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Solaria Brand review

Solaria PowerXT-400R-PM

400 Wp Monocrystalline
ComparePV verdict

Middle of its segment, weak in heat

Rank 9,549 of 14,005
Compare panels Datasheet PDF
Power (Wp)
400
Weak · bottom 24%
Efficiency (%)
20.20
Weak · bottom 22%
Density (Wp/m²)
202.1
Weak · bottom 22%
Temp (%/°C)
-0.390
Weak · bottom 2%
Weight (kg)
21.0
Typical · median 22.5 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Solaria PowerXT series is designed to maximize energy generation from the same roof area - without compromising aesthetics. The modules feature shingled technology and a refined connection architecture, ensuring high efficiency even when part of the surface is intermittently shaded by a chimney, skylight, or balustrade. This is a real advantage in Polish conditions, where roofs are rarely perfectly uniform and free from obstructions.

PowerXT also emphasizes uniform, deep black (Pure Black) - without visible gaps between the cells and without a "lattice" effect, which will be appreciated by investors who care about the appearance of the facade. Another advantage is high power density, which helps to reduce the number of modules and simplify the design of installations on roofs with limited area.

This solution is particularly suitable for single-family homes and premium projects, where resistance to shading losses and long-term peace of mind thanks to comprehensive warranty protection are important.

Ranking

6,519 panels in the 300-500 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 20.20% 21.30% Weak · bottom 22% 11,956
Power density 202.1 212.6 Weak · bottom 22% 11,987
Temperature coefficient -0.390 -0.300 Weak · bottom 2% 13,579
Weight per kWp 52.5 53.2 Typical 6,043
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 and shaded-installations.

Not ideal for

Hot climates, tight roof space and roofs where every square metre has to count.

Watch-outs
-0.390 %/°C temperature coefficient

Bottom 2% of the 300-500 W band, against a median of -0.300. Ranked 13,579th in the whole database.

20.20% module efficiency

Bottom 22% of the 300-500 W band, against a median of 21.30%.

202.1 watts per square metre

Bottom 22% of the 300-500 W band, against a median of 212.6.

Notes from the database
  • Module efficiency of 20.2% is 1.6pp below average for database panels (median: 21.8%)
  • Power density of 202.1 W/m² is 16.0 W/m² below database median (218.1 W/m²) - needs more roof space
  • Temperature coefficient of -0.39%/°C is 0.09pp worse than database median (-0.30%/°C) - higher losses in summer heat
  • Weight of 21.0 kg (5.5 kg below database median of 26.5 kg) allows easier transport and roof mounting
  • Ranked #11956 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 400 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.20 % Weak Segment median 21.30%
Vmpp · Impp 42.40 V · 9.41 A Operating point at max power
Voc · Isc 51.10 V · 9.82 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1644×1204×40 mm · 1.98 m² of roof
Weight 21.0 kg Typical Typical · median 22.5 kg
Coefficient Pmax -0.390 %/°C Weak bottom 2% of its segment
Coefficient Voc · Isc -0.290 · 0.040 %/°C
NOCT 45 °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 84.0 % Equals 336 W guaranteed
Degradation 2.00 → 0.48 % 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
-0.390 %/°C against a segment median of -0.300
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Solaria Solaria PowerXT-400R-PM 400 W 20.20% -0.390 21.0 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg +40 W, cooler, +2.9 pp
JST-EDMH-(445-465)W-TD (450W class) 450 W 23.05% -0.300 20.5 kg +50 W, cooler, +2.9 pp
QNN182-HG450-54 450 W 23.04% -0.290 24.0 kg +50 W, cooler, +2.8 pp
HY440-N108BDD 450 W 23.04% -0.300 23.5 kg +50 W, cooler, +2.8 pp
NLBK-27-450 450 W 23.04% -0.300 22.9 kg +50 W, cooler, +2.8 pp
RS41-450NBG-E3 450 W 23.04% -0.290 24.5 kg +50 W, cooler, +2.8 pp
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +65 W, cooler, +3.6 pp
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg +60 W, cooler, +3.4 pp
JST-EDMH-(445-465)W-TD (460W class) 460 W 23.56% -0.300 20.5 kg +60 W, cooler, +3.4 pp
PS-MNB108(HCBF)-460W 460 W 23.53% -0.290 20.5 kg +60 W, cooler, +3.3 pp
AIKO-455-MAH54Db 455 W 23.30% -0.260 24.0 kg +55 W, cooler, +3.1 pp
LR5-54HTH-455M 455 W 23.30% -0.290 20.8 kg +55 W, cooler, +3.1 pp

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Common questions

6 answered
Is the Solaria PowerXT series still available for purchase?
The Solaria PowerXT series has been discontinued and is no longer offered as new stock by authorized distributors. Occasional units may surface in installer warehouses or on the secondary market, but availability is severely limited. If you are planning a new installation, ask your installer about currently available modules with comparable specifications.
How does the shingled cell technology in Solaria PowerXT panels work?
The shingled technology cuts monocrystalline cells into narrow strips that overlap like roof shingles and are bonded with an electrically conductive adhesive instead of traditional busbars. This allows more cells per panel area, and the parallel string architecture ensures that shading one zone does not shut down the entire string. Third-party outdoor tests showed PowerXT generates 64–83% more energy under partial shading conditions compared to conventional modules.
What warranty does the Solaria PowerXT come with, and what does it cover?
Solaria PowerXT carries a 30-year product warranty and a 30-year linear power output warranty. This means the module is guaranteed to maintain the manufacturer-specified power level for three decades. It is one of the longest warranty terms in the residential PV segment and is a key argument for premium single-family home installations where long-term reliability matters.
Are Solaria PowerXT 400 Wp panels suitable for a roof with a chimney or dormers?
Yes, this is one of the primary use cases for this series. The shingled cell technology and parallel interconnect architecture make PowerXT modules significantly more shade-tolerant than conventional PERC panels with busbars. A chimney, railing, or dormer shading part of the panel surface does not suppress output from the unshaded cells, which is a measurable advantage on the complex rooflines common in Polish residential construction.
Is the Solaria PowerXT a bifacial solar panel?
No, the Solaria PowerXT is a monofacial module with no rear-side power generation. It produces electricity solely from front-side irradiance. This is offset by high power density (up to 400 Wp) and the shingled architecture's effective shade loss mitigation, which on typical rooftop residential installations provides more practical benefit than bifacial gain.
How does the aesthetics of Solaria PowerXT compare to standard all-black modules?
Solaria PowerXT features a Pure Black finish: uniform deep black with no visible gaps between cells and no silver or white busbars. The result is noticeably cleaner than standard full-black PERC modules that still show grid lines under direct light. This is a strong argument for installations on upscale residential properties or any project where roof appearance is a priority.
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