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SPV685-TG12-132BD vs SPV660-TG12-132BD 13 of 19 identical Swap Change panels

SpolarPV SPV685-TG12-132BD vs SpolarPV SPV660-TG12-132BD

SpolarPV SPV685-TG12-132BD
SpolarPV
SPV685-TG12-132BD
685 Wp 22.08 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
SpolarPV
SPV660-TG12-132BD
660 Wp 21.28 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

SPV685-TG12-132BD leads on the differences that matter

The largest is module efficiency: 0.80 pp more efficient. 13 of 19 comparable parameters are identical.

See all 6 differences
How alike are they
13 of 19 comparable
parameters are identical
identical differs
01

What actually differs

6 of 19 parameters
Parameter SPV685-TG12-132BD SPV660-TG12-132BD Difference
Module efficiency 22.08 % 21.28 % 0.80 pp more efficient
Power density 220.8 Wp/m² 212.7 Wp/m² 8.1 Wp/m² higher
Rated power 685 Wp 660 Wp 25 W more power
Weight per kWp 55.5 kg/kWp 57.6 kg/kWp 2.1 kg/kWp lighter
Open-circuit voltage 47.65 V 46.10 V 1.55 V apart
Voltage at max power 39.83 V 38.81 V 1.02 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 (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
SPV685-TG12-132BD
22,540 kWh
SPV660-TG12-132BD
21,717 kWh
Lifetime gap
823 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario SPV685-TG12-132BD SPV660-TG12-132BD
Standard test conditions 25 °C 100.0% of rated power 685 W 660 W
Cool, bright day 40 °C 95.5% of rated power 654 W 630 W
Typical summer roof 55 °C 91.0% of rated power 623 W 601 W
Hot roof 70 °C 86.5% of rated power 593 W 571 W
03

Full specification

Parameter SPV685-TG12-132BD SPV660-TG12-132BD Difference
Power and efficiency
Rated power 685 Wp 660 Wp +25 W for SPV685-TG12-132BD
Module efficiency 22.08 % 21.28 % +0.80 pp for SPV685-TG12-132BD
Power density 220.8 Wp/m² 212.7 Wp/m² +8.1 Wp/m² for SPV685-TG12-132BD
Open-circuit voltage 47.65 V 46.10 V 1.55 V apart
Voltage at max power 39.83 V 38.81 V 1.02 V apart
Short-circuit current 18.25 A 17.84 A Effectively the same
Current at max power 17.21 A 17.01 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.300 %/°C Same
Mechanical
Dimensions 2383x1302x30 mm 2383x1302x30 mm Same
Module area 3.103 m² 3.103 m² Same
Weight 38.0 kg 38.0 kg Same
Weight per kWp 55.5 kg/kWp 57.6 kg/kWp -2.1 kg/kWp for SPV685-TG12-132BD
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.46 %/yr 0.46 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#6,116 vs #8,795
SPV685-TG12-132BD leads by 2,679 places
Power density
#6,042 vs #8,718
SPV685-TG12-132BD leads by 2,676 places
Heat behaviour
#6,093 vs #6,093
Tied - the same position in the database
Weight
#9,876 vs #11,284
SPV685-TG12-132BD leads by 1,408 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,718 vs #3,149
SPV685-TG12-132BD leads by 1,431 places
05

More useful comparisons

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06

Written summary

07

Questions about this pairing

Which panel is better: SpolarPV SPV685-TG12-132BD or SpolarPV SPV660-TG12-132BD?
According to our database: SpolarPV SPV685-TG12-132BD has higher module efficiency (22.08% vs 21.28%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of SpolarPV SPV685-TG12-132BD and SpolarPV SPV660-TG12-132BD?
SpolarPV SPV685-TG12-132BD has a module efficiency of 22.08%, while SpolarPV SPV660-TG12-132BD is 21.28%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does SpolarPV SPV685-TG12-132BD use vs SpolarPV SPV660-TG12-132BD?
SpolarPV SPV685-TG12-132BD uses TOPCon cells; SpolarPV SPV660-TG12-132BD 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 SpolarPV SPV685-TG12-132BD and SpolarPV SPV660-TG12-132BD?
SpolarPV SPV685-TG12-132BD has a 30 years power warranty; SpolarPV SPV660-TG12-132BD 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 SpolarPV SPV685-TG12-132BD and SpolarPV SPV660-TG12-132BD bifacial panels?
Both SpolarPV SPV685-TG12-132BD and SpolarPV SPV660-TG12-132BD 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.