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Astronergy CHSM66RN(DG)/F-BH-640
Astronergy Brand review

CHSM66RN(DG)/F-BH-640

640 Wp TOPCon Bifacial 80%
ComparePV verdict

Efficiency leader, no clear weak spot

Rank 1,252 of 14,005
Compare panels Datasheet PDF
Power (Wp)
640
Strong · top 9%
Efficiency (%)
23.70
Strong · top 4%
Density (Wp/m²)
236.9
Strong · top 4%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
31.6
Strong · 1.1 kg below median
Warranty (yrs)
30
Typical · median 30 yrs

The Astronergy CHSM66RN(DG)/F-BH Bifacial (ASTRO N7 2.0) series was designed to maximize energy yield not only from the front but also the rear side of the module. This bifacial dual-glass solution better withstands external conditions and operates stably in projects where longevity and predictable production are key.

A key advantage of this series is the use of n-type TOPCon cells and ZBB (busbarless) technology, which minimizes shading losses from metalized busbars and improves current collection. In practice, this means better performance in real installation conditions and higher yield for the same construction surface. Additionally, solutions related to the protection of the edges of the cells support reliability and help minimize losses resulting from micro-cracks.

For investors, a significant benefit is the low Voc, which facilitates string design and may reduce BOS costs. This series will perform well in PV farms, C&I projects, ground-mounted and rooftop installations, especially where light reflection from the ground can be utilized.

Ranking

1,086 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.70% 22.80% Strong · top 4% 517
Power density 236.9 227.7 Strong · top 4% 521
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 49.5 53.1 Strong · top 18% 2,987
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

8 positive · 0 caution
Best for

Commercial, utility-scale and hot-climate.

Strengths
23.70% module efficiency

Top 4% of the TOPCon 600-650 W segment, against a median of 22.80%. Ranked 517th in the whole database.

236.9 watts per square metre

Top 4% of the TOPCon 600-650 W segment, against a median of 227.7. Ranked 521st in the whole database.

49.5 kg per kWp

Top 18% of the TOPCon 600-650 W segment, against a median of 53.1.

What owners get
Up to 24.1% Efficiency — Best-in-Class for 66-Cell Format

Peak efficiency of 24.1% places this series on par with the Jinko Tiger Neo 66HL4M-BDX (24.06%) and significantly ahead of the BYD AURO N (23.25%) and Einnova TOPCon (23.25%). For an identical mounting footprint, the module delivers measurably more energy than 90% of competing products in the 625–650 W power class.

Zero Busbar (ZBB) + TOPCon 5.0: Higher Yield Under Partial Shading

ZBB technology eliminates resistive losses from busbar metallization, and combined with low-temperature cell interconnection, provides 25% greater resistance to micro-cracks compared to conventional busbar modules. Annual degradation (years 2–30) is ≤0.4%, resulting in more stable energy output throughout the system's full operational lifetime.

15-Year Product Warranty — Outperforms Jinko

Astronergy provides a 15-year product warranty, while the Jinko Tiger Neo in the same power class offers only 12 years. The 30-year linear power warranty guaranteeing ≥87.4% of rated output represents a premium standard, backed by independent international insurance coverage.

Low Temperature Coefficient: -0.29%/°C

The -0.29%/°C temperature coefficient is better than the typical -0.30% to -0.35% seen in legacy PERC technology and most competitors in the 650 W class. In the Polish climate, where summer module temperatures regularly exceed 60°C, a difference of 0.01–0.06%/°C translates to tens of additional kWh per year per string.

Top-6 BNEF Bankability — Reliable Project Financing

Astronergy ranks in the Top 6 of BloombergNEF's global bankability index (2023 report), with a manufacturing capacity of 56 GW/year. Tier-1 status streamlines project financing and satisfies the due diligence requirements of lenders funding utility-scale PV plants and C&I installations.

Notes from the database
  • Efficiency of 23.7% is 0.9pp above the TOPCon 600-650W median (22.8%)
  • 236.9 W/m² power density - 9.2 W/m² more than TOPCon 600-650W median (227.7 W/m²), more power per roof area
  • At -0.29%/°C, hot weather performance is typical for TOPCon 600-650W panels
  • 31.6 kg weight - 1.1 kg lighter than TOPCon 600-650W median (32.7 kg), reducing installation effort
  • Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface

Specifications

Open datasheet PDF
Nominal power (Pmax) 640 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.70 % Strong Segment median 22.80%
Vmpp · Impp 41.99 V · 15.24 A Operating point at max power
Voc · Isc 49.57 V · 16.42 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2382×1134×30 mm · 2.70 m² of roof
Weight 31.6 kg Strong Strong · 1.1 kg below median
Cells 132 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.043 %/°C
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 559 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Astronergy in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 640 Wp appear here. The rest cover the whole series.

