--- title: "Talesun TM3G66M-600 600W Solar Panel - Specs & Review | ComparePV" description: "Talesun TM3G66M-600 600W solar panel. Specs: 22.20% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/talesun-tm3g66m-600" updated: 2026-09-11 --- # Talesun TM3G66M-600 Middle of its segment, heavy for its output 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** Talesun - **Model:** TM3G66M-600 - **Series:** TM3G66M (BIPRO) - **Rated power:** 600 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 600-650 W (1086 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 600 W | 620 W | Weak - bottom 5% | | | Module efficiency | 22.20% | 22.80% | Weak - bottom 12% | 5,817 | | Power density | 222.1 | 227.7 | Weak - bottom 13% | 5,783 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 33.7 kg | 32.7 kg | Weak - bottom 5% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.20% | 22.80% | Weak - bottom 12% | 5,817 | | Power density | 222.1 | 227.7 | Weak - bottom 13% | 5,783 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 56.2 | 53.1 | Weak - bottom 5% | 10,451 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **56.2 kg per kWp** - Bottom 5% of the TOPCon 600-650 W segment, against a median of 53.1. Ranked 10,451st in the whole database. - **22.20% module efficiency** - Bottom 12% of the TOPCon 600-650 W segment, against a median of 22.80%. - **222.1 watts per square metre** - Bottom 13% of the TOPCon 600-650 W segment, against a median of 227.7. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Weight-limited structures, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 600 W - **Efficiency:** 22.20 % - **Voltage at Pmax (Vmp):** 40.30 V - **Current at Pmax (Imp):** 14.91 A - **Open-circuit voltage (Voc):** 48.40 V - **Short-circuit current (Isc):** 15.80 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.043 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 132 - **Bifacial:** yes ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 33.7 kg - **Area:** 2.70 m2 - **Power density:** 222.1 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:** 524 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 5817 of 14005 | | Power density | 5783 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 10451 of 14005 | | Warranty | 21 of 14005 | ## About this series Talesun TM3G66M (BIPRO) are bifacial glass-glass modules designed for maximum energy yield where every square meter counts. Their unique combination of **N-type TOPCon cell technology** and **bifaciality** allows them to harness not only direct light but also reflections from the ground - effectively boosting production in ground-mounted installations, on light-colored rooftops, and carport structures. The application of **half-cut with 16BB** minimizes internal losses and helps maintain stable performance under weaker sunlight, which is crucial given Poland's weather conditions. The glass-glass construction enhances resistance to environmental factors, while **high PID resistance** supports long-term reliability in demanding installations. TM3G66M (BIPRO) is an excellent choice for PV farms, large industrial rooftops, and projects focused on low energy costs over the entire life cycle. ## Notable figures - Efficiency of 22.2% is 0.6pp below the \*\*TOPCon 600-650W\*\* median (22.8%) - 222.1 W/m² power density is 5.6 W/m² below \*\*TOPCon 600-650W\*\* median (227.7 W/m²) - requires larger installation area - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 600-650W\*\* median - Weight of 33.7 kg is typical for \*\*TOPCon 600-650W\*\* panels - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### How does N-type TOPCon technology in Talesun TM3G66M panels differ from older PERC cells? N-type TOPCon cells have a lower degradation rate over time and are less susceptible to LID and LeTID compared to conventional P-type PERC cells. This gives the TM3G66M higher efficiency (up to 605 Wp) and better power retention throughout its lifespan, resulting in higher and more stable energy output over 25-30 years. ### Are Talesun TM3G66M (BIPRO) panels suitable for a residential roof, or only for large-scale installations? The glass-glass construction makes these panels heavier than standard glass-backsheet modules, so roof load capacity should be checked before installation. The series performs best on PV farms, industrial roofs with light-colored surfaces, and carport structures, where bifaciality delivers a real energy gain. On a typical residential pitched roof, the benefit from bifaciality tends to be marginal. ### What warranty comes with Talesun TM3G66M (BIPRO) panels, and is Talesun a Tier 1 manufacturer? The manufacturer provides a 12-year product warranty and a 30-year power output warranty. Talesun is classified as a Tier 1 manufacturer, meaning stable financial standing and extensive manufacturing experience, which reduces the risk of warranty claim issues down the line. ### How much extra energy does bifaciality add in the TM3G66M series? The rear-side energy gain depends on ground albedo, mounting height, and distance from the ground. On light gravel, a white roof membrane, or in carport installations, you can expect a few to over ten percent more energy compared to a monofacial panel of the same power rating. On a dark roof or when mounted close to the surface, the effect will be much smaller. ### How does the half-cut design with 16 busbars affect panel performance under low light and cold temperatures? Splitting cells into half-cut segments lowers the current flowing through the interconnects, reducing resistive losses and cell heating, while 16 busbars improve current collection across the cell surface. In practice, this means better performance under cloudy skies, early morning, and late afternoon, and cold winter temperatures increase operating voltage, further supporting stable energy production. ### Does high PID resistance in TM3G66M panels matter for large-scale PV farm installations? Yes, large installations often run high string voltages, which increases the risk of potential induced degradation (PID) and permanent power loss. The TM3G66M series' enhanced PID resistance mitigates this risk, which is especially important on PV farms and industrial-scale projects, where even a small power drop across many panels has a real impact on energy revenue. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/bipro-tm3g66m-16bb-20240322-en-de795f06818e.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +50 W, lighter, +3.0 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +45 W, lighter, +2.8 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -40 W, lighter, +2.6 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +40 W, lighter, +2.6 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -45 W, lighter, +2.4 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +35 W, lighter, +2.4 pp | | [Talesun TM3G66M-605](https://comparepv.com/panel/talesun-tm3g66m-605) | 605 W | Very close match | | [Talesun TM9G72M-610W](https://comparepv.com/panel/talesun-tm9g72m-610w) | 610 W | +10 W, +0.4 pp | | [Talesun TM9G72M-615W](https://comparepv.com/panel/talesun-tm9g72m-615w) | 615 W | +15 W, +0.6 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +80 W, lighter, +3.0 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +75 W, lighter, +2.8 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +100 W, cooler, +2.8 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +95 W, cooler, +2.7 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +70 W, lighter, +2.6 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +70 W, lighter, +2.6 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +70 W, cooler, +2.6 pp | --- Source: https://comparepv.com/panel/talesun-tm3g66m-600 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.