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Solaria Brand review

PowerXT 420R-PL

420 Wp Monocrystalline
ComparePV verdict

Middle of its segment, weak in heat

Rank 9,324 of 14,005
Compare panels Datasheet PDF
Power (Wp)
420
Typical for its class
Efficiency (%)
19.90
Weak · bottom 15%
Density (Wp/m²)
198.9
Weak · bottom 15%
Temp (%/°C)
-0.390
Weak · bottom 2%
Weight (kg)
21.7
Typical · median 23.0 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 or reliability. A key advantage is the "shingled” technology (module layout), which minimizes unused space on the module and reduces losses associated with traditional connections. This allows the panels to offer <b>high power density, which is particularly beneficial when every square meter counts - in residential homes, multi-family buildings, and small commercial installations.

PowerXT also features improved performance in partially shaded conditions - parallel connections between the strings minimize power loss when a shadow from a chimney, tree, or skylight covers part of the module. In addition, connections without tape and soldering are used, which reduces the number of potential failure points over the long term. The overall design features a uniform, “pure black” appearance, ideal for investors who prioritize a consistent architectural style.

Ranking

6,930 panels in the 320-520 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 19.90% 21.50% Weak · bottom 15% 12,331
Power density 198.9 215.0 Weak · bottom 15% 12,344
Temperature coefficient -0.390 -0.300 Weak · bottom 2% 13,579
Weight per kWp 51.7 53.0 Typical 5,023
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 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 320-520 W band, against a median of -0.300. Ranked 13,579th in the whole database.

19.90% module efficiency

Bottom 15% of the 320-520 W band, against a median of 21.50%.

198.9 watts per square metre

Bottom 15% of the 320-520 W band, against a median of 215.0.

Notes from the database
  • At 19.9% efficiency, this panel is 1.9pp below the database median of 21.8%
  • At 198.9 W/m², this panel generates 19.2 W/m² less per unit area than database median (218.1 W/m²)
  • Temperature coefficient of -0.39%/°C is 0.09pp worse than database median (-0.30%/°C) - higher losses in summer heat
  • Weight of 21.7 kg (4.8 kg below database median of 26.5 kg) allows easier transport and roof mounting
  • Ranked #12331 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 420 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.90 % Weak Segment median 21.50%
Vmpp · Impp 37.90 V · 11.09 A Operating point at max power
Voc · Isc 45.70 V · 11.60 A Sizes the string length
Max system voltage 1000 V Longer strings than 1000 V modules
Dimensions 1957×1079×35 mm · 2.11 m² of roof
Weight 21.7 kg Typical Typical · median 23.0 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 353 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 PowerXT 420R-PL 420 W 19.90% -0.390 21.7 kg You are here
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +45 W, cooler, +3.9 pp
LX-465M/182R-96+ GG 465 W 23.80% -0.260 23.5 kg +45 W, cooler, +3.9 pp
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg Cooler, +3.8 pp, +10 yr warranty
AIKO-A470-MAH54Mb 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +3.7 pp
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg +40 W, cooler, +3.7 pp
HSM-BD54-LA470 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +3.7 pp
PowerXT 430R-PL 430 W 20.40% -0.390 21.7 kg +10 W, +0.5 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +140 W, cooler, +4.9 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +135 W, cooler, +4.7 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +130 W, cooler, +4.5 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg +120 W, cooler, +4.5 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg +120 W, cooler, +4.5 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +125 W, cooler, +4.4 pp
LR7-60HVH-545M 545 W 24.20% -0.260 25.0 kg +125 W, cooler, +4.3 pp

Found 2 panels of the same or similar size to this one, within ±10 mm. See them here Found 2 panels of the same or similar size to this one, within ±25 mm. See them here Found 42 panels of the same or similar size to this one, within ±50 mm. See them here Found 1932 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 a new product. A limited number of modules may still be available from distributors' existing stock, but full product range availability and continuous supply should not be expected. If you are planning an installation, check with your supplier for current inventory levels or consider comparable alternatives with similar shingled-cell technology.
How does the shingled cell technology in Solaria PowerXT panels work and does it actually deliver more energy?
Shingled technology cuts cells into narrow strips that are layered and bonded without busbars or soldering ribbons. This eliminates inactive gaps on the module surface and reduces resistive losses. In practice, Solaria PowerXT achieves higher power density per square meter than conventional PERC modules, translating into more energy harvested from the same roof area — a meaningful advantage when roof space is limited.
What warranty does the Solaria PowerXT panel carry and what does it cover?
Solaria PowerXT comes with a 30-year product warranty and a 30-year power output warranty — notably longer than the 25-year standard offered by most manufacturers. The product warranty covers manufacturing defects, while the power warranty guarantees the module will still produce a specified percentage of its rated output after 30 years. Since the series is discontinued, verifying warranty enforcement terms with your supplier before purchasing remaining stock is advisable.
How does the Solaria PowerXT handle partial shading from a chimney or trees?
The shingled architecture connects cell sub-strings in parallel, so shading from a chimney, tree, or dormer window causes a significantly smaller drop in energy yield compared to standard modules. The absence of solder joints and busbars also reduces hot-spot formation. Solaria PowerXT is a strong choice for rooftops with shading obstacles, though maximum performance is always achieved on a fully unobstructed surface.
Is the Solaria PowerXT panel bifacial — does it generate power from both sides?
No, the Solaria PowerXT series up to 430 Wp is a monofacial module — power is generated from the front side only. The rear surface features a uniform pure black finish that enhances the aesthetic appearance of the installation but does not capture additional reflected irradiance from the ground or rooftop surface.
What is the maximum power output of the Solaria PowerXT and what type of installations is it best suited for?
The top variant in the Solaria PowerXT lineup reaches 430 Wp. Its high power density makes it well suited for residential prosumer installations on single-family and multi-family homes where roof area is at a premium. It also fits small commercial rooftop systems. The pure black aesthetics appeal to homeowners who prioritize a clean, architecturally consistent look for their building.
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