--- title: "Sunova TS-BGT66(705)-G12 vs Sunova TS-BWT66(710)-G12 - Solar Panel Comparison | ComparePV" description: "Compare Sunova TS-BGT66(705)-G12 vs Sunova TS-BWT66(710)-G12 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/sunova-ts-bgt66-705-g12/sunova-ts-bwt66-710-g12" updated: 2026-09-11 --- # Sunova TS-BGT66(705)-G12 vs Sunova TS-BWT66(710)-G12 BWT66(710)-G12 leads on the differences that matter The largest is weight: 3.9 kg lighter. 12 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Sunova TS-BGT66(705)-G12](https://comparepv.com/panel/sunova-ts-bgt66-705-g12) | [Sunova TS-BWT66(710)-G12](https://comparepv.com/panel/sunova-ts-bwt66-710-g12) | | Manufacturer | Sunova | Sunova | | Power | 705 Wp | 710 Wp | | Efficiency | 22.70 % | 22.90 % | | Technology | N-type | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | BGT66(705)-G12 | BWT66(710)-G12 | Difference | | --- | --- | --- | --- | | Weight | 37.8 kg | 33.9 kg | -3.9 kg for BWT66(710)-G12 | | Weight per kWp | 53.6 kg/kWp | 47.7 kg/kWp | -5.9 kg/kWp for BWT66(710)-G12 | | Temperature coefficient | -0.300 %/°C | -0.290 %/°C | +0.010 %/°C for BWT66(710)-G12 | | Cell technology | N-type | TOPCon | N-type vs TOPCon | | Module efficiency | 22.70 % | 22.90 % | +0.20 pp for BWT66(710)-G12 | | Open-circuit voltage | 48.80 V | 46.63 V | 2.17 V apart | | Short-circuit current | 18.36 A | 18.86 A | 0.50 A apart | ## Every compared parameter | Parameter | BGT66(705)-G12 | BWT66(710)-G12 | | --- | --- | --- | | Rated power | 705 Wp | 710 Wp | | Module efficiency | 22.70 % | 22.90 % | | Power density | 227.0 Wp/m² | 228.6 Wp/m² | | Open-circuit voltage | 48.80 V | 46.63 V | | Voltage at max power | 40.70 V | 40.14 V | | Short-circuit current | 18.36 A | 18.86 A | | Current at max power | 17.33 A | 17.69 A | | Temperature coefficient | -0.300 %/°C | -0.290 %/°C | | Dimensions | 2384x1303x35 mm | 2384x1303x35 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 37.8 kg | 33.9 kg | | Weight per kWp | 53.6 kg/kWp | 47.7 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | N-type | 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 - **Cumulative output, BGT66(705)-G12:** 23,654 kWh - **Cumulative output, BWT66(710)-G12:** 23,822 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | BGT66(705)-G12 | BWT66(710)-G12 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 705 W | 710 W | 100.0% of rated power | | Cool, bright day | 40 °C | 673 W | 679 W | 95.5% of rated power | | Typical summer roof | 55 °C | 642 W | 648 W | 91.0% of rated power | | Hot roof | 70 °C | 610 W | 617 W | 86.5% of rated power | ## Against the whole database | Measure | BGT66(705)-G12 | BWT66(710)-G12 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #3,307 | #2,359 | 14,005 | BWT66(710)-G12 leads by 948 places | | Power density | #3,361 | #2,474 | 14,005 | BWT66(710)-G12 leads by 887 places | | Heat behaviour | #6,093 | #2,165 | 14,005 | BWT66(710)-G12 leads by 3,928 places | | Weight | #7,628 | #1,881 | 14,005 | BWT66(710)-G12 leads by 5,747 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #747 | #516 | 14,005 | BWT66(710)-G12 leads by 231 places | ## Questions ### Which panel is better: Sunova TS-BGT66(705)-G12 or Sunova TS-BWT66(710)-G12? According to our database: **Sunova TS-BWT66(710)-G12** has higher module efficiency (**22.90%** vs **22.70%**); **Sunova TS-BWT66(710)-G12** tolerates heat better (temp coeff **-0.290%/°C** vs **-0.300%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Sunova TS-BGT66(705)-G12 and Sunova TS-BWT66(710)-G12? **Sunova TS-BGT66(705)-G12** has a module efficiency of **22.70%**, while **Sunova TS-BWT66(710)-G12** is **22.90%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Sunova TS-BGT66(705)-G12 use vs Sunova TS-BWT66(710)-G12? **Sunova TS-BGT66(705)-G12** uses **N-type** cells; **Sunova TS-BWT66(710)-G12** 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 Sunova TS-BGT66(705)-G12 and Sunova TS-BWT66(710)-G12? **Sunova TS-BGT66(705)-G12** has a **30 years** power warranty; **Sunova TS-BWT66(710)-G12** 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 Sunova TS-BGT66(705)-G12 and Sunova TS-BWT66(710)-G12 bifacial panels? Both **Sunova TS-BGT66(705)-G12** and **Sunova TS-BWT66(710)-G12** 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 - [Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(720)-G12](https://comparepv.com/compare/sunova-ts-bgt66-705-g12/sunova-ts-bgt66-720-g12) - 3 differences, the largest is module efficiency - [Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(715)-G12](https://comparepv.com/compare/sunova-ts-bgt66-705-g12/sunova-ts-bgt66-715-g12) - 3 differences, the largest is module efficiency - [Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(710)-G12](https://comparepv.com/compare/sunova-ts-bgt66-705-g12/sunova-ts-bgt66-710-g12) - One difference: module efficiency - [Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(700)-G12](https://comparepv.com/compare/sunova-ts-bgt66-705-g12/sunova-ts-bgt66-700-g12) - One difference: module efficiency - [Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(620)-G11](https://comparepv.com/compare/sunova-ts-bgt66-705-g12/sunova-ts-bgt66-620-g11) - 8 differences, the largest is rated power - [Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(615)-G11](https://comparepv.com/compare/sunova-ts-bgt66-705-g12/sunova-ts-bgt66-615-g11) - 7 differences, the largest is rated power --- Source: https://comparepv.com/compare/sunova-ts-bgt66-705-g12/sunova-ts-bwt66-710-g12 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.