---
title: "Astronergy CHSM78N(DG)/F-BH 645W vs Astronergy CHSM72N(DG)/F-BH 600 - Solar Panel Comparison | ComparePV"
description: "Compare Astronergy CHSM78N(DG)/F-BH 645W vs Astronergy CHSM72N(DG)/F-BH 600 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification."
source: "https://comparepv.com/compare/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-645w/astronergy-chsm72n-dg-f-bh-600"
updated: 2026-09-11
---

# Astronergy CHSM78N(DG)/F-BH 645W vs Astronergy CHSM72N(DG)/F-BH 600

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 CHSM78N(DG)/F-BH 645W](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-645w) | [Astronergy CHSM72N(DG)/F-BH 600](https://comparepv.com/panel/astronergy-chsm72n-dg-f-bh-600) |
| Manufacturer | Astronergy | Astronergy |
| Power | 645 Wp | 600 Wp |
| Efficiency | 23.10 % | 23.20 % |
| Technology | TOPCon | TOPCon |


## Where they differ

Ranked by how much the difference matters, not by datasheet order.


| Parameter | CHSM78N(DG)/F-BH 645W | CHSM72N(DG)/F-BH 600 | Difference |
| --- | --- | --- | --- |
| Rated power | 645 Wp | 600 Wp | +45 W for CHSM78N(DG)/F-BH 645W |
| Open-circuit voltage | 57.08 V | 52.10 V | 4.98 V apart |
| Module area | 2.795 m² | 2.583 m² | 0.212 m² apart |
| Weight | 34.7 kg | 32.1 kg | -2.6 kg for CHSM72N(DG)/F-BH 600 |
| Voltage at max power | 48.03 V | 43.78 V | 4.25 V apart |
| Cell count | 156 | 144 | 12 cells apart |
| Dimensions | 2465x1134x30 mm | 2278x1134x30 mm | 2465x1134x30 mm vs 2278x1134x30 mm |


## Every compared parameter


| Parameter | CHSM78N(DG)/F-BH 645W | CHSM72N(DG)/F-BH 600 |
| --- | --- | --- |
| Rated power | 645 Wp | 600 Wp |
| Module efficiency | 23.10 % | 23.20 % |
| Power density | 230.7 Wp/m² | 232.3 Wp/m² |
| Open-circuit voltage | 57.08 V | 52.10 V |
| Voltage at max power | 48.03 V | 43.78 V |
| Short-circuit current | 14.20 A | 14.61 A |
| Current at max power | 13.43 A | 13.70 A |
| Temperature coefficient | -0.290 %/°C | -0.290 %/°C |
| Dimensions | 2465x1134x30 mm | 2278x1134x30 mm |
| Module area | 2.795 m² | 2.583 m² |
| Weight | 34.7 kg | 32.1 kg |
| Weight per kWp | 53.8 kg/kWp | 53.5 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 | 156 | 144 |
| 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, CHSM78N(DG)/F-BH 645W:** 21,641 kWh
- **Cumulative output, CHSM72N(DG)/F-BH 600:** 20,131 kWh
- **Gap:** 1,510 kWh


## Output when hot


| Condition | Cell temperature | CHSM78N(DG)/F-BH 645W | CHSM72N(DG)/F-BH 600 | Retained |
| --- | --- | --- | --- | --- |
| Standard test conditions | 25 °C | 645 W | 600 W | 100.0% of rated power |
| Cool, bright day | 40 °C | 617 W | 574 W | 95.7% of rated power |
| Typical summer roof | 55 °C | 589 W | 548 W | 91.3% of rated power |
| Hot roof | 70 °C | 561 W | 522 W | 87.0% of rated power |


## Against the whole database


| Measure | CHSM78N(DG)/F-BH 645W | CHSM72N(DG)/F-BH 600 | Out of | Note |
| --- | --- | --- | --- | --- |
| Efficiency | #1,570 | #1,306 | 14,005 | CHSM72N(DG)/F-BH 600 leads by 264 places |
| Power density | #1,654 | #1,252 | 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 | #7,876 | #7,477 | 14,005 | CHSM72N(DG)/F-BH 600 leads by 399 places |
| Warranty | #21 | #21 | 14,005 | Tied - the same position in the database |
| Overall | #1,496 | #2,413 | 14,005 | CHSM78N(DG)/F-BH 645W leads by 917 places |


## Questions


### Which panel is better: Astronergy CHSM78N(DG)/F-BH 645W or Astronergy CHSM72N(DG)/F-BH 600?

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 CHSM78N(DG)/F-BH 645W and Astronergy CHSM72N(DG)/F-BH 600?

**Astronergy CHSM78N(DG)/F-BH **645 W**** has a module efficiency of **23.10%**, while **Astronergy CHSM72N(DG)/F-BH 600** is **23.20%**. Higher efficiency means more electricity from the same roof area - useful when space is limited.


### What cell technology does Astronergy CHSM78N(DG)/F-BH 645W use vs Astronergy CHSM72N(DG)/F-BH 600?

**Astronergy CHSM78N(DG)/F-BH **645 W**** uses **TOPCon** cells; **Astronergy CHSM72N(DG)/F-BH 600** 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 CHSM78N(DG)/F-BH 645W and Astronergy CHSM72N(DG)/F-BH 600?

**Astronergy CHSM78N(DG)/F-BH **645 W**** has a **30 years** power warranty; **Astronergy CHSM72N(DG)/F-BH 600** 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 CHSM78N(DG)/F-BH 645W and Astronergy CHSM72N(DG)/F-BH 600 bifacial panels?

Both **Astronergy CHSM78N(DG)/F-BH **645 W**** and **Astronergy CHSM72N(DG)/F-BH 600** 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 CHSM78N(DG)/F-BH 645W vs Astronergy CHSM78N(DG)/F-BH 650W](https://comparepv.com/compare/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-645w/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-650w) - One difference: module efficiency
- [Astronergy CHSM78N(DG)/F-BH 645W vs Astronergy CHSM78N(DG)/F-BH-650W](https://comparepv.com/compare/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-645w/astronergy-chsm78n-dg-f-bh-650w) - One difference: module efficiency
- [Astronergy CHSM78N(DG)/F-BH 645W vs Astronergy CHSM78N(DG)/F-BH-645W](https://comparepv.com/compare/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-645w/astronergy-chsm78n-dg-f-bh-645w) - One difference: voltage at max power
- [Astronergy CHSM78N(DG)/F-BH 645W vs Astronergy CHSM78N(DG)/F-BH 640W](https://comparepv.com/compare/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-645w/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-640w) - One difference: module efficiency
- [Astronergy CHSM78N(DG)/F-BH 645W vs Astronergy CHSM78N(DG)/F-BH-640W](https://comparepv.com/compare/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-645w/astronergy-chsm78n-dg-f-bh-640w) - 2 differences, the largest is module efficiency
- [Astronergy CHSM78N(DG)/F-BH 645W vs Astronergy CHSM78N(DG)/F-BH 635W](https://comparepv.com/compare/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-645w/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-635w) - 3 differences, the largest is module efficiency


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Source: https://comparepv.com/compare/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-645w/astronergy-chsm72n-dg-f-bh-600

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.