44.6″ · 1,134 mm wide · 1.18″ (30 mm) frame · 47.4 lb (21.5 kg)

Solar panelAXITEC

AXITEC AC-400MBT/108V

Name: AXITEC AC-400MBT/108V
Brand: AXITEC

108 half-cut cells, bifacial, composite film, cell gaps black. Power classes 390–410 W in the CEC list.

CEC listed · Jul 21, 2023UL 61730Bifacial · 70 ± 10%25-yr product + 25-yr performance warranty

Power class

Power (STC)400 WCEC nameplate
Efficiency≥20.5%datasheet minimum
%/°C Pmax−0.35CEC test: −0.320
Performance warranty25 yrdatasheet

Power classes

CEC PV Module List (Oct 7, 2026) · AXITEC datasheet · 5 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
AC-390MBT/108V	390 W	36.90	13.61	30.60	12.73	≥20.0%	364 W	Jul 21, 2023
AC-395MBT/108V	395 W	37.00	13.70	30.80	12.81	≥20.2%	368 W	Jul 21, 2023
AC-400MBT/108V	400 W	37.10	13.79	31.00	12.90	≥20.5%	373 W	Jul 21, 2023
AC-405MBT/108V	405 W	37.20	13.87	31.20	12.98	≥20.7%	378 W	Jul 21, 2023
AC-410MBT/108V	410 W	37.30	13.95	31.50	13.04	≥21.0%	383 W	Jul 21, 2023

Build & dimensions

AXITEC datasheet · Cali-Graf calculation

Dimensions67.8 × 44.6 × 1.18 in1,722 × 1,134 × 30 mm
Module area1.95 m² (21 ft²)length × width
Weight47.4 lb (21.5 kg)
Cells108 half-cut cells
Back coverComposite film, cell gaps black
Frame1.18 inch (30 mm) black aluminium frame

Heat & cold behaviour

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

	Datasheet	CEC listing test
Pmax coefficient γ	−0.35 %/°C	−0.320 %/°C
Voc coefficient β	−0.28 %/°C	−0.248 %/°C
Isc coefficient α	+0.04 %/°C	+0.036 %/°C
Vmp coefficient	≈ −0.40 %/°C	—
Operating cell temperature	NMOT 45 °C	NOCT 46.9 °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
390 W	295.9 W	28.4 V × 10.42 A	77.3 W	99%
395 W	300 W	28.6 V × 10.49 A	78.1 W	99%
400 W	303.1 W	28.7 V × 10.56 A	79.1 W	99%
405 W	307.2 W	28.9 V × 10.63 A	80.2 W	99%
410 W	310.5 W	29.1 V × 10.67 A	81.1 W	99%

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

Electrical & strength ratings

AXITEC datasheet

Max system voltage1,500 V (UL)
Max reverse current30 A
Fire rating (UL 61730)Type 1

Packaging: 36 per pallet

Bifacial performance

NLR SAM module library · AXITEC datasheet

BifacialYes
Bifaciality70 ± 10%
Back coverComposite film, cell gaps black

Rear gain depends on mounting height and ground reflectance; flush roof mounts receive little rear light.

Certifications

CEC PV Module List (Oct 7, 2026) · AXITEC datasheet

UL 61730UL 1703IEC 61730Fire rating Type 1 (UL 61730)

UL 61730CEC listing
UL 1703datasheet
IEC 61730datasheet
Fire rating Type 1 (UL 61730)datasheet

Warranty & degradation

AXITEC datasheet

Product warranty25 years
Performance warranty25 years

Inverter compatibility & string sizing

AXITEC 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)

CityColdest air, °CHottest cell, °CString inverter

39.5 V

Voc when cold

per panel

25 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.

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	3–15
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	4–15
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	5–15
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	10–12

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	39.5 / 25 V	⚠ Works; below MPPT at peak heat	1.38
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	39.5 / 25 V	✗ Not a match: module voltage below MPPT range	1.05
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	39.5 / 25 V	⚠ Works; below MPPT at peak heat	0.51
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	39.5 / 25 V	⚠ Works; below MPPT at peak heat	1.23
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	39.5 / 25 V	✗ Not a match: module voltage below MPPT range	1.15

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	670	12,067	6.08
Palmdale	1,835	734	13,212	6.69
Chula Vista	1,696	678	12,211	6.11
Huntington Beach	1,643	657	11,830	5.89
Riverside	1,696	678	12,211	6.21
Santa Clarita	1,724	690	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.

Compare with similar 400 W panels

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

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	PVEL (product / brand)	SoCal permits (series)
AXITEC AC-400MBT/108V	400 W	≥20.5%	−0.320	37.1	13.79	—	—
Qcells Q.PEAK DUO BLK ML-G10+ 400	400 W	≥20.4%	−0.362	45.3	11.14	product 2022, 2023	221
JA Solar JAM54S31-400/MR	400 W	≈21.1%	−0.329	37.07	13.79	product 2023, 2024	152
REC Group REC400AA Pure	400 W	≈22.3%	−0.256	48.8	10.25	brand 9× (2016–2025)	66

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.

Documents

manufacturer documents

PDF
AXIblackbipremium bifacial 108 cells XXL HC
Datasheet · AXITEC · Aug 2024
PDF
Warranty Terms Solar Modules
Warranty · AXITEC · Jun 2026

Questions & answers

How efficient is the AXITEC AC-400MBT/108V?

The AXITEC datasheet guarantees at least 20.5% module efficiency for the 400 W class (up to 21% for 410 W). 400 W over 1.95 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 670 kWh per year per 400 W panel in Los Angeles and about 734 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

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.

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 3–15 panels per string (Voc at 2 °C = 39.5 V, Vmp at 74 °C cell = 25 V). Final design must follow the inverter manual and NEC 690.7.

What does the warranty cover?

25 years on the product and 25 years on performance (manufacturer datasheet).

How big and heavy is it?

67.8 × 44.6 × 1.18 in (1,722 × 1,134 × 30 mm), 47.4 lb (21.5 kg).

Is it bifacial?

Yes, bifaciality 70 ± 10%. Rear gain depends on mounting height and ground reflectance.

What fire rating does it have?

UL 61730 fire rating Type 1 per datasheet.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
AXITEC — datasheet AXIblackbipremium bifacial 108 cells XXL HC.
Qcells — manufacturer datasheet “Q.PEAK DUO BLK ML-G10+ ENDURING HIGH PERFORMANCE”.
AXITEC — document library on the manufacturer’s website (links above).
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists.
NLR (formerly NREL) — System Advisor Model CEC module and inverter libraries (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 — Southern California permit portals. Equipment matched from permit descriptions.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).