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EG-665M66-HU/BF-DG

665 Wp PERC Bifacial 100%
ComparePV verdict

Solid all-round for its segment

Rank 2,833 of 14,005
Compare panels Datasheet PDF
Power (Wp)
665
Typical for its class
Efficiency (%)
21.40
Typical · median 21.25%
Density (Wp/m²)
214.1
Typical · median 212.5
Temp (%/°C)
-0.340
Typical · median -0.340
Weight (kg)
38.3
Typical · median 34.5 kg
Warranty (yrs)
30
Typical · median 30 yrs

The EGing PV Aurora series redefines performance standards through the extensive use of N-type TOPCon cell technology, which directly translates into higher energy conversion efficiency and a significantly lower degradation rate over time. These panels eliminate the problem of power loss at high temperatures, offering stable operation even during hot days, which is becoming an increasing challenge for prosumer and commercial installations in the Polish climate. Their innovative SMBB architecture optimizes current paths, increasing module reliability and resistance to micro-cracks. For investors, the bifacial option is key, allowing for the generation of additional energy from reflected light, which makes the Aurora series unrivaled for ground-mounted structures or light-colored roof coverings. A standout feature compared to the competition is its excellent low-light performance, ensuring a longer period of effective power production throughout the day. This solution is dedicated to demanding large-scale projects and modern homes, where maximizing yields from every square meter of surface area matters. By choosing the Aurora series, you are opting for exceptional mechanical durability and technology that realistically accelerates the return on investment in photovoltaics.

Ranking

320 panels in the segment PERC 650-700 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.40% 21.25% Typical 8,323
Power density 214.1 212.5 Typical 8,250
Temperature coefficient -0.340 -0.340 Typical 8,778
Weight per kWp 57.6 52.3 Typical 11,303
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 3 caution
Best for

Commercial and utility-scale.

What owners get
30-Year Linear Power Warranty

A 30-year performance warranty places the Aurora series above many competitors in this power class (650–670 Wp), where 25 years remains the standard. For commercial and ground-mount installations, this translates into an extended financial planning horizon without the risk of the manufacturer failing to meet guaranteed output parameters.

Tier-1 Manufacturer with Over 20 Years of Experience

EGing PV has been operating since 2003 and is listed as a bankable Tier-1 manufacturer under the BloombergNEF methodology (threshold: 6 projects ≥10 MW, non-recourse financing from 6 banks). This provides confidence in warranty continuity and service availability over a 25–30-year operational lifetime.

Bifacial – Energy Yield from Both Sides

The bifacial module design enables additional energy generation from reflected (albedo) irradiance. At a typical ground albedo of ~20–30%, bifacial PERC panels achieve approximately 5–10% higher annual energy yield compared to monofacial equivalents, which is particularly valuable in ground-mount applications or installations over light-colored surfaces.

High Power Output 650–670 Wp – Fewer Modules per Installation

The 650–670 Wp power range reduces the module count per MW of installed capacity, directly lowering balance-of-system (BoS) costs: less cabling, fewer MC4 connectors, fewer racking components, and reduced labor. For utility-scale projects, the difference between 650 W and 500 W modules translates to approximately 23% fewer modules per megawatt.

Efficiency Up to 21.56% – Top of the PERC Class

The highest-efficiency variant in the series achieves 21.56%, placing it among the leading 132-cell PERC modules currently available and on par with direct peer benchmarks: Hiwatt HW-M12/132H (21.6%), Techwise Summit (21.57%), and ZNShine ZXM8-TP132 (21.57%).

Trade-offs
PERC, Not TOPCon – Inferior Temperature Coefficient and Bifaciality

PERC cells carry a typical temperature coefficient of −0.38%/°C versus −0.30–0.32%/°C for N-type TOPCon, which at a cell temperature of 65°C (typical summer conditions in Poland) results in approximately 0.8–1.0% lower energy yield on hot days. The bifaciality factor of PERC cells is approximately 70% compared to ~85% for TOPCon, limiting the effectiveness of the bifacial design. Several competing series in this power range already utilize TOPCon technology, including EGing PV's own Aurora Pro lineup.

Product Warranty of Only 12 Years

The 12-year product warranty (covering material and workmanship defects) falls below the premium segment standard: Jinko Tiger Neo, LONGi Hi-MO 6, and JA Deep Blue 4.0 all offer 15-year product warranties at comparable price points. Should a module fail after year 12, the investor bears the full cost of replacement.

Efficiency Marginally Below Peer Leaders

The maximum efficiency of the 670 Wp model stands at 21.56%, while direct comparators reach 21.57–21.60% (Techwise Summit 21.57%, Hiwatt HW-M12/132H 21.60%). The ~0.04 percentage-point gap is negligible in most contexts, but in high-density rooftop installations where every cm² counts, it may be a deciding factor in product selection.

