--- title: "DMEGC DM635G12RT-B66HSW 635W Solar Panel - Specs & Review | ComparePV" description: "DMEGC DM635G12RT-B66HSW 635W solar panel. Specs: 23.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dm635g12rt-b66hsw" updated: 2026-10-06 --- # DMEGC DM635G12RT-B66HSW Space saver, no clear weak spot 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** DMEGC - **Model:** DM635G12RT-B66HSW - **Series:** DMxxxG12RT-B66HSW (INFINITY RT) - **Rated power:** 635 W - **Cell technology:** TOPCon - **Bifacial:** yes ## Price offers Prices are the figure each shop printed, on that shop's side of VAT. | Shop | Market | Price | Per kWp | Availability | Last read | | --- | --- | --- | --- | --- | --- | | [AZ Solar Shop](https://comparepv.com/go/538597) | Italy | | | Not stated | Last read 6 Oct 02:14 | ## How it compares Compared against segment TOPCon 600-650 W (1086 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 635 W | 620 W | Strong - top 16% | | | Module efficiency | 23.50% | 22.80% | Strong - top 10% | 716 | | Power density | 235.1 | 227.7 | Strong - top 9% | 741 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 32.3 kg | 32.7 kg | Strong - top 24% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.50% | 22.80% | Strong - top 10% | 716 | | Power density | 235.1 | 227.7 | Strong - top 9% | 741 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 50.9 | 53.1 | Strong - top 24% | 4,252 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **235.1 watts per square metre** - Top 9% of the TOPCon 600-650 W segment, against a median of 227.7. Ranked 741st in the whole database. - **23.50% module efficiency** - Top 10% of the TOPCon 600-650 W segment, against a median of 22.80%. Ranked 716th in the whole database. - **50.9 kg per kWp** - Top 24% of the TOPCon 600-650 W segment, against a median of 53.1. - **Best for:** Commercial, utility-scale and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 635 W - **Efficiency:** 23.50 % - **Voltage at Pmax (Vmp):** 41.45 V - **Current at Pmax (Imp):** 15.35 A - **Open-circuit voltage (Voc):** 49.69 V - **Short-circuit current (Isc):** 16.29 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:** 0.048 %/degC - **NOCT:** 42 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:** 32.3 kg - **Area:** 2.70 m2 - **Power density:** 235.1 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:** 555 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 716 of 14005 | | Power density | 741 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 4252 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Up to 23.5% Efficiency – Top of the Segment** - The maximum efficiency of 23.5% places the series on par with the LONGi Hi-MO X10 (23.5%) and just below the Jinko Tiger Neo (23.51%), while outperforming the Talesun BIPRO (22.72%) by 0.78 percentage points. For space-constrained installations, this translates directly into higher energy yield per square meter. - **Low Temperature Coefficient: -0.29%/°C** - The manufacturer's datasheet specifies -0.29%/°C (Pmax), and an independent PV Magazine test measured -0.276%, placing the series among the top-performing TOPCon modules. In the Polish climate, where module temperatures regularly exceed 50°C in summer, a 0.1 percentage point advantage in temperature coefficient over weaker PERC modules (approx. -0.35%/°C) can translate into 1–2% higher daily energy yield on hot days. - **Degradation ≤0.4%/year + 30-Year Warranty** - The manufacturer guarantees first-year degradation of ≤1% and annual degradation of ≤0.4% over 30 years, backed by a 15-year product warranty. Standard offerings in the segment (e.g., Talesun) rely on 25-year warranties with higher degradation rates; the 30-year horizon with a linear power warranty reduces LCOE and simplifies project financing. - **Kiwa PVEL Top Performer – 4 Consecutive Years** - DMEGC Solar has earned the Top Performer distinction in the Kiwa PVEL PV Module Reliability Scorecard for the fourth consecutive year (editions 2022–2025). Kiwa PVEL is one of the few independent laboratories that tests long-term module durability, and this multi-year consistency confirms the manufacturing process stability of the Infinity RT series. - **BNEF Tier 1 (Q3 2025) + PV Magazine Rating** - DMEGC Solar maintains Tier 1 status in the BloombergNEF ranking (confirmed Q3 2025), ensuring project bankability for non-recourse financing. In addition, the Infinity RT series received a five-star "Very Good" rating from PV Magazine in independent testing, further supporting the credibility of the manufacturer's claims. ## Cons - **Module Weight ~32.3 kg (Double-Glass)** - The double-glass construction with two 2 mm tempered glass panes results in a module weight of ~32.3 kg – approximately 4–5 kg more than comparable single-glass modules in this power class (e.g., the Jinko Tiger Neo 66HL4M in glass-backsheet configuration weighs approx. 28.5 kg). For rooftop installations, this requires structural load capacity verification and may increase installation costs due to more demanding panel handling. ## About this series The DMEGC DMxXXG12RT-B66HSW (INFINITY RT) series comprises bifacial N-type TOPCon modules engineered to maximize energy yield in real-world operating conditions-including diffuse light and lower temperatures. The use of high-efficiency cells, along with optimized glass optics and tailored film layers, translates to stable energy production throughout the day and improved utilization of limited peak irradiance periods. Compared to many panels in its competitive segment, this series excels in long-term durability: the double-glass construction enhances resistance to environmental factors, while high PID resistance ensures sustained performance over time. Thanks to lower degradation rates and refined thermal performance, energy yield and project economics can be more reliably predicted over multiple years. This is an excellent choice for