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HS650TC-MHD-D vs HS640TC-MHD-D 16 of 19 identical Swap Change panels

Horay Solar HS650TC-MHD-D vs Horay Solar HS640TC-MHD-D

HS650TC-MHD-D
650 Wp 23.30 % N-type Bifacial
Open panel page Datasheet PDF
VS
HS640TC-MHD-D
640 Wp 22.90 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

HS650TC-MHD-D leads on the differences that matter

The largest is module efficiency: 0.40 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter HS650TC-MHD-D HS640TC-MHD-D Difference
Module efficiency 23.30 % 22.90 % 0.40 pp more efficient
Power density 232.5 Wp/m² 229.0 Wp/m² 3.6 Wp/m² higher
Rated power 650 Wp 640 Wp 10 W more power
02

What it means on a roof

Thirty years of production
Each panel's own declared degradation curve, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.280 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
HS650TC-MHD-D
21,809 kWh
HS640TC-MHD-D
21,473 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario HS650TC-MHD-D HS640TC-MHD-D
Standard test conditions 25 °C 100.0% of rated power 650 W 640 W
Cool, bright day 40 °C 95.8% of rated power 623 W 613 W
Typical summer roof 55 °C 91.6% of rated power 595 W 586 W
Hot roof 70 °C 87.4% of rated power 568 W 559 W
03

Full specification

Parameter HS650TC-MHD-D HS640TC-MHD-D Difference
Power and efficiency
Rated power 650 Wp 640 Wp +10 W for HS650TC-MHD-D
Module efficiency 23.30 % 22.90 % +0.40 pp for HS650TC-MHD-D
Power density 232.5 Wp/m² 229.0 Wp/m² +3.6 Wp/m² for HS650TC-MHD-D
Open-circuit voltage 48.20 V 48.08 V Effectively the same
Voltage at max power 40.89 V 40.79 V Effectively the same
Short-circuit current 16.93 A 16.71 A Effectively the same
Current at max power 15.90 A 15.69 A Effectively the same
Temperature
Temperature coefficient -0.280 %/°C -0.280 %/°C Same
Mechanical
Dimensions 2465x1134x30 mm 2465x1134x30 mm Same
Module area 2.795 m² 2.795 m² Same
Weight 34.5 kg 34.5 kg Same
Weight per kWp 53.1 kg/kWp 53.9 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology N-type N-type Same
Cell type Monocrystalline Monocrystalline Same
Cell count 144 144 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,017 vs #2,359
HS650TC-MHD-D leads by 1,342 places
Power density
#1,222 vs #2,389
HS650TC-MHD-D leads by 1,167 places
Heat behaviour
#1,309 vs #1,309
Tied - the same position in the database
Weight
#6,836 vs #8,037
HS650TC-MHD-D leads by 1,201 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,318 vs #1,704
HS650TC-MHD-D leads by 386 places
05

More useful comparisons

Open the full database
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Horay Solar HS650TC-MHD-D vs Horay Solar HS630TC-MHD-D
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Horay Solar HS650TC-MHD-D vs Horay Solar HS720TC-MHG-D
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Horay Solar HS650TC-MHD-D vs Horay Solar HS710TC-MHG-D
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Horay Solar HS650TC-MHD-D vs Horay Solar HS700TC-MHG-D
10 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Horay Solar HS650TC-MHD-D or Horay Solar HS640TC-MHD-D?
According to our database: Horay Solar HS650TC-MHD-D has higher module efficiency (23.30% vs 22.90%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Horay Solar HS650TC-MHD-D and Horay Solar HS640TC-MHD-D?
Horay Solar HS650TC-MHD-D has a module efficiency of 23.30%, while Horay Solar HS640TC-MHD-D is 22.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Horay Solar HS650TC-MHD-D use vs Horay Solar HS640TC-MHD-D?
Horay Solar HS650TC-MHD-D uses N-type cells; Horay Solar HS640TC-MHD-D uses N-type. 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 Horay Solar HS650TC-MHD-D and Horay Solar HS640TC-MHD-D?
Horay Solar HS650TC-MHD-D has a 30 years power warranty; Horay Solar HS640TC-MHD-D 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 Horay Solar HS650TC-MHD-D and Horay Solar HS640TC-MHD-D bifacial panels?
Both Horay Solar HS650TC-MHD-D and Horay Solar HS640TC-MHD-D 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.

Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate. The thirty-year projection and the temperature scenarios are calculations from those figures, and each states its assumption above.