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HT-SAAE Brand review

HT66-18X(N)-625W

625 Wp TOPCon
ComparePV verdict

Light for its output, weak in heat

Rank 394 of 14,005
Compare panels Datasheet PDF
Power (Wp)
625
Typical for its class
Efficiency (%)
23.10
Typical · median 22.80%
Density (Wp/m²)
231.4
Typical · median 227.7
Temp (%/°C)
-0.310
Weak · bottom 4%
Weight (kg)
29.0
Strong · 3.7 kg below median
Warranty (yrs)
30
Typical · median 30 yrs

The HT-SAAE HT66-18X(N) series is designed for maximum energy production on large roof areas and ground-mounted installations, where long-term stability and consistent performance are key, rather than just the power rating specified in the catalog. The use of N-type cells in TOPCon technology results in very low susceptibility to degradation caused by light and temperature, making it easier to maintain predictable performance in Polish conditions. The module utilizes a half-cut design, which allows it to better handle partial shading and reduce internal losses - this is a significant advantage on roofs with obstructions, overhangs, or chimneys. Versions with double glass enhance resistance to moisture, mechanical stress, and material fatigue, which will be appreciated by investors who prioritize long-term durability. Furthermore, PID resistance and a refined connection architecture improve safety in demanding systems. This is the choice for companies, PV farms, and projects where minimizing risk and maximizing energy yield throughout the installation's lifespan are priorities.

Ranking

1,086 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.10% 22.80% Typical 1,570
Power density 231.4 227.7 Typical 1,513
Temperature coefficient -0.310 -0.290 Weak · bottom 4% 8,005
Weight per kWp 46.4 53.1 Strong · top 9% 1,141
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 2 caution
Best for

Commercial, utility-scale and shaded-installations.

Not ideal for

Hot climates.

Strengths
46.4 kg per kWp

Top 9% of the TOPCon 600-650 W segment, against a median of 53.1. Ranked 1,141st in the whole database.

Watch-outs
-0.310 %/°C temperature coefficient

Bottom 4% of the TOPCon 600-650 W segment, against a median of -0.290. Ranked 8,005th in the whole database.

What owners get
Temperature Coefficient of –0.31 %/°C

N-type TOPCon cells achieve –0.31 %/°C for Pmax, a clear advantage over PERC technology (typically –0.35 to –0.40 %/°C). In real-world conditions where modules routinely reach 60–70 °C during summer, this difference translates into several additional percentage points of annual energy yield compared to older technologies.

30-Year Power Warranty at ≥87.4%

The manufacturer guarantees ≥87.4% of nominal power output after 30 years, with a linear annual degradation rate of 0.40% (1.0% in year one), as specified in the series datasheets. Most comparable Tier-1 models — such as the Leapton LP182*199-M-72-NH — offer standard 25-year power warranties, making this series more attractive for projects with long financing horizons.

Efficiency Up to 23.3% — Top-Tier Performance

The maximum efficiency of 23.3% matches the Canadian Solar TOPBiHiKu6 Anti-Dust (23.3%) and the Jinko Tiger Neo 66HL4M-BDV (23.32%), and exceeds the Leapton LP182*199-M-72-NH (22.54%) by more than 0.75 percentage points. This high power density allows more watts to be installed within a constrained rooftop or ground-mount area.

Tier-1 Manufacturer, State-Owned Enterprise Since 1998

HT-SAAE (Shanghai Aerospace Automobile Electromechanical Co., Ltd.) is a state-owned enterprise with a 26-year track record, classified as Tier-1 bankable by BNEF. This designation confirms that the modules have been financed by independent commercial banks in at least six projects exceeding 10 MW, reducing credit and warranty risk for institutional investors.

PID Resistance and Half-Cut Cell Architecture

The half-cut architecture (132 cells) reduces partial-shading losses and lowers internal resistance — a tangible benefit on rooftops with parapets or chimneys. Certified resistance to PID (Potential Induced Degradation) is critical for 1500 V DC systems, for which this module is officially rated.

Trade-offs
Monofacial Module — No Bifacial Yield Gain

The HT66-18X(N) series is monofacial (is_bifacial: false), while two key peer comparables in the same power class — the Canadian Solar TOPBiHiKu6 Anti-Dust and the Jinko Tiger Neo 66HL4M-BDV — offer bifacial technology. In ground-mount installations (the primary target application per the manufacturer's description), albedo reflection can generate 5–15% additional annual energy yield that this module is unable to capture.

