--- title: "LEDVANCE M650~670P66UB-SF-F3 (665W class) 665W Solar Panel - Specs & Review | ComparePV" description: "LEDVANCE M650~670P66UB-SF-F3 (665W class) 665W solar panel. Specs: 21.40% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/ledvance-m650-670p66ub-sf-f3-665w-class" updated: 2026-09-11 --- # LEDVANCE M650~670P66UB-SF-F3 (665W class) Solid all-round for its segment 320 panels in the segment PERC 650-700 W ## Identity - **Manufacturer:** LEDVANCE - **Model:** M650~670P66UB-SF-F3 (665W class) - **Series:** M650~670P66UB-SF-F3 - **Rated power:** 665 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) | 665 W | 660 W | Typical | | | 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 (kg) | 38.3 kg | 34.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | 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 | - **Best for:** Commercial, utility-scale and residential. ## Specification ### Electrical - **Rated power (Pmax):** 665 W - **Efficiency:** 21.40 % - **Voltage at Pmax (Vmp):** 38.22 V - **Current at Pmax (Imp):** 17.40 A - **Open-circuit voltage (Voc):** 46.02 V - **Short-circuit current (Isc):** 18.45 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 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 38.3 kg - **Area:** 3.11 m2 - **Power density:** 214.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 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:** 565 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8323 of 14005 | | Power density | 8250 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 11303 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Bifacial PERC technology** - The modules use monocrystalline PERC cells in a bifacial configuration, capturing additional energy from reflected light on the rear side - beneficial for rooftops with light-colored surfaces or ground-mount installations with high albedo. - **Multi Bus Bar (MBB) design** - MBB reduces losses from microcracks and internal resistance while improving module behavior under partial shading, resulting in more stable energy yield in installations with uneven irradiance. - **30-year linear power warranty** - A 30-year power warranty combined with a 25-year product warranty exceeds typical market standards (usually 12-15 years product / 25 years power), reducing long-term degradation risk for the investment horizon. - **Original Stäubli MC4 EVO 2 connectors** - Use of certified Stäubli MC4 EVO 2 connectors (rather than cheaper substitutes) lowers the risk of DC connection failures and speeds up wiring on roofs or ground-mount structures, reducing installer labor time. - **Competitive efficiency of 20.92-21.56%** - Module efficiency is close to leading peer comparables (Hiwatt HW-M12/132H 21.6%, Techwise Summit Series 21.57%, Resun RS9H-M 21.57%), meaning no meaningful performance compromise despite the use of PERC rather than newer N-type cells. ## Cons - **No Tier-1 (BNEF) bankability status** - The manufacturer is not listed as bankable Tier-1 under BloombergNEF's methodology, which can complicate bank financing for large commercial projects (>10 MW) that require Tier-1 suppliers, despite solid technical module parameters. - **PERC cells instead of N-type TOPCon/HJT** - The series relies on older P-type PERC technology, while since 2024-2025 the market has shifted toward N-type cells (TOPCon, HJT) offering lower annual degradation and better high-temperature performance - by 2026, PERC is increasingly seen as legacy technology in the premium segment. ## About this series The LEDVANCE M650-670P66UB-SF-F3 series is designed for installations where maximizing yield from every square meter is crucial - delivering uncompromising durability. These modules are based on **monocrystalline PERC cells**, supported by **Multi Bus Bar (MBB) technology**, which enhances performance during partial shading and helps minimize losses resulting from micro-cracks and internal resistances. In practice, these panels address typical challenges in large-scale installations: uneven irradiation, high summer temperatures, and requirements for long operational life. The manufacturer highlights a **limited PID effect** thanks to quality control and low annual degradation, supporting stable energy production for years. An additional distinguishing feature are the **original Stäubli MC4 EVO 2 connectors** and the option for a version with a longer cable, facilitating work for installation teams and speeding up wiring on rooftops or ground structures. This is an excellent choice for companies, investors, and installers working on commercial, industrial, and modern residential projects where predictable yield and reliable installation are key. **High mechanical stress resistance** and the refined design help them compete where working conditions are demanding. ## Notable figures - At 21.4% efficiency, this panel is on par with