--- title: "Talesun TM7G54M/420W 420W Solar Panel - Specs & Review | ComparePV" description: "Talesun TM7G54M/420W 420W solar panel. Specs: 21.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/talesun-tm7g54m-420w" updated: 2026-09-11 --- # Talesun TM7G54M/420W Middle of its segment, heavy for its output 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Talesun - **Model:** TM7G54M/420W - **Series:** TM7G54M (BIPRO) - **Rated power:** 420 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 420 W | 435 W | Weak - bottom 16% | | | Module efficiency | 21.50% | 22.00% | Weak - bottom 17% | 7,958 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 24.5 kg | 22.0 kg | Weak - bottom 8% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.50% | 22.00% | Weak - bottom 17% | 7,958 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 58.3 | 51.4 | Weak - bottom 8% | 11,670 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **58.3 kg per kWp** - Bottom 8% of the TOPCon 400-450 W segment, against a median of 51.4. Ranked 11,670th in the whole database. - **21.50% module efficiency** - Bottom 17% of the TOPCon 400-450 W segment, against a median of 22.00%. - **215.1 watts per square metre** - Bottom 19% of the TOPCon 400-450 W segment, against a median of 220.2. - **Best for:** Residential and commercial. - **Not ideal for:** Weight-limited structures, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 420 W - **Efficiency:** 21.50 % - **Voltage at Pmax (Vmp):** 32.42 V - **Current at Pmax (Imp):** 12.96 A - **Open-circuit voltage (Voc):** 38.70 V - **Short-circuit current (Isc):** 13.57 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:** 108 - **Bifacial:** yes ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 24.5 kg - **Area:** 1.95 m2 - **Power density:** 215.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 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:** 367 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7958 of 14005 | | Power density | 7882 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 11670 of 14005 | | Warranty | 21 of 14005 | ## About this series Talesun™ TM7G54M (BIPRO) are bifacial modules designed for maximum energy yield where every square meter of roof or structure counts. The application of N-type TOPCon cells helps minimize typical power losses over time and maintains high production even after many seasons of operation. Thanks to bifacial technology, the module actively utilizes reflected light from the ground-real advantage on light-colored roofs, carports, geotextile or gravel-covered ground, and also in vertical installations. The dual glass construction is noteworthy, increasing resistance to moisture, dust, and demanding environmental conditions, while also facilitating stable operation in locations subjected to loads and variable temperatures. Built-in Anti-PID solutions and a sealed connector box support long-term reliability. TM7G54M (BIPRO) is an excellent choice for premium homes, businesses, and PV farms that want to reduce LCOE without compromising on durability and aesthetics. ## Notable figures - Efficiency of 21.5% matches the \*\*TOPCon 400-450W\*\* median - At 215.1 W/m², this panel generates 5.1 W/m² less per unit area than \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 400-450W\*\* panels - Weight of 24.5 kg is 2.5 kg above \*\*TOPCon 400-450W\*\* median (22.0 kg) - verify structural support - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### How does the bifacial technology in Talesun TM7G54M (BIPRO) panels differ from standard monofacial panels? TM7G54M (BIPRO) panels generate power from both sides of the module - the front side works like a standard panel, while the rear side additionally captures light reflected from the surrounding surface (roof, gravel, geotextile, or light-colored ground). This delivers a real energy yield gain without increasing installation area, especially noticeable on bright roofs, carports, or in vertical mounting. The dual glass construction also protects the rear cells, enabling this bifacial gain. ### What warranty comes with Talesun TM7G54M (BIPRO) panels and what does it cover? The manufacturer provides a 15-year product warranty and a 30-year power performance warranty, guaranteeing around 84.8% of nominal power after that period. Talesun is a Tier 1 manufacturer, meaning strong financial stability and a realistic chance of honoring warranty terms over the full period. Annual power degradation is low - up to 1% in the first year and about 0.4% per year afterward. ### What is the maximum power of the TM7G54M (BIPRO) panel and what installations is it suited for? The series reaches up to 440 Wp of maximum power using 108 N-type TOPCon half-cut cells with 16BB busbar technology. Combining high power output, bifacial gain, and a robust dual glass construction, the panel works well for premium residential homes as well as commercial and utility-scale PV farms, where maximizing yield from available roof or ground area is the priority. ### Do Talesun TM7G54M (BIPRO) panels require reinforced roof mounting because of the dual glass construction? The panel weighs about 24.5 kg at dimensions of 1722x1134x30 mm, somewhat more than backsheet modules, which should be factored into roof load calculations. However, it's rated to withstand up to 5400 Pa of snow load and 2400 Pa of wind load, so standard roof and ground-mount racking systems with clamps designed for glass-glass modules are fully suitable, as long as the extra weight is accounted for in the design. ### Do TM7G54M (BIPRO) panels perform well in hot summer conditions on the roof? Yes. The panel has a power temperature coefficient of -0.29%/°C, which is better (lower) than many older cell technologies. This means smaller power losses as modules heat up on hot days. This is thanks to the N-type TOPCon cells, which are less sensitive to high temperatures than classic P-type PERC cells, resulting in more stable energy production during summer. ### Do Talesun TM7G54M (BIPRO) panels have protection against PID? Yes, the modules have passed a 192-hour Anti-PID resistance test and include protection against Potential Induced Degradation. This matters especially in larger installations with high system voltage, where PID can cause permanent and hard-to-reverse power loss in the modules over time. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/bipro-tm7g54m-16bb-20240410-en-fc91f218a026.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-465w-class) | 465 W | +45 W, lighter, +2.3 pp | | [Luxor Solar LX-465M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-465m-182r-96-gg) | 465 W | +45 W, cooler, +2.3 pp | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | +50 W, +2.2 pp, +10 yr warranty | | [AIKO AIKO-A470-MAH54Mb](https://comparepv.com/panel/aiko-aiko-a470-mah54mb) | 470 W | +50 W, lighter, +2.1 pp | | [AIKO AIKO-A460-MAH54Mb](https://comparepv.com/panel/aiko-shenzhen-aiko-digital-energy-technology-co-ltd-aiko-a460-mah54mb-1) | 460 W | +40 W, lighter, +2.1 pp | | [TCL Zhonghuan HSM-BD54-LA470](https://comparepv.com/panel/tcl-zhonghuan-hsm-bd54-la470) | 470 W | +50 W, lighter, +2.1 pp | | [Talesun TP7F54M-390W](https://comparepv.com/panel/talesun-tp7f54m-390w) | 390 W | Hotter, -1.5 pp, -5 yr warranty | | [Talesun TP7F54M-395W](https://comparepv.com/panel/talesun-tp7f54m-395w) | 395 W | Hotter, -1.3 pp, -5 yr warranty | | [Talesun TP7F54M-400W](https://comparepv.com/panel/talesun-tp7f54m-400w) | 400 W | Hotter, -1.0 pp, -5 yr warranty | | [Talesun TP7F54M-405W](https://comparepv.com/panel/talesun-tp7f54m-405w) | 405 W | Hotter, -0.8 pp, -5 yr warranty | | [Talesun TP7G54M/410W](https://comparepv.com/panel/talesun-tp7g54m-410w) | 410 W | Hotter, lighter, -5 yr warranty | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +75 W, lighter, +3.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +85 W, cooler, +3.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +70 W, lighter, +3.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +80 W, cooler, +3.0 pp | --- Source: https://comparepv.com/panel/talesun-tm7g54m-420w 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.