Tata Power Solar TP642LG10B vs Tata Power Solar TP631LG10B
VS
The verdict
TP642LG10B leads on the differences that matter
The largest is module efficiency: 0.39 pp more efficient. 16 of 19 comparable parameters are identical.
See all 3 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
TP642LG10B
TP631LG10B
Difference
Module efficiency
23.05 %
22.66 %
0.39 pp more efficient
Power density
230.5 Wp/m²
226.6 Wp/m²
3.9 Wp/m² higher
Rated power
642 Wp
631 Wp
11 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 (-0.370 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
TP642LG10B
20,523 kWh
TP631LG10B
20,172 kWh
Lifetime gap
351 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TP642LG10B
TP631LG10B
Standard test conditions
25 °C
100.0% of rated power
642 W
631 W
Cool, bright day
40 °C
94.5% of rated power
606 W
596 W
Typical summer roof
55 °C
88.9% of rated power
571 W
561 W
Hot roof
70 °C
83.3% of rated power
535 W
526 W
03
Full specification
Parameter
TP642LG10B
TP631LG10B
Difference
Power and efficiency
Rated power
642 Wp
631 Wp
+11 W for TP642LG10B
Module efficiency
23.05 %
22.66 %
+0.39 pp for TP642LG10B
Power density
230.5 Wp/m²
226.6 Wp/m²
+3.9 Wp/m² for TP642LG10B
Open-circuit voltage
55.00 V
54.76 V
Effectively the same
Voltage at max power
47.28 V
47.04 V
Effectively the same
Short-circuit current
14.01 A
13.93 A
Effectively the same
Current at max power
13.58 A
13.42 A
Effectively the same
Temperature
Temperature coefficient
-0.370 %/°C
-0.370 %/°C
Same
Mechanical
Dimensions
2456x1134x35 mm
2456x1134x35 mm
Same
Module area
2.785 m²
2.785 m²
Same
Weight
36.0 kg
36.0 kg
Same
Weight per kWp
56.1 kg/kWp
57.1 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.60 %/yr
0.60 %/yr
Same
Technology
Cell technology
PERC
PERC
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
156
156
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#1,700
vs
#3,520
TP642LG10B leads by 1,820 places
Power density
#1,701
vs
#3,492
TP642LG10B leads by 1,791 places
Heat behaviour
#13,081
vs
#13,081
Tied - the same position in the database
Weight
#10,369
vs
#11,038
TP642LG10B leads by 669 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,920
vs
#2,582
TP642LG10B leads by 662 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Tata Power Solar TP642LG10B or Tata Power Solar TP631LG10B?
According to our database: Tata Power Solar TP642LG10B has higher module efficiency (23.05% vs 22.66%). 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 TP631LG10B?
Tata Power Solar TP642LG10B has a module efficiency of 23.05%, while Tata Power Solar TP631LG10B is 22.66%. 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 TP631LG10B?
Tata Power Solar TP642LG10B uses PERC cells; Tata Power Solar TP631LG10B 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 TP642LG10B and Tata Power Solar TP631LG10B?
Tata Power Solar TP642LG10B has a 30 years power warranty; Tata Power Solar TP631LG10B 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 TP631LG10B bifacial panels?
Both Tata Power Solar TP642LG10B and Tata Power Solar TP631LG10B 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.