Tata Power Solar TP580LG10B vs Tata Power Solar TP642LG10B
VS
The verdict
TP642LG10B leads on the differences that matter
The largest is module efficiency: 2.22 pp more efficient. 11 of 19 comparable parameters are identical.
See all 8 differencesHow alike are they
11
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
8 of 19 parameters
What actually differs
Parameter
TP580LG10B
TP642LG10B
Difference
Module efficiency
20.83 %
23.05 %
2.22 pp more efficient
Rated power
580 Wp
642 Wp
62 W more power
Power density
208.3 Wp/m²
230.5 Wp/m²
22.3 Wp/m² higher
Weight per kWp
62.1 kg/kWp
56.1 kg/kWp
6.0 kg/kWp lighter
Short-circuit current
13.12 A
14.01 A
0.89 A apart
Open-circuit voltage
53.63 V
55.00 V
1.37 V apart
Current at max power
12.62 A
13.58 A
0.96 A apart
Voltage at max power
45.97 V
47.28 V
1.31 V 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
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.
TP580LG10B
18,541 kWh
TP642LG10B
20,523 kWh
Lifetime gap
1,982 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TP580LG10B
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
548 W
606 W
Typical summer roof
55 °C
88.9% of rated power
516 W
571 W
Hot roof
70 °C
83.3% of rated power
483 W
535 W
03
Full specification
Parameter
TP580LG10B
TP642LG10B
Difference
Power and efficiency
Rated power
580 Wp
642 Wp
+62 W for TP642LG10B
Module efficiency
20.83 %
23.05 %
+2.22 pp for TP642LG10B
Power density
208.3 Wp/m²
230.5 Wp/m²
+22.3 Wp/m² for TP642LG10B
Open-circuit voltage
53.63 V
55.00 V
1.37 V apart
Voltage at max power
45.97 V
47.28 V
1.31 V apart
Short-circuit current
13.12 A
14.01 A
0.89 A apart
Current at max power
12.62 A
13.58 A
0.96 A apart
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
62.1 kg/kWp
56.1 kg/kWp
-6.0 kg/kWp for TP642LG10B
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
#10,433
vs
#1,700
TP642LG10B leads by 8,733 places
Power density
#10,448
vs
#1,701
TP642LG10B leads by 8,747 places
Heat behaviour
#13,081
vs
#13,081
Tied - the same position in the database
Weight
#12,738
vs
#10,369
TP642LG10B leads by 2,369 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#6,484
vs
#1,920
TP642LG10B leads by 4,564 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 TP580LG10B or Tata Power Solar TP642LG10B?
According to our database: Tata Power Solar TP642LG10B has higher module efficiency (23.05% vs 20.83%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tata Power Solar TP580LG10B and Tata Power Solar TP642LG10B?
Tata Power Solar TP580LG10B has a module efficiency of 20.83%, 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 TP580LG10B use vs Tata Power Solar TP642LG10B?
Tata Power Solar TP580LG10B uses PERC 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 TP580LG10B and Tata Power Solar TP642LG10B?
Tata Power Solar TP580LG10B 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 TP580LG10B and Tata Power Solar TP642LG10B bifacial panels?
Both Tata Power Solar TP580LG10B 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.