--- title: "Astronergy CHSM66RN(DG)/F-BQ vs Astronergy CHSM66RN(DG)/F-BQ-670 - Solar Panel Comparison | ComparePV" description: "Compare Astronergy CHSM66RN(DG)/F-BQ vs Astronergy CHSM66RN(DG)/F-BQ-670 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/astronergy-chsm66rn-dg-f-bq/astronergy-chsm66rn-dg-f-bq-670" updated: 2026-09-11 --- # Astronergy CHSM66RN(DG)/F-BQ vs Astronergy CHSM66RN(DG)/F-BQ-670 Identical on every published parameter All 19 comparable parameters agree. 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 | [Astronergy CHSM66RN(DG)/F-BQ](https://comparepv.com/panel/astronergy-chsm66rn-dg-f-bq) | [Astronergy CHSM66RN(DG)/F-BQ-670](https://comparepv.com/panel/astronergy-chsm66rn-dg-f-bq-670) | | Manufacturer | Astronergy | Astronergy | | Power | 670 Wp | 670 Wp | | Efficiency | 24.80 % | 24.80 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | CHSM66RN(DG)/F-BQ | CHSM66RN(DG)/F-BQ-670 | | --- | --- | --- | | Rated power | 670 Wp | 670 Wp | | Module efficiency | 24.80 % | 24.80 % | | Power density | 248.0 Wp/m² | 248.0 Wp/m² | | Open-circuit voltage | 49.58 V | 49.58 V | | Voltage at max power | 41.65 V | 41.65 V | | Short-circuit current | 16.87 A | 16.87 A | | Current at max power | 16.09 A | 16.09 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 2382x1134x30 mm | 2382x1134x30 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 32.0 kg | 32.0 kg | | Weight per kWp | 47.8 kg/kWp | 47.8 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.35 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 264 | 264 | | 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 (-0.260 %/°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, CHSM66RN(DG)/F-BQ:** 22,655 kWh - **Cumulative output, CHSM66RN(DG)/F-BQ-670:** 22,655 kWh - **Gap:** No difference ## Output when hot | Condition | Cell temperature | CHSM66RN(DG)/F-BQ | CHSM66RN(DG)/F-BQ-670 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 670 W | 670 W | 100.0% of rated power | | Cool, bright day | 40 °C | 644 W | 644 W | 96.1% of rated power | | Typical summer roof | 55 °C | 618 W | 618 W | 92.2% of rated power | | Hot roof | 70 °C | 592 W | 592 W | 88.3% of rated power | ## Against the whole database | Measure | CHSM66RN(DG)/F-BQ | CHSM66RN(DG)/F-BQ-670 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #12 | #12 | 14,005 | Tied - the same position in the database | | Power density | #14 | #14 | 14,005 | Tied - the same position in the database | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #1,884 | #1,884 | 14,005 | Tied - the same position in the database | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #295 | #295 | 14,005 | Tied - the same position in the database | ## Questions ### Which panel is better: Astronergy CHSM66RN(DG)/F-BQ or Astronergy CHSM66RN(DG)/F-BQ-670? According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Astronergy CHSM66RN(DG)/F-BQ and Astronergy CHSM66RN(DG)/F-BQ-670? **Astronergy CHSM66RN(DG)/F-BQ** has a module efficiency of **24.80%**, while **Astronergy CHSM66RN(DG)/F-BQ-670** is **24.80%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Astronergy CHSM66RN(DG)/F-BQ use vs Astronergy CHSM66RN(DG)/F-BQ-670? **Astronergy CHSM66RN(DG)/F-BQ** uses **TOPCon** cells; **Astronergy CHSM66RN(DG)/F-BQ-670** 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 CHSM66RN(DG)/F-BQ and Astronergy CHSM66RN(DG)/F-BQ-670? **Astronergy CHSM66RN(DG)/F-BQ** has a **30 years** power warranty; **Astronergy CHSM66RN(DG)/F-BQ-670** 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 CHSM66RN(DG)/F-BQ and Astronergy CHSM66RN(DG)/F-BQ-670 bifacial panels? Both **Astronergy CHSM66RN(DG)/F-BQ** and **Astronergy CHSM66RN(DG)/F-BQ-670** 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 CHSM66RN(DG)/F-BQ vs Astronergy CHSM66RN(DG)/F-BQ-665](https://comparepv.com/compare/astronergy-chsm66rn-dg-f-bq/astronergy-chsm66rn-dg-f-bq-665) - One difference: module efficiency - [Astronergy CHSM66RN(DG)/F-BQ vs Astronergy CHSM66RN(DG)/F-BQ-660](https://comparepv.com/compare/astronergy-chsm66rn-dg-f-bq/astronergy-chsm66rn-dg-f-bq-660) - 3 differences, the largest is module efficiency - [Astronergy CHSM66RN(DG)/F-BQ vs Astronergy CHSM66RN(DG)/F-BQ-655](https://comparepv.com/compare/astronergy-chsm66rn-dg-f-bq/astronergy-chsm66rn-dg-f-bq-655) - 3 differences, the largest is module efficiency - [Astronergy CHSM66RN(DG)/F-BQ vs Astronergy CHSM66RN(DG)/F-BQ-650](https://comparepv.com/compare/astronergy-chsm66rn-dg-f-bq/astronergy-chsm66rn-dg-f-bq-650) - 3 differences, the largest is module efficiency - [Astronergy CHSM66RN(DG)/F-BQ vs Astronergy CHSM66RN(DG)/F-BQ-645](https://comparepv.com/compare/astronergy-chsm66rn-dg-f-bq/astronergy-chsm66rn-dg-f-bq-645) - 3 differences, the largest is module efficiency - [Astronergy CHSM66RN(DG)/F-BQ vs Astronergy CHSM66N(DG)/F-BH-735](https://comparepv.com/compare/astronergy-chsm66rn-dg-f-bq/astronergy-chsm66n-dg-f-bh-735) - 12 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/astronergy-chsm66rn-dg-f-bq/astronergy-chsm66rn-dg-f-bq-670 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.