Linear Power Degradation Warranty (30 years) Linear Power Degradation Warranty (30 years) Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.290 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Astronergy CHSM66RN(DG)/F-BH-640 640 W 23.70% -0.290 31.6 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +1.5 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +40 W, cooler, +1.5 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +35 W, cooler, +1.3 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +1.3 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +30 W, lighter, +1.1 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +30 W, lighter, +1.1 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +1.1 pp
CHSM66RN(DG)/F-BH-600Wp 600 W 22.20% -0.290 33.5 kg -40 W, heavier, -1.5 pp
CHSM66RN(DG)/F-BH-605Wp 605 W 22.40% -0.290 33.5 kg -35 W, heavier, -1.3 pp
CHSM66RN(DG)/F-BH-610Wp 610 W 22.60% -0.290 33.5 kg -30 W, heavier, -1.1 pp
CHSM66RN(DG)/F-BH-615W 615 W 22.80% -0.290 31.6 kg -25 W, -0.9 pp
CHSM66RN(DG)/F-BH-620W 620 W 23.00% -0.290 31.6 kg -20 W, -0.7 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +60 W, cooler, +1.3 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +55 W, cooler, +1.2 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +30 W, cooler, +1.1 pp

Found 1119 panels of the same or similar size to this one, within ±10 mm. See them here Found 1125 panels of the same or similar size to this one, within ±25 mm. See them here Found 1236 panels of the same or similar size to this one, within ±50 mm. See them here Found 1917 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty coverage applies to the Astronergy ASTRO N7 2.0 CHSM66RN(DG)/F-BH panels?
The ASTRO N7 2.0 series is covered by a 15-year product warranty and a 30-year linear power output warranty. First-year degradation is capped at 1.0%, with subsequent annual degradation not exceeding 0.4% per year. Astronergy holds Tier 1 manufacturer status, which provides financial backing for warranty claims and ensures that those claims remain enforceable throughout the full operational lifetime of the installation.
What is ZBB technology in the ASTRO N7 2.0 panels, and does it genuinely improve performance?
ZBB (Zero Busbar / busbarless) replaces conventional wide busbars with a grid of 20 ultra-fine interconnections. Because metallic elements no longer shade the cell surface, current collection is directly increased. Astronergy states a cell efficiency gain of 0.4–0.55% and a bifaciality improvement of more than 5% compared to the previous generation. An additional benefit is the more uniform stress distribution across the cell structure, which reduces the risk of microcracks.
How much additional energy can the bifacial ASTRO N7 2.0 module generate from its rear side?
The CHSM66RN(DG)/F-BH series has a bifaciality factor of 80% ±5%. This means that with a favorable ground albedo coefficient — such as light gravel, concrete, or snow — the rear side of the panel can contribute an additional 10–20% of energy on top of the nominal 650 W front-side output. The effect is most pronounced in ground-mounted installations where modules are elevated at an optimal height above the surface.
Are the ASTRO N7 2.0 panels suitable for utility-scale PV farms and C&I installations?
Yes, the CHSM66RN(DG)/F-BH series is engineered for large-scale PV farm projects and commercial & industrial installations. The 2382×1134×30 mm form factor combined with a peak power output of up to 650 W enables high power density per unit area. The dual-glass construction enhances both mechanical strength and UV resistance. The low temperature coefficient of Voc (−0.25%/°C) simplifies string design and can reduce BoS costs by more than 3.5 ct CNY/W.
Do the n-type TOPCon cells in the ASTRO N7 2.0 perform better under overcast conditions than older p-type panels?
Yes. N-type TOPCon cells exhibit a higher current collection efficiency under diffuse light, which translates into superior performance on cloudy days and at low sun angles. An additional advantage is the complete absence of the LID (Light Induced Degradation) effect that progressively reduced the output power of conventional PERC cells during their initial hours of illumination. In practice, this results in higher annual energy yield for the same installed area.
How does the ASTRO N7 2.0 series differ from the original ASTRO N7?
The ASTRO N7 2.0 introduces TOPCon 5.0 technology featuring ultra-fine interconnection grids and ZBB in place of standard busbars, achieving a module efficiency of up to 24.1% compared to approximately 23% in the first-generation N7. Power output has increased from the 600–620 W range to 625–650 W while retaining the identical 2382×1134 mm form factor. The manufacturer also reports improved microcrack resistance attributed to the more uniform stress distribution within the cell structure.
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