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Waaree Bi-27-390
Waaree Brand review

Bi-27-390

390 Wp PERC Bifacial 3000%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 12,847 of 14,005
Compare panels Datasheet PDF
Power (Wp)
390
Typical for its class
Efficiency (%)
19.05
Weak · bottom 15%
Density (Wp/m²)
190.5
Weak · bottom 15%
Temp (%/°C)
-0.370
Weak · bottom 16%
Weight (kg)
29.0
Weak · 7.6 kg above median
Warranty (yrs)
25
Typical · median 25 yrs

The Waaree AHNAY series are bifacial glass-glass modules designed to genuinely increase energy yield from the same installation surface - especially on sites where the rear side of the module also generates electricity. The use of dual-glass construction enhances weather resistance and reduces the risk of micro-cracks, which is crucial for long-term operation. The AHNAY variants are available in both Mono PERC and N-type TOPCon technologies, making it easier to select the right module for project requirements and performance profiles (e.g., higher parameter stability over time). An additional advantage is resistance to PID and optimized heat dissipation thanks to split junction box solutions, which help limit the risk of hotspots and performance degradation. This is the series for investors building installations on flat roofs, PV farms, and commercial sites, where low energy costs and predictable power generation even under diffuse light and partial shading matter.

Ranking

579 panels in the segment PERC 350-400 W
Metric This panel Median Position in segment Overall rank
Module efficiency 19.05% 19.90% Weak · bottom 15% 12,930
Power density 190.5 199.0 Weak · bottom 15% 12,919
Temperature coefficient -0.370 -0.350 Weak · bottom 16% 13,081
Weight per kWp 74.4 55.8 Weak · bottom 2% 13,589
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

Commercial, utility-scale and shaded-installations.

Not ideal for

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

Watch-outs
74.4 kg per kWp

Bottom 2% of the PERC 350-400 W segment, against a median of 55.8. Ranked 13,589th in the whole database.

190.5 watts per square metre

Bottom 15% of the PERC 350-400 W segment, against a median of 199.0.

19.05% module efficiency

Bottom 15% of the PERC 350-400 W segment, against a median of 19.90%.

Notes from the database
  • Efficiency of 19.1% matches the PERC 0-400W median
  • Power density of 190.5 W/m² is 3.9 W/m² below PERC 0-400W median (194.4 W/m²) - needs more roof space
  • Temperature coefficient of -0.37%/°C matches the PERC 0-400W median
  • At 29.0 kg (8.5 kg above PERC 0-400W median of 20.5 kg), requires checking roof load capacity
  • #12930 for efficiency, #13081 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 390 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 19.05 % Weak Segment median 19.90%
Vmpp · Impp 39.56 V · 9.88 A Operating point at max power
Voc · Isc 48.76 V · 10.29 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2029×1009×40 mm · 2.05 m² of roof
Weight 29.0 kg Weak Weak · 7.6 kg above median
Cells 144 · PERC Monocrystalline
Bifaciality 3000 % Rear output as a share of front
Coefficient Pmax -0.370 %/°C Weak bottom 16% of its segment
Coefficient Voc · Isc -0.270 · 0.050 %/°C
NOCT 43 °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 81.9 % Equals 307 W guaranteed
Degradation 2.50 → 0.65 % 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
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.370 %/°C against a segment median of -0.350
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Waaree Bi-27-390 390 W 19.05% -0.370 29.0 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg Cooler, lighter, +4.0 pp
GKA210M340W 340 W 23.00% - 16.2 kg -50 W, lighter, +3.9 pp
GKA210M360W 360 W 23.00% - 16.2 kg Lighter, +3.9 pp, +5 yr warranty
GKA210M380W (1/4*4*38) 380 W 23.00% - 17.1 kg Lighter, +3.9 pp, +5 yr warranty
GKA210M400W (1/2*4*20) 400 W 23.00% - 18.0 kg Lighter, +3.9 pp, +5 yr warranty
GKA210M400W (1/4*4*40) 400 W 23.00% - 18.0 kg Lighter, +3.9 pp, +5 yr warranty
GKA210M380W (1/2*4*19) 380 W 23.00% - 17.1 kg Lighter, +3.9 pp, +5 yr warranty
JT440SYK(B) 440 W 22.90% -0.240 23.0 kg Cooler, lighter, +3.8 pp
Bi-27-380 380 W 18.56% -0.370 29.0 kg -10 W, -0.5 pp
Bi-17-380 380 W 18.60% -0.370 25.5 kg -10 W, lighter, -0.4 pp
Bi-27-385 385 W 18.81% -0.370 29.0 kg -0.2 pp
Bi-17-385 385 W 18.84% -0.370 25.5 kg Lighter, -0.2 pp
Bi-17-390 390 W 19.09% -0.370 25.5 kg Lighter
Bi-25-395 395 W 19.29% -0.370 28.0 kg Lighter, +0.2 pp
Bi-17-395 395 W 19.33% -0.370 25.5 kg Lighter, +0.3 pp
MS480NC-HJTPBFT 480 W 22.10% -0.260 23.0 kg +90 W, cooler, +3.1 pp

Found 31 panels of the same or similar size to this one, within ±10 mm. See them here Found 139 panels of the same or similar size to this one, within ±25 mm. See them here Found 296 panels of the same or similar size to this one, within ±50 mm. See them here Found 789 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the difference between Waaree AHNAY Mono PERC and N-type TOPCon panel variants?
Both technologies in the AHNAY series share the same dual-glass bifacial construction, but differ mainly in long-term stability and degradation rate. TOPCon modules have a lower annual degradation rate and higher output efficiency than standard PERC, resulting in higher energy yield over the system's lifetime. PERC remains a more budget-friendly option, well suited for cost-sensitive projects.
What is the maximum power output and efficiency of the Waaree AHNAY panel?
Top variants in the AHNAY series reach up to 665 Wp with 132 half-cut cells, and module efficiency reaches around 21.3 percent. This is a high value for dual-glass bifacial modules, allowing more energy to be generated from the same roof or ground-mount area compared to older, less efficient series.
What warranty does Waaree offer on the AHNAY series, and what does it cover?
The manufacturer provides a 12-year product warranty and a 30-year linear power output warranty. This means protection against factory defects for over a decade, plus a predictable, guaranteed power degradation curve over three decades of operation, which simplifies ROI planning for commercial installations and PV farms.
Do Waaree AHNAY bifacial panels actually increase energy production compared to standard modules?
Yes, the dual-glass construction lets the rear side of the module capture light reflected from the ground, roof, or surroundings, boosting total energy yield, especially over bright, reflective surfaces like gravel or white roofing. The actual gain depends on mounting height and ground albedo, but in practice AHNAY installations outperform comparable monofacial panels of the same surface area.
Are Waaree AHNAY modules PID-resistant and suitable for large-scale PV farms?
Yes, the AHNAY series has certified resistance to potential-induced degradation (PID), which matters in large installations with long strings and high system voltage. A split junction box design also improves heat dissipation and reduces hotspot risk, making this series well suited for PV farms and large commercial rooftop installations.
Does Waaree offer the quality assurance typical of Tier 1 solar manufacturers?
Yes, Waaree is an India-based Tier 1 manufacturer, meaning it has financial stability, its own production capacity, and a documented track record of supplying modules to large commercial and industrial projects worldwide. Tier 1 status increases confidence in the long-term warranty, since the manufacturer has the real capacity to honor it throughout the full 30-year power warranty period.
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