--- title: "Adani Solar ASB-M12-132-640 vs Adani Solar ASM-M12-132-640 - Solar Panel Comparison | ComparePV" description: "Compare Adani Solar ASB-M12-132-640 vs Adani Solar ASM-M12-132-640 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/adani-solar-asb-m12-132-640/adani-solar-asm-m12-132-640" updated: 2026-09-12 --- # Adani Solar ASB-M12-132-640 vs Adani Solar ASM-M12-132-640 ASM-M12-132-640 leads on the differences that matter The largest is temperature coefficient: 0.010 %/°C better in heat. 17 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Adani Solar ASB-M12-132-640](https://comparepv.com/panel/adani-solar-asb-m12-132-640) | [Adani Solar ASM-M12-132-640](https://comparepv.com/panel/adani-solar-asm-m12-132-640) | | Manufacturer | Adani Solar | Adani Solar | | Power | 640 Wp | 640 Wp | | Efficiency | 20.55 % | 20.55 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | ASB-M12-132-640 | ASM-M12-132-640 | Difference | | --- | --- | --- | --- | | Temperature coefficient | -0.350 %/°C | -0.340 %/°C | +0.010 %/°C for ASM-M12-132-640 | | Bifacial | Yes | No | Yes vs No | ## Every compared parameter | Parameter | ASB-M12-132-640 | ASM-M12-132-640 | | --- | --- | --- | | Rated power | 640 Wp | 640 Wp | | Module efficiency | 20.55 % | 20.55 % | | Power density | 205.5 Wp/m² | 205.5 Wp/m² | | Open-circuit voltage | 43.28 V | 43.28 V | | Voltage at max power | 37.01 V | 37.01 V | | Short-circuit current | 18.69 A | 18.69 A | | Current at max power | 17.31 A | 17.31 A | | Temperature coefficient | -0.350 %/°C | -0.340 %/°C | | Dimensions | 2390x1303x35 mm | 2390x1303x35 mm | | Module area | 3.114 m² | 3.114 m² | | Weight | 33.6 kg | 33.6 kg | | Weight per kWp | 52.5 kg/kWp | 52.5 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.55 %/yr | 0.55 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | Bifacial | Yes | No | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, ASB-M12-132-640:** 20,742 kWh - **Cumulative output, ASM-M12-132-640:** 20,742 kWh - **Gap:** No difference ## Output when hot | Condition | Cell temperature | ASB-M12-132-640 | ASM-M12-132-640 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 640 W | 640 W | 100.0% of rated power | | Cool, bright day | 40 °C | 606 W | 607 W | 94.8% of rated power | | Typical summer roof | 55 °C | 573 W | 575 W | 89.5% of rated power | | Hot roof | 70 °C | 539 W | 542 W | 84.2% of rated power | ## Against the whole database | Measure | ASB-M12-132-640 | ASM-M12-132-640 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #11,208 | #11,208 | 14,005 | Tied - the same position in the database | | Power density | #11,191 | #11,191 | 14,005 | Tied - the same position in the database | | Heat behaviour | #10,419 | #8,778 | 14,005 | ASM-M12-132-640 leads by 1,641 places | | Weight | #6,043 | #6,043 | 14,005 | Tied - the same position in the database | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #4,636 | #4,636 | 14,005 | Tied - the same position in the database | ## Questions ### Which panel is better: Adani Solar ASB-M12-132-640 or Adani Solar ASM-M12-132-640? According to our database: **Adani Solar ASM-M12-132-640** tolerates heat better (temp coeff **-0.340%/°C** vs **-0.350%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Adani Solar ASB-M12-132-640 and Adani Solar ASM-M12-132-640? **Adani Solar ASB-M12-132-640** has a module efficiency of **20.55%**, while **Adani Solar ASM-M12-132-640** is **20.55%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Adani Solar ASB-M12-132-640 use vs Adani Solar ASM-M12-132-640? **Adani Solar ASB-M12-132-640** uses **PERC** cells; **Adani Solar ASM-M12-132-640** uses **PERC**. 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 Adani Solar ASB-M12-132-640 and Adani Solar ASM-M12-132-640? **Adani Solar ASB-M12-132-640** has a **30 years** power warranty; **Adani Solar ASM-M12-132-640** 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 Adani Solar ASB-M12-132-640 and Adani Solar ASM-M12-132-640 bifacial panels? **Adani Solar ASB-M12-132-640** is bifacial (captures light from both faces); **Adani Solar ASM-M12-132-640** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [Adani Solar ASB-M12-132-640 vs Adani Solar ASB-M12-132-650](https://comparepv.com/compare/adani-solar-asb-m12-132-640/adani-solar-asb-m12-132-650) - 3 differences, the largest is module efficiency - [Adani Solar ASB-M12-132-640 vs Adani Solar ASB-M12-132-645](https://comparepv.com/compare/adani-solar-asb-m12-132-640/adani-solar-asb-m12-132-645) - The same specification on paper - [Adani Solar ASB-M12-132-640 vs Adani Solar ASB-M12-132-635](https://comparepv.com/compare/adani-solar-asb-m12-132-640/adani-solar-asb-m12-132-635) - The same specification on paper - [Adani Solar ASB-M12-132-640 vs Adani Solar ASB-M12-132-630](https://comparepv.com/compare/adani-solar-asb-m12-132-640/adani-solar-asb-m12-132-630) - 3 differences, the largest is module efficiency - [Adani Solar ASM-M12-132-640 vs Adani Solar ASM-M12-132-650](https://comparepv.com/compare/adani-solar-asm-m12-132-640/adani-solar-asm-m12-132-650) - 3 differences, the largest is module efficiency - [Adani Solar ASM-M12-132-640 vs Adani Solar ASM-M12-132-645](https://comparepv.com/compare/adani-solar-asm-m12-132-640/adani-solar-asm-m12-132-645) - The same specification on paper --- Source: https://comparepv.com/compare/adani-solar-asb-m12-132-640/adani-solar-asm-m12-132-640 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.