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Solaria Brand review

Solaria PowerXT-355R-AC

355 Wp Monocrystalline
ComparePV verdict

Middle of its segment, heavy for its output

Rank 12,098 of 14,005
Compare panels Datasheet PDF
Power (Wp)
355
Weak · bottom 16%
Efficiency (%)
19.60
Weak · bottom 20%
Density (Wp/m²)
196.2
Weak · bottom 21%
Temp (%/°C)
-
Not published
Weight (kg)
22.0
Weak · bottom 17%
Warranty (yrs)
25
Weak · bottom 22%

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

4,944 panels in the 255-455 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 19.60% 20.80% Weak · bottom 20% 12,589
Power density 196.2 207.9 Weak · bottom 21% 12,577
Temperature coefficient - -0.335 Not published 13,924
Weight per kWp 62.0 54.2 Weak · bottom 17% 12,718
Performance warranty 25 yrs 30 yrs Weak · bottom 22% 9,798
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

Weight-limited structures, tight roof space and roofs where every square metre has to count.

Watch-outs
62.0 kg per kWp

Bottom 17% of the 255-455 W band, against a median of 54.2.

19.60% module efficiency

Bottom 20% of the 255-455 W band, against a median of 20.80%.

196.2 watts per square metre

Bottom 21% of the 255-455 W band, against a median of 207.9.

Notes from the database
  • At 19.6% efficiency, this panel is 2.2pp below the database median of 21.8%
  • At 196.2 W/m², this panel generates 21.9 W/m² less per unit area than database median (218.1 W/m²)
  • At 22.0 kg, this panel is 4.5 kg lighter than database median (26.5 kg) - easier handling during installation
  • In the top 90% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 355 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.60 % Weak Segment median 20.80%
Vmpp · Impp 39.10 V · 9.09 A Operating point at max power
Voc · Isc 47.40 V · 9.53 A Sizes the string length
Dimensions 1621×1116×40 mm · 1.81 m² of roof
Weight 22.0 kg Weak Weak · bottom 17%
Product warranty 25 years Hardware defects only
Performance warranty 25 years Weak bottom 22% · median 30 yrs
End-of-warranty output 86.0 % Equals 296 W guaranteed
Degradation 2.00 → 0.50 % 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
-
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Solaria Solaria PowerXT-355R-AC 355 W 19.60% - 22.0 kg You are here
NS-330MH-80 330 W 23.15% -0.290 15.0 kg -25 W, lighter, +3.5 pp
NS-330MH-80 330 W 23.15% -0.290 15.0 kg -25 W, lighter, +3.5 pp
GKA210M320W 320 W 23.00% - 16.2 kg Lighter, +3.4 pp, +5 yr warranty
GKA210M340W 340 W 23.00% - 16.2 kg Lighter, +3.4 pp, +5 yr warranty
GKA210M360W 360 W 23.00% - 16.2 kg Lighter, +3.4 pp, +5 yr warranty
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg Lighter, +3.4 pp, +5 yr warranty
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg +45 W, +3.4 pp, +5 yr warranty
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg +45 W, +3.4 pp, +5 yr warranty
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg Lighter, +3.4 pp, +5 yr warranty
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg +45 W, +3.0 pp, +15 yr warranty
Solaria PowerXT®-360R-PD 360 W 19.90% -0.390 21.0 kg Lighter, +0.3 pp
Solaria PowerXT-365R-PD 365 W 20.20% -0.390 21.0 kg +10 W, lighter, +0.6 pp
Solaria PowerXT-370R-PD 370 W 20.50% -0.390 21.0 kg +15 W, lighter, +0.9 pp
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg +85 W, +3.5 pp, +5 yr warranty
SPV445-TM10-108 445 W 22.83% -0.300 21.5 kg +90 W, +3.2 pp, +5 yr warranty
LX-435M/182-108+ GG 435 W 22.81% -0.240 23.6 kg +80 W, +3.2 pp, +5 yr warranty

Found 8 panels of the same or similar size to this one, within ±10 mm. See them here Found 13 panels of the same or similar size to this one, within ±25 mm. See them here Found 20 panels of the same or similar size to this one, within ±50 mm. See them here Found 318 panels of the same or similar size to this one, within ±100 mm. See them here

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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