Panels
Efficiency, warranties and real-world value of solar panels.
Compare solar panel specs
| Maxeon 6 SPR-MAX6-440 Series 425–440 W. Datasheet published March 2024; check current US availability. | Monocrystalline IBC (Gen 6), 66 cells | 440 | 22.8 | -0.29 | 40 (Maxeon Partner install + registration) / 25 standard | 40 / 25 | Not stated (yr 1 ≥98.0%, then max 0.25%/yr) |
|---|---|---|---|---|---|---|---|
| Qcells Q.TRON BLK M-G2+ 440 Series 420–440 W. Efficiency is the datasheet minimum (430 W bin: ≥22.0%). | N-type (Q.ANTUM NEO), 108 half-cells | 440 | ≥22.5 (min.) | -0.29 | 25 | 25 | ≥90.58% (yr 1 ≥98.5%, then max 0.33%/yr) |
| REC Alpha Pure-RX 470 US series 450–470 W. REC ProTrust also adds up to 25 yr labor (systems <25 kW). | Heterojunction, 88 half-cut bifacial cells | 470 | 22.6 | -0.24 | 20 (25 with REC ProTrust via certified installer) | 25 | 92% (yr 1 ≥98%, then max 0.25%/yr) |
| Silfab Prime SIL-440 QD Datasheet dated Aug 2026. | N-type, 108 half-cells | 440 | 22.6 | -0.29 | 12 (extendable to 25 with registration/conditions) | 30 | ≥90.8% (≥89.3% at yr 30) |