typical \*\*PERC 650-700W\*\* modules - 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, this panel is 3.8 kg heavier than the \*\*PERC 650-700W\*\* median (34.5 kg) - more demanding for installation crews - In the top 59% for efficiency among all PERC panels ## Questions ### Are the LEDVANCE M650-670P66UB-SF-F3 panels bifacial, and how does that affect energy yield? Yes, the M650-670P66UB-SF-F3 series are bifacial modules built on monocrystalline PERC cells, generating power from both the front and rear surfaces. In ground-mount installations or on reflective surfaces such as concrete, gravel, or snow, the bifacial gain typically adds 5–15% more energy output compared to a standard monofacial panel of the same rated power. ### What warranty does the LEDVANCE M650-670P66UB-SF-F3 series carry? The series comes with a 25-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty. The 30-year power guarantee is among the longest available in the PV market, committing the manufacturer to maintaining a defined minimum percentage of the panel's rated output over three decades of operation. ### How does MBB technology improve the performance of the LEDVANCE M650-670P66UB-SF-F3 under partial shading? Multi Bus Bar (MBB) technology replaces a few wide busbars with multiple thin wires, shortening the current path across each cell. This reduces internal resistance losses and limits the impact of microcracks. Under partial shading conditions, MBB modules maintain higher output than conventional 3- or 4-busbar designs, and the technology also contributes to lower annual power degradation throughout the panel's service life. ### Are the Stäubli MC4 EVO 2 connectors on the M650-670P66UB-SF-F3 series compatible with standard inverters? Stäubli MC4 EVO 2 is one of the most widely used connector standards in PV installations and is compatible with the vast majority of inverters and power optimizers on the market. However, it is worth checking your inverter's documentation before installation, as some inverter manufacturers require their own-brand connectors to keep the device warranty valid. The series is also available in a longer cable version, simplifying wiring on large rooftops and ground-mount structures. ### What types of installations are the LEDVANCE M650-670P66UB-SF-F3 modules rated up to 670 Wp suited for? At up to 670 Wp, these large-format modules are primarily designed for commercial rooftop, industrial, and ground-mount solar farms where maximum power density and efficient wiring logistics matter most. They also fit modern residential installations with large, unobstructed roof sections. The manufacturer highlights high mechanical load resistance, making the series well-suited for demanding climatic conditions. ### Is LEDVANCE a Tier 1 manufacturer, and are the M650-670P66UB-SF-F3 panels still available? LEDVANCE is a German-headquartered manufacturer but is not listed in the Bloomberg NEF Tier 1 ranking. This does not imply poor quality — the brand uses MBB technology, monocrystalline PERC cells, limited PID effect controls, and original Stäubli MC4 EVO 2 connectors with a choice of cable length. The M650-670P66UB-SF-F3 series is not discontinued and remains available through authorized distributors. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/asset-13182826-m650-670p66ub-sf-f3-en-8a95ffcff849.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +3.8 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, lighter, +3.8 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, lighter, +3.6 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +3.6 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, lighter, +3.6 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, lighter, +3.5 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, lighter, +3.4 pp | | [LEDVANCE M650P66UM-BF-F3](https://comparepv.com/panel/ledvance-m650p66um-bf-f3) | 650 W | Lighter, -0.5 pp, -5 yr warranty | | [LEDVANCE M655P66UM-BF-F3](https://comparepv.com/panel/ledvance-m655p66um-bf-f3) | 655 W | Lighter, -0.3 pp, -5 yr warranty | | [LEDVANCE M660P66UM-BF-F3](https://comparepv.com/panel/ledvance-m660p66um-bf-f3) | 660 W | Lighter, -5 yr warranty | | [LEDVANCE M670P66UM-BF-F3](https://comparepv.com/panel/ledvance-m670p66um-bf-f3) | 670 W | Lighter, -5 yr warranty | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +140 W, cooler, +3.7 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +135 W, cooler, +3.5 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +130 W, cooler, +3.4 pp | | [AIKO AIKO-A790-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a790-grh78dw) | 790 W | +125 W, cooler, +3.2 pp | | [Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-760) | 760 W | +95 W, cooler, +3.1 pp | --- Source: https://comparepv.com/panel/ledvance-m650-670p66ub-sf-f3-665w-class Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.