--- title: "EGing PV EG-655M66-HU/BF-DG 655W Solar Panel - Specs & Review | ComparePV" description: "EGing PV EG-655M66-HU/BF-DG 655W solar panel. Specs: 21.08% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/eging-pv-eg-655m66-hu-bf-dg" updated: 2026-09-11 --- # EGing PV EG-655M66-HU/BF-DG Middle of its segment, heavy for its output 320 panels in the segment PERC 650-700 W ## Identity - **Manufacturer:** EGing PV - **Model:** EG-655M66-HU/BF-DG - **Series:** Aurora Series - **Rated power:** 655 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 650-700 W (320 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 655 W | 660 W | Weak - bottom 25% | | | Module efficiency | 21.08% | 21.25% | Weak - bottom 17% | 9,586 | | Power density | 210.9 | 212.5 | Weak - bottom 24% | 9,459 | | Temperature coefficient | -0.340 | -0.340 | Typical | 8,778 | | Weight (kg) | 38.3 kg | 34.5 kg | Weak - bottom 14% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.08% | 21.25% | Weak - bottom 17% | 9,586 | | Power density | 210.9 | 212.5 | Weak - bottom 24% | 9,459 | | Temperature coefficient | -0.340 | -0.340 | Typical | 8,778 | | Weight per kWp | 58.5 | 52.3 | Weak - bottom 14% | 11,751 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **58.5 kg per kWp** - Bottom 14% of the PERC 650-700 W segment, against a median of 52.3. - **21.08% module efficiency** - Bottom 17% of the PERC 650-700 W segment, against a median of 21.25%. - **210.9 watts per square metre** - Bottom 24% of the PERC 650-700 W segment, against a median of 212.5. - **Best for:** Commercial and utility-scale. - **Not ideal for:** Weight-limited structures, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 655 W - **Efficiency:** 21.08 % - **Voltage at Pmax (Vmp):** 37.89 V - **Current at Pmax (Imp):** 17.29 A - **Open-circuit voltage (Voc):** 45.71 V - **Short-circuit current (Isc):** 18.34 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 44 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 132 - **Bifacial:** yes - **Bifacial gain:** 20.00 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 38.3 kg - **Area:** 3.11 m2 - **Power density:** 210.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 556 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9586 of 14005 | | Power density | 9459 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 11751 of 14005 | | Warranty | 21 of 14005 | ## Pros - **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%). ## Cons - **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. ## About this series 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. ## Notable figures - At 21.1% efficiency, this panel is on par with typical \*\*PERC 650-700W\*\* modules - At 210.9 W/m² power density, roof space requirements are typical for \*\*PERC 650-700W\*\* panels - At -0.34%/°C, hot weather performance is typical for \*\*PERC 650-700W\*\* panels - At 38.3 kg (3.8 kg above \*\*PERC 650-700W\*\* median of 34.5 kg), requires checking roof load capacity - Bifaciality factor of 100% can add 5-15% extra yield with reflective mounting surface ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ff83bf96bd73011-bebe7a98cb2c.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +4.1 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, lighter, +4.1 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, lighter, +3.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +3.9 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +45 W, cooler, +3.9 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +40 W, cooler, +3.8 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, lighter, +3.7 pp | | [EGing PV EG-650M66-HU/BF-DG](https://comparepv.com/panel/eging-pv-eg-650m66-hu-bf-dg) | 650 W | Very close match | | [EGing PV EG-660NT66-HU/BF-DG](https://comparepv.com/panel/eging-pv-eg-660nt66-hu-bf-dg) | 660 W | Cooler | | [EGing PV EG-665NT66-HU/BF-DG](https://comparepv.com/panel/eging-pv-eg-665nt66-hu-bf-dg) | 665 W | +10 W, cooler, +0.3 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +150 W, cooler, +4.0 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +145 W, cooler, +3.8 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +140 W, cooler, +3.7 pp | | [AIKO AIKO-A790-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a790-grh78dw) | 790 W | +135 W, cooler, +3.5 pp | | [Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-760) | 760 W | +105 W, cooler, +3.4 pp | | [AIKO AIKO-A785-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a785-grh78dw) | 785 W | +130 W, cooler, +3.3 pp | --- Source: https://comparepv.com/panel/eging-pv-eg-655m66-hu-bf-dg Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.