--- title: "Vikram Solar HYPERSOL VSMDH.66.640.05 vs Vikram Solar HYPERSOL VSMDH.66.725.05 - Solar Panel Comparison | ComparePV" description: "Compare Vikram Solar HYPERSOL VSMDH.66.640.05 vs Vikram Solar HYPERSOL VSMDH.66.725.05 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/vikram-solar-hypersol-vsmdh-66-640-05/vikram-solar-hypersol-vsmdh-66-725-05" image: "https://comparepv.com/og/compare/panels/vikram-solar-hypersol-vsmdh-66-640-05/vikram-solar-hypersol-vsmdh-66-725-05.png" updated: 2026-10-23 --- # Vikram Solar HYPERSOL VSMDH.66.640.05 vs Vikram Solar HYPERSOL VSMDH.66.725.05 640.05 leads on the differences that matter The largest is rated power: 85 W more power. 11 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Vikram Solar HYPERSOL VSMDH.66.640.05](https://comparepv.com/panel/vikram-solar-hypersol-vsmdh-66-640-05) | [Vikram Solar HYPERSOL VSMDH.66.725.05](https://comparepv.com/panel/vikram-solar-hypersol-vsmdh-66-725-05) | | Manufacturer | Vikram Solar | Vikram Solar | | Power | 640 Wp | 725 Wp | | Efficiency | 23.69 % | 23.34 % | | Technology | N-type | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 640.05 | 725.05 | Difference | | --- | --- | --- | --- | | Rated power | 640 Wp | 725 Wp | +85 W for 725.05 | | Weight | 33.4 kg | 37.5 kg | -4.1 kg for 640.05 | | Module efficiency | 23.69 % | 23.34 % | +0.35 pp for 640.05 | | Short-circuit current | 16.16 A | 18.56 A | 2.40 A apart | | Module area | 2.701 m² | 3.106 m² | 0.405 m² apart | | Power density | 236.9 Wp/m² | 233.4 Wp/m² | +3.5 Wp/m² for 640.05 | | Current at max power | 15.25 A | 17.52 A | 2.27 A apart | | Dimensions | 2382x1134x30 mm | 2384x1303x33 mm | 2382x1134x30 mm vs 2384x1303x33 mm | ## Every compared parameter | Parameter | 640.05 | 725.05 | | --- | --- | --- | | Rated power | 640 Wp | 725 Wp | | Module efficiency | 23.69 % | 23.34 % | | Power density | 236.9 Wp/m² | 233.4 Wp/m² | | Open-circuit voltage | 49.90 V | 49.60 V | | Voltage at max power | 42.00 V | 41.40 V | | Short-circuit current | 16.16 A | 18.56 A | | Current at max power | 15.25 A | 17.52 A | | Temperature coefficient | -0.280 %/°C | -0.280 %/°C | | Dimensions | 2382x1134x30 mm | 2384x1303x33 mm | | Module area | 2.701 m² | 3.106 m² | | Weight | 33.4 kg | 37.5 kg | | Weight per kWp | 52.2 kg/kWp | 51.7 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | N-type | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, 640.05:** 21,473 kWh - **Cumulative output, 725.05:** 24,325 kWh - **Gap:** 2,852 kWh ## Output when hot | Condition | Cell temperature | 640.05 | 725.05 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 640 W | 725 W | 100.0% of rated power | | Cool, bright day | 40 °C | 613 W | 695 W | 95.8% of rated power | | Typical summer roof | 55 °C | 586 W | 664 W | 91.6% of rated power | | Hot roof | 70 °C | 559 W | 634 W | 87.4% of rated power | ## Against the whole database | Measure | 640.05 | 725.05 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #612 | #981 | 14,129 | 640.05 leads by 369 places | | Power density | #553 | #974 | 14,129 | 640.05 leads by 421 places | | Heat behaviour | #1,347 | #1,347 | 14,129 | Tied - the same