California
LADWP solar bill explained72 cells (6 × 12). Power classes 360–395 W in the CEC list; datasheet covers 370–390 W.
| Model | Pmax | Voc, V | Isc, A | Vmp, V | Imp, A | Efficiency | PTC | CEC listed |
|---|---|---|---|---|---|---|---|---|
| VSUN360-72M-BB | 360 W | 47.70 | 9.67 | 39.20 | 9.19 | ≈18.1% | 335 W | Nov 1, 2019 |
| VSUN365-72M-BB | 365 W | 47.90 | 9.75 | 39.40 | 9.27 | ≈18.4% | 340 W | Nov 1, 2019 |
| VSUN370-72M-BB | 370 W | 48.10 | 9.83 | 39.60 | 9.35 | ≥18.6% | 344 W | Nov 1, 2019 |
| VSUN375-72M-BB | 375 W | 48.30 | 9.92 | 39.80 | 9.43 | ≥18.9% | 349 W | Nov 1, 2019 |
| VSUN380-72M-BB | 380 W | 48.50 | 10.01 | 40.00 | 9.51 | ≥19.1% | 350 W | Nov 1, 2019 |
| VSUN385-72M-BB | 385 W | 48.70 | 10.09 | 40.20 | 9.58 | ≥19.4% | 354 W | Apr 13, 2020 |
| VSUN390-72M-BB | 390 W | 48.90 | 10.18 | 40.40 | 9.66 | ≥19.6% | 359 W | Apr 13, 2020 |
| VSUN395-72M-BB | 395 W | 49.10 | 10.27 | 40.60 | 9.74 | ≈19.9% | 364 W | Apr 13, 2020 |
| Datasheet | CEC listing test | |
|---|---|---|
| Pmax coefficient γ | — | −0.363 %/°C |
| Voc coefficient β | — | −0.270 %/°C |
| Isc coefficient α | — | +0.039 %/°C |
| Vmp coefficient | ≈ −0.40 %/°C | — |
| Operating cell temperature | NMOT 45 °C | NOCT 44.5 °C |
| Class | Pmax, W | Voc, V | Isc, A | Vmp, V | Imp, A |
|---|---|---|---|---|---|
| 370 W | 273.6 | 44.50 | 7.94 | 36.60 | 7.47 |
| 375 W | 277.3 | 44.60 | 8.02 | 36.80 | 7.54 |
| 380 W | 281.0 | 44.80 | 8.09 | 36.90 | 7.61 |
| 385 W | 284.5 | 45.00 | 8.15 | 37.10 | 7.67 |
| 390 W | 288.3 | 45.20 | 8.23 | 37.20 | 7.74 |
| Class | Pmax at NOCT | Vmp × Imp at NOCT | Pmax at 200 W/m² | Low-light efficiency vs STC |
|---|---|---|---|---|
| 360 W | 269.9 W | 37.08 V × 7.28 A | 69.9 W | 97% |
| 365 W | 273.6 W | 37.27 V × 7.34 A | 70.9 W | 97% |
| 370 W | 277.4 W | 37.46 V × 7.4 A | 71.8 W | 97% |
| 375 W | 281.1 W | 37.65 V × 7.47 A | 72.8 W | 97% |
| 380 W | 281.8 W | 36.93 V × 7.63 A | 73.9 W | 97% |
| 385 W | 285.3 W | 37.12 V × 7.69 A | 74.9 W | 97% |
| 390 W | 289.1 W | 37.3 V × 7.75 A | 75.9 W | 97% |
| 395 W | 292.9 W | 37.49 V × 7.81 A | 76.9 W | 97% |
| Year | Recognition |
|---|---|
| 2024 | Test Category High Achiever |
| 2025 | Overall Highest Achiever |
| 2026 | Overall Highest Achiever; High achievement in performance; High achievement in reliability; Performance discipline high achiever (Lid, PAN file, Temperature coefficient, Iam, Letid); Quality discipline high achiever (BOM verification); Reliability discipline high achiever (Damp heat, Pid, Sdml, Tc, Uvid) |
| Inverter | Max DC input | MPPT | Window source | Panels per string |
|---|---|---|---|---|
| Tesla 1538000-xx-y | 600 V | 60–480 V | datasheet | 2–11 |
| Solis (Ginlong) S6-EH1P10K-H-US | 600 V | 80–520 V | datasheet | 3–11 |
