SpolarPV SPV660-TG12-132BD vs SpolarPV SPV685-TG12-132BD
VS
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 differencesHow alike are they
13
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
6 of 19 parameters
What actually differs
Parameter
SPV660-TG12-132BD
SPV685-TG12-132BD
Difference
Module efficiency
21.28 %
22.08 %
0.80 pp more efficient
Power density
212.7 Wp/m²
220.8 Wp/m²
8.1 Wp/m² higher
Rated power
660 Wp
685 Wp
25 W more power
Weight per kWp
57.6 kg/kWp
55.5 kg/kWp
2.1 kg/kWp lighter
Open-circuit voltage
46.10 V
47.65 V
1.55 V apart
Voltage at max power
38.81 V
39.83 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.
SPV660-TG12-132BD
21,717 kWh
SPV685-TG12-132BD
22,540 kWh
Lifetime gap
823 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
SPV660-TG12-132BD
SPV685-TG12-132BD
Standard test conditions
25 °C
100.0% of rated power
660 W
685 W
Cool, bright day
40 °C
95.5% of rated power
630 W
654 W
Typical summer roof
55 °C
91.0% of rated power
601 W
623 W
Hot roof
70 °C
86.5% of rated power
571 W
593 W
03
Full specification
Parameter
SPV660-TG12-132BD
SPV685-TG12-132BD
Difference
Power and efficiency
Rated power
660 Wp
685 Wp
+25 W for SPV685-TG12-132BD
Module efficiency
21.28 %
22.08 %
+0.80 pp for SPV685-TG12-132BD
Power density
212.7 Wp/m²
220.8 Wp/m²
+8.1 Wp/m² for SPV685-TG12-132BD
Open-circuit voltage
46.10 V
47.65 V
1.55 V apart
Voltage at max power
38.81 V
39.83 V
1.02 V apart
Short-circuit current
17.84 A
18.25 A
Effectively the same
Current at max power
17.01 A
17.21 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
57.6 kg/kWp
55.5 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
14,005 panels
Against the whole database
Efficiency
#8,795
vs
#6,116
SPV685-TG12-132BD leads by 2,679 places
Power density
#8,718
vs
#6,042
SPV685-TG12-132BD leads by 2,676 places
Heat behaviour
#6,093
vs
#6,093
Tied - the same position in the database
Weight
#11,284
vs
#9,876
SPV685-TG12-132BD leads by 1,408 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#3,149
vs
#1,718
SPV685-TG12-132BD leads by 1,431 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: SpolarPV SPV660-TG12-132BD or SpolarPV SPV685-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 SPV660-TG12-132BD and SpolarPV SPV685-TG12-132BD?
SpolarPV SPV660-TG12-132BD has a module efficiency of 21.28%, while SpolarPV SPV685-TG12-132BD is 22.08%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does SpolarPV SPV660-TG12-132BD use vs SpolarPV SPV685-TG12-132BD?
SpolarPV SPV660-TG12-132BD uses TOPCon cells; SpolarPV SPV685-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 SPV660-TG12-132BD and SpolarPV SPV685-TG12-132BD?
SpolarPV SPV660-TG12-132BD has a 30 years power warranty; SpolarPV SPV685-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 SPV660-TG12-132BD and SpolarPV SPV685-TG12-132BD bifacial panels?
Both SpolarPV SPV660-TG12-132BD and SpolarPV SPV685-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.