--- title: "LEDVANCE M655P66UM-BF-F3 655W Solar Panel - Specs & Review | ComparePV" description: "LEDVANCE M655P66UM-BF-F3 655W solar panel. Specs: 21.08% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ledvance-m655p66um-bf-f3" updated: 2026-09-11 --- # LEDVANCE M655P66UM-BF-F3 Light for its output, modest efficiency 320 panels in the segment PERC 650-700 W ## Identity - **Manufacturer:** LEDVANCE - **Model:** M655P66UM-BF-F3 - **Series:** M650~670P66UM-BF-F3 - **Rated power:** 655 W - **Cell technology:** PERC ## 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) | 32.9 kg | 34.5 kg | Strong - top 18% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 21% | 9,798 | ### 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 | 50.2 | 52.3 | Strong - top 18% | 3,676 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 21% | 9,798 | ### Strengths - **50.2 kg per kWp** - Top 18% of the PERC 650-700 W segment, against a median of 52.3. ### Watch out for - **21.08% module efficiency** - Bottom 17% of the PERC 650-700 W segment, against a median of 21.25%. - **25 year performance warranty** - Bottom 21% of the PERC 650-700 W segment, against a median of 30 yrs. - **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:** Tight roof space, owners who want a long output guarantee and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 655 W - **Efficiency:** 21.08 % - **Voltage at Pmax (Vmp):** 37.67 V - **Current at Pmax (Imp):** 17.39 A - **Open-circuit voltage (Voc):** 45.49 V - **Short-circuit current (Isc):** 18.44 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 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 32.9 kg - **Area:** 3.11 m2 - **Power density:** 210.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 537 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9586 of 14005 | | Power density | 9459 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 3676 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Efficiency on par with segment leaders** - Peak efficiency of 21.56% is essentially in line with the leading comparable PERC series on the market (Hiwatt HW-M12/132H 21.6%, Techwise Summit 21.57%, Resun RS9H-M 21.57%), showing that despite using mature PERC cell technology the manufacturer reaches close to the ceiling achievable in this cell class. - **Low power temperature coefficient** - The Pmax temperature coefficient is -0.34%/°C, which is favorable for installations in hot climates - the module loses less power at operating temperatures above 25°C than typical PERC panels with coefficients around -0.37 to -0.40%/°C. - **Multi-busbar (MBB) cell technology** - The use of multi-busbar (MBB) interconnection improves current collection across the cell surface and increases mechanical resistance to microcracks, which in practice reduces the risk of degradation from transport, installation, or snow load. - **25-year power warranty to 84.8%** - The manufacturer guarantees at least 84.8% of nominal power retained after 25 years of operation, which is the industry standard for PERC modules and allows for predictable energy yield modeling over the full project lifetime. ## Cons - **Series discontinued in 2025** - Released in 2023, the series was discontinued in 2025. This means limited availability for expanding or supplementing existing installations, and potential difficulties with warranty service in future years, despite the formally applicable 25-year power warranty. - **Manufacturer not on the BNEF Tier 1 list** - LEDVANCE (founded in 2016, headquartered in Germany) does not appear on BloombergNEF's quarterly Tier 1 list, unlike brands such as Jinko, Trina, or JA Solar. This can complicate securing bank financing for larger commercial projects, where Tier 1 status is a common lender requirement. - **PERC technology instead of N-type TOPCon/HJT** - PERC is an older-generation cell technology - since 2024/2025 the industry has largely shifted toward N-type TOPCon and HJT, which offer lower LID/LeTID degradation and better high-temperature performance. While current efficiency is competitive among PERC panels, the series does not match the latest N-type modules already available in the same power range. - **12-year product warranty below market trend** - Many newer premium series (including N-type modules) now offer 15 or even 20-25 years of product warranty, while this series remains at the standard 12 years, which can be significant when comparing total cost of risk (TCO) over the long term. ## About this series The LEDVANCE M650-660P66UM-BF-F3 series are modules designed to maximize energy yield where every square meter of installation counts. Key advantages include the **double-sided construction** - the panel operates not only from the front but can also utilize reflected light from the ground, resulting in tangible gains, especially on white membrane roofs, gravel grounds, or installations with