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Rarlon PV Tech Brand review

RL305HP-120

305 Wp PERC
ComparePV verdict

Middle of its segment, weak in heat

Rank 13,812 of 14,005
Compare panels Datasheet PDF
Power (Wp)
305
Weak · bottom 9%
Efficiency (%)
18.30
Typical · median 19.00%
Density (Wp/m²)
180.8
Typical · median 190.0
Temp (%/°C)
-0.390
Weak · bottom 15%
Weight (kg)
18.5
Typical · median 19.0 kg
Warranty (yrs)
-
Not published

The Rarlon PV Tech RL290HP-310HP-120 series is designed for stable operation in real-world installation conditions, even in areas where partial shading, dirt, or uneven sunlight exposure occurs. The use of a 120-cell configuration helps to better manage current flow in the module and reduce losses due to partial shading. This is a practical advantage in rooftop installations for homes, small businesses, and commercial buildings, where shade from chimneys, trees, or skylights is common.

Another noteworthy feature is the positive power tolerance - the module is guaranteed to deliver at least its specified performance, which simplifies installation design and yield predictions. The construction also supports resistance to external conditions thanks to tempered glass and an anodized aluminum frame, which ensures durability in windy and snowy conditions.

This series is for investors who want a good balance: solid quality, predictable performance, and compatibility with popular mounting solutions - without paying extra for features that don't increase yields in Polish conditions.

Ranking

286 panels in the segment PERC 300-350 W
Metric This panel Median Position in segment Overall rank
Module efficiency 18.30% 19.00% Typical 13,161
Power density 180.8 190.0 Typical 13,188
Temperature coefficient -0.390 -0.360 Weak · bottom 15% 13,579
Weight per kWp 60.7 60.0 Typical 12,503
Performance warranty - 25 yrs Not published 13,880
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 4 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Hot climates.

Watch-outs
-0.390 %/°C temperature coefficient

Bottom 15% of the PERC 300-350 W segment, against a median of -0.360.

What owners get
120-cell layout reduces partial-shading losses

Splitting the module into 120 cells with corresponding bypass sections manages current flow better under partial shading (chimney, tree, dormer) than classic 60-cell layouts, limiting yield drops in typical residential rooftop installations.

Positive power tolerance

The module is rated with a 0/+W power tolerance, meaning actual output should not fall below the nameplate value - this simplifies precise system design and removes the risk of underestimating energy production, unlike series with symmetric tolerance (e.g. ±3%).

Reinforced mechanical build

Tempered glass and an anodized aluminum frame provide resistance to snow and wind loads typical of the Polish climate, which is relevant for pitched-roof mounts exposed to heavy winter loading.

Competitive efficiency vs. part of the segment

Efficiency of 17.45-18.6% places the series above the Selfa SV120M.3.2 module (17% at the same 310 Wp power), meaning a slightly smaller array footprint than this specific competitor at a comparable price point.

Established market presence since 2019

The series has been in production since 2019 and remains active (not discontinued), giving it several years of field track record and lower risk of early design flaws typical of newly launched product lines.

Trade-offs
No confirmed BNEF Tier-1 status

Rarlon PV Tech does not appear on BloombergNEF's Tier-1 list, meaning it lacks confirmed bankability (min. 6 projects financed on a non-recourse basis by 6 different banks within 2 years) - unlike Canadian Solar (KuBlack, BiKu), which regularly appears on that list. This can complicate financing for larger commercial installations.

Efficiency below top peers at the same power rating

At the identical 310 Wp power rating, Canadian Solar modules reach 18.4-18.7% efficiency, while this series tops out at 18.6% and its lower-power variants drop to just 17.45% - in practice the weaker variants of this series need more roof area than comparable KuBlack or BiKu modules.

Older PERC technology, no bifacial option

The series relies solely on monofacial PERC cells dating to 2019, with no dual-sided variant - Canadian Solar's competing BiKu series offers bifacial technology at the same 310 Wp power, which on light-colored surfaces (e.g. a white membrane roof) can add 5-10% extra yield unavailable in the Rarlon module.

Notes from the database
  • Module efficiency of 18.3% is 1.1pp below average for PERC 0-400W panels (median: 19.4%)
  • 180.8 W/m² power density is 13.7 W/m² below PERC 0-400W median (194.4 W/m²) - requires larger installation area
  • -0.39%/°C temperature coefficient - 0.03pp worse than PERC 0-400W median (-0.36%/°C), expect higher hot weather losses
  • Weight of 18.5 kg (2.0 kg below PERC 0-400W median of 20.5 kg) allows easier transport and roof mounting
  • In the top 94% for efficiency among all PERC panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 305 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 18.30 % Typical Segment median 19.00%
Vmpp · Impp 31.88 V · 9.57 A Operating point at max power
Voc · Isc 38.95 V · 10.03 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1684×1002×35 mm · 1.69 m² of roof
Weight 18.5 kg Typical Typical · median 19.0 kg
Cells 120 · PERC Polycrystalline
Coefficient Pmax -0.390 %/°C Weak bottom 15% of its segment
Coefficient Voc · Isc -0.290 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient

