Tata Power Solar TP615LG10B vs Tata Power Solar TP590LG10TB
VS
The verdict
TP615LG10B leads on the differences that matter
The largest is module efficiency: 0.90 pp more efficient. 9 of 19 comparable parameters are identical.
See all 10 differencesHow alike are they
9
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
10 of 19 parameters
What actually differs
Parameter
TP615LG10B
TP590LG10TB
Difference
Module efficiency
22.08 %
21.18 %
0.90 pp more efficient
Performance warranty
30 yrs
25 yrs
5 yrs longer
Weight
36.0 kg
31.0 kg
5.0 kg lighter
Power density
220.8 Wp/m²
211.8 Wp/m²
9.0 Wp/m² higher
Rated power
615 Wp
590 Wp
25 W more power
Annual degradation
0.60 %/yr
0.72 %/yr
0.12 %/yr slower
Weight per kWp
58.5 kg/kWp
52.5 kg/kWp
6.0 kg/kWp lighter
Product warranty
12 yrs
10 yrs
2 yrs longer
Temperature coefficient
-0.370 %/°C
-0.360 %/°C
0.010 %/°C better in heat
Short-circuit current
13.79 A
13.29 A
0.50 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
TP615LG10B
19,660 kWh
TP590LG10TB
18,492 kWh
Lifetime gap
1,168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
TP615LG10B
TP590LG10TB
Standard test conditions
25 °C
100.0% of rated power
615 W
590 W
Cool, bright day
40 °C
94.5% of rated power
581 W
558 W
Typical summer roof
55 °C
88.9% of rated power
547 W
526 W
Hot roof
70 °C
83.3% of rated power
513 W
494 W
03
Full specification
Parameter
TP615LG10B
TP590LG10TB
Difference
Power and efficiency
Rated power
615 Wp
590 Wp
+25 W for TP615LG10B
Module efficiency
22.08 %
21.18 %
+0.90 pp for TP615LG10B
Power density
220.8 Wp/m²
211.8 Wp/m²
+9.0 Wp/m² for TP615LG10B
Open-circuit voltage
54.40 V
53.90 V
Effectively the same
Voltage at max power
46.68 V
46.18 V
Effectively the same
Short-circuit current
13.79 A
13.29 A
0.50 A apart
Current at max power
13.18 A
12.78 A
Effectively the same
Temperature
Temperature coefficient
-0.370 %/°C
-0.360 %/°C
+0.010 %/°C for TP590LG10TB
Mechanical
Dimensions
2456x1134x35 mm
2456x1134x35 mm
Same
Module area
2.785 m²
2.785 m²
Same
Weight
36.0 kg
31.0 kg
-5.0 kg for TP590LG10TB
Weight per kWp
58.5 kg/kWp
52.5 kg/kWp
-6.0 kg/kWp for TP590LG10TB
Warranty and degradation
Product warranty
12 yrs
10 yrs
+2 yrs for TP615LG10B
Performance warranty
30 yrs
25 yrs
+5 yrs for TP615LG10B
Annual degradation
0.60 %/yr
0.72 %/yr
-0.12 %/yr for TP615LG10B
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
#6,116
vs
#9,216
TP615LG10B leads by 3,100 places
Power density
#6,039
vs
#9,158
TP615LG10B leads by 3,119 places
Heat behaviour
#13,081
vs
#12,345
TP590LG10TB leads by 736 places
Weight
#11,776
vs
#6,152
TP590LG10TB leads by 5,624 places
Warranty
#21
vs
#9,798
TP615LG10B leads by 9,777 places
Overall
#3,822
vs
#7,138
TP615LG10B leads by 3,316 places
05
Open the full database
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The same specification on paper
06
Written summary
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07
Questions about this pairing
Which panel is better: Tata Power Solar TP615LG10B or Tata Power Solar TP590LG10TB?
According to our database: Tata Power Solar TP615LG10B has higher module efficiency (22.08% vs 21.18%); Tata Power Solar TP590LG10TB 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 TP615LG10B and Tata Power Solar TP590LG10TB?
Tata Power Solar TP615LG10B has a module efficiency of 22.08%, while Tata Power Solar TP590LG10TB is 21.18%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Tata Power Solar TP615LG10B use vs Tata Power Solar TP590LG10TB?
Tata Power Solar TP615LG10B uses PERC cells; Tata Power Solar TP590LG10TB 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 TP615LG10B and Tata Power Solar TP590LG10TB?
Tata Power Solar TP615LG10B has a 30 years power warranty; Tata Power Solar TP590LG10TB 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 TP615LG10B and Tata Power Solar TP590LG10TB bifacial panels?
Both Tata Power Solar TP615LG10B and Tata Power Solar TP590LG10TB 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.