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Vikram Solar Brand review

ENERSURGE VSMDH.66.665.05

665 Wp Back Contact Bifacial 70%
ComparePV verdict

Efficiency leader, no clear weak spot

Rank 652 of 14,129
Compare panels Datasheet PDF
Power (Wp)
665
Typical for its class
Efficiency (%)
24.62
Strong · top 21%
Density (Wp/m²)
246.2
Typical · median 244.3
Temp (%/°C)
-0.260
Typical · median -0.260
Weight (kg)
33.4
Typical · median 32.8 kg
Warranty (yrs)
30
Typical · median 30 yrs

The ENERSURGE series from Vikram Solar is a lineup of photovoltaic modules built on N-type back contact technology, where the entire interconnection grid is moved to the rear side of the cell. This leaves the front surface completely free of grids and busbars, delivering maximum light absorption and a higher short-circuit current, which translates into a real gain in energy yield, especially under diffuse irradiance conditions. The design, based on G12R half-cut cells and full backside soldering, reduces mechanical stress and the risk of microcracks, resulting in improved longevity throughout the module's service life. The series also stands out for its zero negative power tolerance, thanks to current binning that minimizes mismatch losses within a string. The bifacial, glass-glass construction additionally captures light reflected from the ground, boosting total energy production. The uniform, black appearance with no visible grid lines makes these panels an aesthetic choice for both residential rooftop installations and large-scale utility solar farms. ENERSURGE is aimed at investors looking for high reliability, a lower LCOE, and a long-term 30-year linear performance warranty.

Ranking

88 panels in the segment Back Contact 650-700 W
Metric This panel Median Position in segment Overall rank
Module efficiency 24.62% 24.40% Strong · top 21% 47
Power density 246.2 244.3 Typical 47
Temperature coefficient -0.260 -0.260 Typical 515
Weight per kWp 50.2 49.8 Typical 3,692
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 0 caution
Best for

Small roofs that need every watt.

Strengths
24.62% module efficiency

Top 21% of the Back Contact 650-700 W segment, against a median of 24.40%.

Notes from the database
  • At 24.6% efficiency, this panel is on par with typical Back Contact 650-700W modules
  • At 246.2 W/m² power density, roof space requirements are typical for Back Contact 650-700W panels
  • Temperature coefficient of -0.26%/°C matches the Back Contact 650-700W median
  • Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof
  • #47 for efficiency, #515 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 665 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 24.62 % Strong Segment median 24.40%
Vmpp · Impp 42.17 V · 15.77 A Operating point at max power
Voc · Isc 50.00 V · 16.75 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2382×1134×30 mm · 2.70 m² of roof
Weight 33.4 kg Typical Typical · median 32.8 kg
Cells 132 · Back Contact Monocrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.260 %/°C Typical median -0.260 of its segment
Coefficient Voc · Isc -0.220 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 88.8 % Equals 591 W guaranteed
Degradation 1.00 → 0.35 % 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 665 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
-
With bifacial gain
-

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

Heat losses
-0.260 %/°C against a segment median of -0.260
-
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
Vikram Solar ENERSURGE VSMDH.66.665.05 665 W 24.62% -0.260 33.4 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg -15 W, lighter, +0.6 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +15 W, lighter, +0.6 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +10 W, lighter, +0.4 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg -20 W, lighter, +0.4 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +35 W, heavier, +0.4 pp
WST-675BKX72-A2 675 W 25.00% -0.260 32.1 kg +10 W, lighter, +0.4 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +30 W, heavier, +0.3 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Lighter
HYPERSOL VSMDH.66.610.05 610 W 22.58% -0.280 32.1 kg -55 W, hotter, -2.0 pp
HYPERSOL VSMDH.66.615.05 615 W 22.77% -0.290 32.1 kg -50 W, hotter, -1.9 pp
HYPERSOL VSMDH.66.620.05 620 W 22.95% -0.280 33.4 kg -45 W, hotter, -1.7 pp
HYPERSOL VSMDH.66.625.05 625 W 23.14% -0.280 33.4 kg -40 W, hotter, -1.5 pp
HYPERSOL VSMDH.66.630.05 630 W 23.32% -0.280 33.4 kg -35 W, hotter, -1.3 pp
HYPERSOL VSMDH.66.635.05 635 W 23.51% -0.280 33.4 kg -30 W, hotter, -1.1 pp
HYPERSOL VSMDH.66.640.05 640 W 23.69% -0.280 33.4 kg -25 W, hotter, -0.9 pp
ENERSURGE VSMDH.66.645.05 645 W 23.88% -0.260 33.4 kg -20 W, -0.7 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg Lighter

Found 1144 panels of the same or similar size to this one, within ±10 mm. See them here Found 1150 panels of the same or similar size to this one, within ±25 mm. See them here Found 1261 panels of the same or similar size to this one, within ±50 mm. See them here Found 1942 panels of the same or similar size to this one, within ±100 mm. See them here

About the ENERSURGE series

6 answered

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

What is Back Contact technology in ENERSURGE panels and how does it differ from standard modules?
In Back Contact technology, the entire metallization grid and busbars are moved to the rear side of the cell, leaving the front surface completely free of shading caused by wiring. This results in higher short-circuit current and better light absorption, especially under diffuse radiation, compared to conventional modules with visible front-side busbars.
What is the maximum power output of an ENERSURGE panel and who is it suitable for?
ENERSURGE modules reach a maximum power of up to 670 Wp, making them an attractive solution for both large-scale solar farms and residential rooftop installations that require high power density on limited roof space.
Are ENERSURGE panels bifacial, and how much extra energy can they generate?
Yes, the ENERSURGE series uses a bifacial glass-glass design. The rear side of the cell captures reflected radiation from the ground or surrounding surfaces, further increasing total energy yield compared to standard monofacial panels, particularly on elevated mounting structures or ground-mounted solar farms.
What warranty does Vikram Solar offer on ENERSURGE panels?
ENERSURGE panels come with a 12-year product warranty and a 30-year linear power performance warranty. This long coverage period reflects the use of Back Contact technology and G12R half-cells with full rear-side soldering, which reduces mechanical stress and the risk of microcracks throughout the panel's service life.
What does zero negative power tolerance mean for ENERSURGE panels and why does it matter for system design?
Zero negative power tolerance, achieved through current binning, means the actual delivered power of a panel never falls below its rated label value. For installers and investors, this guarantees minimal mismatch losses within a string of modules, resulting in a higher and more predictable energy yield from the entire PV system.
Is Vikram Solar, the manufacturer of ENERSURGE, a reliable choice for investors?
Vikram Solar is a Tier 1 manufacturer headquartered in India, with years of experience supplying modules for large commercial projects and rooftop installations worldwide. Tier 1 status indicates financial stability and bankability, making it easier to secure financing for projects based on this module series.
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