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HT-SAAE HT54-18X(ND)-F 425W
HT-SAAE Brand review

HT54-18X(ND)-F 425W

425 Wp TOPCon Bifacial 74%
ComparePV verdict

Middle of its segment, weak in heat

Rank 6,929 of 14,005
Compare panels Datasheet PDF
Power (Wp)
425
Typical for its class
Efficiency (%)
21.80
Typical · median 22.00%
Density (Wp/m²)
217.6
Typical · median 220.2
Temp (%/°C)
-0.310
Weak · bottom 10%
Weight (kg)
24.0
Weak · 2.0 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The HT-SAAE HT54-18X(ND)-F series are modern full-black modules, seamlessly combining aesthetics with genuine performance in Polish conditions. The application of N-type cells in TOPCon technology helps mitigate typical power degradation over time and enhances installation stability, which is particularly important with rising energy costs and net-metering considerations.

This series is available in the form of dual-glass construction and bifacial design, enabling the panel to utilize light reflected from the ground surface as well. This translates to higher energy yields, especially where every additional kilowatt-hour counts - on rooftops with limited space, when installed on light-colored roofs, or on the ground.

Their advantages over many competitive modules also include resistance to micro-cracks and quality control in the form of double EL testing, reducing the risk of hidden defects after transportation and installation. The HT54-18X(ND)-F series is an excellent choice for homes, small businesses, and projects where appearance, durability, and reliable performance matter.

Ranking

1,218 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.80% 22.00% Typical 7,022
Power density 217.6 220.2 Typical 7,172
Temperature coefficient -0.310 -0.290 Weak · bottom 10% 8,005
Weight per kWp 56.5 51.4 Weak · bottom 18% 10,661
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 3 caution
Best for

Residential and commercial.

Not ideal for

Hot climates and weight-limited structures.

Watch-outs
-0.310 %/°C temperature coefficient

Bottom 10% of the TOPCon 400-450 W segment, against a median of -0.290.

56.5 kg per kWp

Bottom 18% of the TOPCon 400-450 W segment, against a median of 51.4.

What owners get
N-type TOPCon – Low Temperature Coefficient

The temperature coefficient of Pmax is -0.31%/°C, outperforming typical PERC modules (~-0.35%/°C). Under Polish summer rooftop conditions (35–45°C), this translates to 0.15–0.2 percentage points lower power loss per degree above STC, compounding into a measurable increase in annual energy yield.

30-Year Product and Power Output Warranty

The manufacturer guarantees ≥87.4% of nominal power after 30 years of operation. The peer-comparable Zonergy ZPM MH3-72 offers a standard 25-year warranty, and the industry norm stands at 25–27 years. The extended warranty reduces financial risk for prosumer installations and commercial projects when modeled on a DCF basis.

Dual-Glass Bifacial Construction (up to +20% rear-side gain)

The dual-glass design combined with bifacial architecture enables absorption of irradiance reflected from the mounting surface. The manufacturer claims up to +20% additional energy generation depending on the surrounding albedo — a significant advantage in ground-mount systems, installations over light-colored roofing, or snow-covered surfaces.

Efficiency up to 23.0% – Top of Segment

Peak efficiency of 23.0% (460 Wp variant) matches the Risen RSM96-11-460BNDG (23.0%) and SunKean SKT460M12-96D4 (23.02%), and is substantially above the Zonergy ZPM MH3-72 (21.16%). The series ranks in the top 10% of 108-cell full-black TOPCon modules.

Tier-1 BNEF, Manufacturer Since 1998

HT-SAAE is listed on the BloombergNEF Tier-1 PV module index and has been active in the market for over 25 years, ensuring bankability for debt-financed projects and credibility in honoring long-term warranty obligations.

Trade-offs
25 kg Weight – Structural Reinforcement May Be Required

The dual-glass construction increases module weight to 25.0 ± 0.5 kg, approximately 4 kg more than typical single-glass monofacial modules (~21 kg). For larger rooftop installations (>10 kWp), a structural assessment of the roof framing load capacity may be required, adding cost to the engineering scope of the project.

Notes from the database
  • Efficiency of 21.8% matches the TOPCon 400-450W median
  • At 217.6 W/m² power density, roof space requirements are typical for TOPCon 400-450W panels
  • -0.31%/°C temperature coefficient - 0.02pp worse than TOPCon 400-450W median (-0.29%/°C), expect higher hot weather losses
  • At 24.0 kg, this panel is 2.0 kg heavier than the TOPCon 400-450W median (22.0 kg) - more demanding for installation crews
  • 74% bifaciality enables rear-side power generation, boosting yield by 4-11% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 425 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.80 % Typical Segment median 22.00%
Vmpp · Impp 31.70 V · 13.42 A Operating point at max power
Voc · Isc 38.20 V · 14.15 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 24.0 kg Weak Weak · 2.0 kg above median
Cells 108 · TOPCon Monocrystalline
Bifaciality 74 % Rear output as a share of front
Coefficient Pmax -0.310 %/°C Weak bottom 10% 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 371 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 425 Wp appear here. The rest cover the whole series.

