Skip to main content
BGT66(705)-G12 vs BWT66(705)-G12 14 of 19 identical Swap Change panels

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

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

BWT66(705)-G12 leads on the differences that matter

The largest is weight: 3.9 kg lighter. 14 of 19 comparable parameters are identical.

See all 5 differences
How alike are they
14 of 19 comparable
parameters are identical
identical differs
01

What actually differs

5 of 19 parameters
Parameter BGT66(705)-G12 BWT66(705)-G12 Difference
Weight 37.8 kg 33.9 kg 3.9 kg lighter
Weight per kWp 53.6 kg/kWp 48.1 kg/kWp 5.5 kg/kWp lighter
Temperature coefficient -0.300 %/°C -0.290 %/°C 0.010 %/°C better in heat
Cell technology N-type TOPCon N-type vs TOPCon
Open-circuit voltage 48.80 V 46.58 V 2.22 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
BGT66(705)-G12
23,654 kWh
BWT66(705)-G12
23,654 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario BGT66(705)-G12 BWT66(705)-G12
Standard test conditions 25 °C 100.0% of rated power 705 W 705 W
Cool, bright day 40 °C 95.5% of rated power 673 W 674 W
Typical summer roof 55 °C 91.0% of rated power 642 W 644 W
Hot roof 70 °C 86.5% of rated power 610 W 613 W
03

Full specification

Parameter BGT66(705)-G12 BWT66(705)-G12 Difference
Power and efficiency
Rated power 705 Wp 705 Wp Same
Module efficiency 22.70 % 22.70 % Same
Power density 227.0 Wp/m² 227.0 Wp/m² Same
Open-circuit voltage 48.80 V 46.58 V 2.22 V apart
Voltage at max power 40.70 V 39.92 V Effectively the same
Short-circuit current 18.36 A 18.80 A Effectively the same
Current at max power 17.33 A 17.66 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.290 %/°C +0.010 %/°C for BWT66(705)-G12
Mechanical
Dimensions 2384x1303x35 mm 2384x1303x35 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 37.8 kg 33.9 kg -3.9 kg for BWT66(705)-G12
Weight per kWp 53.6 kg/kWp 48.1 kg/kWp -5.5 kg/kWp for BWT66(705)-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 N-type TOPCon N-type vs TOPCon
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#3,307 vs #3,307
Tied - the same position in the database
Power density
#3,361 vs #3,361
Tied - the same position in the database
Heat behaviour
#6,093 vs #2,165
BWT66(705)-G12 leads by 3,928 places
Weight
#7,628 vs #2,052
BWT66(705)-G12 leads by 5,576 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#747 vs #678
BWT66(705)-G12 leads by 69 places
05

More useful comparisons

Open the full database
Same series, other bin
Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(720)-G12
3 differences, the largest is module efficiency
Same series, other bin
Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(715)-G12
3 differences, the largest is module efficiency
Same series, other bin
Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(710)-G12
One difference: module efficiency
Same series, other bin
Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(700)-G12
One difference: module efficiency
Same series, other bin
Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(620)-G11
8 differences, the largest is rated power
Same series, other bin
Sunova TS-BGT66(705)-G12 vs Sunova TS-BGT66(615)-G11
7 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: Sunova TS-BGT66(705)-G12 or Sunova TS-BWT66(705)-G12?
According to our database: Sunova TS-BWT66(705)-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-BGT66(705)-G12 and Sunova TS-BWT66(705)-G12?
Sunova TS-BGT66(705)-G12 has a module efficiency of 22.70%, while Sunova TS-BWT66(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-BGT66(705)-G12 use vs Sunova TS-BWT66(705)-G12?
Sunova TS-BGT66(705)-G12 uses N-type cells; Sunova TS-BWT66(705)-G12 uses TOPCon. 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(705)-G12 and Sunova TS-BWT66(705)-G12?
Sunova TS-BGT66(705)-G12 has a 30 years power warranty; Sunova TS-BWT66(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-BGT66(705)-G12 and Sunova TS-BWT66(705)-G12 bifacial panels?
Both Sunova TS-BGT66(705)-G12 and Sunova TS-BWT66(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.