Skip to main content
Sharp GSD8K66H-740WT
Sharp Brand review

GSD8K66H-740WT

740 Wp HJT Bifacial 85%
ComparePV verdict

Efficiency leader, weak in heat

Rank 12 of 14,129
Compare panels Datasheet PDF
Power (Wp)
740
Strong · top 4%
Efficiency (%)
23.82
Strong · top 2%
Density (Wp/m²)
238.2
Strong · top 4%
Temp (%/°C)
-0.260
Weak · bottom 18%
Weight (kg)
39.0
Typical · median 38.3 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Sharp GSD8K66H series [710-740W] are modules designed to maximize energy output from every square meter - particularly in situations where high power output from a single panel and rapid string construction are crucial. The use of bifacial construction in a glass-glass configuration allows for energy recovery from both sides, significantly improving production in installations on reflective surfaces, flat roofs, and ground-mounted systems. The HJT technology with half-cut cells helps minimize losses and maintain stable performance under varying conditions, while also enhancing long-term material fatigue resistance. Another key feature is low sensitivity to high temperatures, allowing the module to lose less power on hot days compared to many popular solutions. This is further enhanced by high environmental resistance and a robust design for commercial projects. This makes it a good choice for PV farms, large industrial rooftops, and installations where high output and predictable performance are the priority.

Ranking

222 panels in the segment HJT 700-750 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.82% 23.02% Strong · top 2% 447
Power density 238.2 230.2 Strong · top 4% 460
Temperature coefficient -0.260 -0.240 Weak · bottom 18% 515
Weight per kWp 52.7 53.6 Typical 6,398
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

2 positive · 1 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

Hot climates.

Strengths
23.82% module efficiency

Top 2% of the HJT 700-750 W segment, against a median of 23.02%. Ranked 447th in the whole database.

238.2 watts per square metre

Top 4% of the HJT 700-750 W segment, against a median of 230.2. Ranked 460th in the whole database.

Watch-outs
-0.260 %/°C temperature coefficient

Bottom 18% of the HJT 700-750 W segment, against a median of -0.240.

Notes from the database
  • 23.8% module efficiency - 0.8pp better than the HJT 700-750W median of 23.0%
  • At 238.2 W/m² power density, this panel generates 8.0 W/m² more per unit area than HJT 700-750W median (230.2 W/m²)
  • Temperature coefficient of -0.26%/°C is 0.02pp worse than HJT 700-750W median (-0.24%/°C) - higher losses in summer heat
  • Bifaciality factor of 85% can add 4-13% extra yield with reflective mounting surface
  • In the top 3% for efficiency among all HJT panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 740 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.82 % Strong Segment median 23.02%
Vmpp · Impp 43.80 V · 16.91 A Operating point at max power
Voc · Isc 51.70 V · 17.76 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 39.0 kg Typical Typical · median 38.3 kg
Cells 132 · HJT Monocrystalline
Bifaciality 85 % Rear output as a share of front
Coefficient Pmax -0.260 %/°C Weak bottom 18% of its segment
Coefficient Voc · Isc -0.240 · 0.040 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 25 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 88.8 % Equals 657 W guaranteed
Degradation 1.00 → 0.35 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Sharp in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 740 Wp appear here. The rest cover the whole series.

