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Vikram Solar Brand review

SOMERA VSMH.66.660.05

660 Wp PERC
ComparePV verdict

Middle of its segment, weak in heat

Rank 3,752 of 14,129
Compare panels Datasheet PDF
Power (Wp)
660
Typical for its class
Efficiency (%)
21.25
Typical · median 21.25%
Density (Wp/m²)
212.5
Typical · median 212.5
Temp (%/°C)
-0.350
Weak · bottom 10%
Weight (kg)
33.6
Typical · median 34.5 kg
Warranty (yrs)
27
Typical · median 30 yrs

The Somera VSMH.66.AAA.05 series is a monofacial G12-class PV module lineup designed for investors who expect stable energy output even in demanding environmental conditions. The panel uses G12 half-cut Mono PERC cells arranged in a 132 half-cell layout, which reduces resistive losses and delivers a more even current distribution across the module. A key advantage of this series is its enhanced corrosion resistance - the module maintains performance even when exposed to sand dust, concentrated ammonia, or salt mist, making it a solid choice for agricultural, industrial, and coastal installations. The manufacturer applies a zero negative power tolerance with a positive range of up to 4.99 Wp, combined with precise Imp binning that minimizes mismatch losses across module strings. The panel is manufactured on a fully automated production line with multi-stage EL inspection, resulting in a lower rate of factory defects. PVEL Top Performer certification confirms strong long-term reliability, while lower BoS costs translate into a reduced LCOE for the entire installation. This is a solution for anyone seeking durability and predictable ROI in challenging site conditions.

Ranking

320 panels in the segment PERC 650-700 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.25% 21.25% Typical 8,973
Power density 212.5 212.5 Typical 9,028
Temperature coefficient -0.350 -0.340 Weak · bottom 10% 10,489
Weight per kWp 50.9 52.3 Typical 4,290
Performance warranty 27 yrs 30 yrs Typical 9,781
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 1 caution
Best for

Utility-scale, commercial and shaded-installations.

Not ideal for

Hot climates.

Watch-outs
-0.350 %/°C temperature coefficient

Bottom 10% of the PERC 650-700 W segment, against a median of -0.340.

Notes from the database
  • At 21.2% efficiency, this panel is on par with typical PERC 650-700W modules
  • At 212.5 W/m² power density, roof space requirements are typical for PERC 650-700W panels
  • Temperature coefficient of -0.35%/°C matches the PERC 650-700W median
  • #8973 for efficiency, #10489 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 660 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.25 % Typical Segment median 21.25%
Vmpp · Impp 38.50 V · 17.16 A Operating point at max power
Voc · Isc 46.10 V · 17.99 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×35 mm · 3.11 m² of roof
Weight 33.6 kg Typical Typical · median 34.5 kg
Cells 132 · PERC Monocrystalline
Coefficient Pmax -0.350 %/°C Weak bottom 10% of its segment
Coefficient Voc · Isc -0.270 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 27 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 83.7 % Equals 542 W guaranteed
Degradation 2.00 → 0.55 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Vikram Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 660 Wp appear here. The rest cover the whole series.

Typical I-V Curves Typical I-V Curves Whole series Performance Warranty Performance Warranty Whole series

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
-0.350 %/°C against a segment median of -0.340
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Vikram Solar SOMERA VSMH.66.660.05 660 W 21.25% -0.350 33.6 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +3.9 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, lighter, +3.9 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, lighter, +3.8 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +3.8 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +40 W, cooler, +3.8 pp
WST-675BKX72-A2 675 W 25.00% -0.260 32.1 kg Cooler, +3.8 pp, +3 yr warranty
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +35 W, cooler, +3.6 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +3.6 pp
PARADEA VSMDH.66.AAA.05-655 655 W 21.09% -0.350 39.5 kg Heavier, +3 yr warranty
PARADEA VSMDH.66.AAA.05-665 665 W 21.41% -0.350 39.5 kg Heavier, +3 yr warranty
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +145 W, cooler, +3.9 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +140 W, cooler, +3.6 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +135 W, cooler, +3.6 pp
AIKO-A790-GRH78Dw 790 W 24.60% -0.260 39.8 kg +130 W, cooler, +3.4 pp
TSM-NEG21C.20Q-760 760 W 24.50% -0.260 38.3 kg +100 W, cooler, +3.2 pp
AIKO-A785-GRH78Dw 785 W 24.40% -0.260 39.8 kg +125 W, cooler, +3.1 pp

Found 1393 panels of the same or similar size to this one, within ±10 mm. See them here Found 1403 panels of the same or similar size to this one, within ±25 mm. See them here Found 1403 panels of the same or similar size to this one, within ±50 mm. See them here Found 1435 panels of the same or similar size to this one, within ±100 mm. See them here

About the Somera VSMH.66.AAA.05 series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

Is the Vikram Solar Somera VSMH.66.AAA.05 series still available for purchase?
No, the Somera VSMH.66.AAA.05 series has been discontinued. Units may still be found in distributor warehouses or as end-of-series stock, but Vikram Solar has replaced this line with newer models. Buyers interested in this series should check availability with local suppliers, as remaining inventory may sell out quickly.
What warranty comes with the Somera VSMH.66.AAA.05 panels?
The panels come with a 12-year product warranty and a 27-year linear power warranty. This covers both manufacturing defects and excessive performance degradation over time. This warranty length matches the standard offered by tier-1 manufacturers and gives investors predictable long-term returns on their solar installation.
How do the half-cut Mono PERC cells in the Somera VSMH.66.AAA.05 differ from full-size cells?
Using 132 G12 half-cut Mono PERC cells instead of full-size cells reduces resistive losses and results in a more even current distribution across the module. Splitting each cell in half lowers the current flowing through each segment, which reduces thermal losses and improves efficiency, especially under partial shading conditions.
Are the Somera VSMH.66.AAA.05 panels suitable for coastal or agricultural installations?
Yes, this is one of the series' key advantages. The modules feature enhanced corrosion resistance and maintain their performance parameters even under exposure to salt mist, sand dust, or concentrated ammonia. This makes them well-suited for coastal installations, agricultural farms, and industrial sites with aggressive environmental conditions.
What is the maximum power output of the Somera VSMH.66.AAA.05 panels?
Panels in this series reach a maximum power output of up to 680 Wp. The manufacturer applies zero negative power tolerance with a positive range of up to 4.99 Wp, meaning a purchased module will never fall below its rated power and often performs slightly above the label rating.
Is Vikram Solar a tier-1 manufacturer, and where is the company based?
Yes, Vikram Solar is classified as a tier-1 manufacturer, reflecting its financial stability and extensive experience in PV module production. The company is headquartered in India and operates fully automated production lines with multi-stage EL inspection, resulting in a low rate of factory defects and earning a PVEL Top Performer certification for long-term reliability.
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