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Seraphim SRP-520-BTD-BG
Seraphim Brand review

SRP-520-BTD-BG

520 Wp TOPCon Bifacial 80%
ComparePV verdict

Efficiency leader, no clear weak spot

Rank 4,903 of 14,005
Compare panels Datasheet PDF
Power (Wp)
520
Typical for its class
Efficiency (%)
23.37
Strong · top 11%
Density (Wp/m²)
233.7
Strong · top 11%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
27.8
Typical · median 27.0 kg
Warranty (yrs)
30
Typical · median 30 yrs

Seraphim Sable is a series of modules based on N-type TOPCon cells, designed to achieve high energy yields even under less-than-ideal conditions. Thanks to passivated contacts and a multi-busbar architecture, the panels efficiently "collect" current from the cells and perform better in shaded or low-light conditions - which is a significant advantage in the Polish climate, leading to more stable daily energy production.

In practice, Sable solves a common problem for investors: how to increase yield without adding more modules. This is facilitated by the glass-to-glass bifacial design, which can also utilize reflected light from the ground, while also improving resistance to environmental factors. Another key feature is the focus on low power degradation over time, which makes it easier to plan the long-term profitability of the installation.

It is a good choice for residential and commercial installations, as well as ground-mounted projects - anywhere where high production, durability, and predictability are important.

Ranking

432 panels in the segment TOPCon 500-550 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.37% 22.73% Strong · top 11% 930
Power density 233.7 227.4 Strong · top 11% 919
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 53.5 52.4 Typical 7,408
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

2 positive · 0 caution
Best for

Commercial, utility-scale and shaded-installations.

Strengths
23.37% module efficiency

Top 11% of the TOPCon 500-550 W segment, against a median of 22.73%.

233.7 watts per square metre

Top 11% of the TOPCon 500-550 W segment, against a median of 227.4.

Notes from the database
  • Efficiency of 23.4% is 0.6pp above the TOPCon 500-550W median (22.7%)
  • 233.7 W/m² power density - 6.3 W/m² more than TOPCon 500-550W median (227.4 W/m²), more power per roof area
  • At -0.29%/°C, hot weather performance is typical for TOPCon 500-550W panels
  • 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
  • Ranked #930 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 520 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.37 % Strong Segment median 22.73%
Vmpp · Impp 34.11 V · 15.25 A Operating point at max power
Voc · Isc 40.83 V · 16.08 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1962×1134×30 mm · 2.22 m² of roof
Weight 27.8 kg Typical Typical · median 27.0 kg
Cells 108 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.046 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 454 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Seraphim in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 520 Wp appear here. The rest cover the whole series.

I-V Curve (Incident Irradiance variation) I-V Curve (Incident Irradiance variation) Whole series I-V Curve (Cell Temperature variation) I-V Curve (Cell Temperature variation) Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.290 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Seraphim SRP-520-BTD-BG 520 W 23.37% -0.290 27.8 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, lighter, +1.6 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, lighter, +1.4 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg +40 W, cooler, +1.4 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, lighter, +1.3 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg +35 W, cooler, +1.2 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg -30 W, lighter, +1.1 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, lighter, +1.1 pp
SRP-495-BTD-BG 495 W 22.25% -0.290 27.8 kg -25 W, -1.1 pp
SRP-500-BTD-BG 500 W 22.47% -0.290 27.8 kg -20 W, -0.9 pp
SRP-505-BTD-BG 505 W 22.70% -0.290 27.8 kg -15 W, -0.7 pp
SRP-510-BTD-BG 510 W 22.92% -0.290 27.8 kg -10 W, -0.4 pp
SRP-515-BTD-BG 515 W 23.15% -0.290 27.8 kg -0.2 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg +30 W, lighter, +1.0 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg Cooler, lighter, +1.0 pp
GK-5-60HG-540M 540 W 24.40% -0.260 23.3 kg Cooler, lighter, +1.0 pp
JKM545-54QL6-DV-F1-EU 545 W 24.27% -0.260 27.5 kg +25 W, cooler, +0.9 pp

Found 471 panels of the same or similar size to this one, within ±10 mm. See them here Found 505 panels of the same or similar size to this one, within ±25 mm. See them here Found 657 panels of the same or similar size to this one, within ±50 mm. See them here Found 1471 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty does the Seraphim Sable series come with?
The Sable series includes a 15-year product warranty covering defects in materials and workmanship, plus a 30-year power output warranty. After 30 years, Seraphim guarantees at least 84.95% of the rated power. Thanks to TOPCon technology, annual degradation sits at approximately 0.4%, making long-term yield forecasting straightforward for system owners and investors.
What is TOPCon technology and why choose Seraphim Sable over older PERC panels?
TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell design where a thin silicon oxide layer reduces carrier recombination losses. Sable panels deliver higher conversion efficiency than standard PERC cells and a lower temperature coefficient of around -0.29%/°C, meaning smaller power losses on hot days. LID-related initial degradation is below 1%, stabilizing at roughly 0.4% per year thereafter.
Do Seraphim Sable panels perform well in overcast conditions and low irradiance, typical of Northern European climates?
Yes. The multi-busbar architecture shortens current-flow paths between cells and reduces resistive losses at low irradiance. N-type TOPCon cells also show high sensitivity to diffuse light. This translates into measurably better energy yield during cloudy mornings and afternoons, which account for a significant share of production hours in Central and Northern Europe.
What is the maximum power output of the Seraphim Sable module, and will a 720 Wp panel fit on a typical residential roof?
The top variant of the Sable series reaches 720 Wp using 210 mm cells with module efficiency exceeding 23%. This is a large-format panel primarily suited for ground-mount and commercial rooftop installations. For residential projects, Seraphim offers smaller variants within the same Sable series compatible with standard racking systems — confirm the available model with your installer.
Is Seraphim a reliable manufacturer? Where are they based and are they Tier 1?
Seraphim Solar is a Chinese PV manufacturer headquartered in Nantong, operating since 2011 and holding Tier 1 status as recognized by independent rating agencies including BNEF. Tier 1 classification indicates bank-financeable track record and consistent manufacturing capacity, which significantly lowers long-term warranty risk for the system owner.
What temperature range can Seraphim Sable panels handle, and do they work well in winter?
Sable panels are certified for an operating temperature range of -40°C to +85°C, so cold winters pose no risk whatsoever. In fact, N-type TOPCon cells have a lower temperature coefficient than PERC technology, meaning cold but sunny winter days can be especially productive — low ambient temperature reduces thermal losses and boosts output relative to rated STC conditions.
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