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TP637LG10B vs TP540HG10TB 3 of 19 identical Swap Change panels

Tata Power Solar TP637LG10B vs Tata Power Solar TP540HG10TB

Tata Power Solar TP637LG10B
Tata Power Solar
TP637LG10B
637 Wp 22.87 % PERC Bifacial
Open panel page Datasheet PDF
VS
Tata Power Solar
TP540HG10TB
540 Wp 20.90 % PERC Bifacial
Open panel page Datasheet PDF
The verdict

TP637LG10B leads on the differences that matter

The largest is module efficiency: 1.97 pp more efficient. 3 of 19 comparable parameters are identical.

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

What actually differs

16 of 19 parameters
Parameter TP637LG10B TP540HG10TB Difference
Module efficiency 22.87 % 20.90 % 1.97 pp more efficient
Rated power 637 Wp 540 Wp 97 W more power
Power density 228.7 Wp/m² 209.0 Wp/m² 19.7 Wp/m² higher
Performance warranty 30 yrs 25 yrs 5 yrs longer
Weight 36.0 kg 29.0 kg 7.0 kg lighter
Annual degradation 0.60 %/yr 0.72 %/yr 0.12 %/yr slower
Open-circuit voltage 54.88 V 49.50 V 5.38 V apart
Module area 2.785 m² 2.583 m² 0.202 m² apart
Product warranty 12 yrs 10 yrs 2 yrs longer
Temperature coefficient -0.370 %/°C -0.360 %/°C 0.010 %/°C better in heat
Weight per kWp 56.5 kg/kWp 53.7 kg/kWp 2.8 kg/kWp lighter
Voltage at max power 47.16 V 42.45 V 4.71 V apart
Cell count 156 144 12 cells apart
Short-circuit current 13.97 A 13.23 A 0.74 A apart
Dimensions 2456x1134x35 mm 2278x1134x35 mm 2456x1134x35 mm vs 2278x1134x35 mm
Current at max power 13.50 A 12.72 A 0.78 A apart
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
TP637LG10B
20,364 kWh
TP540HG10TB
16,924 kWh
Lifetime gap
3,440 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario TP637LG10B TP540HG10TB
Standard test conditions 25 °C 100.0% of rated power 637 W 540 W
Cool, bright day 40 °C 94.5% of rated power 602 W 511 W
Typical summer roof 55 °C 88.9% of rated power 566 W 482 W
Hot roof 70 °C 83.3% of rated power 531 W 453 W
03

Full specification

Parameter TP637LG10B TP540HG10TB Difference
Power and efficiency
Rated power 637 Wp 540 Wp +97 W for TP637LG10B
Module efficiency 22.87 % 20.90 % +1.97 pp for TP637LG10B
Power density 228.7 Wp/m² 209.0 Wp/m² +19.7 Wp/m² for TP637LG10B
Open-circuit voltage 54.88 V 49.50 V 5.38 V apart
Voltage at max power 47.16 V 42.45 V 4.71 V apart
Short-circuit current 13.97 A 13.23 A 0.74 A apart
Current at max power 13.50 A 12.72 A 0.78 A apart
Temperature
Temperature coefficient -0.370 %/°C -0.360 %/°C +0.010 %/°C for TP540HG10TB
Mechanical
Dimensions 2456x1134x35 mm 2278x1134x35 mm 2456x1134x35 mm vs 2278x1134x35 mm
Module area 2.785 m² 2.583 m² 0.202 m² apart
Weight 36.0 kg 29.0 kg -7.0 kg for TP540HG10TB
Weight per kWp 56.5 kg/kWp 53.7 kg/kWp -2.8 kg/kWp for TP540HG10TB
Warranty and degradation
Product warranty 12 yrs 10 yrs +2 yrs for TP637LG10B
Performance warranty 30 yrs 25 yrs +5 yrs for TP637LG10B
Annual degradation 0.60 %/yr 0.72 %/yr -0.12 %/yr for TP637LG10B
Technology
Cell technology PERC PERC Same
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
#2,531 vs #10,072
TP637LG10B leads by 7,541 places
Power density
#2,447 vs #10,100
TP637LG10B leads by 7,653 places
Heat behaviour
#13,081 vs #12,345
TP540HG10TB leads by 736 places
Weight
#10,693 vs #7,707
TP540HG10TB leads by 2,986 places
Warranty
#21 vs #9,798
TP637LG10B leads by 9,777 places
Overall
#2,188 vs #9,325
TP637LG10B leads by 7,137 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: Tata Power Solar TP637LG10B or Tata Power Solar TP540HG10TB?
According to our database: Tata Power Solar TP637LG10B has higher module efficiency (22.87% vs 20.90%); Tata Power Solar TP540HG10TB tolerates heat better (temp coeff -0.360%/°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 TP637LG10B and Tata Power Solar TP540HG10TB?
Tata Power Solar TP637LG10B has a module efficiency of 22.87%, while Tata Power Solar TP540HG10TB is 20.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tata Power Solar TP637LG10B use vs Tata Power Solar TP540HG10TB?
Tata Power Solar TP637LG10B uses PERC cells; Tata Power Solar TP540HG10TB 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 TP637LG10B and Tata Power Solar TP540HG10TB?
Tata Power Solar TP637LG10B has a 30 years power warranty; Tata Power Solar TP540HG10TB has a 25 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 TP637LG10B and Tata Power Solar TP540HG10TB bifacial panels?
Both Tata Power Solar TP637LG10B and Tata Power Solar TP540HG10TB 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.