Tata Power Solar TP631LG10B vs Tata Power Solar TP621LG10B
VS
The verdict
TP631LG10B leads on the differences that matter
The largest is module efficiency: 0.36 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
TP631LG10B
TP621LG10B
Difference
Module efficiency
22.66 %
22.30 %
0.36 pp more efficient
Power density
226.6 Wp/m²
223.0 Wp/m²
3.6 Wp/m² higher
Rated power
631 Wp
621 Wp
10 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.
TP631LG10B
20,172 kWh
TP621LG10B
19,852 kWh
Lifetime gap
320 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TP631LG10B
TP621LG10B
Standard test conditions
25 °C
100.0% of rated power
631 W
621 W
Cool, bright day
40 °C
94.5% of rated power
596 W
587 W
Typical summer roof
55 °C
88.9% of rated power
561 W
552 W
Hot roof
70 °C
83.3% of rated power
526 W
518 W
03
Full specification
Parameter
TP631LG10B
TP621LG10B
Difference
Power and efficiency
Rated power
631 Wp
621 Wp
+10 W for TP631LG10B
Module efficiency
22.66 %
22.30 %
+0.36 pp for TP631LG10B
Power density
226.6 Wp/m²
223.0 Wp/m²
+3.6 Wp/m² for TP631LG10B
Open-circuit voltage
54.76 V
54.52 V
Effectively the same
Voltage at max power
47.04 V
46.80 V
Effectively the same
Short-circuit current
13.93 A
13.83 A
Effectively the same
Current at max power
13.42 A
13.26 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
57.1 kg/kWp
58.0 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
#3,520
vs
#5,100
TP631LG10B leads by 1,580 places
Power density
#3,492
vs
#5,093
TP631LG10B leads by 1,601 places
Heat behaviour
#13,081
vs
#13,081
Tied - the same position in the database
Weight
#11,038
vs
#11,501
TP631LG10B leads by 463 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2,582
vs
#3,329
TP631LG10B leads by 747 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Tata Power Solar TP631LG10B or Tata Power Solar TP621LG10B?
According to our database: Tata Power Solar TP631LG10B has higher module efficiency (22.66% vs 22.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tata Power Solar TP631LG10B and Tata Power Solar TP621LG10B?
Tata Power Solar TP631LG10B has a module efficiency of 22.66%, while Tata Power Solar TP621LG10B is 22.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tata Power Solar TP631LG10B use vs Tata Power Solar TP621LG10B?
Tata Power Solar TP631LG10B uses PERC cells; Tata Power Solar TP621LG10B 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 TP631LG10B and Tata Power Solar TP621LG10B?
Tata Power Solar TP631LG10B has a 30 years power warranty; Tata Power Solar TP621LG10B 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 TP631LG10B and Tata Power Solar TP621LG10B bifacial panels?
Both Tata Power Solar TP631LG10B and Tata Power Solar TP621LG10B 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.