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Solitek Brand review

SOLID Bifacial 370

370 Wp Monocrystalline Bifacial
ComparePV verdict

Middle of its segment, heavy for its output

Rank 11,029 of 14,129
Compare panels Datasheet PDF
Power (Wp)
370
Weak · bottom 17%
Efficiency (%)
19.57
Weak · bottom 17%
Density (Wp/m²)
195.7
Weak · bottom 18%
Temp (%/°C)
-0.362
Weak · bottom 11%
Weight (kg)
32.0
Weak · 10.0 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The SOLID Bifacial series is a sophisticated photovoltaic module featuring a glass-glass design, manufactured by the European company SoliTek in Lithuania. Thanks to the bifacial technology, the panels generate energy from both sides - both from the front and from the back of the glass surface, which, under optimal conditions, results in significantly higher energy production compared to traditional modules in a glass-film laminate. The series stands out for its exceptional durability - the double layer of tempered glass effectively protects the cells from mechanical damage and harsh environmental conditions, ensuring long-term reliability of the installation. Another advantage is the prestigious Cradle to Cradle Gold certification, which confirms the manufacturer's environmental responsibility and the possibility of full recycling of components - an increasingly important aspect for investors concerned about the carbon footprint of their investment. The manufacturer stands out in the market with an exceptionally long product warranty, covering high efficiency for decades of operation - one of the best standards in the industry. The series is available in frameless, aluminum-framed, and full black versions, ideal for aesthetically demanding projects. SOLID Bifacial will be suitable for standard roof installations, BIPV systems, and agrophotovoltaics, where bifacial illumination of the cells is crucial for the profitability of the project.

Ranking

5,748 panels in the 270-470 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 19.57% 21.03% Weak · bottom 17% 12,718
Power density 195.7 210.2 Weak · bottom 18% 12,691
Temperature coefficient -0.362 -0.320 Weak · bottom 11% 13,124
Weight per kWp 86.5 53.7 Weak · bottom 1% 13,959
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 · 3 caution
Best for

Residential, commercial, agrivoltaic and BIPV.

Not ideal for

Weight-limited structures, hot climates and tight roof space.

Watch-outs
86.5 kg per kWp

Bottom 1% of the 270-470 W band, against a median of 53.7. Ranked 13,959th in the whole database.

-0.362 %/°C temperature coefficient

Bottom 11% of the 270-470 W band, against a median of -0.320.

19.57% module efficiency

Bottom 17% of the 270-470 W band, against a median of 21.03%.

Notes from the database
  • At 19.6% efficiency, this panel is 2.3pp below the database median of 21.8%
  • At 195.7 W/m², this panel generates 22.4 W/m² less per unit area than database median (218.1 W/m²)
  • -0.36%/°C temperature coefficient - 0.06pp worse than database median (-0.30%/°C), expect higher hot weather losses
  • At 32.0 kg (5.5 kg above database median of 26.5 kg), requires checking roof load capacity
  • #12718 for efficiency, #13124 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 370 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.57 % Weak Segment median 21.03%
Vmpp · Impp 34.86 V · 10.62 A Operating point at max power
Voc · Isc 40.50 V · 11.18 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1782×1061×35 mm · 1.89 m² of roof
Weight 32.0 kg Weak Weak · 10.0 kg above median
Cells 60 Monocrystalline
Coefficient Pmax -0.362 %/°C Weak bottom 11% of its segment
Coefficient Voc · Isc -0.265 · 0.036 %/°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 87.0 % Equals 322 W guaranteed
Degradation 2.00 → 0.38 % First year, then annual