Notes from the database
  • Efficiency of 21.4% matches the PERC 650-700W median
  • At 214.1 W/m² power density, roof space requirements are typical for PERC 650-700W panels
  • Temperature coefficient of -0.34%/°C matches the PERC 650-700W median
  • At 38.3 kg (3.8 kg above PERC 650-700W median of 34.5 kg), requires checking roof load capacity
  • Bifacial design (100% factor) captures reflected light - adds 5-15% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 665 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.40 % Typical Segment median 21.25%
Vmpp · Impp 38.22 V · 17.40 A Operating point at max power
Voc · Isc 46.02 V · 18.45 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×35 mm · 3.11 m² of roof
Weight 38.3 kg Typical Typical · median 34.5 kg
Cells 132 · PERC Monocrystalline
Bifaciality 100 % Rear output as a share of front
Coefficient Pmax -0.340 %/°C Typical median -0.340 of its segment
Coefficient Voc · Isc -0.250 · 0.040 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 85.0 % Equals 565 W guaranteed
Degradation 2.00 → 0.45 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by EGing PV in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 665 Wp appear here. The rest cover the whole series.

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.340 %/°C against a segment median of -0.340
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
EGing PV EG-665M66-HU/BF-DG 665 W 21.40% -0.340 38.3 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +3.8 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, lighter, +3.8 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, lighter, +3.6 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +3.6 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg Cooler, lighter, +3.6 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg Cooler, lighter, +3.5 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +3.4 pp
EG-650M66-HU/BF-DG 650 W 20.92% -0.340 38.3 kg -15 W, -0.5 pp
EG-655M66-HU/BF-DG 655 W 21.08% -0.340 38.3 kg -10 W, -0.3 pp
EG-660NT66-HU/BF-DG 660 W 21.24% -0.300 38.3 kg Cooler
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +140 W, cooler, +3.7 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +135 W, cooler, +3.5 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +130 W, cooler, +3.4 pp
AIKO-A790-GRH78Dw 790 W 24.60% -0.260 39.8 kg +125 W, cooler, +3.2 pp
TSM-NEG21C.20Q-760 760 W 24.50% -0.260 38.3 kg +95 W, cooler, +3.1 pp
AIKO-A785-GRH78Dw 785 W 24.40% -0.260 39.8 kg +120 W, cooler, +3.0 pp

Found 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What distinguishes the N-type TOPCon technology used in the EGing PV Aurora series?
N-type TOPCon cells deliver higher energy conversion efficiency and a significantly lower degradation rate compared to conventional PERC cells. In the Aurora series, this translates to more stable output throughout the system's operational life, reduced power losses on hot days due to a low temperature coefficient, and improved energy yield under overcast conditions. These advantages are precisely why EGing backs the Aurora series with an industry-leading 30-year linear power warranty.
Are bifacial EGing PV Aurora panels worth using on a pitched roof?
On a typical pitched roof with dark roof tiles, the bifacial gain is modest — in the range of 2–5% — because the rear surface of the module receives insufficient reflected irradiance. The bifacial variant of the Aurora series performs best in ground-mounted installations with a high-albedo surface such as gravel or concrete, and on flat roofs with a white membrane, where the additional energy yield can reach 10–20% compared to a monofacial module.
What warranty does the EGing PV Aurora series carry, and what does it cover?
EGing PV provides a 12-year product warranty covering physical defects and material failures, along with a 30-year linear power warranty. The power warranty limits degradation to no more than 2% in the first year and a maximum of 0.45% per year thereafter, ensuring that the module retains approximately 85% of its nominal power output after 30 years of operation. These warranty terms apply to the dual-glass module configuration.
What types of installations are EGing PV Aurora panels with output up to 670 Wp suited for?
With output reaching up to 670 Wp, the Aurora series is designed primarily for large-scale ground-mounted systems, commercial warehouses and industrial facilities, and modern single-family residences where maximizing energy yield per square meter is critical. The high per-module power rating reduces the total number of modules required to meet a target system capacity, thereby lowering balance-of-system (BoS) costs — including structural and wiring expenditures.
Is EGing PV a reliable manufacturer — is the company on the Tier 1 list?
Yes, EGing PV is listed on the Bloomberg NEF Tier 1 module manufacturers list, which means it meets rigorous bankability criteria and has demonstrated the financial capacity to honor long-term warranties. The company has been operating since 2003, owns its manufacturing facilities in China, and regularly supplies modules to utility-scale projects across European and Asian markets. Tier 1 status is frequently required by financial institutions as a condition for funding photovoltaic investments.
How does SMBB technology in the EGing PV Aurora series affect module durability and reliability?
The SMBB (Super Multi Busbar) architecture replaces wide conventional busbars with a dense network of thin round wires, shortening current paths and reducing thermally induced mechanical stress within the cell. The result is markedly improved resistance to microcracks that can develop during installation or under mechanical loading from snow and wind. The reduced risk of hot spot formation directly contributes to module reliability over the full 30-year service life.
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