--- title: "Axitec AC-615TGB/132TS vs Axitec AC-620TGB/132TS - Solar Panel Comparison | ComparePV" description: "Compare Axitec AC-615TGB/132TS vs Axitec AC-620TGB/132TS side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/axitec-ac-615tgb-132ts/axitec-ac-620tgb-132ts" updated: 2026-09-11 --- # Axitec AC-615TGB/132TS vs Axitec AC-620TGB/132TS Identical on every published parameter All 18 comparable parameters agree, with 1 more left out because at least one datasheet does not publish it. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Axitec AC-615TGB/132TS](https://comparepv.com/panel/axitec-ac-615tgb-132ts) | [Axitec AC-620TGB/132TS](https://comparepv.com/panel/axitec-ac-620tgb-132ts) | | Manufacturer | Axitec | Axitec | | Power | 615 Wp | 620 Wp | | Efficiency | 22.77 % | 22.95 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | 615TGB/132TS | 620TGB/132TS | | --- | --- | --- | | Rated power | 615 Wp | 620 Wp | | Module efficiency | 22.77 % | 22.95 % | | Power density | 227.7 Wp/m² | 229.5 Wp/m² | | Open-circuit voltage | 48.10 V | 48.32 V | | Voltage at max power | 40.42 V | 40.61 V | | Short-circuit current | 16.19 A | 16.24 A | | Current at max power | 15.22 A | 15.27 A | | Temperature coefficient | -0.310 %/°C | -0.310 %/°C | | Dimensions | 2382x1134x30 mm | 2382x1134x30 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 32.5 kg | 32.5 kg | | Weight per kWp | 52.8 kg/kWp | 52.4 kg/kWp | | Product warranty | 30 yrs | 30 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | - | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.310 %/°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, 615TGB/132TS:** 20,634 kWh - **Cumulative output, 620TGB/132TS:** 20,802 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | 615TGB/132TS | 620TGB/132TS | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 615 W | 620 W | 100.0% of rated power | | Cool, bright day | 40 °C | 586 W | 591 W | 95.3% of rated power | | Typical summer roof | 55 °C | 558 W | 562 W | 90.7% of rated power | | Hot roof | 70 °C | 529 W | 534 W | 86.0% of rated power | ## Against the whole database | Measure | 615TGB/132TS | 620TGB/132TS | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #3,073 | #2,268 | 14,005 | 620TGB/132TS leads by 805 places | | Power density | #3,077 | #2,191 | 14,005 | 620TGB/132TS leads by 886 places | | Heat behaviour | #8,005 | #8,005 | 14,005 | Tied - the same position in the database | | Weight | #6,546 | #5,893 | 14,005 | 620TGB/132TS leads by 653 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #725 | #568 | 14,005 | 620TGB/132TS leads by 157 places | ## Questions ### Which panel is better: Axitec AC-615TGB/132TS or Axitec AC-620TGB/132TS? According to our database: **Axitec AC-620TGB/132TS** has higher module efficiency (**22.95%** vs **22.77%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Axitec AC-615TGB/132TS and Axitec AC-620TGB/132TS? **Axitec AC-615TGB/132TS** has a module efficiency of **22.77%**, while **Axitec AC-620TGB/132TS** is **22.95%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Axitec AC-615TGB/132TS use vs Axitec AC-620TGB/132TS? **Axitec AC-615TGB/132TS** uses **TOPCon** cells; **Axitec AC-620TGB/132TS** 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 Axitec AC-615TGB/132TS and Axitec AC-620TGB/132TS? **Axitec AC-615TGB/132TS** has a **30 years** power warranty; **Axitec AC-620TGB/132TS** 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 Axitec AC-615TGB/132TS and Axitec AC-620TGB/132TS bifacial panels? Both **Axitec AC-615TGB/132TS** and **Axitec AC-620TGB/132TS** 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 - [Axitec AC-615TGB/132TS vs Axitec AC-610TGB/132TS](https://comparepv.com/compare/axitec-ac-615tgb-132ts/axitec-ac-610tgb-132ts) - The same specification on paper - [Axitec AC-615TGB/132TS vs Axitec AC-605TGB/132TS](https://comparepv.com/compare/axitec-ac-615tgb-132ts/axitec-ac-605tgb-132ts) - 3 differences, the largest is module efficiency - [Axitec AC-615TGB/132TS vs Axitec AC-600TGB/132TS](https://comparepv.com/compare/axitec-ac-615tgb-132ts/axitec-ac-600tgb-132ts) - 3 differences, the largest is module efficiency - [Axitec AC-615TGB/132TS vs Axitec AC-710TGB/132TS](https://comparepv.com/compare/axitec-ac-615tgb-132ts/axitec-ac-710tgb-132ts) - 6 differences, the largest is rated power - [Axitec AC-615TGB/132TS vs Axitec AC-705TGB/132TS](https://comparepv.com/compare/axitec-ac-615tgb-132ts/axitec-ac-705tgb-132ts) - 6 differences, the largest is rated power - [Axitec AC-615TGB/132TS vs Axitec AC-700TGB/132TS](https://comparepv.com/compare/axitec-ac-615tgb-132ts/axitec-ac-700tgb-132ts) - 7 differences, the largest is rated power --- Source: https://comparepv.com/compare/axitec-ac-615tgb-132ts/axitec-ac-620tgb-132ts 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.