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TP642LG10B vs GSD7S72T-590WT 6 of 19 identical Swap Change panels

Tata Power Solar TP642LG10B vs Tata Power Solar GSD7S72T-590WT

Tata Power Solar TP642LG10B
Tata Power Solar
TP642LG10B
642 Wp 23.05 % PERC Bifacial
Open panel page Datasheet PDF
VS
Tata Power Solar
GSD7S72T-590WT
590 Wp 22.84 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

GSD7S72T-590WT 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 TP642LG10B GSD7S72T-590WT Difference
Temperature coefficient -0.370 %/°C -0.300 %/°C 0.070 %/°C better in heat
Rated power 642 Wp 590 Wp 52 W more power
Annual degradation 0.60 %/yr 0.40 %/yr 0.20 %/yr slower
Weight 36.0 kg 32.0 kg 4.0 kg lighter
Product warranty 12 yrs 25 yrs 13 yrs longer
Module area 2.785 m² 2.583 m² 0.202 m² apart
Open-circuit voltage 55.00 V 51.30 V 3.70 V apart
Module efficiency 23.05 % 22.84 % 0.21 pp more efficient
Cell technology PERC TOPCon PERC vs TOPCon
Voltage at max power 47.28 V 42.67 V 4.61 V apart
Cell count 156 144 12 cells apart
Short-circuit current 14.01 A 14.63 A 0.62 A apart
Dimensions 2456x1134x35 mm 2278x1134x30 mm 2456x1134x35 mm vs 2278x1134x30 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
TP642LG10B
20,870 kWh
GSD7S72T-590WT
19,796 kWh
Lifetime gap
1,074 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario TP642LG10B GSD7S72T-590WT
Standard test conditions 25 °C 100.0% of rated power 642 W 590 W
Cool, bright day 40 °C 94.5% of rated power 606 W 563 W
Typical summer roof 55 °C 88.9% of rated power 571 W 537 W
Hot roof 70 °C 83.3% of rated power 535 W 510 W
03

Full specification

Parameter TP642LG10B GSD7S72T-590WT Difference
Power and efficiency
Rated power 642 Wp 590 Wp +52 W for TP642LG10B
Module efficiency 23.05 % 22.84 % +0.21 pp for TP642LG10B
Power density 230.5 Wp/m² 228.4 Wp/m² Effectively the same
Open-circuit voltage 55.00 V 51.30 V 3.70 V apart
Voltage at max power 47.28 V 42.67 V 4.61 V apart
Short-circuit current 14.01 A 14.63 A 0.62 A apart
Current at max power 13.58 A 13.83 A Effectively the same
Temperature
Temperature coefficient -0.370 %/°C -0.300 %/°C +0.070 %/°C for GSD7S72T-590WT
Mechanical
Dimensions 2456x1134x35 mm 2278x1134x30 mm 2456x1134x35 mm vs 2278x1134x30 mm
Module area 2.785 m² 2.583 m² 0.202 m² apart
Weight 36.0 kg 32.0 kg -4.0 kg for GSD7S72T-590WT
Weight per kWp 56.1 kg/kWp 54.2 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 25 yrs +13 yrs for GSD7S72T-590WT
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.60 %/yr 0.40 %/yr -0.20 %/yr for GSD7S72T-590WT
Technology
Cell technology PERC TOPCon PERC vs TOPCon
Cell type Monocrystalline Monocrystalline Same
Cell count 156 144 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,700 vs #2,617
TP642LG10B leads by 917 places
Power density
#1,701 vs #2,598
TP642LG10B leads by 897 places
Heat behaviour
#13,081 vs #6,093
GSD7S72T-590WT leads by 6,988 places
Weight
#10,369 vs #8,477
GSD7S72T-590WT leads by 1,892 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,920 vs #1,591
GSD7S72T-590WT leads by 329 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: Tata Power Solar TP642LG10B or Tata Power Solar GSD7S72T-590WT?
According to our database: Tata Power Solar TP642LG10B has higher module efficiency (23.05% vs 22.84%); Tata Power Solar GSD7S72T-590WT 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 TP642LG10B and Tata Power Solar GSD7S72T-590WT?
Tata Power Solar TP642LG10B has a module efficiency of 23.05%, while Tata Power Solar GSD7S72T-590WT is 22.84%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tata Power Solar TP642LG10B use vs Tata Power Solar GSD7S72T-590WT?
Tata Power Solar TP642LG10B uses PERC cells; Tata Power Solar GSD7S72T-590WT 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 Tata Power Solar TP642LG10B and Tata Power Solar GSD7S72T-590WT?
Tata Power Solar TP642LG10B has a 30 years power warranty; Tata Power Solar GSD7S72T-590WT 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 TP642LG10B and Tata Power Solar GSD7S72T-590WT bifacial panels?
Both Tata Power Solar TP642LG10B and Tata Power Solar GSD7S72T-590WT 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.