--- title: "Yingli LF705M12N-66H/BF 705W Solar Panel - Specs & Review | ComparePV" description: "Yingli LF705M12N-66H/BF 705W solar panel. Specs: 22.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/yingli-lf705m12n-66h-bf" updated: 2026-09-11 --- # Yingli LF705M12N-66H/BF Solid all-round for its segment 90 panels in the segment N-type 700-750 W ## Identity - **Manufacturer:** Yingli - **Model:** LF705M12N-66H/BF - **Series:** LF720M12N-66H/BF - **Rated power:** 705 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 700-750 W (90 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 705 W | 710 W | Typical | | | Module efficiency | 22.70% | 22.88% | Typical | 3,307 | | Power density | 227.0 | 228.6 | Typical | 3,361 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 38.0 kg | 38.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.70% | 22.88% | Typical | 3,307 | | Power density | 227.0 | 228.6 | Typical | 3,361 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 53.9 | 53.5 | Typical | 8,027 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Utility-scale, shaded-installations and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 705 W - **Efficiency:** 22.70 % - **Voltage at Pmax (Vmp):** 39.53 V - **Current at Pmax (Imp):** 17.83 A - **Open-circuit voltage (Voc):** 47.45 V - **Short-circuit current (Isc):** 18.99 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 132 - **Bifacial:** yes - **Bifacial gain:** 20.00 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 33 mm - **Weight:** 38.0 kg - **Area:** 3.11 m2 - **Power density:** 227.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 616 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3307 of 14005 | | Power density | 3361 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 8027 of 14005 | | Warranty | 21 of 14005 | ## About this series The Yingli LF720M12N-66H/BF photovoltaic panel series sets new performance standards in the professional sector through the use of advanced **N-type TOPCon cell technology**. The use of large M12 silicon wafers combined with bifacial architecture allows for achieving powerful unit output, which realistically reduces balance of system (BOS) costs in the construction of large power plants. This solution effectively solves the problem of limited installation space by generating significantly more energy from the same area compared to standard modules. A key advantage is the **high bifaciality factor**, which, combined with N-type cells, guarantees excellent yields even in low sunlight or high light diffusion conditions. Thanks to **minimized LID and LeTID degradation**, investors gain assurance of long-term stability of electrical parameters throughout the entire service life. The design based on half-cut technology effectively reduces internal losses and improves resistance to micro-cracks, which clearly distinguishes these panels from less advanced competition. This series is primarily dedicated to investors implementing solar farms and large-scale commercial projects, where maximizing profit is the priority. Additionally, a **more favorable temperature coefficient** ensures that the modules maintain peak efficiency even on hot days, which is crucial for optimizing energy production in changing climatic conditions. ## Notable figures - At 22.7% efficiency, this panel is on par with typical \*\*N-type 700-750W\*\* modules - At 226.9 W/m² power density, roof space requirements are typical for \*\*N-type 700-750W\*\* panels - Temperature coefficient of -0.29%/°C matches the \*\*N-type 700-750W\*\* median - Ranked #3307 out of 14005 panels for efficiency in the database ## Questions ### What is the actual power output of the Yingli LF720M12N-66H/BF panels and how is it achieved? This series reaches a maximum power output of 720 Wp thanks to the combination of large M12 silicon wafers with N-type TOPCon cell technology and a half-cut cell layout (66 half-cut cells). This design reduces current and resistive losses, delivering more energy per module than classic PERC panels of similar dimensions, which lowers installation cost per watt of power. ### Does the bifacial LF720M12N-66H/BF panel require special mounting? Yes, to fully exploit the bifacial gain, the panel should ideally be installed on elevated racking or trackers with a reflective surface underneath, such as white gravel or a light-colored roof. Standard mounting on a dark roof still works, but the rear-side energy gain will be lower. The manufacturer recommends elevated mounting structures for ground-mounted solar farms, where the bifacial benefit is greatest. ### What warranty applies to the Yingli LF720M12N-66H/BF panels? The series comes with a 12-year product warranty and a 30-year linear power output warranty. This means the manufacturer guarantees a minimum power level even after 30 years of operation, which is standard for top-tier N-type panels and confirms high long-term electrical stability thanks to minimized LID and LeTID degradation. ### Do LF720M12N-66H/BF panels perform well in high summer temperatures? Yes, thanks to N-type TOPCon cell technology these panels have a more favorable temperature coefficient than standard P-type modules. This means a smaller power drop as cell temperature rises above 25°C, which matters in summer when roof- or ground-mounted panels can heat up to 60-70°C. In practice this translates to higher energy yield on hot, sunny days. ### Which installations best suit the Yingli LF720M12N-66H/BF series - residential rooftops or utility-scale solar farms? Given its high unit power of 720 Wp and large module dimensions typical of M12 wafers, this series is primarily designed for solar farms and large commercial or industrial installations, where minimizing the number of modules and BOS costs is the priority. For an average single-family home, the panel may be too large and heavy, making smaller residential modules a better fit. ### Is Yingli a trustworthy, safe manufacturer to choose for solar panels? Yingli is a China-based manufacturer classified as Tier 1, meaning it has an established financial and production track record, regularly audited by independent banking institutions. The LF720M12N-66H/BF series remains in active production and is fully available for purchase, which also simplifies warranty servicing and access to technical documentation when needed. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/lf700-720m12n-66h-bf-2384-1303-33-8d63cc08298a.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, lighter, +2.5 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | -30 W, lighter, +2.3 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, lighter, +2.3 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, lighter, +2.2 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | -35 W, lighter, +2.1 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | -35 W, lighter, +2.1 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | -35 W, lighter, +2.1 pp | | [Yingli YL645DF66 f/2](https://comparepv.com/panel/yingli-yl645df66-f-2) | 645 W | -60 W, hotter, -1.9 pp | | [Yingli YL650DF66 f/2](https://comparepv.com/panel/yingli-yl650df66-f-2) | 650 W | -55 W, hotter, -1.8 pp | | [Yingli YL655DF66 f/2](https://comparepv.com/panel/yingli-yl655df66-f-2) | 655 W | -50 W, hotter, -1.6 pp | | [Yingli YL660D-45f 1/2](https://comparepv.com/panel/yingli-yl660d-45f-1-2) | 660 W | Hotter, -1.5 pp, -5 yr warranty | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +100 W, cooler, +2.4 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +95 W, cooler, +2.2 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +90 W, cooler, +2.1 pp | | [AIKO AIKO-A790-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a790-grh78dw) | 790 W | +85 W, cooler, +1.9 pp | | [Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-760) | 760 W | +55 W, cooler, +1.8 pp | --- Source: https://comparepv.com/panel/yingli-lf705m12n-66h-bf 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.