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720-BTC-BG vs 690-BTC-BG 13 of 19 identical Swap Change panels

Seraphim SRP-720-BTC-BG vs Seraphim SRP-690-BTC-BG

Seraphim SRP-720-BTC-BG
SRP-720-BTC-BG
720 Wp 23.18 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
SRP-690-BTC-BG
690 Wp 22.21 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

720-BTC-BG leads on the differences that matter

The largest is module efficiency: 0.97 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 720-BTC-BG 690-BTC-BG Difference
Module efficiency 23.18 % 22.21 % 0.97 pp more efficient
Power density 231.8 Wp/m² 222.1 Wp/m² 9.7 Wp/m² higher
Rated power 720 Wp 690 Wp 30 W more power
Weight per kWp 53.5 kg/kWp 55.8 kg/kWp 2.3 kg/kWp lighter
Open-circuit voltage 49.30 V 48.10 V 1.20 V apart
Voltage at max power 41.33 V 40.13 V 1.20 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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
720-BTC-BG
24,157 kWh
690-BTC-BG
23,151 kWh
Lifetime gap
1,006 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 720-BTC-BG 690-BTC-BG
Standard test conditions 25 °C 100.0% of rated power 720 W 690 W
Cool, bright day 40 °C 95.7% of rated power 689 W 660 W
Typical summer roof 55 °C 91.3% of rated power 657 W 630 W
Hot roof 70 °C 87.0% of rated power 626 W 600 W
03

Full specification

Parameter 720-BTC-BG 690-BTC-BG Difference
Power and efficiency
Rated power 720 Wp 690 Wp +30 W for 720-BTC-BG
Module efficiency 23.18 % 22.21 % +0.97 pp for 720-BTC-BG
Power density 231.8 Wp/m² 222.1 Wp/m² +9.7 Wp/m² for 720-BTC-BG
Open-circuit voltage 49.30 V 48.10 V 1.20 V apart
Voltage at max power 41.33 V 40.13 V 1.20 V apart
Short-circuit current 18.48 A 18.24 A Effectively the same
Current at max power 17.43 A 17.20 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2384x1303x33 mm 2384x1303x33 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 38.5 kg 38.5 kg Same
Weight per kWp 53.5 kg/kWp 55.8 kg/kWp -2.3 kg/kWp for 720-BTC-BG
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 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
#1,424 vs #5,754
720-BTC-BG leads by 4,330 places
Power density
#1,347 vs #5,734
720-BTC-BG leads by 4,387 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#7,424 vs #10,180
720-BTC-BG leads by 2,756 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#362 vs #1,286
720-BTC-BG leads by 924 places
05

More useful comparisons

Open the full database
Same series, other bin
Seraphim SRP-720-BTC-BG vs Seraphim SRP-715-BTC-BG
The same specification on paper
Same series, other bin
Seraphim SRP-720-BTC-BG vs Seraphim SRP-710-BTC-BG
3 differences, the largest is module efficiency
Same series, other bin
Seraphim SRP-720-BTC-BG vs Seraphim SRP-705-BTC-BG
3 differences, the largest is module efficiency
Same series, other bin
Seraphim SRP-720-BTC-BG vs Seraphim SRP-700-BTC-BG
3 differences, the largest is module efficiency
Same series, other bin
Seraphim SRP-720-BTC-BG vs Seraphim SRP-695-BTC-BG
5 differences, the largest is module efficiency
Same series, other bin
Seraphim SRP-720-BTC-BG vs Seraphim SRP-685-BTC-BG
6 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Seraphim SRP-720-BTC-BG or Seraphim SRP-690-BTC-BG?
According to our database: Seraphim SRP-720-BTC-BG has higher module efficiency (23.18% vs 22.21%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Seraphim SRP-720-BTC-BG and Seraphim SRP-690-BTC-BG?
Seraphim SRP-720-BTC-BG has a module efficiency of 23.18%, while Seraphim SRP-690-BTC-BG is 22.21%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Seraphim SRP-720-BTC-BG use vs Seraphim SRP-690-BTC-BG?
Seraphim SRP-720-BTC-BG uses TOPCon cells; Seraphim SRP-690-BTC-BG 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 Seraphim SRP-720-BTC-BG and Seraphim SRP-690-BTC-BG?
Seraphim SRP-720-BTC-BG has a 30 years power warranty; Seraphim SRP-690-BTC-BG 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 Seraphim SRP-720-BTC-BG and Seraphim SRP-690-BTC-BG bifacial panels?
Both Seraphim SRP-720-BTC-BG and Seraphim SRP-690-BTC-BG 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.

Shop prices: See 4 Seraphim offers

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.