appropriately spaced modules. In practice, this series addresses common challenges in large-scale installations: **better performance at high temperatures and slower aging** help maintain stable production for years to come, while **reduced PID effect** supports safe operation in demanding grid conditions. The application of multi-string MBB technology improves current collection from cells and increases resistance to micro-cracking during daily use. This is an excellent choice for PV farms, commercial and industrial installations, and projects where **long-term reliability** and predictable yield are prioritized over catalog parameters. ## Notable figures - Efficiency of 21.1% matches the \*\*PERC 650-700W\*\* median - Power density of 210.9 W/m² matches the \*\*PERC 650-700W\*\* median - Temperature coefficient of -0.34%/°C matches the \*\*PERC 650-700W\*\* median - Weight of 32.9 kg (1.6 kg below \*\*PERC 650-700W\*\* median of 34.5 kg) allows easier transport and roof mounting - In the top 68% for efficiency among all PERC panels ## Questions ### Is the LEDVANCE M650~670P66UM-BF-F3 series still available for purchase? The LEDVANCE M650~670P66UM-BF-F3 series has been discontinued and is no longer actively distributed by the manufacturer. If you specifically need this series, check remaining stock with solar distributors. For new installations, we recommend considering current models with comparable specifications to ensure long-term technical support and parts availability. ### What warranty does the LEDVANCE M650~670P66UM-BF-F3 series come with? LEDVANCE provides a 12-year product warranty covering material and workmanship defects, plus a 25-year linear power warranty guaranteeing at least 84.8% of rated output. These are standard commercial-grade terms that allow investors to build a reliable financial model across a two-decade investment horizon. ### What does the BF designation in the LEDVANCE M650~670P66UM-BF-F3 name mean, and does bifaciality actually improve energy yield? BF stands for bifacial — the module harvests light from both the front side and the rear side, capturing irradiance reflected off the ground surface. Real-world gains depend on the albedo beneath the array; white roofing membranes, light gravel, or snow deliver the best results. Under optimal conditions, bifaciality can boost energy yield by several to over ten percent. ### How do LEDVANCE M650~670P66UM-BF-F3 modules perform in high summer temperatures? The temperature coefficient of Pmax is -0.34%/°C, meaning the panel loses 0.34% of rated power for every degree Celsius above 25°C. This is one of the better figures for PERC technology. In Central European climates the effect on annual yield is noticeable, but the coefficient becomes especially critical for large-scale PV farms located in warmer European regions. ### What type of installations are the LEDVANCE M650~670P66UM-BF-F3 panels best suited for? At up to 670 Wp per module and dimensions of 2384×1303 mm, these panels are designed for utility-scale PV farms, commercial rooftops, and industrial installations. High unit power reduces the module count needed for a given capacity, directly lowering BoS costs (cabling, racking, labor). At 32.9 kg, the size and weight make them impractical for standard residential pitched roofs. ### What benefit does MBB technology provide in the LEDVANCE M650~670P66UM-BF-F3 series? MBB (Multi Busbar) technology replaces the conventional 3–4 wide busbars with 9–12 narrow ones. The shorter current path to each busbar reduces resistive losses and improves cell efficiency. An equally important advantage is greater resilience to microcracks — damage near one busbar has a smaller impact on overall module output, supporting better long-term reliability in the field. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/asset-13182827-m650-670p66um-bf-f3-en-8516ef929426.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, +4.1 pp, +5 yr warranty | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, +3.9 pp, +5 yr warranty | | [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 | Cooler, +3.9 pp, +5 yr warranty | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, +3.8 pp, +5 yr warranty | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, +3.7 pp, +5 yr warranty | | [LEDVANCE M650P66UM-BF-F3](https://comparepv.com/panel/ledvance-m650p66um-bf-f3) | 650 W | Very close match | | [LEDVANCE M660P66UM-BF-F3](https://comparepv.com/panel/ledvance-m660p66um-bf-f3) | 660 W | Very close match | | [LEDVANCE M665P66UM-BF-F3](https://comparepv.com/panel/ledvance-m665p66um-bf-f3) | 665 W | +10 W, +0.3 pp | | [LEDVANCE M670P66UM-BF-F3](https://comparepv.com/panel/ledvance-m670p66um-bf-f3) | 670 W | +15 W, +0.5 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 | --- Source: https://comparepv.com/panel/ledvance-m655p66um-bf-f3 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.