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BWT66(720)-G12 vs BGT66(705)-G12 10 of 19 identical Swap Change panels

Sunova TS-BWT66(720)-G12 vs Sunova TS-BGT66(705)-G12

TS-BWT66(720)-G12
720 Wp 23.20 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
TS-BGT66(705)-G12
705 Wp 22.70 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

BWT66(720)-G12 leads on the differences that matter

The largest is module efficiency: 0.50 pp more efficient. 10 of 19 comparable parameters are identical.

See all 9 differences
How alike are they
10 of 19 comparable
parameters are identical
identical differs
01

What actually differs

9 of 19 parameters
Parameter BWT66(720)-G12 BGT66(705)-G12 Difference
Module efficiency 23.20 % 22.70 % 0.50 pp more efficient
Weight 33.9 kg 37.8 kg 3.9 kg lighter
Weight per kWp 47.1 kg/kWp 53.6 kg/kWp 6.5 kg/kWp lighter
Power density 231.8 Wp/m² 227.0 Wp/m² 4.8 Wp/m² higher
Rated power 720 Wp 705 Wp 15 W more power
Temperature coefficient -0.290 %/°C -0.300 %/°C 0.010 %/°C better in heat
Cell technology TOPCon N-type TOPCon vs N-type
Open-circuit voltage 46.73 V 48.80 V 2.07 V apart
Short-circuit current 18.98 A 18.36 A 0.62 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
BWT66(720)-G12
24,157 kWh
BGT66(705)-G12
23,654 kWh
Lifetime gap
503 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario BWT66(720)-G12 BGT66(705)-G12
Standard test conditions 25 °C 100.0% of rated power 720 W 705 W
Cool, bright day 40 °C 95.5% of rated power 689 W 673 W
Typical summer roof 55 °C 91.0% of rated power 657 W 642 W
Hot roof 70 °C 86.5% of rated power 626 W 610 W
03

Full specification

Parameter BWT66(720)-G12 BGT66(705)-G12 Difference
Power and efficiency
Rated power 720 Wp 705 Wp +15 W for BWT66(720)-G12
Module efficiency 23.20 % 22.70 % +0.50 pp for BWT66(720)-G12
Power density 231.8 Wp/m² 227.0 Wp/m² +4.8 Wp/m² for BWT66(720)-G12
Open-circuit voltage 46.73 V 48.80 V 2.07 V apart
Voltage at max power 40.54 V 40.70 V Effectively the same
Short-circuit current 18.98 A 18.36 A 0.62 A apart
Current at max power 17.76 A 17.33 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.300 %/°C +0.010 %/°C for BWT66(720)-G12
Mechanical
Dimensions 2384x1303x35 mm 2384x1303x35 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 33.9 kg 37.8 kg -3.9 kg for BWT66(720)-G12
Weight per kWp 47.1 kg/kWp 53.6 kg/kWp -6.5 kg/kWp for BWT66(720)-G12
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 TOPCon N-type TOPCon vs N-type
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,306 vs #3,307
BWT66(720)-G12 leads by 2,001 places
Power density
#1,347 vs #3,361
BWT66(720)-G12 leads by 2,014 places
Heat behaviour
#2,165 vs #6,093
BWT66(720)-G12 leads by 3,928 places
Weight
#1,496 vs #7,628
BWT66(720)-G12 leads by 6,132 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#327 vs #747
BWT66(720)-G12 leads by 420 places
05

More useful comparisons

Open the full database
Same series, other bin
Sunova TS-BWT66(720)-G12 vs Sunova TS-BGT66(720)-G12
6 differences, the largest is weight
Same series, other bin
Sunova TS-BWT66(720)-G12 vs Sunova TS-BGT66(715)-G12
7 differences, the largest is weight
Same series, other bin
Sunova TS-BWT66(720)-G12 vs Sunova TS-BWT66(715)-G12
One difference: module efficiency
Same series, other bin
Sunova TS-BWT66(720)-G12 vs Sunova TS-BGT66(710)-G12
9 differences, the largest is weight
Same series, other bin
Sunova TS-BWT66(720)-G12 vs Sunova TS-BWT66(710)-G12
3 differences, the largest is module efficiency
Same series, other bin
Sunova TS-BWT66(720)-G12 vs Sunova TS-BWT66(705)-G12
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Sunova TS-BWT66(720)-G12 or Sunova TS-BGT66(705)-G12?
According to our database: Sunova TS-BWT66(720)-G12 has higher module efficiency (23.20% vs 22.70%); Sunova TS-BWT66(720)-G12 tolerates heat better (temp coeff -0.290%/°C vs -0.300%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Sunova TS-BWT66(720)-G12 and Sunova TS-BGT66(705)-G12?
Sunova TS-BWT66(720)-G12 has a module efficiency of 23.20%, while Sunova TS-BGT66(705)-G12 is 22.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Sunova TS-BWT66(720)-G12 use vs Sunova TS-BGT66(705)-G12?
Sunova TS-BWT66(720)-G12 uses TOPCon cells; Sunova TS-BGT66(705)-G12 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-BWT66(720)-G12 and Sunova TS-BGT66(705)-G12?
Sunova TS-BWT66(720)-G12 has a 30 years power warranty; Sunova TS-BGT66(705)-G12 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-BWT66(720)-G12 and Sunova TS-BGT66(705)-G12 bifacial panels?
Both Sunova TS-BWT66(720)-G12 and Sunova TS-BGT66(705)-G12 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.