The Eurener Nexa 515W TOPCon Mono Bifacial panel is a high-output, all-black monocrystalline module built on Eurener's N-type TOPCon platform, sized for installations with more available roof or ground-mount area.
Manufactured in Spain, this Nexa Double Glass Bifacial model pairs N-type half-cut bifacial cells with a durable dual-glass construction, delivering 23.16% module efficiency and strong rated output from a larger 1961mm frame.
30 Yrs
Performance Warranty
✓ Good to Know
This panel uses
N-type TOPCon bifacial cell technology, giving it better low-light performance and lower degradation than older P-type designs. As Eurener's
Premium Partner programme extends product warranties on qualifying purchases, always confirm current warranty terms with your supplier.
Key Features
N-Type TOPCon Cell Technology
Tunnel oxide passivated contact cells reduce recombination losses versus P-type cells, giving better low-light performance and lower degradation over the panel's lifetime.
No LID by Design
N-type cells are immune to Light Induced Degradation (LID) by nature, helping the panel maintain a strong power curve across its full 30-year service life.
Bifacial Dual-Glass Build
Double-glass construction with a bifaciality factor of 80% ± 5% allows the rear cell surface to capture reflected light, adding up to 10% bifacial gain (567Wp) depending on albedo.
All-Black Premium Finish
Black anodised aluminium frame with a matching black backsheet for a clean, uniform appearance suited to residential rooflines.
High Reliability Manufacturing
Camera-inspected cell welding and strict production quality control minimise potential induced degradation (PID) and ensure consistent electrical output across every module.
Long-Term Warranty Coverage
25-year product warranty and a 30-year linear performance warranty guaranteeing 88% power retention at year 30, backed by Eurener's EcoVadis Platinum-rated manufacturing.
Technical Specification
Electrical Characteristics (STC)
Nominal power (Pmax)515 Wp
Module efficiency23.16%
Open-circuit voltage (Voc)40.72 V
Short-circuit current (Isc)15.98 A
Maximum power voltage (Vmp)33.99 V
Maximum power current (Imp)15.30 A
Bifacial Performance (10% Gain)
Nominal power (Pmax)567 Wp
Bifaciality factor80% ± 5%
Mechanical Specification
Solar cellsN-type bifacial monocrystalline half-cut cells
Front glass2mm anti-reflective tempered solar glass
Back glass2mm tempered solar glass
FrameBlack anodised aluminium
Junction boxIP68, 3 by-pass diodes
ConnectorOriginal MC4-Evo 2
Cable1200mm (±20%) length, 4mm² section
Dimensions1961 x 1134 x 30mm
Weight27.5 kg
Temperature Coefficients
Temperature coefficient of Isc (α)0.046%/°C
Temperature coefficient of Voc (β)-0.25%/°C
Temperature coefficient of Pmax (γ)-0.29%/°C
NOCT45°C ± 2°C
Operating Parameters
Maximum system voltage1500 V DC
Maximum series fuse rating25 A
Power output tolerance0 to +3%
Fire ratingBROOF (t4) / Class A
Protection classClass II
Mechanical load — front5400 Pa
Mechanical load — back2400 Pa
Hail resistanceRG3/HW3 certified
Warranty & Certification
Product warranty25 years (+5 years for Premium Partners)
Linear performance warranty30 years, 88% at year 30
Product codeMEPV 515
StandardsIEC 61215, IEC 61730, IEC 61701, IEC 62716, IEC TS 62804
Frequently Asked Questions
What is the bifacial gain on this panel?
The panel has a bifaciality factor of 80% ± 5%, allowing up to a 10% power uplift from rear-side light capture — taking it from 515Wp to 567Wp under favourable conditions.
Does this panel suffer from Light Induced Degradation (LID)?
No. As an N-type cell, it is inherently free from LID, helping maintain consistent output over the panel's operating life compared with older P-type PERC designs.
What warranty is provided?
Eurener backs this panel with a 25-year product warranty (extendable to 30 years for Premium Partners) and a 30-year linear performance warranty guaranteeing 88% output retention at year 30.
How big is this panel compared with other Eurener Nexa models?
At 1961 x 1134mm, this is the larger of Eurener's Nexa Double Glass Bifacial variants, suited to installations with more available roof or ground-mount space than the compact 475W model.
What connectors does the panel use?
It ships with original MC4-Evo 2 connectors as standard, ensuring compatibility with the vast majority of UK string inverters and DC isolators.
