--- title: "Vikram Solar HYPERSOL VSMDH.66.640.05 640W Solar Panel - Specs & Review | ComparePV" description: "Vikram Solar HYPERSOL VSMDH.66.640.05 640W solar panel. Specs: 23.69% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/vikram-solar-hypersol-vsmdh-66-640-05" updated: 2026-09-11 --- # Vikram Solar HYPERSOL VSMDH.66.640.05 Space saver, no clear weak spot 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** Vikram Solar - **Model:** HYPERSOL VSMDH.66.640.05 - **Series:** HYPERSOL VSMDH.66 - **Rated power:** 640 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) | 640 W | 620 W | Strong - top 9% | | | Module efficiency | 23.69% | 22.80% | Strong - top 5% | 580 | | Power density | 236.9 | 227.7 | Strong - top 4% | 521 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 32.1 kg | 32.7 kg | Strong - top 20% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.69% | 22.80% | Strong - top 5% | 580 | | Power density | 236.9 | 227.7 | Strong - top 4% | 521 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 50.2 | 53.1 | Strong - top 20% | 3,653 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **236.9 watts per square metre** - Top 4% of the TOPCon 600-650 W segment, against a median of 227.7. Ranked 521st in the whole database. - **23.69% module efficiency** - Top 5% of the TOPCon 600-650 W segment, against a median of 22.80%. Ranked 580th in the whole database. - **50.2 kg per kWp** - Top 20% of the TOPCon 600-650 W segment, against a median of 53.1. - **Best for:** Utility-scale, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 640 W - **Efficiency:** 23.69 % - **Voltage at Pmax (Vmp):** 42.00 V - **Current at Pmax (Imp):** 15.25 A - **Open-circuit voltage (Voc):** 49.90 V - **Short-circuit current (Isc):** 16.16 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:** 0.040 %/degC - **NOCT:** 45 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:** 32.1 kg - **Area:** 2.70 m2 - **Power density:** 236.9 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:** 559 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 580 of 14005 | | Power density | 521 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 3653 of 14005 | | Warranty | 21 of 14005 | ## About this series The HYPERSOL VSMDH.66 series represents Vikram Solar's next-generation photovoltaic modules built on the rectangular G12R wafer format. Instead of conventional square cells, the manufacturer relies on **N-Type TOPCon cells** in a **half-cut** configuration, which reduces resistive losses and improves module performance under partial shading - a common issue on roofs with complex geometry. The series' defining feature, however, is its **bifacial design**, allowing the module to capture additional energy from light reflected off the surrounding surface, making it particularly well suited for ground-mount installations, light-colored roofs, and elevated racking systems. The G12R format combined with a higher cell count delivers strong unit power output while keeping module dimensions close to standard panels, simplifying system design and lowering BoS costs. The HYPERSOL VSMDH.66 series targets both commercial investors and utility-scale developers seeking high energy yield and a lower LCOE over the module's operating lifetime. The panels come with a **30-year product warranty** and hold IEC, UL, and BIS certifications, confirming their reliability across international markets. ## Notable figures - At 23.7% efficiency, this panel is 0.9pp above typical \*\*TOPCon 600-650W\*\* modules (median: 22.8%) - 236.9 W/m² power density - 9.2 W/m² more than \*\*TOPCon 600-650W\*\* median (227.7 W/m²), more power per roof area - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 600-650W\*\* median - 75% bifaciality enables rear-side power generation, boosting yield by 4-11% on reflective surfaces - In the top 4% for efficiency among all TOPCon panels ## Questions ### Are Vikram Solar HYPERSOL VSMDH.66 panels suitable for ground-mounted installations? Yes, this is one of the series' primary use cases. The bifacial design allows the module to capture light reflected off the ground surface, making HYPERSOL VSMDH.66 panels particularly well suited to solar farms, high-albedo surfaces (gravel, white roofing), and elevated mounting structures where the rear side has clear exposure to reflected sunlight. ### What warranty comes with Vikram Solar HYPERSOL VSMDH.66 panels? The manufacturer provides a 12-year product warranty and a 30-year linear power output warranty, standard for modern N-Type TOPCon modules. The panels hold IEC, UL, and BIS certifications, confirming compliance with international quality and safety standards - relevant for both commercial investments and utility-scale installations. ### What is TOPCon cell technology used in HYPERSOL VSMDH.66, and how does it differ from PERC? TOPCon (Tunnel Oxide Passivated Contact) is an N-Type cell technology that reduces recombination losses through an additional passivating layer on the cell's rear side. Compared to older PERC cells, it delivers higher efficiency, lower annual degradation, and better performance at high temperatures and low irradiance, resulting in higher annual energy yield. ### Will HYPERSOL VSMDH.66 panels perform well on a complex roof with partial shading? Yes, thanks to half-cut cell technology, each cell is split in two, reducing resistive losses and limiting how much a shaded section of the panel affects the entire module's output. This design lowers the impact of shading from chimneys, antennas, or nearby buildings on total system energy production. ### How much extra energy does the bifacial design of the HYPERSOL VSMDH.66 generate? The bifacial energy gain depends on installation conditions - ground albedo, mounting height, and tilt angle. In practice, with a high-albedo surface and adequate mounting height, this type of module can achieve an additional energy gain of roughly ten to twenty percent compared to a monofacial module of the same rated power, meaningfully lowering LCOE over the system's lifetime. ### Is Vikram Solar a Tier 1 manufacturer, and where are HYPERSOL VSMDH.66 panels produced? Yes, Vikram Solar is classified as a Tier 1 manufacturer, headquartered in India. Tier 1 status reflects financial stability and a well-documented, multi-year track record of large-scale module supply, which matters when assessing project bankability and long-term availability of warranty service. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/UL-G12R-a3f206442c2c.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +1.5 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +40 W, lighter, +1.5 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +35 W, lighter, +1.3 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +1.3 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +30 W, lighter, +1.1 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +30 W, lighter, +1.1 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +1.1 pp | | [Vikram Solar HYPERSOL VSMDH.66.610.05](https://comparepv.com/panel/vikram-solar-hypersol-vsmdh-66-610-05) | 610 W | -30 W, -1.1 pp | | [Vikram Solar HYPERSOL VSMDH.66.615.05](https://comparepv.com/panel/vikram-solar-hypersol-vsmdh-66-615-05) | 615 W | -25 W, -0.9 pp | | [Vikram Solar HYPERSOL VSMDH.66.620.05](https://comparepv.com/panel/vikram-solar-hypersol-vsmdh-66-620-05) | 620 W | -20 W, -0.7 pp | | [Vikram Solar HYPERSOL VSMDH.66.625.05](https://comparepv.com/panel/vikram-solar-hypersol-vsmdh-66-625-05) | 625 W | -15 W, -0.6 pp | | [Vikram Solar HYPERSOL VSMDH.66.630.05](https://comparepv.com/panel/vikram-solar-hypersol-vsmdh-66-630-05) | 630 W | -10 W, -0.4 pp | | [Vikram Solar HYPERSOL VSMDH.66.635.05](https://comparepv.com/panel/vikram-solar-hypersol-vsmdh-66-635-05) | 635 W | Very close match | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +60 W, cooler, +1.3 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +55 W, cooler, +1.2 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +30 W, cooler, +1.1 pp | --- Source: https://comparepv.com/panel/vikram-solar-hypersol-vsmdh-66-640-05 Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.