Notes from the database
  • Efficiency of 23.1% matches the TOPCon 600-650W median
  • Power density of 231.4 W/m² packs 3.7 W/m² more into the same footprint vs TOPCon 600-650W median (227.7 W/m²)
  • Temperature coefficient of -0.31%/°C is 0.02pp worse than TOPCon 600-650W median (-0.29%/°C) - higher losses in summer heat
  • 29.0 kg weight - 3.7 kg lighter than TOPCon 600-650W median (32.7 kg), reducing installation effort
  • Ranked #1570 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 625 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.10 % Typical Segment median 22.80%
Vmpp · Impp 40.40 V · 15.48 A Operating point at max power
Voc · Isc 48.50 V · 16.20 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2382×1134×35 mm · 2.70 m² of roof
Weight 29.0 kg Strong Strong · 3.7 kg below median
Cells 132 · TOPCon Monocrystalline
Coefficient Pmax -0.310 %/°C Weak bottom 4% of its segment
Coefficient Voc · Isc -0.250 · 0.046 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 30 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 546 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by HT-SAAE in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 625 Wp appear here. The rest cover the whole series.

IV Curves IV Curves 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
-0.310 %/°C against a segment median of -0.290
-

Alternatives

All HT-SAAE panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
HT-SAAE HT66-18X(N)-625W 625 W 23.10% -0.310 29.0 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +25 W, cooler, +2.1 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +50 W, cooler, +1.9 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +20 W, cooler, +1.9 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +45 W, cooler, +1.7 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +45 W, cooler, +1.7 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +1.7 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +45 W, cooler, +1.7 pp
HT66-18X(ND)-F 600W 600 W 22.20% -0.310 33.5 kg -25 W, heavier, -0.9 pp
HT66-18X(ND)-F 605W 605 W 22.40% -0.310 33.5 kg -20 W, heavier, -0.7 pp
HT66-18X(ND)-F 610W 610 W 22.60% -0.310 33.5 kg -15 W, heavier, -0.5 pp
HT66-18X(ND)-F 615W 615 W 22.80% -0.310 33.5 kg -10 W, heavier, -0.3 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +55 W, cooler, +2.1 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +75 W, heavier, +1.9 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +70 W, heavier, +1.8 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 HT-SAAE HT66-18X(N) series come with and what does it cover?
The HT66-18X(N) series carries a 30-year product warranty and a 30-year power warranty. After 30 years of operation, the manufacturer guarantees at least 87.4% of rated output. This is one of the longer warranty standards available on the market — a significant advantage when evaluating the total LCOE of utility-scale or large commercial PV installations.
Does TOPCon technology in the HT66-18X(N) series actually deliver higher yield than older PERC modules?
Yes. N-type TOPCon cells offer higher efficiency — up to 23.3% for this series — and a lower temperature coefficient of Pmax at -0.31%/°C, compared to roughly -0.35%/°C for typical PERC modules. In practice, this means lower power losses on hot summer days and higher annual energy yield under the same irradiance conditions.
How does the HT66-18X(N) perform under partial shading from a chimney or parapet wall?
The HT66-18X(N) series uses a half-cut cell design with 132 cells, which splits each cell in two and limits the hot-spot effect. When one half of a module is shaded, the other half continues generating power without losses spreading across the full string. This is a tangible benefit on commercial rooftops with parapets, chimneys, or HVAC units.
How does the HT66-18X(ND)-F double glass variant differ from the standard HT66-18X(N)?
The ND-F variant replaces the rear backsheet with a second pane of tempered glass. The double glass construction improves moisture resistance and lowers water vapor transmission rate (WVTR), resulting in slower degradation in humid climates. The module is also more resistant to mechanical damage. The trade-off is higher weight, which must be factored into the design of roof or ground-mount racking systems.
Do HT-SAAE HT66-18X(N) panels perform well in Polish weather conditions — winter, overcast skies, and snow loads?
Yes. N-type TOPCon cells have low susceptibility to light-induced degradation (LID/LeTID), which stabilizes output throughout the module's lifetime. The low temperature coefficient (-0.31%/°C) limits summer losses, and the half-cut design improves production under diffuse light. The series is certified for mechanical loads up to 5400 Pa, meeting structural requirements for Polish climatic zones.
Is the HT66-18X(N) series suitable for a residential rooftop, or is it designed for commercial and utility-scale projects?
Modules rated up to 630 Wp with dimensions of approximately 2382×1134 mm are large and weigh roughly 29–34 kg, making installation on a typical single-family rooftop considerably more difficult. This series is designed primarily for commercial rooftops, large industrial buildings, and ground-mount PV farms, where larger modules translate into lower installation and wiring costs per kilowatt of installed capacity.
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