HJT Solar Panel 500W–520W Maysun Solar | Full Black, Bifacial, Glass-Glass, All-Black

Maysun Solar HJT solar panel 500W–520W bifacial glass-glass all-black Full Black

Maysun Solar HJT solar panel 500W–520W bifacial glass-glass all-black Full Black – front

Maysun Solar HJT solar panel 500W–520W bifacial glass-glass all-black Full Black – rear

HJT solar panel 500W–520W bifacial glass-glass all-black

HJT solar panel 500W–520W bifacial glass-glass all-black – front

HJT solar panel 500W–520W bifacial glass-glass all-black – rear

Full Black HJT Solar Panel 500W to 520W All-Black, Bifacial, Glass-Glass

Q: What are the key advantages of HJT technology?

HJT photovoltaic modules offer high bifaciality, a low temperature coefficient, low degradation, and high energy efficiency supported by a simplified manufacturing process.

Q: Do HJT modules stay more stable in high temperatures?

Yes. With a temperature coefficient of around −0.24%/°C, HJT solar panels typically lose less power at high temperatures than many conventional technologies, helping to maintain yield in summer and warmer European climates.

Q: Why are 500W–520W HJT modules a good fit for European roofs?

This power range offers a balanced relationship between size, weight, and output, making 500W–520W HJT photovoltaic modules well suited to residential and commercial roofs across Europe without placing unnecessary loads on roof structures.

Q: How does the low degradation of HJT modules affect long-term yield?

With degradation typically below 1% in year one and around 0.25% per year thereafter, HJT photovoltaic modules can deliver higher lifetime energy yield and more stable economic performance over 25–30 years.

	Power: 500 W 505 W 510 W 515 W 520 W
	Efficiency: 22.5%–23.4%
	Weight: 27.1 kg
	Dimensions (L × W × H): 1960 mm × 1134 mm × 30 mm
	Packing: 36 pcs/pallet, 864 pcs/40' HQ
	Warranty: 30-year product and performance warranty

Module Mechanical Data

Mechanical Data

Solar cell

HJT N-type 210 × 182 mm

Number of cells

108 cells (6 × 18)

Module dimensions

1960 mm × 1134 mm × 30 mm

Weight

27.10 kg

Front glass

2.0 mm tempered glass with high light transmittance and anti-reflective coating

Encapsulation

POE

Back glass

2.0 mm tempered glass with high light transmittance and thermal resistance

Frame

Anodised aluminium frame

Junction box

IP68 protection rating (with 3 bypass diodes)

Cable

4.0 mm² photovoltaic cable, M 1200 mm / P 1200 mm (customisable)

Connector

MC4-compatible

* For full details of the mechanical data and connectors, please refer to the relevant datasheet.

Download technical datasheet

Module Type Table

Key Performance Figures

500–520W

Module power

22.5–23.4%

Module efficiency

30 years

Product warranty

Key Product Benefits

SMBB technology (18BB)

Advanced multi-busbar technology reduces resistive losses and improves PV conversion efficiency.

No LID or LeTID effect

Optimised materials and process control minimise light-induced degradation and support stable long-term yields.

Low power temperature coefficient

With a temperature coefficient of -0.243%/°C, output remains more stable even at higher module temperatures.

Excellent low-irradiance performance

High energy yield even in diffuse light – delivering more usable generation hours throughout the day.

Low power degradation

Power degradation ≤1% in the first year and ≤0.25% per year from year 2 to year 30 – after 30 years, around 90.3% of the rated power remains available.

Reduced hotspot risk

HJT modules have lower string resistance and a more even thermal distribution – reducing local overheating (hotspots) and improving system safety.

HJT – clean and uniform aesthetics

Consistent appearance
on both front and rear sides
Clean, well-ordered and professional

Thanks to the low-temperature manufacturing process and the uniform deposition of HJT cells, colour variations are significantly lower than with conventional technologies. This allows the module to maintain a visually consistent appearance across different production batches and angles of incidence. The front-side busbars are finer, while the rear side features a clearly structured layout. Whether installed on rooftops, carports or façades, the overall look remains calm and balanced, meeting the aesthetic requirements of modern residential and commercial buildings.

