La Solar datasheet · CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation
Datasheet
CEC listing test
Pmax coefficient γ
−0.37 %/°C
−0.358 %/°C
Voc coefficient β
−0.28 %/°C
−0.374 %/°C
Isc coefficient α
+0.04 %/°C
+0.049 %/°C
Vmp coefficient
≈ −0.41 %/°C
—
Operating cell temperature
—
NOCT 44.1 °C
Vmp coefficient ≈ γ − α (datasheet); used only for the hot-roof voltage estimate.
Away from lab conditions — CEC listing test points
Class
Pmax at NOCT
Vmp × Imp at NOCT
Pmax at 200 W/m²
Low-light efficiency vs STC
430 W
323.4 W
40.1 V × 8.07 A
82.2 W
96%
435 W
327.5 W
40.3 V × 8.13 A
83.2 W
96%
440 W
331.6 W
40.5 V × 8.19 A
84.3 W
96%
445 W
334.8 W
40.6 V × 8.25 A
85.1 W
96%
450 W
338.9 W
40.8 V × 8.31 A
86.2 W
96%
Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).
Electrical & strength ratings
La Solar datasheet
Max system voltage1500 V
Fire rating (UL 61730)Type 1
Packaging: 26 per pallet · 520 per container
Certifications
CEC PV Module List (Oct 7, 2026) · La Solar datasheet
UL 61730IEC 61215IEC 61730IEC 62804Fire rating Type 1 (UL 61730)ISO 14001ISO 45001ISO 9001
UL 61730CEC listing
IEC 61215datasheet
IEC 61730datasheet
IEC 62804datasheet
Fire rating Type 1 (UL 61730)datasheet
ISO 14001factory, datasheet
ISO 45001factory, datasheet
ISO 9001factory, datasheet
Warranty & degradation
La Solar datasheet
Performance warranty25 years
Inverter compatibility & string sizing
La Solar datasheet · Cali-Graf calculation · NLR PVWatts v8 · CEC PV Module List (Oct 7, 2026) · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)
52.8 V
Voc when cold
per panel
32.8 V
Vmp when hot
per panel
11
Max panels / string
max DC 600 V
2
Min panels / string
MPPT from 60 V
Defaults come from NLR TMY weather (coldest hour, hottest modeled cell). Code calculations (NEC 690.7) use the ASHRAE extreme annual minimum, which is usually colder — enter it above.
String inverters most named in SoCal permits
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
Microinverters (one per panel)
Microinverter
Recommended module power
Max DC input
MPPT
Voc cold / Vmp hot
Check
DC/AC
Enphase IQ8X-80-M-US
320–540 W
79.5 V
43–60 V
52.8 / 32.8 V
✗ Not a match: module voltage below MPPT range
1.18
APsystems (Alt Power System) DS3-L
265–570 W
60 V
28–45 V
52.8 / 32.8 V
✓ Within range
0.58
Enphase IQ8M-72-2-US
260–460 W
60 V
30–45 V
52.8 / 32.8 V
✓ Within range
1.38
Enphase IQ8A-72-2-US
295–500 W
60 V
32–45 V
52.8 / 32.8 V
✓ Within range
1.29
Voltage check against the microinverter datasheets — confirm the pairing on the manufacturer’s module compatibility list. Rows appear only when the panel’s power is inside the microinverter’s recommended module power range.
SolarEdge and other optimizer-based systems size strings by the optimizer rules — use the manufacturer’s designer. Reference inverters: most named in SoCal permits since Oct 2024.
Expected production in Southern California
NLR PVWatts v8 · Cali-Graf calculation
City
kWh / kW / yr
kWh / panel / yr
kWh / system / yr
Sun, kWh/m²/day
Los Angeles
1,676
754
12,067
6.08
Palmdale
1,835
826
13,212
6.69
Chula Vista
1,696
763
12,211
6.11
Huntington Beach
1,643
739
11,830
5.89
Riverside
1,696
763
12,211
6.21
Santa Clarita
1,724
776
12,413
6.28
Estimate for comparison, not a quote: shading, roof orientation and local losses change real output. Roof mount, 20° tilt, south, 14% system losses.
Only installer and ZIP level is shown — no homeowner names, street addresses or permit numbers. Counts grow as more permit portals are loaded.
Compare with similar 450 W panels
CEC PV Module List (Oct 7, 2026) · datasheets · Kiwa PVEL Scorecard · building permits
Panel
Pmax
Efficiency
γ Pmax (CEC)
Voc, V
Isc, A
PVEL (product / brand)
SoCal permits (series)
La Solar LS450HC
450 W
≥20.6%
−0.358
49.6
11.53
—
1
Qcells Q.TRON BLK M-G2+ 445
445 W
≈22.8%
−0.276
40.16
13.98
brand 11× (2016–2026)
40
Hyundai Energy Solutions HiN-T450NF(BK)
450 W
≈23.2%
−0.298
39.2
14.53
brand 5× (2017–2025)
37
REC Group REC450AA Pure-RX
450 W
≈22.3%
−0.248
65.1
8.81
brand 9× (2016–2025)
33
Same fields from the same sources for every row; ≈ efficiency is calculated from the listed area. Comparable series: other brands, same product group, power range covering this class.
Questions & answers
How efficient is the La Solar LS450HC?
The La Solar datasheet guarantees at least 20.6% module efficiency for the 450 W class. 450 W over 2.21 m² equals about 204 W per square meter.
How much energy does one panel produce in Los Angeles or Palmdale?
PVWatts v8 with typical-year weather gives about 754 kWh per year per 450 W panel in Los Angeles and about 826 kWh in Palmdale (20° roof, facing south, 14% system losses).
How much power does it lose on a hot roof?
With γ = −0.37 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 19.2% below the STC rating.
How many panels fit on one string?
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 = 52.8 V, Vmp at 74 °C cell = 32.8 V). Final design must follow the inverter manual and NEC 690.7.
Does it work with APsystems (Alt Power System) DS3-L microinverters?
Voltage check against the APsystems (Alt Power System) datasheet: Voc when cold 52.8 V vs max input 60 V; Vmp when hot 32.8 V vs MPPT low 28 V; recommended module power 265–570 W. Confirm on the microinverter maker’s compatibility list.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists.
NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
Building permits — LADBS, City of Los Angeles (Jul 2021). Equipment matched from permit descriptions by model number.
Contractors State License Board — License Master (contractor names and license status), as of Oct 5, 2026.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).
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