Illustration · 108 half-cut cells

Solar panelLa Solar

La Solar LS450BL

Name: La Solar LS450BL
Brand: La Solar

108 half-cut cells. Power classes 390–550 W in the CEC list.

CEC listed · Feb 11, 2022UL 61730Installed in 1 SoCal permit

Power class

Power (STC)450 WCEC nameplate
Efficiency≈20.5%calculated from area
%/°C Pmax−0.352CEC listing test
PTC / STC93.6%PTC 421 W (CEC)

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 15 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
LS390BL	390 W	36.70	13.59	30.53	12.78	≈19.9%	368 W	May 1, 2026
LS395BL	395 W	36.90	13.66	30.70	12.87	≈20.2%	372 W	May 1, 2026
LS400BL	400 W	37.10	13.73	30.87	12.96	≈20.4%	377 W	May 1, 2026
LS405BL	405 W	37.30	13.81	30.87	13.06	≈20.7%	382 W	May 1, 2026
LS410BL	410 W	37.50	13.88	31.20	13.15	≈20.9%	387 W	May 1, 2026
LS430BL	430 W	48.80	11.24	40.30	10.66	≈19.6%	402 W	Feb 11, 2022
LS435BL	435 W	49.00	11.31	40.50	10.74	≈19.9%	407 W	Feb 11, 2022
LS440BL	440 W	49.20	11.39	40.70	10.82	≈20.1%	412 W	Feb 11, 2022
LS445BL	445 W	49.40	11.46	40.80	10.90	≈20.3%	416 W	Feb 11, 2022
LS450BL	450 W	49.60	11.53	41.00	10.98	≈20.5%	421 W	Feb 11, 2022
LS530BL	530 W	49.30	13.60	41.03	12.92	≈20.5%	498 W	Feb 13, 2023
LS535BL	535 W	49.40	13.70	41.29	12.96	≈20.7%	503 W	Feb 13, 2023
LS540BL	540 W	49.50	13.81	41.55	13.00	≈20.9%	508 W	Feb 13, 2023
LS545BL	545 W	49.60	13.92	41.81	13.04	≈21.1%	513 W	Feb 13, 2023
LS550BL	550 W	49.70	14.02	42.07	13.08	≈21.3%	518 W	Feb 13, 2023

≈ efficiency = Pmax ÷ CEC-listed area 1.96 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area2.19 m² (23.6 ft²)CEC-listed area
Cells108 half-cut cells
Back coverBlack backsheet

Heat & cold behaviour

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation

	CEC listing test
Pmax coefficient γ	−0.352 %/°C
Voc coefficient β	−0.292 %/°C
Isc coefficient α	+0.051 %/°C
Operating cell temperature	NOCT 44.1 °C

Vmp coefficient ≈ γ − α (CEC); 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
390 W	294.9 W	29.09 V × 10.14 A	74.4 W	95%
395 W	298.6 W	29.25 V × 10.21 A	75.3 W	95%
400 W	302.4 W	29.41 V × 10.28 A	76.3 W	95%
405 W	304.7 W	29.41 V × 10.36 A	76.9 W	95%
410 W	310.1 W	29.72 V × 10.43 A	78.2 W	95%
430 W	322.5 W	39.96 V × 8.07 A	82.2 W	96%
435 W	326.5 W	40.16 V × 8.13 A	83.3 W	96%
440 W	330.5 W	40.36 V × 8.19 A	84.3 W	96%
445 W	333.8 W	40.45 V × 8.25 A	85.1 W	96%
450 W	337.9 W	40.65 V × 8.31 A	86.2 W	96%
530 W	389.4 W	37.78 V × 10.31 A	97.9 W	92%
535 W	393 W	38.01 V × 10.34 A	98.9 W	92%
540 W	396.7 W	38.25 V × 10.37 A	99.8 W	92%
545 W	400.4 W	38.49 V × 10.4 A	100.7 W	92%
550 W	404.2 W	38.73 V × 10.43 A	101.7 W	92%

Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Inverter compatibility & string sizing

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · NLR PVWatts v8 · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)

CityColdest air, °CHottest cell, °CString inverter

52.9 V

Voc when cold

per panel

32.9 V

Vmp when hot

per panel

Max panels / string

max DC 600 V

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. β is the CEC-measured coefficient; NEC 690.7 calculations use the datasheet value.

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	52.9 / 32.9 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	52.9 / 32.9 V	✓ Within range	0.58
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	52.9 / 32.9 V	✓ Within range	1.38
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	52.9 / 32.9 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

PanelsCity for chartSystem size

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.

Who installs LSxxxBL panels in SoCal

building permits · CSLB License Master

Permits naming this series

Dec 2025

Licensed installers

CSLB license on the permit

Jurisdictions so far

Palmdale (1)

Gp Renewables LLC

Los Angeles · CSLB #1131281

1 installDec 2025Palmdale

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 LS450BL	450 W	≈20.5%	−0.352	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 LS450BL?

Calculated from the panel area (2.19 m²): about 20.5% for the 450 W class. 450 W over 2.19 m² equals about 205 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 = −0.352 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 18.2% 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 = 52.9 V, Vmp at 74 °C cell = 32.9 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 52.9 V vs max input 60 V; Vmp when hot 32.9 V vs MPPT low 28 V; recommended module power 265–570 W. Confirm on the microinverter maker’s compatibility list.

Who installs it in Southern California?

Building permits name this series 1 times (Dec 2025). The most active licensed installers are Gp Renewables LLC.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Qcells — manufacturer datasheet “Q.TRON BLK M-G2+ SERIES 415–440 Wp”.
Hyundai Energy Solutions — datasheet [US] NF(BK)(HiN) Series (N TOPCon Bifacial) 435~445W.
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 — City of Palmdale (Dec 2025). 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).