large-scale PV farms and commercial & industrial (C&I) projects, where higher bifacial yield and mechanical load security-even in challenging climates-are critical. For investors, it means more energy generated from the same footprint and predictable results without compromising on quality. ## Notable figures - 23.5% module efficiency - 0.7pp better than the \*\*TOPCon 600-650W\*\* median of 22.8% - Power density of 235.1 W/m² packs 7.4 W/m² more into the same footprint vs \*\*TOPCon 600-650W\*\* median (227.7 W/m²) - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 600-650W\*\* median - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof - In the top 5% for efficiency among all TOPCon panels ## Questions ### What warranty coverage applies to DMEGC INFINITY RT panels (DMxxxG12RT-B66HSW)? The DMEGC INFINITY RT series comes with a 15-year product warranty and a 30-year linear power output warranty. First-year degradation does not exceed 1%, with subsequent annual degradation capped at 0.4%. This places the series among the top performers in the N-type TOPCon segment in terms of long-term durability, directly supporting predictable energy yield projections over the full design lifetime of the installation. ### What does the bifacial design of DMEGC INFINITY RT panels mean in practice, and does it actually increase energy yield? DMEGC INFINITY RT modules are bifacial with a bifaciality factor of approximately 80%, meaning the rear side of the module captures irradiance reflected from the ground surface and converts it into additional electricity. In real-world conditions — ground-mounted systems with light-colored substrates or rooftop installations with reflective membranes — energy yield gains of several to more than ten percent over standard monofacial panels are achievable. The effect is most pronounced on utility-scale PV farms where rear-side irradiance can be optimized through elevated mounting and appropriate albedo management. ### Are DMEGC INFINITY RT panels suitable for industrial rooftop systems and utility-scale PV farms? Yes, the DMxxxG12RT-B66HSW series, with rated power output up to 635 Wp, is designed primarily for large-scale C&I and utility-scale PV applications. The modules measure 2382×1134×30 mm and feature a double-glass construction that enhances mechanical resistance under snow and wind load conditions. The high conversion efficiency of the N-type TOPCon cells — exceeding 22% — allows more energy to be harvested from the same land area compared to lower-efficiency alternatives. ### How do DMEGC INFINITY RT panels perform in winter and under overcast conditions? The INFINITY RT series is optimized for performance in diffuse light conditions and at lower operating temperatures. N-type TOPCon technology offers a favorable temperature coefficient, meaning the modules lose less power on hot days while also making more effective use of short irradiance windows during winter months. The enhanced optical properties of the front glass further improve irradiance absorption at low solar angles, which is particularly beneficial at higher latitudes during winter. ### How does the TOPCon technology used in DMEGC INFINITY RT differ from older PERC panels? TOPCon (Tunnel Oxide Passivated Contact) N-type cells achieve higher conversion efficiency than standard PERC cells and exhibit significantly lower light-induced degradation (LID/LeTID). In the DMEGC INFINITY RT series, this translates to annual degradation below 0.4%, compared to the typical 0.45–0.55% seen in PERC modules. N-type TOPCon cells also demonstrate superior PID (Potential Induced Degradation) resistance, which is especially important in large string configurations where higher system voltages increase PID risk. ### Is DMEGC a Tier 1 manufacturer, and what does that mean for the buyer? Yes, DMEGC Solar appears on the Tier 1 manufacturer lists published by leading PV industry rating agencies. Tier 1 status indicates that the manufacturer meets the financial and production criteria required by banks financing large-scale photovoltaic projects. For buyers, this provides assurance that both the product warranty and the power output warranty are backed by a financially stable company, and that the modules have undergone rigorous quality control processes consistent with bankability requirements. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/67650c83c4ba6-23bd691e001d.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +1.7 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +45 W, lighter, +1.7 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +40 W, lighter, +1.5 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +1.5 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +35 W, lighter, +1.3 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +35 W, lighter, +1.3 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +1.3 pp | | [DMEGC DM605G12RT-B66HSW](https://comparepv.com/panel/dmegc-dm605g12rt-b66hsw) | 605 W | -30 W, -1.1 pp | | [DMEGC DM610G12RT-B66HSW](https://comparepv.com/panel/dmegc-dm610g12rt-b66hsw) | 610 W | -25 W, -0.9 pp | | [DMEGC DM615G12RT-B66HSW](https://comparepv.com/panel/dmegc-dm615g12rt-b66hsw) | 615 W | -20 W, -0.7 pp | | [DMEGC DM620G12RT-B66HSW](https://comparepv.com/panel/dmegc-dm620g12rt-b66hsw) | 620 W | -15 W, -0.5 pp | | [DMEGC DM625G12RT-B66HSW](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dm625g12rt-b66hsw) | 625 W | -10 W, -0.4 pp | | [DMEGC DM630G12RT-B66HSW](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dm630g12rt-b66hsw) | 630 W | Very close match | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +65 W, cooler, +1.5 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +60 W, cooler, +1.4 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, cooler, +1.3 pp | --- Source: https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dm635g12rt-b66hsw 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.