comparison, taking 3 out of 5 categories. It's the stronger choice for most homeowners, especially those who prioritize maximum energy per square foot. That said, the Q CELLS Q.PEAK DUO BLK ML-G10+ 415W is still a solid product and may be the better pick if you specifically need best overall value for residential installs.
Our energy advisors can help you decide between the Q CELLS Q.PEAK DUO BLK ML-G10+ 415W and REC Alpha Pure-RX 470W based on your specific home, budget, and energy goals.
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