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HD Solar HD-N-G12-635
HD Solar Brand review

HD-N-G12-635

635 Wp TOPCon Bifacial 80%
ComparePV verdict

Space saver, weak in heat

Rank 1,462 of 14,005
Compare panels Datasheet PDF
Power (Wp)
635
Strong · top 16%
Efficiency (%)
23.50
Strong · top 10%
Density (Wp/m²)
235.1
Strong · top 9%
Temp (%/°C)
-0.300
Weak · bottom 19%
Weight (kg)
33.3
Typical · median 32.7 kg
Warranty (yrs)
30
Typical · median 30 yrs

The HD Solar HD-N-G12 132 half-cell series utilizes monocrystalline N-type TOPCon cells, designed to maximize energy yield under real-world operating conditions. The use of a 132 half-cell arrangement minimizes losses due to microcracks and reduces the risk of power drops in partially shaded conditions - which is particularly important on roofs with skylights, chimneys, or installations near trees. The bifacial design further allows for the utilization of reflected light from the ground, improving production, especially on bright roofs and in PV farms. A key advantage of this series is its stable performance at high temperatures, which translates to more predictable results in the summer. The series is also complemented by a long product warranty, which supports investment security. HD-N-G12 132 half-cell is a good choice for companies, agriculture, and large ground-mounted installations where high power density, reliability, and lower system cost per watt are important.

Ranking

1,086 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.50% 22.80% Strong · top 10% 716
Power density 235.1 227.7 Strong · top 9% 741
Temperature coefficient -0.300 -0.290 Weak · bottom 19% 6,093
Weight per kWp 52.4 53.1 Typical 5,977
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

7 positive · 2 caution
Best for

Commercial, utility-scale, shaded-installations and hot-climate.

Not ideal for

Hot climates.

Strengths
235.1 watts per square metre

Top 9% of the TOPCon 600-650 W segment, against a median of 227.7. Ranked 741st in the whole database.

23.50% module efficiency

Top 10% of the TOPCon 600-650 W segment, against a median of 22.80%. Ranked 716th in the whole database.

Watch-outs
-0.300 %/°C temperature coefficient

Bottom 19% of the TOPCon 600-650 W segment, against a median of -0.290.

What owners get
Module efficiency up to 23.5%

The top of the series (23.5% at 635 Wp) matches the LONGi Hi-MO X10 Explorer (23.5%) directly and is only 0.01 percentage points below the Sunpro TOPCon 210R BIFACIAL (23.51%), placing the HD-N-G12 132 firmly among the leaders in its comparable power segment.

Low degradation with N-type TOPCon cells

N-type TOPCon cells exhibit resistance to LID and LeTID and annual degradation of ≤0.4%, whereas PERC modules degrade at 0.6–0.8%/year. Over a 30-year installation lifetime, this translates into several percentage points of genuinely higher cumulative energy yield.

30-year power output warranty

The manufacturer provides a 30-year linear power warranty — longer than the Talesun TM7G78M (BIPRO), which carries a standard 25-year term. For externally financed utility-scale PV projects, a longer warranty horizon directly reduces investment risk.

Bifacial design + 132 half-cut cells

The bifacial construction enables an additional 5–15% energy gain from ground-reflected irradiance (light gravel, white roofing membrane, snow), while the 132 half-cut cell layout reduces resistive losses and improves performance under partial shading compared to full-cell configurations.

Wide range of wattage variants

Seven variants spanning 605–635 Wp allow precise string sizing to match roof or field conditions without the need for power optimizers. This is a significant advantage when designing larger agricultural and commercial PV installations.

Trade-offs
No BNEF Tier-1 bankable status

HD Solar does not appear on the BNEF Tier-1 bankable manufacturers list (confirmed Q1 2026), unlike LONGi Solar, which is present among peer comparables. This limits the availability of non-recourse bank financing for large-scale utility PV projects and may reduce module acceptability for institutional investors requiring bankability verification.