position in the database | | Weight | #5,707 | #5,114 | 14,129 | 725.05 leads by 593 places | | Warranty | #21 | #21 | 14,129 | Tied - the same position in the database | | Overall | #1,555 | #402 | 14,129 | 725.05 leads by 1,153 places | ## Questions ### Which panel is better: Vikram Solar HYPERSOL VSMDH.66.640.05 or Vikram Solar HYPERSOL VSMDH.66.725.05? According to our database: **Vikram Solar HYPERSOL VSMDH.66.640.05** has higher module efficiency (**23.69%** vs **23.34%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Vikram Solar HYPERSOL VSMDH.66.640.05 and Vikram Solar HYPERSOL VSMDH.66.725.05? **Vikram Solar HYPERSOL VSMDH.66.640.05** has a module efficiency of **23.69%**, while **Vikram Solar HYPERSOL VSMDH.66.725.05** is **23.34%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Vikram Solar HYPERSOL VSMDH.66.640.05 use vs Vikram Solar HYPERSOL VSMDH.66.725.05? **Vikram Solar HYPERSOL VSMDH.66.640.05** uses **N-type** cells; **Vikram Solar HYPERSOL VSMDH.66.725.05** uses **N-type**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on Vikram Solar HYPERSOL VSMDH.66.640.05 and Vikram Solar HYPERSOL VSMDH.66.725.05? **Vikram Solar HYPERSOL VSMDH.66.640.05** has a **30 years** power warranty; **Vikram Solar HYPERSOL VSMDH.66.725.05** has a **30 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ### Are Vikram Solar HYPERSOL VSMDH.66.640.05 and Vikram Solar HYPERSOL VSMDH.66.725.05 bifacial panels? Both **Vikram Solar HYPERSOL VSMDH.66.640.05** and **Vikram Solar HYPERSOL VSMDH.66.725.05** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [Vikram Solar HYPERSOL VSMDH.66.640.05 vs Vikram Solar HYPERSOL VSMDH.66.730.05](https://comparepv.com/compare/vikram-solar-hypersol-vsmdh-66-640-05/vikram-solar-hypersol-vsmdh-66-730-05) - 6 differences, the largest is rated power - [Vikram Solar HYPERSOL VSMDH.66.640.05 vs Vikram Solar HYPERSOL VSMDH.66.AAA.05-720](https://comparepv.com/compare/vikram-solar-hypersol-vsmdh-66-640-05/vikram-solar-hypersol-vsmdh-66-aaa-05-720) - 9 differences, the largest is rated power - [Vikram Solar HYPERSOL VSMDH.66.640.05 vs Vikram Solar HYPERSOL VSMDH.66.720.05](https://comparepv.com/compare/vikram-solar-hypersol-vsmdh-66-640-05/vikram-solar-hypersol-vsmdh-66-720-05) - 8 differences, the largest is rated power - [Vikram Solar HYPERSOL VSMDH.66.640.05 vs Vikram Solar HYPERSOL VSMDH.66.715.05](https://comparepv.com/compare/vikram-solar-hypersol-vsmdh-66-640-05/vikram-solar-hypersol-vsmdh-66-715-05) - 9 differences, the largest is module efficiency - [Vikram Solar HYPERSOL VSMDH.66.640.05 vs Vikram Solar HYPERSOL VSMDH.66.AAA.05-715](https://comparepv.com/compare/vikram-solar-hypersol-vsmdh-66-640-05/vikram-solar-hypersol-vsmdh-66-aaa-05-715) - 10 differences, the largest is module efficiency - [Vikram Solar HYPERSOL VSMDH.66.640.05 vs Vikram Solar HYPERSOL VSMDH.66.710.05](https://comparepv.com/compare/vikram-solar-hypersol-vsmdh-66-640-05/vikram-solar-hypersol-vsmdh-66-710-05) - 9 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/vikram-solar-hypersol-vsmdh-66-640-05/vikram-solar-hypersol-vsmdh-66-725-05 Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.