IV-Curve (Cell Temperature Variation, Incident Irrad. = 1000 W/m²) IV-Curve (Cell Temperature Variation, Incident Irrad. = 1000 W/m²) 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 -0.240
-
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
Sharp GSD8K66H-740WT 740 W 23.82% -0.260 39.0 kg You are here
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg -40 W, lighter, +1.2 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg -45 W, lighter, +1.1 pp
AIKO-A690-MAE78Dw 690 W 24.70% -0.260 34.5 kg -50 W, lighter, +0.9 pp
AIKO-A790-GRH78Dw 790 W 24.60% -0.260 39.8 kg +50 W, +0.8 pp
TSM-NEG21C.20Q-760 760 W 24.50% -0.260 38.3 kg +20 W, +0.7 pp
AIKO-A785-GRH78Dw 785 W 24.40% -0.260 39.8 kg +45 W, +0.6 pp
GK-4-78HGBD-780M 780 W 24.30% -0.260 38.7 kg +40 W, +0.5 pp
AIKO-A780-GRH78Dw 780 W 24.30% -0.260 39.8 kg +40 W, +0.5 pp
JT755SLk(B) 755 W 24.30% -0.240 36.4 kg Cooler, lighter, +0.5 pp
TSM-NEG21C.20Q-755 755 W 24.30% -0.260 38.3 kg +15 W, +0.5 pp
GSD8K66H-710WT 710 W 22.86% -0.260 39.0 kg -30 W, -1.0 pp
GSD8K66H-715WT 715 W 23.02% -0.260 39.0 kg -25 W, -0.8 pp
GSD8K66H-720WT 720 W 23.18% -0.260 39.0 kg -20 W, -0.6 pp
GSD8K66H-725WT 725 W 23.34% -0.260 39.0 kg -15 W, -0.5 pp
GSD8K66H-730WT 730 W 23.50% -0.260 39.0 kg -10 W, -0.3 pp
GSD8K66H-735WT 735 W 23.66% -0.260 39.0 kg Very close match
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +65 W, +1.3 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 GSD8K66H [710–740W] series

6 answered

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

What warranty does the Sharp GSD8K66H come with and what does it cover?
Sharp backs the GSD8K66H series with a 25-year product warranty covering manufacturing defects and materials, plus a 30-year power output warranty. A 25-year product warranty exceeds the current market standard and reflects the manufacturer's confidence in the durability of the glass-glass HJT construction. The power warranty ensures predictable energy yield throughout the full service life of the installation.
Is the Sharp GSD8K66H 740W panel suitable for utility-scale solar farms and large commercial rooftops?
Yes, the GSD8K66H series is designed primarily for commercial and ground-mounted installations. Up to 740 W per module enables longer strings with fewer panels and lower BoS costs. The bifacial glass-glass design further improves yield on flat rooftops and ground-mounted arrays where reflected light from a bright surface reaches the rear side of the module.
What is HJT technology in the Sharp GSD8K66H panels and is it worth the premium?
HJT (Heterojunction Technology) combines a crystalline silicon wafer with thin amorphous silicon layers on both sides. In practice this delivers higher conversion efficiency and a very low temperature coefficient, meaning smaller power losses on hot days compared to standard PERC or TOPCon modules. HJT modules also tend to show lower long-term degradation rates, improving LCOE over the system lifetime.
Do Sharp GSD8K66H panels lose significant power during hot summer days?
The GSD8K66H series features low temperature sensitivity, a hallmark of HJT technology. A typical HJT temperature coefficient is around -0.24 to -0.26%/°C (Pmax), compared to approximately -0.35%/°C for standard PERC modules. In real-world terms this means meaningfully higher output on hot sunny days versus older-technology modules.
What does bifacial mean in the Sharp GSD8K66H and when does it make the most sense?
A bifacial module has active cells on both sides and can harvest albedo light reflected from the ground or rooftop surface. The greatest gains come from ground-mounted arrays, flat rooftops with light-colored membranes or gravel, and elevated racking over bright surfaces. Depending on the albedo coefficient of the surface, rear-side generation can add anywhere from a few percent up to over 20% of additional energy output.
Is Sharp a reliable solar panel manufacturer and is the GSD8K66H still available?
Sharp is a Japanese electronics and photovoltaics company with over 60 years of industry history and is classified as a Tier 1 manufacturer by independent rating agencies. The GSD8K66H series is currently in active production and has not been discontinued. Tier 1 status means the manufacturer meets strict financial and quality criteria, which supports the long-term viability of the warranty.
Add to compare