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GSD7S72T-580WT vs TP642LG10B 6 of 19 identical Swap Change panels

Tata Power Solar GSD7S72T-580WT vs Tata Power Solar TP642LG10B

Tata Power Solar
GSD7S72T-580WT
580 Wp 22.45 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Tata Power Solar TP642LG10B
Tata Power Solar
TP642LG10B
642 Wp 23.05 % PERC Bifacial
Open panel page Datasheet PDF
The verdict

GSD7S72T-580WT leads on the differences that matter

The largest is temperature coefficient: 0.070 %/°C better in heat. 6 of 19 comparable parameters are identical.

See all 13 differences
How alike are they
6 of 19 comparable
parameters are identical
identical differs
01

What actually differs

13 of 19 parameters
Parameter GSD7S72T-580WT TP642LG10B Difference
Temperature coefficient -0.300 %/°C -0.370 %/°C 0.070 %/°C better in heat
Rated power 580 Wp 642 Wp 62 W more power
Annual degradation 0.40 %/yr 0.60 %/yr 0.20 %/yr slower
Module efficiency 22.45 % 23.05 % 0.60 pp more efficient
Weight 32.0 kg 36.0 kg 4.0 kg lighter
Product warranty 25 yrs 12 yrs 13 yrs longer
Module area 2.583 m² 2.785 m² 0.202 m² apart
Power density 224.5 Wp/m² 230.5 Wp/m² 6.0 Wp/m² higher
Open-circuit voltage 51.02 V 55.00 V 3.98 V apart
Cell technology TOPCon PERC TOPCon vs PERC
Voltage at max power 42.37 V 47.28 V 4.91 V apart
Cell count 144 156 12 cells apart
Dimensions 2278x1134x30 mm 2456x1134x35 mm 2278x1134x30 mm vs 2456x1134x35 mm
02

What it means on a roof

Thirty years of production
Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, at 1,200 kWh/kWp a year
GSD7S72T-580WT
19,460 kWh
TP642LG10B
20,870 kWh
Lifetime gap
1,410 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario GSD7S72T-580WT TP642LG10B
Standard test conditions 25 °C 100.0% of rated power 580 W 642 W
Cool, bright day 40 °C 94.5% of rated power 554 W 606 W
Typical summer roof 55 °C 88.9% of rated power 528 W 571 W
Hot roof 70 °C 83.3% of rated power 502 W 535 W
03

Full specification

Parameter GSD7S72T-580WT TP642LG10B Difference
Power and efficiency
Rated power 580 Wp 642 Wp +62 W for TP642LG10B
Module efficiency 22.45 % 23.05 % +0.60 pp for TP642LG10B
Power density 224.5 Wp/m² 230.5 Wp/m² +6.0 Wp/m² for TP642LG10B
Open-circuit voltage 51.02 V 55.00 V 3.98 V apart
Voltage at max power 42.37 V 47.28 V 4.91 V apart
Short-circuit current 14.47 A 14.01 A Effectively the same
Current at max power 13.69 A 13.58 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.370 %/°C +0.070 %/°C for GSD7S72T-580WT
Mechanical
Dimensions 2278x1134x30 mm 2456x1134x35 mm 2278x1134x30 mm vs 2456x1134x35 mm
Module area 2.583 m² 2.785 m² 0.202 m² apart
Weight 32.0 kg 36.0 kg -4.0 kg for GSD7S72T-580WT
Weight per kWp 55.2 kg/kWp 56.1 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 12 yrs +13 yrs for GSD7S72T-580WT
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.60 %/yr -0.20 %/yr for GSD7S72T-580WT
Technology
Cell technology TOPCon PERC TOPCon vs PERC
Cell type Monocrystalline Monocrystalline Same
Cell count 144 156 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#4,620 vs #1,700
TP642LG10B leads by 2,920 places
Power density
#4,547 vs #1,701
TP642LG10B leads by 2,846 places
Heat behaviour
#6,093 vs #13,081
GSD7S72T-580WT leads by 6,988 places
Weight
#9,588 vs #10,369
GSD7S72T-580WT leads by 781 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,039 vs #1,920
TP642LG10B leads by 119 places
05

More useful comparisons

Open the full database
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06

Written summary

07

Questions about this pairing

Which panel is better: Tata Power Solar GSD7S72T-580WT or Tata Power Solar TP642LG10B?
According to our database: Tata Power Solar TP642LG10B has higher module efficiency (23.05% vs 22.45%); Tata Power Solar GSD7S72T-580WT tolerates heat better (temp coeff -0.300%/°C vs -0.370%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tata Power Solar GSD7S72T-580WT and Tata Power Solar TP642LG10B?
Tata Power Solar GSD7S72T-580WT has a module efficiency of 22.45%, while Tata Power Solar TP642LG10B is 23.05%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tata Power Solar GSD7S72T-580WT use vs Tata Power Solar TP642LG10B?
Tata Power Solar GSD7S72T-580WT uses TOPCon cells; Tata Power Solar TP642LG10B uses PERC. 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 Tata Power Solar GSD7S72T-580WT and Tata Power Solar TP642LG10B?
Tata Power Solar GSD7S72T-580WT has a 30 years power warranty; Tata Power Solar TP642LG10B 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 Tata Power Solar GSD7S72T-580WT and Tata Power Solar TP642LG10B bifacial panels?
Both Tata Power Solar GSD7S72T-580WT and Tata Power Solar TP642LG10B 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.