Middle of its segment, weak in heat
The MY Solar GOLD N-Type HJT BIFACIAL series is a breakthrough solution combining heterojunction technology with N-type cells, which translates into unrivaled efficiency in real weather conditions. Thanks to the use of advanced HJT technology, these modules are characterized by minimal degradation and exceptional thermal stability, allowing for the generation of maximum energy even on hot summer days. A key advantage of this series is full bifaciality, which enables effective absorption of light reflected from the ground, significantly increasing the total yield from the installation compared to commonly used monofacial panels. This design effectively eliminates problems related to LID and LeTID effects, guaranteeing investors long-term security and a much faster return on investment. These panels are dedicated to the most demanding commercial projects and modern energy-efficient homes, where the priority is the highest yield from a limited mounting area. This solution stands out from the competition with its extremely high bifaciality factor and excellent sensitivity in low sunlight, which makes the system work efficiently from early dawn until late dusk. Choosing this series is a direct investment in the highest energy efficiency, which sets new standards for durability and reliability in the Polish renewable energy sector.
Ranking
Signals from the data
Commercial and utility-scale.
Hot climates.
Bottom 18% of the HJT 600-650 W segment, against a median of -0.240.
N-type HJT cells contain no boron-oxygen complex, effectively eliminating LID and LeTID effects. Annual degradation of around 0.25% after the first year enables roughly 90-92% power retention after 30 years of operation.
A temperature coefficient of about -0.24%/°C (an advantage over TOPCon, typically around -0.30%/°C) translates into 4-6% higher energy yield during hot days, which matters for Polish rooftop installations in summer.
The manufacturer offers a 30-year product warranty and a 30-year linear power warranty, matching top-tier peer comparables such as Luxor Solar Eco Line HJT and exceeding the typical 25-year warranties of TOPCon modules (e.g. Trina Vertex N).
The glass-glass HJT construction achieves a bifaciality factor of roughly 85-95%, which, depending on ground albedo and mounting height, can boost total array yield by an additional 5-25% compared to monofacial modules.
10 power variants from 620 to 720 Wp with efficiency up to 23.17% give installation designers flexibility to match module output to a specific roof area or PV farm without switching technology.
The series has been discontinued (launched in 2022, now marked as discontinued), meaning limited availability of warranty service and replacement parts, and potential difficulty sourcing identical modules for future array expansions.
MY Solar is not listed among Tier-1 bankable manufacturers, unlike comparable series from DMEGC or Trina Solar. This can make it harder to secure bank financing or favorable insurance terms for larger commercial projects.
Maximum efficiency of 23.17% trails Luxor Solar Eco Line N-Type HJT (23.39%) and comparable DMEGC and Trina Vertex N modules (23.2%) at the same 720 Wp power class, yielding slightly less output per square meter.
- At 22.6% efficiency, this panel is on par with typical HJT 600-650W modules
- Power density of 226.1 W/m² matches the HJT 600-650W median
- At -0.26%/°C, loses 0.02pp more power per degree than HJT 600-650W median (-0.24%/°C)
- At 35.2 kg (1.6 kg above HJT 600-650W median of 33.6 kg), requires checking roof load capacity
- Bifaciality factor of 85% can add 4-13% extra yield with reflective mounting surface
Specifications
Datasheet charts
Measured curves published by MY Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 640 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.
Alternatives
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About the GOLD N-Type HJT BIFACIAL series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.