44.6″ · 1,134 mm wide · 1.18″ (30 mm) frame · 48.5 lb (22 kg)

Solar panelRegitec Solar

Regitec Solar RMHT54/425AB2

Name: Regitec Solar RMHT54/425AB2
Brand: Regitec Solar

108 half-cut cells, TOPCon, bifacial, glass (dual-glass module). Power classes 425–430 W in the CEC list; datasheet covers 420–440 W.

CEC listed · Mar 2, 2026UL 61730Bifacial30-yr product + 30-yr performance warrantyTOPCon

Power class

Power (STC)425 Wtolerance +5 / −0 W
Efficiency≥22.0%datasheet minimum
%/°C Pmax−0.30CEC test: −0.295
Performance warranty30 yrdatasheet

Power classes

CEC PV Module List (Oct 7, 2026) · Regitec Solar datasheet · 2 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
RMHT54/425AB2	425 W	38.59	14.17	32.16	13.22	≥22.0%	401 W	Mar 2, 2026
RMHT54/430AB2	430 W	38.72	14.25	32.34	13.30	≥22.0%	406 W	Mar 2, 2026

Build & dimensions

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

Dimensions67.8 × 44.6 × 1.18 in1,722 × 1,134 × 30 mm
Module area1.95 m² (21 ft²)length × width
Weight48.5 lb (22 kg)
Cells108 half-cut cellsTOPCon
Front glassFront ARC Solar Glass 1.6mm , Back Toughened Glass 1.6mm
Back coverGlass (dual-glass module)
FrameAnodized aluminum alloy
Junction boxIP68
Cable / connectorStaübli MC4

Heat & cold behaviour

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

	Datasheet	CEC listing test
Pmax coefficient γ	−0.30 %/°C	−0.295 %/°C
Voc coefficient β	−0.25 %/°C	−0.251 %/°C
Isc coefficient α	+0.04 %/°C	+0.047 %/°C
Vmp coefficient	≈ −0.34 %/°C	—
Operating cell temperature	NMOT 45 ± 2 °C	NOCT 45.7 °C

Vmp coefficient ≈ γ − α (datasheet); used only for the hot-roof voltage estimate.

At normal operating conditions (NOCT, 800 W/m²) — datasheet

Class	Pmax, W	Voc, V	Isc, A	Vmp, V	Imp, A
425 W	322.8	36.20	11.41	29.90	10.80
430 W	326.5	36.40	11.47	30.10	10.87

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
425 W	322.4 W	30.68 V × 10.51 A	83 W	98%
430 W	326.2 W	30.85 V × 10.57 A	84 W	98%

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

Electrical & strength ratings

Regitec Solar datasheet

Max system voltage1,500 V
Max series fuse25 A
Module temperature−40 °F to +185 °F−40 °C to +85 °C
Power tolerance+5 / −0 W

Packaging: 36 per pallet · 936 per container

Certifications

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

UL 61730ISO 14001ISO 45001ISO 9001

UL 61730CEC listing
ISO 14001factory, datasheet
ISO 45001factory, datasheet
ISO 9001factory, datasheet

Warranty & degradation

Regitec Solar datasheet

Product warranty30 years
Performance warranty30 years

Inverter compatibility & string sizing

Regitec 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)

CityColdest air, °CHottest cell, °CString inverter

40.8 V

Voc when cold

per panel

26.8 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	3–14
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	3–14
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–14
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	9–12

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	40.8 / 26.8 V	⚠ Works; below MPPT at peak heat	1.47
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	40.8 / 26.8 V	✗ Not a match: module voltage below MPPT range	1.12
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	40.8 / 26.8 V	⚠ Works; below MPPT at peak heat	0.54
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	40.8 / 26.8 V	⚠ Works; below MPPT at peak heat	1.31
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	40.8 / 26.8 V	⚠ Works; below MPPT at peak heat	1.22

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	712	11,397	6.08
Palmdale	1,835	780	12,478	6.69
Chula Vista	1,696	721	11,533	6.11
Huntington Beach	1,643	698	11,172	5.89
Riverside	1,696	721	11,533	6.21
Santa Clarita	1,724	733	11,723	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 425 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	Size	Warranty	PVEL (product / brand)	SoCal permits (series)
Regitec Solar RMHT54/425AB2	425 W	≥22%	−0.295	38.59	14.17	67.8 × 44.6 in	30 / 30 yr	—	—
Canadian Solar CS3N-425MS	425 W	≥20.9%	−0.332	45.5	11.8	—	25 yr	product 2023	46
Qcells Q.TRON BLK M-G2+ 425	425 W	≥21.8%	−0.276	39.03	13.66	67.8 × 44.6 in	25 / 25 yr	brand 11× (2016–2026)	40
Silfab Solar SIL-425QD	425 W	≈21.8%	−0.294	38.88	13.68	67.8 × 44.6 in	25 / 30 yr	brand 7× (2017–2025)	39

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 Regitec Solar RMHT54/425AB2?

The Regitec Solar datasheet guarantees at least 22% module efficiency for the 425 W class. 425 W over 1.95 m² equals about 218 W per square meter.

How much energy does one panel produce in Los Angeles or Palmdale?

PVWatts v8 with typical-year weather gives about 712 kWh per year per 425 W panel in Los Angeles and about 780 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.30 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 15.5% 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 3–14 panels per string (Voc at 2 °C = 40.8 V, Vmp at 74 °C cell = 26.8 V). Final design must follow the inverter manual and NEC 690.7.

What does the warranty cover?

30 years on the product and 30 years on performance (manufacturer datasheet).

How big and heavy is it?

67.8 × 44.6 × 1.18 in (1,722 × 1,134 × 30 mm), 48.5 lb (22 kg).

Is it bifacial?

Yes. Rear gain depends on mounting height and ground reflectance.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
Regitec Solar — manufacturer datasheet “POWERING THE FUTURE RMHT54/420~440AB2”.
Canadian Solar — manufacturer datasheet “HiKu Mono PERC CS3N-400|405|410|415|420|425MS MORE POWER”.
Qcells — manufacturer datasheet “Q.TRON BLK M-G2+ SERIES 415–440 Wp”.
Silfab Solar — datasheet NTC SIL-420 QD CELL TECHNOLOGY.
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).