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 -0.360
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Rarlon PV Tech RL305HP-120 305 W 18.30% -0.390 18.5 kg You are here
LNSK-340M 340 W 20.08% -0.360 21.0 kg +35 W, cooler, +1.8 pp
CS3K-330P 330 W 19.90% -0.360 18.5 kg +25 W, cooler, +1.6 pp
CS3K-335MB-AG 335 W 19.90% -0.360 22.3 kg Cooler, heavier, +1.6 pp
LNSK-335M 335 W 19.78% -0.360 21.0 kg +30 W, cooler, +1.5 pp
CS3K-325P 325 W 19.60% -0.360 18.5 kg +20 W, cooler, +1.3 pp
LNSK-330M 330 W 19.49% -0.360 21.0 kg +25 W, cooler, +1.2 pp
CS3K-320P 320 W 19.30% -0.360 18.5 kg +15 W, cooler, +1.0 pp
RL290HP-120 290 W 17.45% -0.390 18.5 kg -15 W, -0.9 pp
RL295HP-120 295 W 17.75% -0.390 18.5 kg -10 W, -0.6 pp
RL300HP-120 300 W 18.05% -0.390 18.5 kg -0.2 pp
RL310HP-120 310 W 18.60% -0.390 18.5 kg +0.3 pp
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg +135 W, cooler, +4.6 pp
JT435SYk(B) 435 W 22.70% -0.240 23.0 kg +130 W, cooler, +4.4 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg +95 W, cooler, +4.3 pp
JT430SYk(B) 430 W 22.40% -0.240 23.0 kg +125 W, cooler, +4.1 pp
LEPV 400 400 W 22.31% -0.290 20.0 kg +95 W, cooler, +4.0 pp

Found 108 panels of the same or similar size to this one, within ±10 mm. See them here Found 218 panels of the same or similar size to this one, within ±25 mm. See them here Found 455 panels of the same or similar size to this one, within ±50 mm. See them here Found 799 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Do the Rarlon PV Tech RL290HP-310HP-120 panels handle partial shading from a chimney or nearby trees?
Yes, the RL290HP-310HP-120 series was specifically designed for real-world conditions that include partial shading. The 120-cell layout improves current management within the module and significantly reduces losses caused by partial obstruction. This is a key advantage on residential rooftops where chimneys, dormers, or nearby trees cast shade for a significant part of the day throughout the year.
What is PERC technology in the RL290HP-310HP-120 series, and is it worth paying for?
PERC (Passivated Emitter and Rear Cell) adds a passivation layer on the rear of each cell, allowing more photons to be converted into electricity. In the RL290HP-310HP-120 series this enables output up to 310 Wp within a compact 120-cell configuration. For a typical residential system it delivers higher energy yield per square meter compared to older standard BSF cells. PERC is the baseline technology here, not a premium add-on.
What does the positive power tolerance in the Rarlon RL290HP-310HP-120 series mean in practice?
Positive power tolerance means the module delivers at least its rated power — e.g., 310 Wp — and may slightly exceed it. For the system owner this ensures the installation is never underperforming its design specifications. In practice it enables more accurate annual energy yield estimates and means real-world output meets or exceeds the nameplate value rather than falling short of it.
Are the Rarlon PV Tech RL290HP-310HP-120 panels suitable for a pitched roof on a single-family home?
Yes, the RL290HP-310HP-120 series is a natural fit for residential prosumer installations on pitched roofs. The anodized aluminum frame is compatible with standard racking systems — rails and roof clamps — widely available in Poland. The modules withstand wind and snow loads thanks to tempered glass, which is especially important given Poland's climate conditions.
How well do the Rarlon RL290HP-310HP-120 panels resist wind, snow, and hail?
The RL290HP-310HP-120 series features tempered glass and an anodized aluminum frame engineered to handle mechanical loads typical of Polish weather — strong winds and accumulated snow. The tempered glass also provides standard hail impact protection for the underlying PERC cells. Exact allowable mechanical load ratings expressed in kg/m² should be verified in the manufacturer's datasheet.
Are the Rarlon RL290HP-310HP-120 panels compatible with popular inverters available in Poland?
Yes, the RL290HP-310HP-120 series is compatible with standard MPPT inverters widely available in Poland, such as SMA, Fronius, Huawei, and Growatt. When designing the system, verify the inverter's input voltage range against the module's Voc and Isc values from the datasheet and size the strings accordingly. The series does not use bifacial technology or proprietary connectors that would require dedicated hardware.
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