--- title: "Avaada AVN66G12RG-615 vs Avaada AVN66G12RG-620 - Solar Panel Comparison | ComparePV" description: "Compare Avaada AVN66G12RG-615 vs Avaada AVN66G12RG-620 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/avaada-avn66g12rg-615/avaada-avn66g12rg-620" updated: 2026-09-11 --- # Avaada AVN66G12RG-615 vs Avaada AVN66G12RG-620 620 leads on the differences that matter The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Avaada AVN66G12RG-615](https://comparepv.com/panel/avaada-avn66g12rg-615) | [Avaada AVN66G12RG-620](https://comparepv.com/panel/avaada-avn66g12rg-620) | | Manufacturer | Avaada | Avaada | | Power | 615 Wp | 620 Wp | | Efficiency | 22.80 % | 23.00 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 615 | 620 | Difference | | --- | --- | --- | --- | | Module efficiency | 22.80 % | 23.00 % | +0.20 pp for 620 | ## Every compared parameter | Parameter | 615 | 620 | | --- | --- | --- | | Rated power | 615 Wp | 620 Wp | | Module efficiency | 22.80 % | 23.00 % | | Power density | 227.7 Wp/m² | 229.5 Wp/m² | | Open-circuit voltage | 48.00 V | 48.20 V | | Voltage at max power | 41.05 V | 41.25 V | | Short-circuit current | 15.90 A | 15.95 A | | Current at max power | 14.99 A | 15.04 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 2382x1134x35 mm | 2382x1134x35 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 34.0 kg | 34.0 kg | | Weight per kWp | 55.3 kg/kWp | 54.8 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | 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 (-0.300 %/°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, 615:** 20,634 kWh - **Cumulative output, 620:** 20,802 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | 615 | 620 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 615 W | 620 W | 100.0% of rated power | | Cool, bright day | 40 °C | 587 W | 592 W | 95.5% of rated power | | Typical summer roof | 55 °C | 560 W | 564 W | 91.0% of rated power | | Hot roof | 70 °C | 532 W | 536 W | 86.5% of rated power | ## Against the whole database | Measure | 615 | 620 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,714 | #1,919 | 14,005 | 620 leads by 795 places | | Power density | #3,077 | #2,191 | 14,005 | 620 leads by 886 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #9,727 | #9,232 | 14,005 | 620 leads by 495 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,921 | #2,549 | 14,005 | 620 leads by 372 places | ## Questions ### Which panel is better: Avaada AVN66G12RG-615 or Avaada AVN66G12RG-620? According to our database: **Avaada AVN66G12RG-620** has higher module efficiency (**23.00%** vs **22.80%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Avaada AVN66G12RG-615 and Avaada AVN66G12RG-620? **Avaada AVN66G12RG-615** has a module efficiency of **22.80%**, while **Avaada AVN66G12RG-620** is **23.00%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Avaada AVN66G12RG-615 use vs Avaada AVN66G12RG-620? **Avaada AVN66G12RG-615** uses **TOPCon** cells; **Avaada AVN66G12RG-620** uses **TOPCon**. 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 Avaada AVN66G12RG-615 and Avaada AVN66G12RG-620? **Avaada AVN66G12RG-615** has a **30 years** power warranty; **Avaada AVN66G12RG-620** 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 Avaada AVN66G12RG-615 and Avaada AVN66G12RG-620 bifacial panels? Both **Avaada AVN66G12RG-615** and **Avaada AVN66G12RG-620** 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 - [Avaada AVN66G12RG-615 vs Avaada AVN66G12G](https://comparepv.com/compare/avaada-avn66g12rg-615/avaada-avn66g12g) - 10 differences, the largest is rated power - [Avaada AVN66G12RG-615 vs Avaada AVN66G12TB](https://comparepv.com/compare/avaada-avn66g12rg-615/avaada-avn66g12tb) - 10 differences, the largest is rated power - [Avaada AVN66G12RG-615 vs Avaada AVN66G12RG-630](https://comparepv.com/compare/avaada-avn66g12rg-615/avaada-avn66g12rg-630) - 3 differences, the largest is module efficiency - [Avaada AVN66G12RG-615 vs Avaada AVN66G12RTB](https://comparepv.com/compare/avaada-avn66g12rg-615/avaada-avn66g12rtb) - 3 differences, the largest is module efficiency - [Avaada AVN66G12RG-615 vs Avaada AVN66G12RG-625](https://comparepv.com/compare/avaada-avn66g12rg-615/avaada-avn66g12rg-625) - 3 differences, the largest is module efficiency - [Avaada AVN66G12RG-615 vs Avaada AVN66G12RG-610](https://comparepv.com/compare/avaada-avn66g12rg-615/avaada-avn66g12rg-610) - One difference: module efficiency --- Source: https://comparepv.com/compare/avaada-avn66g12rg-615/avaada-avn66g12rg-620 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.