Illustration · 144 half-cut cells

Solar panelMission Solar Energy

Mission Solar Energy TXS6-440144BB

Name: Mission Solar Energy TXS6-440144BB
Brand: Mission Solar Energy

144 half-cut cells. Power classes 420–450 W in the CEC list.

CEC listed · Jun 11, 2021UL 61730Seen in 1 SoCal permit

Power class

Power (STC)440 WCEC nameplate
Efficiency≈20.5%calculated from area
%/°C Pmax−0.327CEC listing test
PTC / STC93.2%PTC 410 W (CEC)

Power classes

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

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
TXS6-420144BB	420 W	49.10	11.04	40.20	10.45	≈19.5%	391 W	Jun 11, 2021
TXS6-425144BB	425 W	49.30	11.11	40.40	10.52	≈19.8%	396 W	Jun 11, 2021
TXS6-430144BB	430 W	49.50	11.19	40.60	10.60	≈20.0%	400 W	Jun 11, 2021
TXS6-435144BB	435 W	49.70	11.26	40.80	10.67	≈20.2%	405 W	Jun 11, 2021
TXS6-440144BB	440 W	49.90	11.33	41.00	10.74	≈20.5%	410 W	Jun 11, 2021
TXS6-445144BB	445 W	50.10	11.40	41.20	10.81	≈20.7%	415 W	Jun 11, 2021
TXS6-450144BB	450 W	50.30	11.46	41.40	10.87	≈20.9%	420 W	Jun 11, 2021

≈ efficiency = Pmax ÷ CEC-listed area 2.15 m².

Build & dimensions

CEC PV Module List (Oct 7, 2026)

Module area2.15 m² (23.1 ft²)CEC-listed area
Cells144 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	−0.327 %/°C
Voc coefficient β	−0.262 %/°C
Isc coefficient α	+0.060 %/°C
Operating cell temperature	NOCT 46.8 °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
420 W	308.9 W	37.56 V × 8.22 A	77.2 W	92%
425 W	312.5 W	37.75 V × 8.28 A	78.1 W	92%
430 W	316.5 W	37.93 V × 8.34 A	79.1 W	92%
435 W	320.1 W	38.12 V × 8.4 A	80 W	92%
440 W	323.8 W	38.31 V × 8.45 A	80.9 W	92%
445 W	327.5 W	38.49 V × 8.51 A	81.9 W	92%
450 W	330.9 W	38.68 V × 8.56 A	82.7 W	92%

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

Independent reliability testing

Kiwa PVEL Scorecard · RETC PV Module Index

PVEL Scorecards

Mission Solar Energy named Top Performer, 2024–2025

RETC PV Module Index

Mission Solar Energy recognized 2023–2026

This exact series is not listed in published PVEL Top Performer tables. Results below are for the manufacturer.

RETC PV Module Index — Mission Solar Energy

Year	Recognition
2023	High Achievement in Performance (Module efficiency)
2024	Test Category High Achiever
2025	Performance High Achiever
2026	Performance discipline high achiever (Iam, Lid); Quality discipline high achiever (BOM verification); Test Category High Achiever

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

33.2 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 IQ8PLUS-72-2-US	235–440 W	60 V	29–45 V	52.9 / 33.2 V	✓ Within range	1.52
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	52.9 / 33.2 V	✗ Not a match: module voltage below MPPT range	1.16
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	52.9 / 33.2 V	✓ Within range	0.56
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	52.9 / 33.2 V	✓ Within range	1.35
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	52.9 / 33.2 V	✓ Within range	1.26

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	737	11,799	6.08
Palmdale	1,835	807	12,918	6.69
Chula Vista	1,696	746	11,940	6.11
Huntington Beach	1,643	723	11,567	5.89
Riverside	1,696	746	11,940	6.21
Santa Clarita	1,724	759	12,137	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.

Compare with similar 440 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	Warranty	PVEL (product / brand)	SoCal permits (series)
Mission Solar Energy TXS6-440144BB	440 W	≈20.5%	−0.327	49.9	11.33	—	brand 2×	1
Qcells Q.TRON BLK M-G2+ 440	440 W	≥22.5%	−0.276	39.88	13.9	25 / 25 yr	brand 11× (2016–2026)	40
Silfab Solar SIL-440QD	440 W	≈22.6%	−0.294	38.97	14.25	25 / 30 yr	brand 7× (2017–2025)	39
Hyundai Energy Solutions HiN-T440NF(BK)	440 W	≈22.7%	−0.298	38.8	14.39	25 / 30 yr	brand 5× (2017–2025)	37

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.

About Mission Solar Energy

CEC PV Module List (Oct 7, 2026) · Kiwa PVEL Scorecard · RETC PV Module Index · building permits

ManufacturerMission Solar Energy
Listed in CEC asMission Solar Energy LLC
Websitemissionsolar.com
PVEL Top Performer (manufacturer)2 Scorecards (2024–2025)
RETC PV Module Index2023, 2024, 2025, 2026
Current panel series in CEC list38

Other series by SoCal permits

MSExxxSX9R · 4MSExxxSX5R · 2MSExxxHT0B · 1MSExxxSX6Z · 1TXS6-xxx120BB · 1MSExxxTS60 · 1

Questions & answers

How efficient is the Mission Solar Energy TXS6-440144BB?

Calculated from the panel area (2.15 m²): about 20.5% for the 440 W class. 440 W over 2.15 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 737 kWh per year per 440 W panel in Los Angeles and about 807 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.327 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 16.9% 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 = 33.2 V). Final design must follow the inverter manual and NEC 690.7.

Does it work with Enphase IQ8PLUS-72-2-US microinverters?

Voltage check against the Enphase datasheet: Voc when cold 52.9 V vs max input 60 V; Vmp when hot 33.2 V vs MPPT low 29 V; recommended module power 235–440 W. Confirm on the microinverter maker’s compatibility list.

Has this panel been reliability-tested?

This exact series is not in published PVEL Top Performer tables; Mission Solar Energy was named a Top Performer in 2 Scorecards (2024–2025).

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”.
Silfab Solar — datasheet NTC SIL-420 QD CELL TECHNOLOGY.
Hyundai Energy Solutions — datasheet [US] NF(BK)(HiN) Series (N TOPCon Bifacial) 435~445W.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists 2024–2025.
RETC — PV Module Index reports 2023–2026.
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 — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Jun 2024). Equipment matched from permit descriptions by model number.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).