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BGT66(615)-G11 vs BGT66(620)-G11 18 of 19 identical Swap Change panels

Sunova TS-BGT66(615)-G11 vs Sunova TS-BGT66(620)-G11

TS-BGT66(615)-G11
615 Wp 22.80 % N-type Bifacial
Open panel page Datasheet PDF
VS
TS-BGT66(620)-G11
620 Wp 23.00 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

BGT66(620)-G11 leads on the differences that matter

The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.

See the one difference
How alike are they
18 of 19 comparable
parameters are identical
identical differs
01

What actually differs

1 of 19 parameters
Parameter BGT66(615)-G11 BGT66(620)-G11 Difference
Module efficiency 22.80 % 23.00 % 0.20 pp more efficient
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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
BGT66(615)-G11
20,634 kWh
BGT66(620)-G11
20,802 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario BGT66(615)-G11 BGT66(620)-G11
Standard test conditions 25 °C 100.0% of rated power 615 W 620 W
Cool, bright day 40 °C 95.7% of rated power 588 W 593 W
Typical summer roof 55 °C 91.3% of rated power 561 W 566 W
Hot roof 70 °C 87.0% of rated power 535 W 539 W
03

Full specification

Parameter BGT66(615)-G11 BGT66(620)-G11 Difference
Power and efficiency
Rated power 615 Wp 620 Wp Effectively the same
Module efficiency 22.80 % 23.00 % +0.20 pp for BGT66(620)-G11
Power density 227.7 Wp/m² 229.5 Wp/m² Effectively the same
Open-circuit voltage 49.30 V 49.60 V Effectively the same
Voltage at max power 40.98 V 41.22 V Effectively the same
Short-circuit current 15.89 A 15.92 A Effectively the same
Current at max power 14.98 A 15.03 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2382x1134x35 mm 2382x1134x35 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 32.5 kg 32.5 kg Same
Weight per kWp 52.8 kg/kWp 52.4 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology N-type N-type Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#2,714 vs #1,919
BGT66(620)-G11 leads by 795 places
Power density
#3,077 vs #2,191
BGT66(620)-G11 leads by 886 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#6,546 vs #5,893
BGT66(620)-G11 leads by 653 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,324 vs #2,030
BGT66(620)-G11 leads by 294 places
05

More useful comparisons

Open the full database
Same series, other bin
Sunova TS-BGT66(615)-G11 vs Sunova TS-BGT66(720)-G12
9 differences, the largest is rated power
Same series, other bin
Sunova TS-BGT66(615)-G11 vs Sunova TS-BGT66(715)-G12
8 differences, the largest is rated power
Same series, other bin
Sunova TS-BGT66(615)-G11 vs Sunova TS-BGT66(710)-G12
7 differences, the largest is rated power
Same series, other bin
Sunova TS-BGT66(615)-G11 vs Sunova TS-BGT66(705)-G12
7 differences, the largest is rated power
Same series, other bin
Sunova TS-BGT66(615)-G11 vs Sunova TS-BGT66(700)-G12
8 differences, the largest is rated power
Same series, other bin
Sunova TS-BGT66(615)-G11 vs Sunova TS-BGT66(610)-G11
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Sunova TS-BGT66(615)-G11 or Sunova TS-BGT66(620)-G11?
According to our database: Sunova TS-BGT66(620)-G11 has higher module efficiency (23.00% vs 22.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Sunova TS-BGT66(615)-G11 and Sunova TS-BGT66(620)-G11?
Sunova TS-BGT66(615)-G11 has a module efficiency of 22.80%, while Sunova TS-BGT66(620)-G11 is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Sunova TS-BGT66(615)-G11 use vs Sunova TS-BGT66(620)-G11?
Sunova TS-BGT66(615)-G11 uses N-type cells; Sunova TS-BGT66(620)-G11 uses N-type. 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 Sunova TS-BGT66(615)-G11 and Sunova TS-BGT66(620)-G11?
Sunova TS-BGT66(615)-G11 has a 30 years power warranty; Sunova TS-BGT66(620)-G11 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 Sunova TS-BGT66(615)-G11 and Sunova TS-BGT66(620)-G11 bifacial panels?
Both Sunova TS-BGT66(615)-G11 and Sunova TS-BGT66(620)-G11 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.