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
-0.362 %/°C against a segment median of -0.320
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Solitek SOLID Bifacial 370 370 W 19.57% -0.362 32.0 kg You are here
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, 17 kg lighter, +3.6 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, 17 kg lighter, +3.6 pp
GKA210M320W 320 W 23.00% - 16.2 kg -50 W, 16 kg lighter, +3.4 pp
GKA210M340W 340 W 23.00% - 16.2 kg -30 W, 16 kg lighter, +3.4 pp
GKA210M360W 360 W 23.00% - 16.2 kg -10 W, 16 kg lighter, +3.4 pp
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg +10 W, lighter, +3.4 pp
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +30 W, lighter, +3.4 pp
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +30 W, lighter, +3.4 pp
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg +10 W, lighter, +3.4 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Lighter, +3.0 pp, +10 yr warranty
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +140 W, cooler, +5.4 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +125 W, lighter, +5.2 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +135 W, cooler, +5.1 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg +135 W, cooler, +5.1 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +120 W, lighter, +4.9 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +130 W, cooler, +4.9 pp

Found 37 panels of the same or similar size to this one, within ±10 mm. See them here Found 131 panels of the same or similar size to this one, within ±25 mm. See them here Found 390 panels of the same or similar size to this one, within ±50 mm. See them here Found 4203 panels of the same or similar size to this one, within ±100 mm. See them here

About the SOLID Bifacial series

6 answered

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

How much more energy does the SoliTek SOLID Bifacial panel produce compared to conventional glass-foil modules?
Under optimal conditions, the SOLID Bifacial series can generate up to 35% more energy than standard glass-foil modules. The rear glass pane captures diffuse and reflected light from the ground and redirects it to the solar cells, increasing annual yield. The bifacial gain is highest with bright surfaces beneath the array (snow, light gravel, concrete) and elevated or tilted mounting configurations, such as agrivoltaic systems.
What warranty does SoliTek offer on the SOLID Bifacial series and what does it cover?
SoliTek provides a 30-year product warranty and a 30-year power output warranty for the entire SOLID Bifacial series. After 30 years of operation, each panel is guaranteed to retain at least 90% of its rated output power. This is among the longest warranty standards available from a European manufacturer and is particularly relevant for commercial rooftop and ground-mounted systems with long investment payback periods.
Are SoliTek SOLID Bifacial panels suitable for agrivoltaic installations?
Yes, the SOLID Bifacial series is specifically well-suited for agrivoltaic applications. The glass-glass construction provides resistance to ammonia (present near livestock operations) and salt mist, while the frameless transparent variant allows diffuse light to pass through to crops below. Elevated mounting over fields means reflected light from soil and vegetation reaches the rear cell surface, maximizing bifacial energy yield throughout the day.
What does the Cradle to Cradle Gold certification on SoliTek SOLID Bifacial panels mean and does it matter for buyers?
The Cradle to Cradle Gold certification confirms that SoliTek meets strict environmental standards covering full recyclability of components, safe material composition, responsible water management, and fair labor practices. For investors reporting carbon footprint data or applying for ESG-linked financing, this certification is a meaningful differentiator, setting the SOLID Bifacial series apart from the majority of Asian-manufactured modules that carry no equivalent certification.
Can SoliTek SOLID Bifacial modules withstand heavy hail and high winds?
Yes. The dual 3.2 mm heat-strengthened glass panes make the SOLID Bifacial series among the thickest modules on the market. The panels are rated to Hail Class 5, meaning they withstand ice balls up to 50 mm in diameter. Wind resistance has been tested up to 320 km/h, making them suitable for demanding coastal and mountain locations where standard glass-foil modules would be at greater risk of damage.
What variants of the SoliTek SOLID Bifacial panel are available, and which one works best for a rooftop installation?
The SOLID Bifacial series is offered in three variants: frameless (lightweight, ideal for BIPV and clamp-based racking systems), aluminum-framed (up to 435 W, straightforward installation on standard rooftop mounting structures), and full black (black frame and black cells, designed for aesthetically demanding projects on dark roof tiles). For a typical pitched roof, the framed variant is the most practical choice since it is compatible with the vast majority of racking systems available on the market.
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