DMEGC Solar Panels: N-Type & Glass-to-Glass | Official Wholesale EU

Rebor supplies a selection of DMEGC solar panels for the European market. DMEGC Solar is a Tier-1 manufacturer with a broad product portfolio in N-Type monocrystalline technology. Our range includes exclusively N-Type glass-glass panels — available in monofacial All Black version for residential roofs and bifacial Black Frame or silver frame version for commercial and project-based installations. View the current models below for the exact Wp class and datasheet per model.

N-Type monocrystalline: what it is and what it means in practice

All DMEGC models in our range use N-Type monocrystalline cells. N-Type cells use phosphorus as a dopant instead of boron (P-Type). This eliminates the boron-oxygen pairs responsible for LID (Light Induced Degradation) in P-Type cells — the accelerated degradation in the first year of use. The result is lower first-year degradation and a more favourable temperature coefficient than P-Type PERC panels.

In practice: at higher roof temperatures, an N-Type panel loses less power than a comparable P-Type panel. Over a 30-year period, this contributes to a higher total energy yield. All current DMEGC models have a glass-glass construction (dual glass) — both monofacial and bifacial — offering superior mechanical protection, PID resistance and a longer service life compared to glass-backsheet constructions.

N-Type ≠ PERC: The current DMEGC models in our range are N-Type monocrystalline — not PERC. PERC is a P-Type technology with higher first-year degradation (LID) and a less favourable temperature coefficient. N-Type and PERC are fundamentally different cell chemistries and are not interchangeable as terms.

Two product lines: monofacial All Black and bifacial Infinity RT / Infinity

The DMEGC range at Rebor includes two construction variants. Both use N-Type monocrystalline cells and a glass-glass construction — the difference lies in light capture, aesthetics and the application profile.

Feature Monofacial glass-glass All Black
(G-series)		 Bifacial glass-glass
(Infinity RT / Infinity — B-series)
Cell technology N-Type monocrystalline N-Type monocrystalline
Light capture Front side Front and rear side — additional yield depending on albedo and mounting
Construction Glass-glass (2 mm tempered glass front + rear) Glass-glass (2 mm tempered glass front + rear, anti-reflective coating front)
Frame colour All Black (black anodised aluminium) Black Frame or silver frame — depending on model
Aesthetics Fully black — DMEGC Advanced Black Technology Black Frame or silver frame — functionally optimised
Fire safety class Refer to datasheet per model IEC Class C (bifacial models)
Max. system voltage 1,500V DC 1,500V DC
Warranty structure 25-year product + 30-year linear performance 25-year product + 30-year linear performance
Typical application Pitched residential roof, aesthetics as priority Commercial roof, carport, ground-mounted system, light-coloured surface

Which DMEGC panel suits your project?
Situation Recommended line Key advantage
Pitched residential roof, fully black appearance required Monofacial All Black glass-glass (G-series) DMEGC Advanced Black Technology — fully black appearance, N-Type efficiency, glass-glass durability
Commercial roof, carport or ground-mounted system, bifacial yield required Bifacial glass-glass (Infinity RT / Infinity — B-series) Additional rear-side yield on suitable surface, robust glass-glass construction
Installation in coastal area or agricultural environment Monofacial All Black line (G-series) Certified to IEC 61701 (salt mist) and IEC 62716 (ammonia) — refer to bifacial model datasheet for B-series certifications
Pitched roof where rear side receives no light Monofacial All Black glass-glass (G-series) Glass-glass mechanical advantages without the added cost of bifacial cells — technically appropriate choice for pitched roofs
Large-format panel required for efficient string configuration Both lines — view current models above Both lines are available in 54-cell and 60-cell formats — view current models above for the exact Wp class

View the current models above for the exact Wp class and datasheet per model, or contact us via our contact page for tailored project advice.

Warranty and power degradation

DMEGC applies a 30-year linear power warranty structure to all current N-Type models in our range. The low annual degradation is characteristic of the N-Type cell architecture — significantly lower than P-Type PERC panels.

Warranty structure — all current models:

  • Product warranty: 25 years
  • Power warranty: 30 years linear
  • Low first-year degradation (LID) — characteristic of N-Type cell architecture
  • Low annual degradation after year 1 — refer to the datasheet of the current model for the exact value
  • Refer to the product page or datasheet of the current model for exact residual output percentages and degradation curve

Panel-inverter compatibility: operating current and MPPT range

All current DMEGC models are compatible with modern 1,500V DC systems. When configuring a string, the open-circuit voltage (Voc) and short-circuit current (Isc) per model determine the number of panels per string and the inverter selection. The exact electrical parameters are in the datasheet of the current model — refer to the product page above.

We supply DMEGC panels preferably in combination with hybrid inverters from Solis and GoodWe — both brands support 1,500V DC systems. Note that current models may use different connector types (MC4-EVO 2A or Stäubli PV-KST4-EVO2) — verify connector compatibility with your inverter and cabling before installation. For a tailored string calculation, refer to our battery calculator or technical support.

Note — glass-glass mounting: Glass-glass modules require approved mounting clamps that overlap the module frame by a minimum of 10 mm, in accordance with DMEGC's official installation guidelines. Refer to the installation manual for the correct configuration. Installation by certified installers only.