Notes from the database
  • Efficiency of 23.5% is 0.7pp above the TOPCon 600-650W median (22.8%)
  • At 235.1 W/m² power density, this panel generates 7.4 W/m² more per unit area than TOPCon 600-650W median (227.7 W/m²)
  • At -0.30%/°C, hot weather performance is typical for TOPCon 600-650W panels
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface
  • Ranked #716 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 635 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.50 % Strong Segment median 22.80%
Vmpp · Impp 41.81 V · 15.19 A Operating point at max power
Voc · Isc 48.66 V · 16.02 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 33.3 kg Typical Typical · median 32.7 kg
Cells 132 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.300 %/°C Weak bottom 19% of its segment
Coefficient Voc · Isc -0.250 · 0.045 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 555 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by HD Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 635 Wp appear here. The rest cover the whole series.

30-Year Linear Performance Warranty 30-Year Linear Performance Warranty Whole series P-V Curve (Power vs Voltage at Different Irradiance Levels) P-V Curve (Power vs Voltage at Different Irradiance Levels) 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
-0.300 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

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

Alternatives

All HD Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
HD Solar HD-N-G12-635 635 W 23.50% -0.300 33.3 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +1.7 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +45 W, lighter, +1.7 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +40 W, lighter, +1.5 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +1.5 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +1.3 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg Cooler, lighter, +1.3 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +1.3 pp
HD-N-G12-605 605 W 22.40% -0.300 33.3 kg -30 W, -1.1 pp
HD-N-G12-610 610 W 22.60% -0.300 33.3 kg -25 W, -0.9 pp
HD-N-G12-615 615 W 22.80% -0.300 33.3 kg -20 W, -0.7 pp
HD-N-G12-620 620 W 23.00% -0.300 33.3 kg -15 W, -0.5 pp
HD-N-G12-625 625 W 23.10% -0.300 33.3 kg -10 W, -0.4 pp
HD-N-G12-630 630 W 23.30% -0.300 33.3 kg Very close match
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +65 W, cooler, +1.5 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +60 W, cooler, +1.4 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +35 W, cooler, +1.3 pp

Found 1119 panels of the same or similar size to this one, within ±10 mm. See them here Found 1125 panels of the same or similar size to this one, within ±25 mm. See them here Found 1236 panels of the same or similar size to this one, within ±50 mm. See them here Found 1917 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty does the HD Solar HD-N-G12 132 Half cells series come with?
The HD-N-G12 132 Half cells series includes a 15-year product warranty and a 30-year power output warranty. The power warranty guarantees a minimum percentage of rated output after 30 years of operation, which is a critical factor when calculating ROI for commercial projects and utility-scale PV farms with a long investment horizon.
Do the HD Solar HD-N-G12 132 Half cells handle partial shading well?
Yes, the half-cut cell layout with 132 cells significantly reduces power losses under partial shading. Splitting each cell in half lowers the internal operating current, limiting the impact of shadows from chimneys, dormers, or nearby trees on the entire string. This makes the HD-N-G12 a practical choice for urban and agricultural rooftops where avoiding shading is difficult.
What does bifacial mean for the HD Solar HD-N-G12 panels, and is it worth the extra cost?
A bifacial module generates electricity from both the front side (direct irradiance) and the rear side (light reflected off the surface below). On light-colored rooftops, white membranes, or ground-mounted systems with high-albedo surfaces, bifacial gain can add several percentage points to annual yield. On standard clay rooftiles the effect is smaller but still measurable and contributes to a shorter payback period.
What is the peak power of the HD Solar HD-N-G12 132 Half cells and what does it mean for system design?
The maximum power output of the HD-N-G12 132 Half cells series reaches 635 Wp. The large-format G12 (210 mm) cells deliver high power density per square meter, reducing the total number of modules required and lowering overall BoS costs — including racking, cabling, and labor — per kilowatt-hour of energy produced.
How does TOPCon technology affect HD-N-G12 panel performance during hot summer days?
N-type TOPCon cells have a lower temperature coefficient than conventional PERC cells, meaning the percentage power drop per degree Celsius increase is reduced. In practice, HD-N-G12 modules retain more of their rated output during peak summer heat compared to standard p-type modules, delivering more predictable and consistent energy yield throughout the summer season.
What types of installations are the HD Solar HD-N-G12 132 Half cells best suited for?
The HD-N-G12 132 Half cells series is best suited for large commercial, agricultural, and ground-mounted utility-scale PV installations where high power density and low system cost per unit of energy yield are the top priorities. The combination of up to 635 Wp, TOPCon cell technology, and bifacial construction also makes them a strong fit for agrivoltaic projects and large industrial rooftops.
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