--- title: "Astronergy CHSM72N(DG)/F-BH 600 vs Astronergy CHSM78N(DG)/F-BH-645W - Solar Panel Comparison | ComparePV" description: "Compare Astronergy CHSM72N(DG)/F-BH 600 vs Astronergy CHSM78N(DG)/F-BH-645W side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/astronergy-chsm72n-dg-f-bh-600/astronergy-chsm78n-dg-f-bh-645w" updated: 2026-09-11 --- # Astronergy CHSM72N(DG)/F-BH 600 vs Astronergy CHSM78N(DG)/F-BH-645W CHSM78N(DG)/F-BH-645W leads on the differences that matter The largest is rated power: 45 W more power. 12 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Astronergy CHSM72N(DG)/F-BH 600](https://comparepv.com/panel/astronergy-chsm72n-dg-f-bh-600) | [Astronergy CHSM78N(DG)/F-BH-645W](https://comparepv.com/panel/astronergy-chsm78n-dg-f-bh-645w) | | Manufacturer | Astronergy | Astronergy | | Power | 600 Wp | 645 Wp | | Efficiency | 23.20 % | 23.10 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | CHSM72N(DG)/F-BH 600 | CHSM78N(DG)/F-BH-645W | Difference | | --- | --- | --- | --- | | Rated power | 600 Wp | 645 Wp | +45 W for CHSM78N(DG)/F-BH-645W | | Open-circuit voltage | 52.10 V | 56.81 V | 4.71 V apart | | Module area | 2.583 m² | 2.795 m² | 0.212 m² apart | | Weight | 32.1 kg | 34.7 kg | -2.6 kg for CHSM72N(DG)/F-BH 600 | | Cell count | 144 | 156 | 12 cells apart | | Voltage at max power | 43.78 V | 46.95 V | 3.17 V apart | | Dimensions | 2278x1134x30 mm | 2465x1134x30 mm | 2278x1134x30 mm vs 2465x1134x30 mm | ## Every compared parameter | Parameter | CHSM72N(DG)/F-BH 600 | CHSM78N(DG)/F-BH-645W | | --- | --- | --- | | Rated power | 600 Wp | 645 Wp | | Module efficiency | 23.20 % | 23.10 % | | Power density | 232.3 Wp/m² | 230.7 Wp/m² | | Open-circuit voltage | 52.10 V | 56.81 V | | Voltage at max power | 43.78 V | 46.95 V | | Short-circuit current | 14.61 A | 14.43 A | | Current at max power | 13.70 A | 13.74 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 2278x1134x30 mm | 2465x1134x30 mm | | Module area | 2.583 m² | 2.795 m² | | Weight | 32.1 kg | 34.7 kg | | Weight per kWp | 53.5 kg/kWp | 53.8 kg/kWp | | Product warranty | 15 yrs | 15 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 | 144 | 156 | | 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 (-0.290 %/°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, CHSM72N(DG)/F-BH 600:** 20,131 kWh - **Cumulative output, CHSM78N(DG)/F-BH-645W:** 21,641 kWh - **Gap:** 1,510 kWh ## Output when hot | Condition | Cell temperature | CHSM72N(DG)/F-BH 600 | CHSM78N(DG)/F-BH-645W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 600 W | 645 W | 100.0% of rated power | | Cool, bright day | 40 °C | 574 W | 617 W | 95.7% of rated power | | Typical summer roof | 55 °C | 548 W | 589 W | 91.3% of rated power | | Hot roof | 70 °C | 522 W | 561 W | 87.0% of rated power | ## Against the whole database | Measure | CHSM72N(DG)/F-BH 600 | CHSM78N(DG)/F-BH-645W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,306 | #1,570 | 14,005 | CHSM72N(DG)/F-BH 600 leads by 264 places | | Power density | #1,252 | #1,654 | 14,005 | CHSM72N(DG)/F-BH 600 leads by 402 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #7,477 | #7,876 | 14,005 | CHSM72N(DG)/F-BH 600 leads by 399 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,413 | #1,496 | 14,005 | CHSM78N(DG)/F-BH-645W leads by 917 places | ## Questions ### Which panel is better: Astronergy CHSM72N(DG)/F-BH 600 or Astronergy CHSM78N(DG)/F-BH-645W? According to our database: **Astronergy CHSM72N(DG)/F-BH 600** has higher module efficiency (**23.20%** vs **23.10%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Astronergy CHSM72N(DG)/F-BH 600 and Astronergy CHSM78N(DG)/F-BH-645W? **Astronergy CHSM72N(DG)/F-BH 600** has a module efficiency of **23.20%**, while **Astronergy CHSM78N(DG)/F-BH-**645 W**** is **23.10%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Astronergy CHSM72N(DG)/F-BH 600 use vs Astronergy CHSM78N(DG)/F-BH-645W? **Astronergy CHSM72N(DG)/F-BH 600** uses **TOPCon** cells; **Astronergy CHSM78N(DG)/F-BH-**645 W**** 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 Astronergy CHSM72N(DG)/F-BH 600 and Astronergy CHSM78N(DG)/F-BH-645W? **Astronergy CHSM72N(DG)/F-BH 600** has a **30 years** power warranty; **Astronergy CHSM78N(DG)/F-BH-**645 W**** 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 Astronergy CHSM72N(DG)/F-BH 600 and Astronergy CHSM78N(DG)/F-BH-645W bifacial panels? Both **Astronergy CHSM72N(DG)/F-BH 600** and **Astronergy CHSM78N(DG)/F-BH-**645 W**** 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 - [Astronergy CHSM72N(DG)/F-BH 600 vs Astronergy CHSM78N(DG)/F-BH-650](https://comparepv.com/compare/astronergy-chsm72n-dg-f-bh-600/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-650) - 7 differences, the largest is rated power - [Astronergy CHSM72N(DG)/F-BH 600 vs Astronergy CHSM78N(DG)/F-BH 650W](https://comparepv.com/compare/astronergy-chsm72n-dg-f-bh-600/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-650w) - 7 differences, the largest is rated power - [Astronergy CHSM72N(DG)/F-BH 600 vs Astronergy CHSM78N(DG)/F-BH-650W](https://comparepv.com/compare/astronergy-chsm72n-dg-f-bh-600/astronergy-chsm78n-dg-f-bh-650w) - 7 differences, the largest is rated power - [Astronergy CHSM72N(DG)/F-BH 600 vs Astronergy CHSM78N(DG)/F-BH-645](https://comparepv.com/compare/astronergy-chsm72n-dg-f-bh-600/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-645) - 7 differences, the largest is rated power - [Astronergy CHSM72N(DG)/F-BH 600 vs Astronergy CHSM78N(DG)/F-BH 645W](https://comparepv.com/compare/astronergy-chsm72n-dg-f-bh-600/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-645w) - 7 differences, the largest is rated power - [Astronergy CHSM72N(DG)/F-BH 600 vs Astronergy CHSM78N(DG)/F-BH-640](https://comparepv.com/compare/astronergy-chsm72n-dg-f-bh-600/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-640) - 9 differences, the largest is rated power --- Source: https://comparepv.com/compare/astronergy-chsm72n-dg-f-bh-600/astronergy-chsm78n-dg-f-bh-645w 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.