Environmental resistance and certifications

All current DMEGC models are certified to IEC 61215 and IEC 61730. The monofacial All Black line (G-series) is additionally certified to IEC 61701 (salt mist resistance) and IEC 62716 (ammonia resistance), making these models suitable for installations in coastal areas and agricultural environments. Refer to the datasheet of the current bifacial model (B-series) for the certifications of that line.

The glass-glass construction provides enhanced mechanical protection and resistance to micro-cracks. All current models have been tested to a maximum static load of 5,400 Pa on the front side. The junction box is certified to IP68 in accordance with IEC 62790. Refer to the datasheet of the current model for the complete certification list and load values.

Diagnostic protocol: power loss in N-Type glass-glass panels

N-Type panels are less susceptible to LID and PID than P-Type PERC panels due to their cell architecture. Nevertheless, other causes can lead to unexpected power loss. The following protocol assists with diagnosis.

  1. Check inverter data. Compare the daily yield (kWh) of the relevant string with a reference period. A consistently lower pattern at specific times of day indicates a structural shading source or a fault in that string.
  2. Check the bifacial rear side (B-series). Soiling or obstruction of the rear side reduces bifacial yield. Verify that the rear side is free of obstacles and dirt. Bifacial yield is strongly dependent on the albedo of the surface and the mounting height.
  3. Measure the open-circuit voltage (Voc) per string. A significantly lower Voc than the theoretical value may indicate a defective bypass diode or a damaged panel.
  4. Check the mounting clamps. In glass-glass modules, incorrectly positioned clamps (less than 10 mm overlap) can cause mechanical stress and micro-cracks. Visually inspect for glass cracks or detached clamps.
  5. Check the junction box (IP68) and connectors. Visually inspect for moisture ingress or corrosion. Verify that connectors are correctly locked and not mixed with other connector types.
Note: A single instance of power loss in practice does not constitute evidence of a structural product defect. Power loss is in most cases caused by installation or environmental factors. If in doubt, engage a certified installer for a full system inspection.

Frequently asked questions about DMEGC solar panels

What is the advantage of N-Type over P-Type PERC?

N-Type solar cells use phosphorus as a dopant instead of boron (P-Type). This eliminates the boron-oxygen pairs responsible for LID (Light Induced Degradation) in P-Type cells — the accelerated degradation in the first year of use. The first-year degradation of N-Type is therefore significantly lower than P-Type PERC. N-Type also has a more favourable temperature coefficient — at higher roof temperatures, an N-Type panel loses less power than a comparable P-Type panel. Over a 30-year period, this contributes to a higher total energy yield. The current DMEGC models in our range are exclusively N-Type — not PERC.

Why choose glass-glass over glass-backsheet?

A glass-glass construction offers superior mechanical protection, PID resistance and a longer service life compared to glass-backsheet constructions. The solar cells are encapsulated between two layers of tempered glass, providing better protection against moisture, UV degradation and mechanical stress. This reduces the risk of micro-cracks and contributes to more stable long-term performance. All current DMEGC models in our range have a glass-glass construction. Note: glass-glass modules require approved mounting clamps that overlap the module frame by at least 10 mm — refer to the installation manual.

Are DMEGC panels suitable for coastal areas and agricultural environments?

The monofacial All Black line (G-series) is certified to IEC 61701 (salt mist resistance) and IEC 62716 (ammonia resistance), making these models suitable for installations in coastal areas and agricultural environments. Refer to the datasheet of the current bifacial model (B-series) for the specific certifications of that line.

How much additional yield does a bifacial DMEGC panel deliver?

The additional yield of a bifacial panel is strongly dependent on the reflectivity of the surface (albedo), the mounting height above the surface and the project design. On a dark surface (low albedo), the additional yield is limited; on a light surface (light gravel, snow), the additional yield can be significant. The bifaciality factor of the current bifacial DMEGC models is 80% ± 5%. Refer to the datasheet of the current model for the exact values and use a suitable simulation tool for an accurate yield calculation based on your specific project location.

What warranty structure does DMEGC use?

DMEGC applies a 25-year product warranty and a 30-year linear power warranty to all current N-Type models in our range. Annual degradation after year 1 is low — characteristic of the N-Type cell architecture. Refer to the product page or datasheet of the current model for the exact degradation curve and residual output percentages.

Which inverters are compatible with DMEGC panels?

All current DMEGC models are compatible with modern 1,500V DC systems and work with hybrid inverters from Solis and GoodWe. Note that current models may use different connector types (MC4-EVO 2A or Stäubli PV-KST4-EVO2) — verify connector compatibility with your inverter and cabling before installation. For an exact string calculation, refer to our battery calculator or technical support.

Where can I find the exact specifications of a DMEGC model?

The exact specifications per model — including Wp, dimensions, weight, Voc, Isc, Vmpp, Impp, temperature coefficient, warranty period and degradation curve — are available on the individual product page and in the accompanying datasheet. View the current models above and click through to the product page for the complete technical overview.

How do DMEGC panels compare to other brands in our range?

DMEGC N-Type glass-glass panels stand out through the combination of N-Type cell architecture, glass-glass construction across both product lines and a strong price-performance ratio for a Tier-1 brand. For comparison: JA Solar and Trina Solar also supply N-Type glass-glass panels in a comparable efficiency range. Aiko ABC panels achieve the highest module efficiency in our range based on a back-contact architecture. LONGi offers HPBC 2.0 N-Type and bifacial glass-glass variants. Use the battery calculator for a tailored system recommendation.