--- title: "Seraphim SEG-475-BTB-BG 475W Solar Panel - Specs & Review | ComparePV" description: "Seraphim SEG-475-BTB-BG 475W solar panel. Specs: 21.94% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/seraphim-seg-475-btb-bg" updated: 2026-09-11 --- # Seraphim SEG-475-BTB-BG Middle of its segment, heavy for its output 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Seraphim - **Model:** SEG-475-BTB-BG - **Series:** YUKON N Series - **Rated power:** 475 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 475 W | 465 W | Typical | | | Module efficiency | 21.94% | 22.52% | Weak - bottom 16% | 6,751 | | Power density | 219.4 | 225.2 | Weak - bottom 16% | 6,709 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight (kg) | 27.3 kg | 24.0 kg | Weak - bottom 5% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.94% | 22.52% | Weak - bottom 16% | 6,751 | | Power density | 219.4 | 225.2 | Weak - bottom 16% | 6,709 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight per kWp | 57.5 | 52.2 | Weak - bottom 5% | 11,245 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **57.5 kg per kWp** - Bottom 5% of the TOPCon 450-500 W segment, against a median of 52.2. Ranked 11,245th in the whole database. - **219.4 watts per square metre** - Bottom 16% of the TOPCon 450-500 W segment, against a median of 225.2. - **21.94% module efficiency** - Bottom 16% of the TOPCon 450-500 W segment, against a median of 22.52%. - **Best for:** Residential, commercial, hot-climate and shaded-installations. - **Not ideal for:** Weight-limited structures, roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 475 W - **Efficiency:** 21.94 % - **Voltage at Pmax (Vmp):** 35.80 V - **Current at Pmax (Imp):** 13.27 A - **Open-circuit voltage (Voc):** 43.00 V - **Short-circuit current (Isc):** 13.94 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 120 - **Bifacial:** yes ### Physical - **Length:** 1909 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 27.3 kg - **Area:** 2.16 m2 - **Power density:** 219.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 2.60 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 408 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6751 of 14005 | | Power density | 6709 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 11245 of 14005 | | Warranty | 21 of 14005 | ## About this series The Seraphim YUKON N Series introduces a new level of quality to modern photovoltaic installations thanks to the extensive use of **N-type cells in TOPCon technology**. This solution effectively eliminates the problem of light-induced degradation (LID), which translates into a significantly longer module lifespan and stability of energy yields over decades of use. These panels feature an **exceptionally low temperature coefficient**, which means they operate extremely efficiently even on hot summer days when standard modules lose a significant portion of their rated power. The YUKON N Series design also guarantees **above-average efficiency in low-light conditions**, which is a key advantage in the specific conditions of the Polish climate, especially during the autumn-winter period. It is an ideal choice for investors seeking a maximum return on investment in residential building projects and large industrial farms. The use of innovative **multi-busbar technology** effectively minimizes the risk of micro-cracks and optimizes current flow within the cell. Compared to market competitors, this series stands out with a **lower Levelized Cost of Energy (LCOE)**, offering advanced premium technology while maintaining an optimal investment budget. Choosing these modules ensures long-term reliability and full energy security for any type of PV system. ## Notable figures - Module efficiency of 21.9% is 0.6pp below average for \*\*TOPCon 450-500W\*\* panels (median: 22.5%) - 219.4 W/m² power density is 5.8 W/m² below \*\*TOPCon 450-500W\*\* median (225.2 W/m²) - requires larger installation area - Temperature coefficient of -0.30%/°C matches the \*\*TOPCon 450-500W\*\* median - At 27.3 kg, this panel is 3.3 kg heavier than the \*\*TOPCon 450-500W\*\* median (24.0 kg) - more demanding for installation crews - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### How do Seraphim YUKON N Series panels perform on hot days – do they lose power at high temperatures? Thanks to N-type TOPCon cells, the YUKON N Series has an exceptionally low temperature coefficient of approximately -0.30%/°C, compared to -0.35%/°C typical of standard PERC modules. This means that at 45°C, a YUKON N panel loses significantly less power output than a conventional module. For owners in sunny climates, this translates into measurably higher energy yields during peak summer months. ### What warranty does the Seraphim YUKON N Series come with? Seraphim provides a 15-year product warranty covering manufacturing defects and a 30-year linear power output warranty. The TOPCon N-type cell structure keeps annual degradation rates lower than PERC alternatives, ensuring stable energy production throughout the entire 30-year guarantee period. Seraphim holds Tier 1 status per Bloomberg NEF classification, which supports project bankability and insurance requirements. ### How does the TOPCon technology in the YUKON N Series differ from standard PERC cells? TOPCon (Tunnel Oxide Passivated Contact) cells use an N-type silicon substrate instead of P-type, which eliminates Light Induced Degradation (LID) and achieves higher conversion efficiency – typically above 22% at the module level. Compared to PERC, the result is better low-light performance, a lower temperature coefficient, and a longer effective service life with less power decline over the years. ### Do bifacial YUKON N Series panels actually deliver extra yield in real-world conditions? Yes. With a bifaciality factor of 70–85%, real-world bifacial gain typically ranges from 5–15% depending on ground albedo. Light-colored surfaces such as gravel, white membranes, or snow reflect irradiance onto the rear side of the module and increase total output. The rated power of up to 495 Wp refers to the front side only under STC, so actual system yield in favorable conditions can be meaningfully higher. ### How do Seraphim YUKON N Series panels perform under low-light conditions – overcast skies and short winter days? Low-light performance is one of the core strengths of N-type TOPCon technology. At irradiance levels of 200–400 W/m², typical of overcast northern European winters, these cells maintain a higher short-circuit current ratio than PERC modules, resulting in more energy production per installed kilowatt-peak. The multi-busbar design further minimizes resistive losses and reduces sensitivity to partial shading. ### Are Seraphim YUKON N Series panels suitable for residential rooftops or are they designed for utility-scale projects? The series is engineered for both segments. With up to 495 Wp per module and high module efficiency, YUKON N panels maximize generation on the limited roof area of a residential home while also delivering a competitive LCOE in large ground-mounted and industrial rooftop installations. Tier 1 manufacturer status simplifies project financing and meets the bankability criteria required by most commercial lenders and insurers. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/SEG465480BTBBG182EN-f0666405cb94.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +3.1 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.9 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +2.8 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.6 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +2.6 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +2.6 pp | | [Seraphim SRP-440-BMB-HV](https://comparepv.com/panel/seraphim-srp-440-bmb-hv) | 440 W | Lighter, -1.6 pp, -5 yr warranty | | [Seraphim SRP-445-BMB-BG](https://comparepv.com/panel/seraphim-srp-445-bmb-bg) | 445 W | -30 W, hotter, -1.4 pp | | [Seraphim SRP-450-BMB-BG](https://comparepv.com/panel/seraphim-srp-450-bmb-bg) | 450 W | -25 W, hotter, -1.2 pp | | [Seraphim SRP-455-BMB-BG](https://comparepv.com/panel/seraphim-srp-455-bmb-bg) | 455 W | -20 W, hotter, -0.9 pp | | [Seraphim SRP-460-BMB-HV](https://comparepv.com/panel/seraphim-srp-460-bmb-hv) | 460 W | Hotter, lighter, -5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +85 W, cooler, +2.9 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +80 W, cooler, +2.7 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +75 W, lighter, +2.5 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +65 W, cooler, +2.5 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +65 W, lighter, +2.5 pp | --- Source: https://comparepv.com/panel/seraphim-seg-475-btb-bg Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.