--- title: "Axitec AC-620TGB/132TS vs Axitec AC-690TGB/132TS - Solar Panel Comparison | ComparePV" description: "Compare Axitec AC-620TGB/132TS vs Axitec AC-690TGB/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-620tgb-132ts/axitec-ac-690tgb-132ts" updated: 2026-09-11 --- # Axitec AC-620TGB/132TS vs Axitec AC-690TGB/132TS 620TGB/132TS leads on the differences that matter The largest is module efficiency: 0.74 pp more efficient. 9 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Axitec AC-620TGB/132TS](https://comparepv.com/panel/axitec-ac-620tgb-132ts) | [Axitec AC-690TGB/132TS](https://comparepv.com/panel/axitec-ac-690tgb-132ts) | | Manufacturer | Axitec | Axitec | | Power | 620 Wp | 690 Wp | | Efficiency | 22.95 % | 22.21 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 620TGB/132TS | 690TGB/132TS | Difference | | --- | --- | --- | --- | | Module efficiency | 22.95 % | 22.21 % | +0.74 pp for 620TGB/132TS | | Rated power | 620 Wp | 690 Wp | +70 W for 690TGB/132TS | | Weight | 32.5 kg | 38.0 kg | -5.5 kg for 620TGB/132TS | | Power density | 229.5 Wp/m² | 222.1 Wp/m² | +7.4 Wp/m² for 620TGB/132TS | | Short-circuit current | 16.24 A | 18.29 A | 2.05 A apart | | Module area | 2.701 m² | 3.106 m² | 0.405 m² apart | | Weight per kWp | 52.4 kg/kWp | 55.1 kg/kWp | -2.7 kg/kWp for 620TGB/132TS | | Current at max power | 15.27 A | 17.21 A | 1.94 A apart | | Dimensions | 2382x1134x30 mm | 2384x1303x35 mm | 2382x1134x30 mm vs 2384x1303x35 mm | ## Every compared parameter | Parameter | 620TGB/132TS | 690TGB/132TS | | --- | --- | --- | | Rated power | 620 Wp | 690 Wp | | Module efficiency | 22.95 % | 22.21 % | | Power density | 229.5 Wp/m² | 222.1 Wp/m² | | Open-circuit voltage | 48.32 V | 47.74 V | | Voltage at max power | 40.61 V | 40.10 V | | Short-circuit current | 16.24 A | 18.29 A | | Current at max power | 15.27 A | 17.21 A | | Temperature coefficient | -0.310 %/°C | -0.310 %/°C | | Dimensions | 2382x1134x30 mm | 2384x1303x35 mm | | Module area | 2.701 m² | 3.106 m² | | Weight | 32.5 kg | 38.0 kg | | Weight per kWp | 52.4 kg/kWp | 55.1 kg/kWp | | Product warranty | 30 yrs | 30 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | 0.40 %/yr | | 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, 620TGB/132TS:** 20,802 kWh - **Cumulative output, 690TGB/132TS:** 23,151 kWh - **Gap:** 2,349 kWh ## Output when hot | Condition | Cell temperature | 620TGB/132TS | 690TGB/132TS | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 620 W | 690 W | 100.0% of rated power | | Cool, bright day | 40 °C | 591 W | 658 W | 95.3% of rated power | | Typical summer roof | 55 °C | 562 W | 626 W | 90.7% of rated power | | Hot roof | 70 °C | 534 W | 594 W | 86.0% of rated power | ## Against the whole database | Measure | 620TGB/132TS | 690TGB/132TS | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,268 | #5,754 | 14,005 | 620TGB/132TS leads by 3,486 places | | Power density | #2,191 | #5,734 | 14,005 | 620TGB/132TS leads by 3,543 places | | Heat behaviour | #8,005 | #8,005 | 14,005 | Tied - the same position in the database | | Weight | #5,893 | #9,477 | 14,005 | 620TGB/132TS leads by 3,584 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #568 | #177 | 14,005 | 690TGB/132TS leads by 391 places | ## Questions ### Which panel is better: Axitec AC-620TGB/132TS or Axitec AC-690TGB/132TS? According to our database: **Axitec AC-620TGB/132TS** has higher module efficiency (**22.95%** vs **22.21%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Axitec AC-620TGB/132TS and Axitec AC-690TGB/132TS? **Axitec AC-620TGB/132TS** has a module efficiency of **22.95%**, while **Axitec AC-690TGB/132TS** is **22.21%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Axitec AC-620TGB/132TS use vs Axitec AC-690TGB/132TS? **Axitec AC-620TGB/132TS** uses **TOPCon** cells; **Axitec AC-690TGB/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-620TGB/132TS and Axitec AC-690TGB/132TS? **Axitec AC-620TGB/132TS** has a **30 years** power warranty; **Axitec AC-690TGB/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-620TGB/132TS and Axitec AC-690TGB/132TS bifacial panels? Both **Axitec AC-620TGB/132TS** and **Axitec AC-690TGB/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-620TGB/132TS vs Axitec AC-615TGB/132TS](https://comparepv.com/compare/axitec-ac-620tgb-132ts/axitec-ac-615tgb-132ts) - The same specification on paper - [Axitec AC-620TGB/132TS vs Axitec AC-610TGB/132TS](https://comparepv.com/compare/axitec-ac-620tgb-132ts/axitec-ac-610tgb-132ts) - 3 differences, the largest is module efficiency - [Axitec AC-620TGB/132TS vs Axitec AC-605TGB/132TS](https://comparepv.com/compare/axitec-ac-620tgb-132ts/axitec-ac-605tgb-132ts) - 3 differences, the largest is module efficiency - [Axitec AC-620TGB/132TS vs Axitec AC-600TGB/132TS](https://comparepv.com/compare/axitec-ac-620tgb-132ts/axitec-ac-600tgb-132ts) - 3 differences, the largest is module efficiency - [Axitec AC-690TGB/132TS vs Axitec AC-710TGB/132TS](https://comparepv.com/compare/axitec-ac-690tgb-132ts/axitec-ac-710tgb-132ts) - 3 differences, the largest is module efficiency - [Axitec AC-690TGB/132TS vs Axitec AC-705TGB/132TS](https://comparepv.com/compare/axitec-ac-690tgb-132ts/axitec-ac-705tgb-132ts) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/axitec-ac-620tgb-132ts/axitec-ac-690tgb-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.