Warranty Warranty 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
-
With bifacial gain
-

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
-
Bifacial gain
Rear gain over light concrete: -
-

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

Alternatives

All HT-SAAE panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
HT-SAAE HT54-18X(ND)-F 425W 425 W 21.80% -0.310 24.0 kg You are here
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg +50 W, +2.2 pp, +10 yr warranty
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +40 W, lighter, +2.0 pp
JAT54S40-475/LR 475 W 23.80% -0.260 19.3 kg +50 W, cooler, +2.0 pp
TWMNH-48HW475 475 W 23.80% -0.280 23.7 kg +50 W, cooler, +2.0 pp
CHSM48RN(DG)/F-BH-475 475 W 23.80% -0.290 24.5 kg +50 W, cooler, +2.0 pp
AIKO-A475-MCE54Mw 475 W 23.80% -0.260 21.0 kg +50 W, cooler, +2.0 pp
AIKO-A475-MAH54Mw 475 W 23.80% -0.260 21.5 kg +50 W, cooler, +2.0 pp
HT54-18X(PD)-F 400W 400 W 20.50% -0.330 24.0 kg -25 W, hotter, -1.3 pp
HT54-18X(PD)-F 405W 405 W 20.70% -0.330 24.0 kg -20 W, hotter, -1.1 pp
HT54-18X(PD)-F 410W 410 W 21.00% -0.330 24.0 kg -15 W, hotter, -0.8 pp
HT54-18X(PD)-F 415W 415 W 21.30% -0.330 24.0 kg -10 W, hotter, -0.5 pp
HT54-18X(PD)-F 420W 420 W 21.50% -0.330 24.0 kg Hotter, -0.3 pp
HT54-18X(ND)-F 430W 430 W 22.00% -0.310 24.0 kg Very close match
HT54-18X(ND)-F 435W 435 W 22.30% -0.310 24.0 kg +10 W, +0.5 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +85 W, cooler, +3.2 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +70 W, cooler, +3.0 pp

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Common questions

6 answered
What warranty comes with the HT-SAAE HT54-18X(ND)-F series?
The HT54-18X(ND)-F series carries a 30-year product warranty and a 30-year linear power warranty. This is among the longest coverage periods available in the residential and small-commercial segment — many budget modules offer only 10–12 years on the product and 25 years on power output. The extended protection reduces financial risk over the full lifecycle of a prosumer installation.
What is TOPCon technology and why does the HT54-18X(ND)-F use it instead of PERC?
TOPCon (Tunnel Oxide Passivated Contact) uses N-type cells with an ultra-thin tunnel oxide and polysilicon passivation layer to reduce carrier recombination. Compared to PERC, this delivers higher module efficiency (up to 23%), a lower temperature coefficient (-0.31 %/°C), and slower annual degradation. In climates with frequent overcast days, like Central Europe, the result is measurably more energy yield year-round.
Can the HT54-18X(ND)-F handle heavy snow and strong winds on a residential roof?
Yes. The dual-glass construction of the HT54-18X(ND)-F is rated for snow loads up to 5,400 Pa and wind loads up to 2,400 Pa. The module operates reliably across a temperature range of -40°C to +85°C. These figures comfortably exceed the structural requirements defined under European standard EN 1991 for most central and northern European climate zones.
How much does the HT54-18X(ND)-F weigh, and can a typical roof structure support it?
The module weighs approximately 25 kg with dimensions of 1,762 × 1,134 × 30 mm. The dual-glass design adds weight compared to single-glass full-black panels of similar wattage. For older timber-framed roofs, it is advisable to have a structural engineer or experienced installer verify rafter and batten load capacity before proceeding with the project.
Does the bifacial design of the HT54-18X(ND)-F make a real difference on a pitched roof?
On a standard dark-colored pitched roof, bifacial gain is minimal because the rear glass is shaded. The bifacial effect becomes meaningful with a high-albedo surface beneath the array — a light-colored flat roof membrane, gravel ballast, or light-colored ground cover — typically adding 5–15% extra energy yield. For ground-mount systems or flat roofs with a reflective substrate, the HT54-18X(ND)-F bifacial design delivers a clear advantage.
Are the HT54-18X(ND)-F modules compatible with popular inverters, and how long can the strings be?
The HT54-18X(ND)-F supports a maximum system voltage of 1,500 V DC, enabling longer string configurations and better utilization of three-phase inverters in the 10–15 kW class. The electrical parameters comply with IEC 61730, ensuring compatibility with inverters from Fronius, SMA, Huawei, Sungrow, and other brands common in European markets. Always validate string sizing using the inverter manufacturer's official string calculator.
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