HJT Solar Modules: The Future of High-Efficiency Solar Technology for Balcony Systems, Carports, and More
Recommended URL: www.suns-power.com/blog/hjt-solar-modules-future-of-solar-technology
Model: SS700M, SS720M
Description:
Heterojunction (HJT) solar modules are revolutionizing the solar industry with their high efficiency, low degradation rate, and bifacial capabilities. Ideal for balcony solar systems, solar carports, and solar fences, HJT technology is setting new standards for renewable energy solutions.
What are HJT Solar Panels?
Heterojunction (HJT) solar panels combine crystalline silicon and thin-film materials to boost solar energy conversion efficiency. The heterojunction refers to the interface between two different semiconductor materials, creating a high-efficiency cell structure. This hybrid approach results in higher efficiency, better temperature tolerance, and a longer lifespan compared to traditional silicon-based solar cells.
Features:
1.Structure: HJT solar cells consist of a crystalline silicon wafer sandwiched between layers of amorphous silicon thin films. The intrinsic thin layer (i-layer) helps to passivate the silicon surface, reducing recombination losses and improving efficiency.
2.High Efficiency: HJT panels are known for their high conversion efficiency, often exceeding 24%, with some reaching up to 26% or more in laboratory conditions. This is due to the effective passivation of the silicon surface and the low temperature coefficient.
3.Low Temperature Coefficient: HJT panels perform better at higher temperatures compared to traditional solar panels. Their power output decreases less as temperatures rise, making them suitable for hot climates.
4.Bifacial Design: Many HJT panels are bifacial, meaning they can capture sunlight on both the front and rear sides, further increasing energy yield.
5.Manufacturing Process: The production of HJT panels involves lower temperature processes compared to traditional solar cells, which reduces energy consumption and potential thermal damage to the materials.
6.Durability and Longevity: HJT panels typically have a longer lifespan and better durability due to their robust design and high-quality materials.
7.Applications: Due to their high efficiency and performance in various conditions, HJT panels are used in residential, commercial, and utility-scale solar installations.
Overall, HJT monocrystalline solar panels represent a cutting-edge option in the solar industry, offering high efficiency, reliability, and performance across a range of environmental conditions.
Comparing HJT with PERC, TOPCon, and Back-Contact (BC) Solar Cells
To understand where HJT technology stands, let’s compare it to PERC, TOPCon, and Back-Contact (BC) technologies.
700~720 Watt 210mm 132Cells Double Glass Bifacial HJT Mono Half Cell PV Module Series
Models: SS700M, SS720M
| Electrical Characteristics (STC/BSTC) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Module Type | SS700M | SS705M | SS710M | SS715M | SS720M | |||||
| STC | BSTC | STC | BSTC | STC | BSTC | STC | BSTC | STC | BSTC | |
| Maximum Power-Pmax(W) | 700 | 770 | 705 | 775 | 710 | 780 | 715 | 785 | 720 | 790 |
| Open Circuit Voltage-Voc(V) | 50.13 | 50.13 | 50.29 | 50.29 | 50.44 | 50.44 | 50.59 | 50.59 | 50.74 | 50.74 |
| Short-Circuit Current-Isc(A) | 17.43 | 19.17 | 17.49 | 19.22 | 17.55 | 19.28 | 17.61 | 19.33 | 17.67 | 19.39 |
| Voltage at Pmax-Vmp(V) | 42.10 | 42.10 | 42.25 | 42.25 | 42.39 | 42.39 | 42.54 | 42.54 | 42.68 | 42.68 |
| Current at Pmax -Imp(A) | 16.63 | 18.29 | 16.69 | 18.35 | 16.75 | 18.41 | 16.81 | 18.46 | 16.87 | 18.51 |
| Module Efficiency -ηm(%) | 22.53 | / | 22.70 | / | 22.86 | / | 23.02 | / | 23.18 | / |
| Power Tolerance(W) | (0,+4.99W) | |||||||||
| Maximum System Voltage(V) | 1500Vdc (IEC/UL) | |||||||||
| Maximum Series Fuse Rating (A) | 35A | |||||||||
STC Irradiance 1000W/m², Cell Temperature 25℃, Air Mass 1.5
NOCT: Irradiance 800W/m²,Ambient Temperature 20℃,Air Mass 1.5,Wind Speed 1m/s. Test uncertainty for Power: +3%.
