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HS690TC-MHG-D vs HS645TC-MHD-D 7 of 18 identical Swap Change panels

Horay Solar HS690TC-MHG-D vs Horay Solar HS645TC-MHD-D

HS690TC-MHG-D
690 Wp 22.20 % TOPCon Bifacial Incomplete
Open panel page Datasheet PDF
VS
HS645TC-MHD-D
645 Wp 23.10 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

HS645TC-MHD-D leads on the differences that matter

The largest is module efficiency: 0.90 pp more efficient. 7 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 11 differences
How alike are they
7 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

11 of 18 parameters
Parameter HS690TC-MHG-D HS645TC-MHD-D Difference
Module efficiency 22.20 % 23.10 % 0.90 pp more efficient
Rated power 690 Wp 645 Wp 45 W more power
Weight 38.5 kg 34.5 kg 4.0 kg lighter
Power density 222.1 Wp/m² 230.7 Wp/m² 8.6 Wp/m² higher
Module area 3.106 m² 2.795 m² 0.311 m² apart
Short-circuit current 18.23 A 16.81 A 1.42 A apart
Cell technology TOPCon N-type TOPCon vs N-type
Cell count 132 144 12 cells apart
Weight per kWp 55.8 kg/kWp 53.5 kg/kWp 2.3 kg/kWp lighter
Current at max power 17.21 A 15.79 A 1.42 A apart
Dimensions 2384x1303x33 mm 2465x1134x30 mm 2384x1303x33 mm vs 2465x1134x30 mm
02

What it means on a roof

Thirty years of production
Declared first-year losses, with 0.40% a year afterwards assumed for both panels, 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.
HS690TC-MHG-D
23,151 kWh
HS645TC-MHD-D
21,641 kWh
Lifetime gap
1,510 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario HS690TC-MHG-D HS645TC-MHD-D
Standard test conditions 25 °C 100.0% of rated power 690 W 645 W
Cool, bright day 40 °C 95.8% of rated power 661 W 618 W
Typical summer roof 55 °C 91.6% of rated power 632 W 591 W
Hot roof 70 °C 87.4% of rated power 603 W 564 W
03

Full specification

Parameter HS690TC-MHG-D HS645TC-MHD-D Difference
Power and efficiency
Rated power 690 Wp 645 Wp +45 W for HS690TC-MHG-D
Module efficiency 22.20 % 23.10 % +0.90 pp for HS645TC-MHD-D
Power density 222.1 Wp/m² 230.7 Wp/m² +8.6 Wp/m² for HS645TC-MHD-D
Open-circuit voltage 48.20 V 48.16 V Effectively the same
Voltage at max power 40.10 V 40.85 V Effectively the same
Short-circuit current 18.23 A 16.81 A 1.42 A apart
Current at max power 17.21 A 15.79 A 1.42 A apart
Temperature
Temperature coefficient -0.280 %/°C -0.280 %/°C Same
Mechanical
Dimensions 2384x1303x33 mm 2465x1134x30 mm 2384x1303x33 mm vs 2465x1134x30 mm
Module area 3.106 m² 2.795 m² 0.311 m² apart
Weight 38.5 kg 34.5 kg -4.0 kg for HS645TC-MHD-D
Weight per kWp 55.8 kg/kWp 53.5 kg/kWp -2.3 kg/kWp for HS645TC-MHD-D
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation - 0.40 %/yr Not published by Horay Solar
Technology
Cell technology TOPCon N-type TOPCon vs N-type
Cell type Monocrystalline Monocrystalline Same
Cell count 132 144 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#5,817 vs #1,570
HS645TC-MHD-D leads by 4,247 places
Power density
#5,734 vs #1,654
HS645TC-MHD-D leads by 4,080 places
Heat behaviour
#1,309 vs #1,309
Tied - the same position in the database
Weight
#10,180 vs #7,451
HS645TC-MHD-D leads by 2,729 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,286 vs #1,496
HS690TC-MHG-D leads by 210 places
05

More useful comparisons

Open the full database
Same series, other bin
Horay Solar HS690TC-MHG-D vs Horay Solar HS720TC-MHG-D
6 differences, the largest is module efficiency
Same series, other bin
Horay Solar HS690TC-MHG-D vs Horay Solar HS710TC-MHG-D
3 differences, the largest is module efficiency
Same series, other bin
Horay Solar HS690TC-MHG-D vs Horay Solar HS700TC-MHG-D
3 differences, the largest is module efficiency
Same series, other bin
Horay Solar HS690TC-MHG-D vs Horay Solar HS680TC-MHG-D
3 differences, the largest is module efficiency
Same series, other bin
Horay Solar HS645TC-MHD-D vs Horay Solar HS650TC-MHD-D
One difference: module efficiency
Same series, other bin
Horay Solar HS645TC-MHD-D vs Horay Solar HS640TC-MHD-D
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Horay Solar HS690TC-MHG-D or Horay Solar HS645TC-MHD-D?
According to our database: Horay Solar HS645TC-MHD-D has higher module efficiency (23.10% vs 22.20%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Horay Solar HS690TC-MHG-D and Horay Solar HS645TC-MHD-D?
Horay Solar HS690TC-MHG-D has a module efficiency of 22.20%, while Horay Solar HS645TC-MHD-D is 23.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Horay Solar HS690TC-MHG-D use vs Horay Solar HS645TC-MHD-D?
Horay Solar HS690TC-MHG-D uses TOPCon cells; Horay Solar HS645TC-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 HS690TC-MHG-D and Horay Solar HS645TC-MHD-D?
Horay Solar HS690TC-MHG-D has a 30 years power warranty; Horay Solar HS645TC-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 HS690TC-MHG-D and Horay Solar HS645TC-MHD-D bifacial panels?
Both Horay Solar HS690TC-MHG-D and Horay Solar HS645TC-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.