44.6″ · 1,134 mm wide · 1.18″ (30 mm) frame · 54.5 lb (24.7 kg)

Solar panelURE (United Renewable Energy)

URE (United Renewable Energy) FBF425BFG-BB

Name: URE (United Renewable Energy) FBF425BFG-BB
Brand: URE (United Renewable Energy)

108 cells, TOPCon, bifacial, black glazed & semi-toughened glass, 2.0 mm thickness. Power classes 405–440 W in the CEC list.

CEC listed · Jul 22, 2024UL 61730BifacialTOPCon

Power class

Power (STC)425 WCEC nameplate
Efficiency≈21.8%calculated from area
%/°C Pmax−0.30CEC test: −0.296
Output at year 3087.4%performance warranty

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · 8 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
FBF405BFG-BB	405 W	37.68	13.83	31.02	13.07	≈20.7%	381 W	Jul 22, 2024
FBF410BFG-BB	410 W	37.75	13.91	31.14	13.17	≈21.0%	386 W	Jul 22, 2024
FBF415BFG-BB	415 W	37.92	13.99	31.33	13.24	≈21.3%	391 W	Jul 22, 2024
FBF420BFG-BB	420 W	38.11	14.07	31.52	13.32	≈21.5%	396 W	Jul 22, 2024
FBF425BFG-BB	425 W	38.40	14.16	31.72	13.40	≈21.8%	401 W	Jul 22, 2024
FBF430BFG-BB	430 W	38.50	14.24	31.89	13.50	≈22.0%	406 W	Jul 22, 2024
FBF435BFG-BB	435 W	38.63	14.30	32.06	13.57	≈22.3%	410 W	Jul 22, 2024
FBF440BFG-BB	440 W	38.79	14.37	32.26	13.64	≈22.5%	415 W	Jul 22, 2024

≈ efficiency = Pmax ÷ panel area 1.953 m² (datasheet size).

Build & dimensions

URE (United Renewable Energy) 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
Weight54.5 lb (24.7 kg)
Cells108 cellsTOPCon
Front glassAR-Coa"ng Semi-toughened glass, 2.0 mm thickness
Back coverBlack Glazed & Semi-toughened glass, 2.0 mm thickness
FrameBlack anodized aluminum profile

Heat & cold behaviour

URE (United Renewable Energy) datasheet · CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation

	Datasheet	CEC listing test
Pmax coefficient γ	−0.30 %/°C	−0.296 %/°C
Voc coefficient β	−0.26 %/°C	−0.241 %/°C
Isc coefficient α	+0.05 %/°C	+0.040 %/°C
Vmp coefficient	≈ −0.35 %/°C	—
Operating cell temperature	—	NOCT 45.7 °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
405 W	304.8 W	30.6 V × 9.96 A	77.3 W	95%
410 W	308.3 W	30.72 V × 10.04 A	78.2 W	95%
415 W	311.8 W	30.91 V × 10.09 A	79.1 W	95%
420 W	315.6 W	31.1 V × 10.15 A	80.1 W	95%
425 W	319.5 W	31.29 V × 10.21 A	81.1 W	95%
430 W	323.7 W	31.46 V × 10.29 A	82.1 W	95%
435 W	327.1 W	31.63 V × 10.34 A	83 W	95%
440 W	330.8 W	31.83 V × 10.39 A	83.9 W	95%

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

Electrical & strength ratings

Max system voltage1,500 V
Max series fuse30 A
Design load push / pull113 psf5,400 Pa

Certifications

CEC PV Module List (Oct 7, 2026) · URE (United Renewable Energy) datasheet

UL 61730IEC 61215IEC 61730

UL 61730CEC listing
IEC 61215datasheet
IEC 61730datasheet

Warranty & degradation

URE (United Renewable Energy) datasheet

Performance warranty30 years
Year 30≥ 87.4%

Inverter compatibility & string sizing

URE (United Renewable Energy) 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

40.7 V

Voc when cold

per panel

26.3 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	4–14
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	40.7 / 26.3 V	⚠ Works; below MPPT at peak heat	1.47
Enphase IQ8X-80-M-US	320–540 W	79.5 V	43–60 V	40.7 / 26.3 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	40.7 / 26.3 V	⚠ Works; below MPPT at peak heat	0.54
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	40.7 / 26.3 V	⚠ Works; below MPPT at peak heat	1.31
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	40.7 / 26.3 V	✗ Not a match: module voltage below MPPT range	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)
URE (United Renewable Energy) FBF425BFG-BB	425 W	≈21.8%	−0.296	38.4	14.16	67.8 × 44.6 in	—	—	—
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.

Documents

manufacturer documents

PDF
430 topcon bi-facial
Datasheet · URECO (United Renewable Energy) · Dec 2025

Questions & answers

How efficient is the URE (United Renewable Energy) FBF425BFG-BB?

Calculated from the panel area (1.95 m²): about 21.8% 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 = 40.7 V, Vmp at 74 °C cell = 26.3 V). Final design must follow the inverter manual and NEC 690.7.

What does the warranty cover?

30 years on performance: at least 87.4% after 30 years (manufacturer datasheet).

How big and heavy is it?

67.8 × 44.6 × 1.18 in (1,722 × 1,134 × 30 mm), 54.5 lb (24.7 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).
URE (United Renewable Energy) — datasheet 430 topcon bi-facial.
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.
URE (United Renewable Energy) — 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).