| Mechanical Specifications | ||||||
|---|---|---|---|---|---|---|
| External Dimensions | 2384x1303x35mm | |||||
| Weight | 38.7kg | |||||
| Solar Cells | HJT 210mm (2x66pcs) | |||||
| Glass | AR Coated 2+2 mm tempered glass | |||||
| Frame | Anodized Aluminum Alloy | |||||
| Junction Box | IP68 | |||||
| Output Cables | 4.0mm2,1200mm(+),1200mm (-), length can be customized | |||||
| Connector | MC4 Compatible | |||||
| Mechanical Load | Front Side Max. 5400Pa. Rear Side Max. 2400Pa | |||||
| Temperature Characteristics | ||
|---|---|---|
| Pmax Temperature Coefficient | -0.260%/℃ | |
| Voc Temperature Coefficient | -0.240%/℃ | |
| Isc Temperature Coefficient | +0.040%/℃ | |
| Operating Temperature | -40w~+85℃ | |
| Nominal Operating Cell Temperature(NOCT) | 44±2℃ | |
| Packing Configuration | ||||
|---|---|---|---|---|
| Pallet Dimensions | 1320x1125x2495mm | |||
| Container | 40’HQ | |||
| Pieces per Pallet | 31 | |||
| Pallets per Container | 18 | |||
| Pieces per Container | 558 | |||
Current-Voltage Power-Voltage Curves (SS700M)
HJT Solar Panel Production Process
How Do HJT Solar Modules Work?
Unlike traditional monocrystalline and polycrystalline panels, which rely solely on silicon wafers, HJT modules integrate thin layers of amorphous silicon on both sides of the crystalline silicon wafer. This design significantly reduces energy loss and enhances light absorption, leading to higher energy output.
Comparing HJT with PERC, TOPCon, and Back-Contact (BC) Solar Cells
To understand where HJT technology stands, let’s compare it to PERC, TOPCon, and Back-Contact (BC) technologies.
| Feature | PERC (Passivated Emitter and Rear Contact) | TOPCon (Tunnel Oxide Passivated Contact) | BC (Back-Contact, IBC or MBC) | HJT (Heterojunction Technology) |
|---|---|---|---|---|
| Efficiency | 21-23% | 22-25% | 22-26% | 24-26% |
| Temperature Coefficient (Lower is better) | -0.35 to -0.38%/°C | -0.30 to -0.35%/°C | -0.28 to -0.35%/°C | -0.25 to -0.27%/°C |
| Low-Light Performance | Moderate | Good | Very Good | Excellent |
| Bifacial Capability | Yes (but limited) | Yes | Yes (MBC) | Yes |
| Degradation Rate (Yearly) | ~0.5% per year | ~0.4% per year | ~0.3% per year | ~0.25% per year |
| Manufacturing Complexity | Low | Medium | High | High |
| Cost | Low (most cost-effective) | Medium | High | Highest |
| Durability & Longevity | 25+ years | 25+ years | 30+ years | 30+ years |
| Mass Production Readiness | Fully mature | Expanding fast | Niche market | Emerging |
| Best Applications | Residential & Commercial | Residential, Commercial, Utility | Premium solar installations | Balcony solar systems, solar carports, solar fences, high-performance solar farms, cold regions |
Why Choose HJT Solar Panels?
Based on the comparison, HJT solar panels stand out due to their superior efficiency, lower temperature coefficient, better low-light performance, and longer lifespan. While they are more expensive to produce, their long-term benefits make them a top choice for high-end solar projects.
Key Benefits of HJT Technology:
✅ Higher efficiency (up to 26%)
✅ Lower energy losses in high temperatures
✅ Superior performance in cloudy or low-light conditions
✅ Lower degradation rate, ensuring longer panel lifespan
✅ Ideal for high-performance applications such as balcony solar systems, solar carports, and solar fences
As the demand for more sustainable and high-performance energy solutions grows, HJT technology is set to play a major role in the future of solar power.
Folded solar suitcase 100W
Model: JVFSP-100W
1.Foldable design
2.High efficiency
3.Mono-crystalline
4.Customizable
5.Power: 100W, 160W, 280W
Solar Panels 100W
Model: SS100M10
1.Power : 100w
2.Type: Mono-crystalline
3.Size: 720*765*30mm
4.Certificate: TUV, UL, CEC, CE, INMETRO, RETIE, DEWA
5.OEM customized
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Model: SS150M10
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Jan 5, 2023
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