Tata Power Solar TP621LG10B vs Tata Power Solar TP570LG10B
VS
The verdict
TP621LG10B leads on the differences that matter
The largest is module efficiency: 1.83 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
TP621LG10B
TP570LG10B
Difference
Module efficiency
22.30 %
20.47 %
1.83 pp more efficient
Rated power
621 Wp
570 Wp
51 W more power
Power density
223.0 Wp/m²
204.7 Wp/m²
18.3 Wp/m² higher
Weight per kWp
58.0 kg/kWp
63.2 kg/kWp
5.2 kg/kWp lighter
Short-circuit current
13.83 A
13.04 A
0.79 A apart
Open-circuit voltage
54.52 V
53.41 V
1.11 V apart
Current at max power
13.26 A
12.47 A
0.79 A apart
Voltage at max power
46.80 V
45.71 V
1.09 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.
TP621LG10B
19,852 kWh
TP570LG10B
18,222 kWh
Lifetime gap
1,630 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TP621LG10B
TP570LG10B
Standard test conditions
25 °C
100.0% of rated power
621 W
570 W
Cool, bright day
40 °C
94.5% of rated power
587 W
538 W
Typical summer roof
55 °C
88.9% of rated power
552 W
507 W
Hot roof
70 °C
83.3% of rated power
518 W
475 W
03
Full specification
Parameter
TP621LG10B
TP570LG10B
Difference
Power and efficiency
Rated power
621 Wp
570 Wp
+51 W for TP621LG10B
Module efficiency
22.30 %
20.47 %
+1.83 pp for TP621LG10B
Power density
223.0 Wp/m²
204.7 Wp/m²
+18.3 Wp/m² for TP621LG10B
Open-circuit voltage
54.52 V
53.41 V
1.11 V apart
Voltage at max power
46.80 V
45.71 V
1.09 V apart
Short-circuit current
13.83 A
13.04 A
0.79 A apart
Current at max power
13.26 A
12.47 A
0.79 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
58.0 kg/kWp
63.2 kg/kWp
-5.2 kg/kWp for TP621LG10B
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
#5,100
vs
#11,523
TP621LG10B leads by 6,423 places
Power density
#5,093
vs
#11,502
TP621LG10B leads by 6,409 places
Heat behaviour
#13,081
vs
#13,081
Tied - the same position in the database
Weight
#11,501
vs
#12,860
TP621LG10B leads by 1,359 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#3,329
vs
#7,324
TP621LG10B leads by 3,995 places
05
Open the full database
More useful comparisons
Same series, other bin
Tata Power Solar
Tata Power Solar TP621LG10B vs Tata Power Solar TP642LG10B
3 differences, the largest is module efficiency
Same series, other bin
Tata Power Solar
Tata Power Solar TP621LG10B vs Tata Power Solar TP637LG10B
3 differences, the largest is module efficiency
Same series, other bin
Tata Power Solar
Tata Power Solar TP621LG10B vs Tata Power Solar TP631LG10B
3 differences, the largest is module efficiency
Same series, other bin
Tata Power Solar
Tata Power Solar TP621LG10B vs Tata Power Solar TP626LG10B
The same specification on paper
Same series, other bin
Tata Power Solar
Tata Power Solar TP621LG10B vs Tata Power Solar TP615LG10B
One difference: module efficiency
Same series, other bin
Tata Power Solar
Tata Power Solar TP621LG10B vs Tata Power Solar TP610LG10B
3 differences, the largest is module efficiency
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Tata Power Solar TP621LG10B or Tata Power Solar TP570LG10B?
According to our database: Tata Power Solar TP621LG10B has higher module efficiency (22.30% vs 20.47%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Tata Power Solar TP621LG10B and Tata Power Solar TP570LG10B?
Tata Power Solar TP621LG10B has a module efficiency of 22.30%, while Tata Power Solar TP570LG10B is 20.47%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tata Power Solar TP621LG10B use vs Tata Power Solar TP570LG10B?
Tata Power Solar TP621LG10B uses PERC cells; Tata Power Solar TP570LG10B 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 TP621LG10B and Tata Power Solar TP570LG10B?
Tata Power Solar TP621LG10B has a 30 years power warranty; Tata Power Solar TP570LG10B 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 TP621LG10B and Tata Power Solar TP570LG10B bifacial panels?
Both Tata Power Solar TP621LG10B and Tata Power Solar TP570LG10B 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.