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Solitek SOLID Bifacial 425
Solitek Brand review

SOLID Bifacial 425

425 Wp TOPCon Bifacial
ComparePV verdict

Middle of its segment, heavy for its output

Rank 7,350 of 14,129
Compare panels Datasheet PDF
Power (Wp)
425
Typical for its class
Efficiency (%)
21.76
Typical · median 22.00%
Density (Wp/m²)
215.6
Typical · median 220.2
Temp (%/°C)
-0.300
Typical · median -0.290
Weight (kg)
33.0
Weak · 11.0 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The SOLID Bifacial Anti-Glare series from SoliTek is a unique solution for installations that require both high aesthetics and environmental safety. A key innovation is the Satin glass with a special surface structure, which reduces light reflection to below 3600 cd/m², while standard panels achieve over 10,000 cd/m². Importantly, this effect is achieved without additional coatings or films - solely through the processing of the glass itself, which ensures the long-term durability of the anti-glare properties. This makes the modules the ideal choice for installations on roads, airports, hiking trails, public buildings, and historic sites, where blinding reflections could pose a hazard or cause discomfort to the surroundings. The TOPCon n-type bifacial technology allows for energy generation from both sides of the panel, increasing output even in diffuse light conditions. The glass-glass construction provides exceptional mechanical strength, IP68 sealing, fire class A certification, and resistance to ammonia and salt fog. The series is available in aesthetically pleasing full-black versions - both framed and frameless - making it a flexible solution for roof and facade installations. The entire product is covered by a 30-year product and performance warranty.

Ranking

1,220 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.76% 22.00% Typical 7,349
Power density 215.6 220.2 Typical 7,784
Temperature coefficient -0.300 -0.290 Typical 6,152
Weight per kWp 77.6 51.5 Weak · bottom 2% 13,802
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 1 caution
Best for

Residential, commercial and BIPV.

Not ideal for

Weight-limited structures.

Watch-outs
77.6 kg per kWp

Bottom 2% of the TOPCon 400-450 W segment, against a median of 51.5. Ranked 13,802nd in the whole database.

Notes from the database
  • At 21.8% efficiency, this panel is on par with typical TOPCon 400-450W modules
  • 215.6 W/m² power density is 4.6 W/m² below TOPCon 400-450W median (220.2 W/m²) - requires larger installation area
  • Temperature coefficient of -0.30%/°C matches the TOPCon 400-450W median
  • At 33.0 kg, this panel is 11.0 kg heavier than the TOPCon 400-450W median (22.0 kg) - more demanding for installation crews
  • Ranked #7349 out of 14129 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 425 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.76 % Typical Segment median 22.00%
Vmpp · Impp 32.57 V · 13.05 A Operating point at max power
Voc · Isc 38.65 V · 13.70 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1729×1140×7 mm · 1.97 m² of roof
Weight 33.0 kg Weak Weak · 11.0 kg above median
Cells 108 · TOPCon Monocrystalline
Coefficient Pmax -0.300 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 46 °C At 800 W/m², 20 °C ambient
Product warranty 30 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 90.0 % Equals 383 W guaranteed
Degradation 1.00 → 0.31 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Solitek in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 425 Wp appear here. The rest cover the whole series.