Making the most of every ray of sunlight

Power generation from both sides
Up to 95 % bifaciality

The symmetrical cell structure of HJT technology enables efficient light absorption on both sides of the module. On reflective surfaces such as concrete areas, metal roofs or bright surroundings, the bifacial gain becomes particularly noticeable. By generating additional power from the rear side, the energy yield per installed area can be increased and annual output improved – without adding more modules or occupying additional space.

Certified by Leading International Testing Bodies

This product complies with European and international standards and is certified according to TÜV, CE, IEC and ISO requirements – ensuring verified quality, high safety standards and long-term reliability.

Shipping

Packaging and Shipping Protection

Packaging and transport of photovoltaic modules

Secure packaging · Fast delivery from European warehouses

The photovoltaic modules are packaged in accordance with established industry standards and secured using a multi-layer protection system to minimise the risk of transport damage.

Packed on standardised wooden pallets for easy storage and handling
Additional outer protective layers to enhance transport stability
Packaging concept aligned with the requirements of common logistics channels
Support for partial deliveries and dispatch from multiple warehouses across Europe

Applications | From rooftops to ground-mounted systems

High stability in low irradiance, high temperatures or diffuse light; bifacial gain is ideal for bright roofs and highly reflective surfaces.

Residential roof

Full-black design with low reflectance – ideal for a clean, harmonious look in residential settings.

Use cases: detached houses / small apartment buildings
System size: 10.32 kWp
Module type: 500–520W HJT Full Black

Photovoltaic application on industrial and commercial rooftops

Industrial & commercial roof

Suitable for factories, supermarkets and warehouses – focused on yield and a maintenance-friendly design.

Use cases: production halls / warehouses / supermarkets
System size: 1.37 MW
Module type: 500–520W HJT bifacial

Photovoltaic application in agriculture and canopy structures

Agrivoltaics / canopies

Bifacial gain combined with reflective surfaces – ideal for greenhouses and covered parking areas.

Use cases: PV carports / lightweight agricultural greenhouses
System size: 8 kWp
Module type: 500–520W HJT bifacial

Application in ground-mounted photovoltaic systems

Ground-mounted system

Scalable projects that use bifacial modules and reflective ground surfaces to reduce LCOE and improve IRR.

Use cases: ground-mounted systems for C&I / smaller utility-scale projects
System size: 103.2 kWp
Module type: 500–520W HJT bifacial

Frequently Asked Questions

Answers to common questions about HJT technology and photovoltaic modules

Why does HJT technology deliver stable long-term performance?

HJT technology supports stable long-term performance because it does not suffer from light-induced degradation (LID). HJT solar cells use N-type silicon wafers without boron–oxygen complexes, which helps to avoid light-related efficiency losses almost entirely. This supports a long service life of up to 30 years and enables reliable electricity generation.

What are the key advantages of HJT technology?

The bifacial structure can improve generation efficiency. Low light-induced degradation, a low temperature coefficient, and high bifaciality. A simplified manufacturing process also contributes to high energy efficiency.

Do HJT modules stay more stable in high temperatures?

HJT modules have a temperature coefficient of around −0.24%/°C. As a result, power losses at high module temperatures are lower, which can translate into higher yields during hot summer months and in warmer European regions.

Why are 500W–520W HJT modules a good fit for European roofs?

The 500W–520W power range offers a balanced mix of module size, weight, and output. It is well suited to residential and commercial roofs across Europe, without placing unnecessary loads on roof structures or making installation more complex.

How does the low degradation of HJT modules affect long-term yield?

HJT modules are not affected by LID or PID. Degradation is typically below 1% in the first year and around 0.25% per year thereafter. Over 25–30 years, this can deliver higher lifetime energy yield and more stable economic results.