| Solis (Ginlong) Solis-1P7.6K-4G-US | 600 V | 100–500 V | datasheet | 4–11 |
| Qcells Q.VOLT H7.6SX | 498 V | 234–498 V | CEC test window | 8–9 |
| 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 | 51.3 / 32 V | ✓ Within range | 1.29 |
| Enphase IQ8X-80-M-US | 320–540 W | 79.5 V | 43–60 V | 51.3 / 32 V | ✗ Not a match: module voltage below MPPT range | 0.99 |
| APsystems (Alt Power System) DS3-L | 265–570 W | 60 V | 28–45 V | 51.3 / 32 V | ✓ Within range | 0.48 |
| Enphase IQ8M-72-2-US | 260–460 W | 60 V | 30–45 V | 51.3 / 32 V | ✓ Within range | 1.15 |
| Enphase IQ8A-72-2-US | 295–500 W | 60 V | 32–45 V | 51.3 / 32 V | ⚠ Works; below MPPT at peak heat | 1.07 |
| City | kWh / kW / yr | kWh / panel / yr | kWh / system / yr | Sun, kWh/m²/day |
|---|---|---|---|---|
| Los Angeles | 1,676 | 628 | 11,942 | 6.08 |
| Palmdale | 1,835 | 688 | 13,074 | 6.69 |
| Chula Vista | 1,696 | 636 | 12,084 | 6.11 |
| Huntington Beach | 1,643 | 616 | 11,706 | 5.89 |
| Riverside | 1,696 | 636 | 12,084 | 6.21 |
| Santa Clarita | 1,724 | 646 | 12,284 | 6.28 |
| Panel | Pmax | Efficiency | γ Pmax (CEC) | Voc, V | Isc, A | PVEL (product / brand) | SoCal permits (series) |
|---|---|---|---|---|---|---|---|
| VSUN (Vietnam Sunergy) VSUN375-72M-BB | 375 W | ≥18.9% | −0.363 | 48.3 | 9.92 | brand 6× | — |
| Qcells Q.PEAK DUO BLK ML-G10+ 380 | 380 W | ≈19.4% | −0.362 | 45.16 | 11.01 | product 2022, 2023 | 221 |
| LONGi LR4-60HPB-370M | 370 W | ≈20.9% | −0.339 | 41.2 | 11.5 | product 2021, 2022 | 193 |
| REC Group REC380AA Pure | 380 W | ≈21.2% | −0.256 | 48.4 | 10.17 | brand 9× (2016–2025) | 66 |
The VSUN (Vietnam Sunergy) datasheet guarantees at least 18.9% module efficiency for the 375 W class (up to 19.6% for 390 W). 375 W over 1.99 m² equals about 189 W per square meter.
PVWatts v8 with typical-year weather gives about 628 kWh per year per 375 W panel in Los Angeles and about 688 kWh in Palmdale (20° roof, facing south, 14% system losses).
With γ = −0.363 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 18.8% 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 2–11 panels per string (Voc at 2 °C = 51.3 V, Vmp at 74 °C cell = 32 V). Final design must follow the inverter manual and NEC 690.7.
Voltage check against the Enphase datasheet: Voc when cold 51.3 V vs max input 60 V; Vmp when hot 32 V vs MPPT low 29 V; recommended module power 235–440 W. Confirm on the microinverter maker’s compatibility list.
12 years on the product and 25 years linear on performance (manufacturer datasheet).
78 × 39.4 × 1.57 in (1,982 × 1,002 × 40 mm), 49.4 lb (22.4 kg).
This exact series is not in published PVEL Top Performer tables; VSUN (Vietnam Sunergy) was named a Top Performer in 6 Scorecards (2021–2026). RETC named VSUN (Vietnam Sunergy) Overall Highest Achiever in 2025, 2026.