California
LADWP solar bill explained120 half-cut cells. Power classes 330–360 W in the CEC list.
| Model | Pmax | Voc, V | Isc, A | Vmp, V | Imp, A | Efficiency | PTC | CEC listed |
|---|---|---|---|---|---|---|---|---|
| Q.PEAK DUO BLK-G8+ 330 | 330 W | 39.96 | 10.41 | 33.61 | 10.01 | ≈18.4% | 306 W | Feb 11, 2021 |
| Q.PEAK DUO BLK-G8+ 335 | 335 W | 39.96 | 10.47 | 33.61 | 10.01 | ≈18.7% | 310 W | Feb 11, 2021 |
| Q.PEAK DUO BLK-G8+ 340 | 340 W | 40.20 | 10.63 | 33.61 | 10.12 | ≈19.0% | 315 W | Feb 11, 2021 |
| Q.PEAK DUO BLK-G8+ 345 | 345 W | 40.45 | 10.68 | 33.92 | 10.17 | ≈19.3% | 320 W | Feb 11, 2021 |
| Q.PEAK DUO BLK-G8+ 350 | 350 W | 40.70 | 10.74 | 34.24 | 10.22 | ≈19.5% | 325 W | Feb 11, 2021 |
| Q.PEAK DUO BLK-G8+ 355 | 355 W | 40.95 | 10.79 | 34.55 | 10.28 | ≈19.8% | 330 W | Feb 11, 2021 |
| Q.PEAK DUO BLK-G8+ 360 | 360 W | 41.19 | 10.84 | 34.85 | 10.33 | ≈20.1% | 334 W | Feb 11, 2021 |
| Datasheet | CEC listing test | |
|---|---|---|
| Pmax coefficient γ | −0.35 %/°C | −0.345 %/°C |
| Voc coefficient β | −0.27 %/°C | −0.272 %/°C |
| Isc coefficient α | +0.04 %/°C | +0.039 %/°C |
| Vmp coefficient | ≈ −0.39 %/°C | — |
| Operating cell temperature | NMOT 43 ± 3 °C | NOCT 46.7 °C |
| Class | Pmax at NOCT | Vmp × Imp at NOCT | Pmax at 200 W/m² | Low-light efficiency vs STC |
|---|---|---|---|---|
| 330 W | 239 W | 30.96 V × 7.72 A | 61.2 W | 93% |
| 335 W | 239 W | 30.96 V × 7.72 A | 61.2 W | 91% |
| 340 W | 241.6 W | 30.96 V × 7.8 A | 61.8 W | 91% |
| 345 W | 245.1 W | 31.25 V × 7.84 A | 62.7 W | 91% |
| 350 W | 248.6 W | 31.54 V × 7.88 A | 63.6 W | 91% |
| 355 W | 252.3 W | 31.83 V × 7.93 A | 64.6 W | 91% |
| 360 W | 255.7 W | 32.1 V × 7.97 A | 65.5 W | 91% |
| Year | Recognition |
|---|---|
| 2023 | Overall Highest Achiever; High Achievement in Performance (Module efficiency, Pan file performance); High Achievement in Reliability (Damp heat test, Pid resistance, Thermal cycle test) |
| 2024 | High Achievement in Performance |
| 2025 | Performance High Achiever |
| 2026 | Overall Highest Achiever; High achievement in performance; High achievement in reliability; Performance discipline high achiever (Conversion efficiency, Iam, Letid, Lid, PTC-to-STC, Temperature coefficient); Quality discipline high achiever (BOM verification); Reliability discipline high achiever (Sdml, Tc, Uvid, Budt, Damp heat, Hdt, Pid) |
| Inverter | Max DC input | MPPT | Window source | Panels per string |
|---|---|---|---|---|
| Tesla 1538000-xx-y | 600 V | 60–480 V | datasheet | 3–14 |
| Solis (Ginlong) S6-EH1P10K-H-US | 600 V | 80–520 V | datasheet | 3–14 |
| Solis (Ginlong) Solis-1P7.6K-4G-US | 600 V | 100–500 V | datasheet | 4–14 |
| Qcells Q.VOLT H7.6SX | 498 V | 234–498 V | CEC test window | 9–11 |