Power output warranty Power output warranty Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.300 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Solitek SOLID Bifacial 425 425 W 21.76% -0.300 33.0 kg You are here
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg Lighter, +2.2 pp, +10 yr warranty
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +40 W, lighter, +2.0 pp
JAT54S40-475/LR 475 W 23.80% -0.260 19.3 kg +50 W, lighter, +2.0 pp
TWMNH-48HW475 475 W 23.80% -0.280 23.7 kg +50 W, lighter, +2.0 pp
CHSM48RN(DG)/F-BH-475 475 W 23.80% -0.290 24.5 kg +50 W, lighter, +2.0 pp
AIKO-A475-MCE54Mw 475 W 23.80% -0.260 21.0 kg +50 W, lighter, +2.0 pp
AIKO-A475-MAH54Mw 475 W 23.80% -0.260 21.5 kg +50 W, lighter, +2.0 pp
SOLID Agro 290 290 W 14.71% -0.300 32.0 kg -135 W, lighter, -7.1 pp
SOLID Bifacial Anti-Glare 425 425 W 21.76% -0.300 33.0 kg Very close match
SOLID 435 Bifacial Transparent 435 W 22.27% -0.300 33.0 kg +10 W, +0.5 pp
SOLID Bifacial Full black 435 435 W 22.07% -0.300 32.0 kg +10 W, lighter, +0.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +85 W, lighter, +3.2 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +70 W, lighter, +3.0 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +80 W, lighter, +2.9 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg +80 W, lighter, +2.9 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +65 W, lighter, +2.7 pp

Found 1825 panels of the same or similar size to this one, within ±10 mm. See them here Found 1933 panels of the same or similar size to this one, within ±25 mm. See them here Found 3413 panels of the same or similar size to this one, within ±50 mm. See them here Found 3846 panels of the same or similar size to this one, within ±100 mm. See them here

About the SOLID series Bifacial Anti-Glare series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

What makes the SoliTek SOLID Bifacial Anti-Glare different from standard solar panels in terms of glare reduction?
The SoliTek SOLID Bifacial Anti-Glare series uses SATIN glass with a specially structured surface that reduces reflected luminance to below 3,600 cd/m², compared to over 10,000 cd/m² for standard panels. Crucially, this is achieved without any additional coatings or films - solely through glass processing - which ensures the anti-glare properties remain effective for the full 30-year service life without degradation.
Can SoliTek SOLID Bifacial Anti-Glare 425W panels be installed on both pitched rooftops and building facades?
Yes. The series is available in framed variants (35 mm and 40 mm aluminum frame) and a frameless version, all in a full-black aesthetic. Frameless modules are well-suited for facade and BIPV applications, while framed versions work on pitched and flat rooftops. The glass-glass construction with IP68-rated junction box and Fire Class A certification meets the requirements for public buildings and listed heritage sites.
What warranty does SoliTek offer on the SOLID Bifacial Anti-Glare series?
SoliTek provides a 30-year product warranty and a 30-year power output warranty on the SOLID Bifacial Anti-Glare series. This covers both physical defects and guaranteed performance retention, making it one of the longest combined warranties available in the European market - many competitors offer only 25-year terms.
Does bifacial TOPCon technology deliver real gains in Central European climates with frequent cloud cover?
Yes. N-type TOPCon cells perform especially well under diffuse irradiance, which dominates in Central Europe during autumn and winter. The low temperature coefficient of Pmax at -0.300%/°C minimizes summer power losses, while the bifacial design captures albedo-reflected light from the rear side. In typical Central European conditions, the bifacial gain is estimated at 5-15% depending on ground albedo and tilt angle.
How heavy is the SoliTek SOLID Bifacial Anti-Glare 425W module and do standard roof structures handle the load?
The module weighs approximately 33 kg due to the dual 3.2 mm glass-glass construction - noticeably heavier than glass-backsheet panels at around 20-22 kg. A structural assessment of the roof or mounting surface is advisable before installation. In return, the glass-glass build delivers snow load resistance up to 10,500 Pa, wind load resistance up to 4,500 Pa, and certified ammonia and salt mist resistance for harsh environments.
Where are SoliTek SOLID Bifacial Anti-Glare panels manufactured and what certifications do they carry?
SoliTek is a Lithuanian manufacturer based in Vilnius, producing modules within the European Union - which eliminates import tariff risk and shortens the supply chain. The panels carry Fire Class A certification, IP68-rated junction box, ammonia resistance, and salt mist resistance certifications. SoliTek is also among the few European PV manufacturers holding the Cradle to Cradle certification, verifying responsible materials management.
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