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Seraphim Brand review

SRP-690-BTC-BG

690 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, heavy for its output

Rank 1,286 of 14,005
Compare panels Datasheet PDF
Power (Wp)
690
Strong · top 21%
Efficiency (%)
22.21
Typical · median 22.40%
Density (Wp/m²)
222.1
Typical · median 223.7
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
38.5
Weak · 3.9 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

Seraphim Sable 685-700W (TOPCon 210mm) is a series of modules designed for maximum energy generation from large installations, where every square meter and every hour of system operation counts. The use of N-type TOPCon cells helps to minimize power losses over time and maintain high efficiency even after years of operation. This series of modules is also distinguished by low temperature coefficient - which allows them to perform better in hot conditions, when standard panels experience a more significant drop in performance.

The 210mm format design has been optimized for reducing BOS (Balance of System) costs - fewer modules for the same power output mean shorter installation times, fewer connections, and simpler farm-level work. Another advantage is high bifaciality, which allows for more efficient use of reflected light, which is important in bright environments or with appropriately selected support structures. This is the ideal choice for PV farms and C&I projects, where predictability and scalability are key.

Ranking

249 panels in the segment TOPCon 650-700 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.21% 22.40% Typical 5,754
Power density 222.1 223.7 Typical 5,734
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 55.8 53.2 Weak · bottom 24% 10,180
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 1 caution
Best for

Utility-scale, commercial and hot-climate.

Not ideal for

Weight-limited structures.

Watch-outs
55.8 kg per kWp

Bottom 24% of the TOPCon 650-700 W segment, against a median of 53.2.

Notes from the database
  • At 22.2% efficiency, this panel is on par with typical TOPCon 650-700W modules
  • At 222.1 W/m² power density, roof space requirements are typical for TOPCon 650-700W panels
  • Temperature coefficient of -0.29%/°C matches the TOPCon 650-700W median
  • Weight of 38.5 kg is 3.9 kg above TOPCon 650-700W median (34.6 kg) - verify structural support
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 690 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.21 % Typical Segment median 22.40%
Vmpp · Impp 40.13 V · 17.20 A Operating point at max power
Voc · Isc 48.10 V · 18.24 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2384×1303×33 mm · 3.11 m² of roof
Weight 38.5 kg Weak Weak · 3.9 kg above median
Cells 132 · 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 603 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 690 Wp appear here. The rest cover the whole series.

Additional Value from Linear Warranty Additional Value from Linear Warranty Whole series I-V Curve — Irradiance Dependence (Cell Temperature 25°C) I-V Curve — Irradiance Dependence (Cell Temperature 25°C) 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-690-BTC-BG 690 W 22.21% -0.290 38.5 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg -40 W, lighter, +3.0 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg Cooler, lighter, +3.0 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg Cooler, lighter, +2.8 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg -45 W, lighter, +2.8 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg Cooler, lighter, +2.8 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg Cooler, lighter, +2.7 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Cooler, lighter, +2.6 pp
SRP-645-BMC-BG 645 W 20.76% -0.340 38.5 kg -45 W, hotter, -1.4 pp
SRP-650-BMC-BG 650 W 20.92% -0.340 38.5 kg -40 W, hotter, -1.3 pp
SRP-655-BMC-BG 655 W 21.09% -0.340 38.5 kg -35 W, hotter, -1.1 pp
SRP-660-BMC-HV 660 W 21.25% -0.340 32.2 kg Hotter, lighter, -5 yr warranty
SRP-665-BMC-HV 665 W 21.41% -0.340 32.2 kg Hotter, lighter, -5 yr warranty
AIKO-A805-GRH78Dw 805 W 25.10% -0.260 39.8 kg +115 W, cooler, +2.9 pp
AIKO-A800-GRH78Dw 800 W 24.90% -0.260 39.8 kg +110 W, cooler, +2.7 pp
AIKO-A795-GRH78Dw 795 W 24.80% -0.260 39.8 kg +105 W, cooler, +2.6 pp
AIKO-A790-GRH78Dw 790 W 24.60% -0.260 39.8 kg +100 W, cooler, +2.4 pp

Found 1390 panels of the same or similar size to this one, within ±10 mm. See them here Found 1400 panels of the same or similar size to this one, within ±25 mm. See them here Found 1400 panels of the same or similar size to this one, within ±50 mm. See them here Found 1432 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What warranty comes with the Seraphim Sable 685-700W TOPCon panels?
Seraphim provides a 15-year product warranty and a 30-year linear power output warranty on the Sable 685-700W series. Over three decades, the manufacturer guarantees a minimum power output level. For utility-scale solar farms and C&I projects where long-term yield predictability is critical, the extended power warranty is one of the most important selection criteria when evaluating module options.
Are Seraphim Sable 700W panels suitable for large-scale solar farms?
Yes, the Sable 685-700W series is designed primarily for utility-scale and C&I applications. The 210mm cell format with up to 700 W per module lets you reach the same system capacity with fewer panels, directly reducing BoS costs — fewer MC4 connectors, shorter installation time, and simpler on-site logistics. This translates into a lower LCOE for the overall project.
How does TOPCon technology in Seraphim Sable panels differ from standard PERC cells?
The N-type TOPCon cells used in the Sable series have a lower temperature coefficient (typically around -0.29%/°C) compared to PERC modules (around -0.35%/°C), meaning less power loss on hot days. TOPCon also shows lower LID and LeTID degradation rates, so the module retains output closer to its rated power for longer. This is why Seraphim backs these panels with a 30-year power warranty.
How do Seraphim Sable 685-700W modules perform in hot weather?
Very well. The N-type TOPCon cell technology gives the Sable series a low temperature coefficient, keeping efficiency high even when module operating temperature rises significantly. When panel temperature exceeds 25°C (STC reference point), power losses are smaller than with older PERC technology. For installations in climates with long, hot summers, this advantage delivers measurable gains in annual energy yield.
How does bifacial technology work in Seraphim Sable panels, and what does an investor gain?
Seraphim Sable modules are bifacial — the rear cell surface captures light reflected from the ground or a light-colored racking structure. On white gravel, light concrete, or a reflective membrane, bifacial gain can add several to over ten percent on top of the rated STC output. Ground-mounted systems (solar farms) typically benefit more than rooftop installations, especially when mounting height is optimized for rear-side irradiance.
How many Seraphim Sable 690W modules are needed to build a 1 MW solar farm?
At a rated output of 690 W per module, approximately 1,450 panels are needed to reach 1 MW. Thanks to the 210mm cell format and high per-module power, the Sable series requires fewer modules than older 182mm or smaller-format panels. This simplifies the electrical design, cuts installation time, and reduces BoS costs per installed megawatt of capacity.
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