| Microinverter | Recommended module power | Max DC input | MPPT | Voc cold / Vmp hot | Check | DC/AC |
|---|---|---|---|---|---|---|
| Enphase IQ8PLUS-72-2-US | 235–440 W | 60 V | 29–45 V | 42.7 / 27.2 V | ⚠ Works; below MPPT at peak heat | 1.17 |
| Enphase IQ8X-80-M-US | 320–540 W | 79.5 V | 43–60 V | 42.7 / 27.2 V | ✗ Not a match: module voltage below MPPT range | 0.89 |
| APsystems (Alt Power System) DS3-L | 265–570 W | 60 V | 28–45 V | 42.7 / 27.2 V | ⚠ Works; below MPPT at peak heat | 0.44 |
| Enphase IQ8M-72-2-US | 260–460 W | 60 V | 30–45 V | 42.7 / 27.2 V | ⚠ Works; below MPPT at peak heat | 1.05 |
| Enphase IQ8A-72-2-US | 295–500 W | 60 V | 32–45 V | 42.7 / 27.2 V | ⚠ Works; below MPPT at peak heat | 0.97 |
| City | kWh / kW / yr | kWh / panel / yr | kWh / system / yr | Sun, kWh/m²/day |
|---|---|---|---|---|
| Los Angeles | 1,676 | 570 | 11,967 | 6.08 |
| Palmdale | 1,835 | 624 | 13,102 | 6.69 |
| Chula Vista | 1,696 | 577 | 12,109 | 6.11 |
| Huntington Beach | 1,643 | 559 | 11,731 | 5.89 |
| Riverside | 1,696 | 577 | 12,109 | 6.21 |
| Santa Clarita | 1,724 | 586 | 12,309 | 6.28 |
median 7.5 kW (n = 5)
| Panel | Pmax | Efficiency | γ Pmax (CEC) | Voc, V | Isc, A | PVEL (product / brand) | SoCal permits (series) |
|---|---|---|---|---|---|---|---|
| Qcells Q.PEAK DUO BLK-G8+ 340 | 340 W | ≈19% | −0.345 | 40.2 | 10.63 | brand 11× | 5 |
| LONGi LR4-60HPB-340M | 340 W | ≈18.8% | −0.337 | 40.1 | 10.84 | product 2021, 2022 | 193 |
| JinkoSolar JKM340M-60HBL | 340 W | ≈20.1% | −0.406 | 41 | 10.82 | brand 12× (2014–2026) | 45 |
| REC Group REC340AA | 340 W | ≈20.2% | −0.279 | 43.1 | 10.09 | brand 9× (2016–2025) | 30 |
Calculated from the panel area (1.79 m²): about 19% for the 340 W class. 340 W over 1.79 m² equals about 190 W per square meter.
PVWatts v8 with typical-year weather gives about 570 kWh per year per 340 W panel in Los Angeles and about 624 kWh in Palmdale (20° roof, facing south, 14% system losses).
With γ = −0.35 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 18.1% below the STC rating.
With the Tesla 1538000-xx-y (max DC 600 V, MPPT from 60 V, datasheet) in Los Angeles the calculator gives 3–14 panels per string (Voc at 2 °C = 42.7 V, Vmp at 74 °C cell = 27.2 V). Final design must follow the inverter manual and NEC 690.7.
25 years on the product and 25 years linear on performance: at least 98% of rated power in year 1, then no more than 0.54% per year — at least 85% after 25 years (manufacturer datasheet).
68.5 × 40.6 × 1.26 in (1,740 × 1,030 × 32 mm), 43.9 lb (19.9 kg).
This exact series is not in published PVEL Top Performer tables; Qcells was named a Top Performer in 11 Scorecards (2016–2026). RETC named Qcells Overall Highest Achiever in 2023, 2026.
UL 61730 fire rating Type 2 per datasheet.