--- title: "DMEGC GH540M10T-B66HST-C 540W Solar Panel - Specs & Review | ComparePV" description: "DMEGC GH540M10T-B66HST-C 540W solar panel. Specs: 22.74% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-gh540m10t-b66hst-c" updated: 2026-09-11 --- # DMEGC GH540M10T-B66HST-C Middle of its segment, heavy for its output 432 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** DMEGC - **Model:** GH540M10T-B66HST-C - **Series:** GHxxxM10T-B66HS - **Rated power:** 540 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 500-550 W (432 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 540 W | 510 W | Strong - top 6% | | | Module efficiency | 22.74% | 22.73% | Typical | 3,210 | | Power density | 227.4 | 227.4 | Typical | 3,201 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 30.0 kg | 27.0 kg | Weak - bottom 10% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.74% | 22.73% | Typical | 3,210 | | Power density | 227.4 | 227.4 | Typical | 3,201 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 55.6 | 52.4 | Weak - bottom 10% | 9,899 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **55.6 kg per kWp** - Bottom 10% of the TOPCon 500-550 W segment, against a median of 52.4. Ranked 9,899th in the whole database. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 540 W - **Efficiency:** 22.74 % - **Voltage at Pmax (Vmp):** 39.80 V - **Current at Pmax (Imp):** 13.57 A - **Open-circuit voltage (Voc):** 47.62 V - **Short-circuit current (Isc):** 14.34 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:** 2094 mm - **Width:** 1134 mm - **Thickness:** 25 mm - **Weight:** 30.0 kg - **Area:** 2.37 m2 - **Power density:** 227.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **Output after 30 years:** 472 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3210 of 14005 | | Power density | 3201 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 9899 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Premium-class efficiency: 22.53–23.16%** - The series delivers efficiency 1.2–1.9 percentage points higher than direct peer comparables (Goldi Solar GS10-B144-TF: 21.3%, IBC Solar 182M: 21.28%, S-Energy SL65-72BGJ: 21.3%), translating into meaningfully greater energy yield from the same roof area — particularly critical for rooftop installations where space is constrained. - **N-type TOPCon – low degradation rate** - TOPCon technology eliminates Light-Induced Degradation (LID) inherent to P-type PERC cells. DMEGC rates the annual degradation at 0.42%/year versus the industry-typical ~0.7%/year, resulting in retention of >87.4% of rated power after 30 years of operation. - **Bifacial double glass – durability and additional yield** - The dual tempered-glass construction eliminates the rear EVA backsheet susceptible to moisture ingress and yellowing, while enabling bifacial irradiance capture. In ground-mounted systems with high-albedo surfaces, bifaciality typically delivers a yield gain of 5–15% over monofacial modules at identical STC power ratings. - **30-year linear power warranty** - A 30-year power output warranty represents the current market maximum; peer comparables (Goldi Solar, IBC Solar, S-Energy) standardly offer 25 years. The extended warranty horizon directly reduces financial risk in bankability models for both commercial and prosumer installations. - **Tier-1 bankable – manufacturer stability** - DMEGC (Hengdian Group, founded 1980) is listed on Bloomberg NEF Tier-1 and EUPD Top Brand PV rankings, confirming the capacity to honor long-term warranties and enabling project bank financing. The manufacturer has been active in the photovoltaic market for over 40 years. ## Cons - **Series discontinued (EOL 2026)** - The GHxxxM10T-B66HS series reached end-of-life in 2026 (release date: 2022). This implies limited availability of replacement modules in the event of failure, difficulty expanding existing installations, and a practical technical support lifespan that may fall short of the nominal 30-year warranty period. - **Product warranty of only 15 years** - The 15-year product warranty falls below the standard currently offered by DMEGC for newer series — for example, the Infinity RT (2024–) carries a 25-year product warranty. The broader market trend in the premium TOPCon segment is moving toward 25–30 years, placing this series below the expectations of more demanding investors. ## About this series The DMEGC GHxxxM10T-B66HS panel series represents an advanced solution based on **N-type TOPCon technology**, which redefines efficiency standards in modern photovoltaics. The use of this innovation allows for significantly higher efficiency while maintaining excellent long-term parameter stability. A key distinguishing element of these modules is the **Bifacial Double Glass** construction, which, thanks to double-sided cell activity and double tempered glass, ensures maximum resistance to weather conditions and additional energy gain from reflected radiation. This solves the problem of limited installation space, offering more power from the same roof or ground area. Products from this series are characterized by a **low degradation rate** and exceptional efficiency in low-light conditions, making them an ideal choice for the Polish climate. This is an offer aimed at the most demanding private investors and companies looking for **aesthetics combined with maximum durability**. Unlike standard solutions, this series minimizes transmission losses and offers **better thermal stability**, which translates into real savings and a faster return on investment in all weather conditions. ## Notable figures - Efficiency of 22.7% matches the \*\*TOPCon 500-550W\*\* median - Power density of 227.4 W/m² matches the \*\*TOPCon 500-550W\*\* median - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 500-550W\*\* median - At 30.0 kg, this panel is 3.0 kg heavier than the \*\*TOPCon 500-550W\*\* median (27.0 kg) - more demanding for installation crews - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### Is the DMEGC GHxxxM10T-B66HS series still available for purchase? The DMEGC GHxxxM10T-B66HS series has been discontinued and is no longer available as new stock through regular distribution channels. It may still be possible to source individual units from distributors with remaining inventory. If you require the same N-type TOPCon bifacial double-glass technology, it is worth contacting your dealer to inquire about the current successor model in the DMEGC portfolio with comparable specifications. ### What warranty is offered on the DMEGC GHxxxM10T-B66HS panels? The manufacturer provides a 15-year product warranty covering material and workmanship defects. In addition, a 30-year linear power output warranty applies, guaranteeing that the module maintains a defined minimum performance level over three decades of operation. A power warranty of this length is standard for premium-class modules built on N-type TOPCon technology and is one of the key justifications for the higher upfront cost. ### What does Bifacial Double Glass mean in the DMEGC GHxxxM10T-B66HS panels, and does it actually generate more energy? Bifacial means the cells absorb light from both the front and rear surfaces of the module. The rear side captures irradiance reflected from the ground, rooftop, or other underlying surface, which in practice can increase energy yield by several to over ten percent depending on the albedo of the surface beneath the array. Double Glass — two tempered glass panes instead of a polymer backsheet — protects the module against moisture ingress, ammonia exposure, and mechanical stress, extending the operational lifetime of the installation. ### Is the 550 W DMEGC GHxxxM10T-B66HS panel suitable for a pitched roof installation in the Polish climate? Yes, the 550 W modules in this series can be installed on pitched roofs using standard aluminum racking systems. N-type TOPCon technology is characterized by high efficiency under low-irradiance conditions and at low temperatures, which is particularly relevant in Poland during the overcast autumn and winter months. It is advisable to verify that the roof structure can support the weight of the Double Glass enclosure, which is somewhat heavier than modules with a conventional polymer backsheet. ### How does the TOPCon technology used in the DMEGC GHxxxM10T-B66HS differ from older PERC panels? TOPCon cells are N-type devices featuring a thinner carrier recombination layer, which reduces energy losses as heat. Compared to the widely used P-type PERC cells, they deliver higher module efficiency, a lower first-year degradation rate, and better performance retention at elevated operating temperatures. For the system owner, this translates into more kilowatt-hours generated from the same roof area and a longer period over which the module maintains its rated power output. ### Is DMEGC a reliable manufacturer, and can I be confident in the quality of the GHxxxM10T-B66HS panels? DMEGC Solar appears on the Tier 1 module manufacturer lists published by independent industry analysts, which reflects the company's financial stability and its demonstrated capacity to honor warranty obligations. The company is headquartered in China and is one of the significant global suppliers of photovoltaic modules. The GHxxxM10T-B66HS series has passed standard certification testing. It should be noted that Tier 1 status is not a product quality certification in itself, but it does indicate that the manufacturer has operated in the market long enough and with sufficient stability to be considered a credible counterparty for long-term warranty commitments. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/670a084cafbc3-592f0dc8ef37.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +2.3 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | -45 W, lighter, +2.1 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +2.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +2.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +1.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | -50 W, lighter, +1.8 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +1.8 pp | | [DMEGC GH350M10T-B44HST-C](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-gh350m10t-b44hst-c) | 350 W | -190 W, lighter, -8.0 pp | | [DMEGC GH355M10T-B44HST-C](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-gh355m10t-b44hst-c) | 355 W | -185 W, lighter, -7.8 pp | | [DMEGC GH360M10T-B44HST-C](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-gh360m10t-b44hst-c) | 360 W | -180 W, lighter, -7.6 pp | | [DMEGC GH365M10T-B44HST-C](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-gh365m10t-b44hst-c) | 365 W | -175 W, lighter, -7.4 pp | | [DMEGC GH535M10T-B66HSW-C](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-gh535m10t-b66hsw-c) | 535 W | -0.2 pp | | [DMEGC GH545M10T-B66HST-C](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-gh545m10t-b66hst-c) | 545 W | +0.2 pp | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +50 W, lighter, +1.1 pp | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +45 W, lighter, +0.9 pp | | [Bisol BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 W | +40 W, lighter, +0.8 pp | --- Source: https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-gh540m10t-b66hst-c 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.