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Solaria Brand review

SP370GHM6-54L

370 Wp PERC
ComparePV verdict

Middle of its segment, modest efficiency

Rank 12,867 of 14,005
Compare panels Datasheet PDF
Power (Wp)
370
Typical for its class
Efficiency (%)
18.94
Weak · bottom 14%
Density (Wp/m²)
189.8
Weak · bottom 14%
Temp (%/°C)
-0.350
Typical · median -0.350
Weight (kg)
21.0
Typical · median 21.4 kg
Warranty (yrs)
25
Typical · median 25 yrs

Solaria PowerXT 54L photovoltaic panels redefine standards of aesthetics and efficiency through the use of advanced shingled cell technology. This solution completely eliminates traditional busbars and unused gaps between cells, which not only translates into an elegant, uniform appearance but, above all, maximizes the active area of the module. Thanks to the unique parallel connection architecture, this series perfectly handles challenges such as shade resistance, significantly minimizing energy losses in difficult installation conditions. It is an ideal choice for demanding investors with limited roof space who do not want to compromise on maximum energy yields. The absence of visible soldered connections drastically increases the mechanical reliability of the entire structure, effectively protecting it against the formation of dangerous micro-cracks during long-term operation. Solaria PowerXT 54L stands out from the competition with an uncompromising all-black design that harmoniously blends with the modern architecture of residential buildings. By choosing these modules, you gain the assurance of longevity and the highest power density from every square meter of roofing, making them one of the most prestigious and cost-effective investments in the premium segment for home photovoltaic systems. The innovative design also ensures better thermal stability, which is crucial during hot days.

Ranking

579 panels in the segment PERC 350-400 W
Metric This panel Median Position in segment Overall rank
Module efficiency 18.94% 19.90% Weak · bottom 14% 12,988
Power density 189.8 199.0 Weak · bottom 14% 12,946
Temperature coefficient -0.350 -0.350 Typical 10,419
Weight per kWp 56.8 55.8 Typical 10,847
Performance warranty 25 yrs 25 yrs Typical 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 2 caution
Not ideal for

Tight roof space and roofs where every square metre has to count.

Watch-outs
18.94% module efficiency

Bottom 14% of the PERC 350-400 W segment, against a median of 19.90%.

189.8 watts per square metre

Bottom 14% of the PERC 350-400 W segment, against a median of 199.0.

Notes from the database
  • At 18.9% efficiency, this panel is 0.5pp below the PERC 0-400W median of 19.4%
  • At 189.8 W/m², this panel generates 4.7 W/m² less per unit area than PERC 0-400W median (194.4 W/m²)
  • At -0.35%/°C, hot weather performance is typical for PERC 0-400W panels
  • In the top 93% for efficiency among all PERC panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 370 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 18.94 % Weak Segment median 19.90%
Vmpp · Impp 32.32 V · 11.69 A Operating point at max power
Voc · Isc 38.02 V · 12.40 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1721×1133×30 mm · 1.95 m² of roof
Weight 21.0 kg Typical Typical · median 21.4 kg
Cells 108 · PERC Monocrystalline
Coefficient Pmax -0.350 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.275 · 0.045 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Typical median 25 yrs · median 25 yrs
End-of-warranty output 84.8 % Equals 304 W guaranteed
Degradation 2.00 % First year

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
-0.350 %/°C against a segment median of -0.350
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Solaria SP370GHM6-54L 370 W 18.94% -0.350 21.0 kg You are here
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +4.2 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg Cooler, lighter, +4.2 pp
GKA210M320W 320 W 23.00% - 16.2 kg -50 W, +4.1 pp, +5 yr warranty
GKA210M340W 340 W 23.00% - 16.2 kg Lighter, +4.1 pp, +5 yr warranty
GKA210M360W 360 W 23.00% - 16.2 kg Lighter, +4.1 pp, +5 yr warranty
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg Lighter, +4.1 pp, +5 yr warranty
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +30 W, +4.1 pp, +5 yr warranty
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +30 W, +4.1 pp, +5 yr warranty
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg Lighter, +4.1 pp, +5 yr warranty
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg Cooler, +3.7 pp, +15 yr warranty
SP310RHM6-54L 310 W 15.87% -0.350 21.0 kg -60 W, -3.1 pp
SP350YHM6-54L 350 W 17.92% -0.350 21.0 kg -20 W, -1.0 pp
SP380BHM6-54L 380 W 19.45% -0.350 21.0 kg +10 W, +0.5 pp
Solaria PowerX-390R 390 W 20.00% -0.360 22.1 kg +20 W, heavier, +1.1 pp
Solaria PowerX-395R 395 W 20.20% -0.360 22.1 kg +25 W, heavier, +1.3 pp
Solaria PowerX-400R 400 W 20.50% -0.360 22.1 kg +30 W, heavier, +1.6 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +140 W, cooler, +6.1 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3978 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty does the Solaria PowerXT 54L come with?
The Solaria PowerXT 54L carries a 12-year product warranty covering material and workmanship defects. In addition, Solaria provides a 25-year linear power output warranty, guaranteeing the module will produce a defined minimum percentage of its rated 380 Wp throughout that period. Both coverages are consistent with premium-tier residential solar standards and reflect the long-term reliability of the shingled cell design.
How does the Solaria PowerXT 54L handle partial shading from a chimney or antenna?
The shingled cell architecture in the Solaria PowerXT 54L connects cells in parallel strings, so shading one section of the module does not dramatically cut the output of the entire panel. According to manufacturer data, this design delivers up to 40% better performance under partial shading compared to conventional busbar-based panels, making it well-suited for residential rooftops with chimneys, dormers, or antennas.
What are PERC shingled cells and why does Solaria use them in the PowerXT 54L?
Shingled cells are PERC solar cells sliced into thin strips and overlapped like roof shingles, bonded with conductive adhesive instead of soldered busbars. In the Solaria PowerXT 54L, this eliminates inter-cell gaps, maximizes the active front-side area of the module, and significantly reduces the risk of microcracks since no soldering is involved. The resulting assembly handles mechanical stress and thermal cycling much better over the full 25-year power warranty period.
What is the peak power of the Solaria PowerXT 54L and is it a good fit for a small roof?
The Solaria PowerXT 54L is rated at 380 Wp peak. By eliminating busbars and inter-cell gaps, the module achieves high power density, meaning more watts per square meter of roof area. This makes it an ideal choice for homeowners with limited roof space who want to maximize energy yield without expanding the number of modules in their system or rethinking the mounting structure.
Does the all-black design of the Solaria PowerXT 54L affect operating temperature and efficiency?
The all-black surface can slightly raise the module's operating temperature compared to standard panels, but the Solaria PowerXT 54L is engineered for thermal stability. The shingled cell construction improves heat management by removing soldered busbars, which reduces mechanical stress during thermal cycling. The aesthetic benefit of the all-black finish, which complements modern residential architecture, does not represent a meaningful efficiency trade-off in real-world conditions.
Is the Solaria PowerXT 54L a bifacial panel — does it generate power from both sides?
No, the Solaria PowerXT 54L is a monofacial module — electricity is generated only from the front side. The panel uses an opaque backsheet, so it does not collect reflected irradiance from the ground or rooftop surface. This is offset by the shingled cell layout, which maximizes the front-side active area to deliver 380 Wp from a compact, uniform all-black module footprint.
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