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720-BTC-BG vs 705-BHC-BG 10 of 19 identical Swap Change panels

Seraphim SRP-720-BTC-BG vs Seraphim SRP-705-BHC-BG

Seraphim SRP-720-BTC-BG
SRP-720-BTC-BG
720 Wp 23.18 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Seraphim SRP-705-BHC-BG
SRP-705-BHC-BG
705 Wp 22.70 % HJT Bifacial
Open panel page Datasheet PDF
The verdict

9 differences, and they point both ways

The largest is temperature coefficient: 0.032 %/°C better in heat. 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 720-BTC-BG 705-BHC-BG Difference
Temperature coefficient -0.290 %/°C -0.258 %/°C 0.032 %/°C better in heat
Module efficiency 23.18 % 22.70 % 0.48 pp more efficient
Annual degradation 0.40 %/yr 0.30 %/yr 0.10 %/yr slower
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
Cell technology TOPCon HJT TOPCon vs HJT
Short-circuit current 18.48 A 17.50 A 0.98 A apart
Open-circuit voltage 49.30 V 50.32 V 1.02 V apart
Current at max power 17.43 A 16.70 A 0.73 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
720-BTC-BG
24,157 kWh
705-BHC-BG
24,022 kWh
Lifetime gap
135 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 720-BTC-BG 705-BHC-BG
Standard test conditions 25 °C 100.0% of rated power 720 W 705 W
Cool, bright day 40 °C 95.7% of rated power 689 W 678 W
Typical summer roof 55 °C 91.3% of rated power 657 W 650 W
Hot roof 70 °C 87.0% of rated power 626 W 623 W
03

Full specification

Parameter 720-BTC-BG 705-BHC-BG Difference
Power and efficiency
Rated power 720 Wp 705 Wp +15 W for 720-BTC-BG
Module efficiency 23.18 % 22.70 % +0.48 pp for 720-BTC-BG
Power density 231.8 Wp/m² 227.0 Wp/m² +4.8 Wp/m² for 720-BTC-BG
Open-circuit voltage 49.30 V 50.32 V 1.02 V apart
Voltage at max power 41.33 V 42.30 V Effectively the same
Short-circuit current 18.48 A 17.50 A 0.98 A apart
Current at max power 17.43 A 16.70 A 0.73 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.258 %/°C +0.032 %/°C for 705-BHC-BG
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 54.6 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.30 %/yr -0.10 %/yr for 705-BHC-BG
Technology
Cell technology TOPCon HJT TOPCon vs HJT
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 #3,307
720-BTC-BG leads by 1,883 places
Power density
#1,347 vs #3,361
720-BTC-BG leads by 2,014 places
Heat behaviour
#2,165 vs #466
705-BHC-BG leads by 1,699 places
Weight
#7,424 vs #8,959
720-BTC-BG leads by 1,535 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#362 vs #771
720-BTC-BG leads by 409 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-690-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-705-BHC-BG?
According to our database: Seraphim SRP-720-BTC-BG has higher module efficiency (23.18% vs 22.70%); Seraphim SRP-705-BHC-BG tolerates heat better (temp coeff -0.258%/°C vs -0.290%/°C). 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-705-BHC-BG?
Seraphim SRP-720-BTC-BG has a module efficiency of 23.18%, while Seraphim SRP-705-BHC-BG is 22.70%. 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-705-BHC-BG?
Seraphim SRP-720-BTC-BG uses TOPCon cells; Seraphim SRP-705-BHC-BG uses HJT. 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-705-BHC-BG?
Seraphim SRP-720-BTC-BG has a 30 years power warranty; Seraphim SRP-705-BHC-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-705-BHC-BG bifacial panels?
Both Seraphim SRP-720-BTC-BG and Seraphim SRP-705-BHC-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.

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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.