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Waaree Brand review

WS-255

255 Wp Polycrystalline
ComparePV verdict

Middle of its segment, modest efficiency

Rank 13,711 of 14,005
Compare panels Datasheet PDF
Power (Wp)
255
Weak · bottom 23%
Efficiency (%)
15.71
Weak · bottom 17%
Density (Wp/m²)
157.1
Weak · bottom 18%
Temp (%/°C)
-0.386
Typical · median -0.360
Weight (kg)
18.5
Weak · bottom 21%
Warranty (yrs)
25
Typical · median 25 yrs

The Waaree ADITYA SERIES is an advanced technological solution designed to maximize energy yields in diverse climatic conditions. These panels use high-efficiency silicon cells, which are characterized by an excellent response to diffused light, making them an ideal choice for the Polish market. Thanks to the use of a reinforced frame and low-iron tempered glass, the modules demonstrate high mechanical resistance to extreme loads, such as heavy snow or gusty winds. A key differentiator of this series is the PID-limiting technology, which directly translates into a longer installation lifespan and slower power degradation over time. The ADITYA SERIES effectively solves the problem of energy losses resulting from high temperatures, offering a favorable temperature coefficient, which stabilizes electricity production on hot days. It is a product dedicated to both demanding prosumers and commercial investors looking for a compromise between innovation and solid build quality. They are distinguished from the competition by a rigorous quality control process, ensuring the repeatability of the parameters of each module. By choosing this series, the user gains the assurance of failure-free system operation and a high aesthetic finish that goes hand in hand with the modern design of contemporary photovoltaics.

Ranking

966 panels in the 155-355 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 15.71% 17.52% Weak · bottom 17% 13,684
Power density 157.1 175.2 Weak · bottom 18% 13,673
Temperature coefficient -0.386 -0.360 Typical 13,485
Weight per kWp 72.5 64.7 Weak · bottom 21% 13,520
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 · 3 caution
Best for

Residential and commercial.

Not ideal for

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

Watch-outs
15.71% module efficiency

Bottom 17% of the 155-355 W band, against a median of 17.52%.

157.1 watts per square metre

Bottom 18% of the 155-355 W band, against a median of 175.2.

72.5 kg per kWp

Bottom 21% of the 155-355 W band, against a median of 64.7.

Notes from the database
  • Efficiency of 15.7% is 6.1pp below the database median (21.8%)
  • At 157.1 W/m², this panel generates 61.0 W/m² less per unit area than database median (218.1 W/m²)
  • At -0.39%/°C, loses 0.09pp more power per degree than database median (-0.30%/°C)
  • At 18.5 kg, this panel is 8.0 kg lighter than database median (26.5 kg) - easier handling during installation
  • In the top 98% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 255 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 15.71 % Weak Segment median 17.52%
Vmpp · Impp 31.30 V · 8.15 A Operating point at max power
Voc · Isc 37.50 V · 9.00 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1640×990×40 mm · 1.62 m² of roof
Weight 18.5 kg Weak Weak · bottom 21%
Cells 60 Polycrystalline
Coefficient Pmax -0.386 %/°C Typical median -0.360 of its segment
Coefficient Voc · Isc -0.278 · 0.051 %/°C
NOCT 46 °C At 800 W/m², 20 °C ambient
Product warranty 10 years Hardware defects only
Performance warranty 25 years Typical median 25 yrs · median 25 yrs
End-of-warranty output 80.0 % Equals 194 W guaranteed

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
-0.386 %/°C against a segment median of -0.360
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Waaree WS-255 255 W 15.71% -0.386 18.5 kg You are here
CS3K-305P-AG 305 W 18.40% -0.360 22.5 kg +50 W, +2.7 pp, +5 yr warranty
RL305HP-120 305 W 18.30% -0.390 18.5 kg +50 W, +2.6 pp
WS-295 295 W 18.17% -0.386 18.5 kg +40 W, +2.5 pp
CS3K-305PB-AG 305 W 18.10% -0.360 22.3 kg +50 W, +2.4 pp, +5 yr warranty
CS3K-300P-AG 300 W 18.10% -0.360 22.5 kg +45 W, +2.4 pp, +5 yr warranty
RL300HP-120 300 W 18.05% -0.390 18.5 kg +45 W, +2.3 pp
LNSK-305P 305 W 18.01% -0.360 21.0 kg +50 W, cooler, +2.3 pp
MYP3060-300 300 W 18.01% -0.370 19.0 kg +45 W, cooler, +2.3 pp
WS-250 250 W 15.40% -0.386 18.5 kg -0.3 pp
WS-260 260 W 16.01% -0.386 18.5 kg +0.3 pp
WS-265 265 W 16.32% -0.386 18.5 kg +10 W, +0.6 pp
WS-270 270 W 16.63% -0.386 18.5 kg +15 W, +0.9 pp
WS-275 275 W 16.94% -0.386 18.5 kg +20 W, +1.2 pp
WS-280 280 W 17.25% -0.386 18.5 kg +25 W, +1.5 pp
WS-285 285 W 17.55% -0.386 18.5 kg +30 W, +1.8 pp
WS-290 290 W 17.86% -0.386 18.5 kg +35 W, +2.1 pp
SPR-MAX3-400-COM 400 W 22.60% -0.270 19.0 kg +145 W, +6.9 pp, +15 yr warranty

Found 182 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 379 panels of the same or similar size to this one, within ±50 mm. See them here Found 472 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Can Waaree ADITYA SERIES panels withstand heavy snow and strong wind loads in Poland?
Yes, ADITYA SERIES modules feature a reinforced frame and low-iron tempered glass, allowing them to withstand high mechanical loads — typically up to 5400 Pa for snow and 2400 Pa for wind. These figures significantly exceed average Polish climate conditions, making the panels suitable for both pitched and flat roofs, even in areas with heavy snowfall.
What is PID mitigation technology in Waaree ADITYA panels and is it actually useful?
PID (Potential Induced Degradation) is a gradual power loss caused by voltage potential differences between the cell and frame, worsened by high humidity and temperature. The PID-mitigation technology used in ADITYA SERIES reduces this effect, so the panel loses efficiency more slowly over its lifetime. In practice, this means more stable energy yields throughout the 25-year power warranty period.
What warranty do Waaree ADITYA SERIES 400 Wp panels come with?
The manufacturer provides a 10-year product warranty covering material and workmanship defects, plus a 25-year power output warranty. This means the panel should still deliver the guaranteed performance level specified in the datasheet after 25 years, giving investors a predictable return on investment across a full generation, or even two, of solar system operation.
Do Waaree ADITYA SERIES panels lose power on hot days?
ADITYA SERIES uses PERC cells with a favorable temperature coefficient, which limits power loss at high module operating temperatures. As a result, the panels maintain more stable current output on hot, sunny days compared to older cell technologies — an important factor for roof installations with poor ventilation, where modules tend to heat up more.
Is Waaree ADITYA SERIES a bifacial panel?
No, ADITYA SERIES is a mono-facial panel line built with high-efficiency PERC silicon cells rated up to 400 Wp. If you're looking for additional energy yield from reflected light on the rear side of the module, consider a different bifacial series from Waaree — this line instead focuses on maximizing efficiency and durability in a standard single-sided design.
Is Waaree a reputable solar panel manufacturer, and where is it based?
Waaree is an India-based Tier 1 manufacturer, meaning it operates its own production lines, maintains stable financials, and is regularly audited for project bankability. The ADITYA SERIES undergoes strict quality control at every production stage, ensuring consistent module parameters — an important factor for larger installations where uniform panel performance matters.
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