--- title: "Seraphim SRP-440-BTD-HV 440W Solar Panel - Specs & Review | ComparePV" description: "Seraphim SRP-440-BTD-HV 440W solar panel. Specs: 22.53% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/seraphim-srp-440-btd-hv" updated: 2026-09-11 --- # Seraphim SRP-440-BTD-HV Efficiency leader, no clear weak spot 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Seraphim - **Model:** SRP-440-BTD-HV - **Series:** Nebula - **Rated power:** 440 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 440 W | 435 W | Typical | | | Module efficiency | 22.53% | 22.00% | Strong - top 7% | 3,982 | | Power density | 225.3 | 220.2 | Strong - top 8% | 4,099 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 21.0 kg | 22.0 kg | Strong - top 17% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.53% | 22.00% | Strong - top 7% | 3,982 | | Power density | 225.3 | 220.2 | Strong - top 8% | 4,099 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 47.7 | 51.4 | Strong - top 17% | 1,829 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **22.53% module efficiency** - Top 7% of the TOPCon 400-450 W segment, against a median of 22.00%. Ranked 3,982nd in the whole database. - **225.3 watts per square metre** - Top 8% of the TOPCon 400-450 W segment, against a median of 220.2. Ranked 4,099th in the whole database. - **47.7 kg per kWp** - Top 17% of the TOPCon 400-450 W segment, against a median of 51.4. - **Best for:** Commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 440 W - **Efficiency:** 22.53 % - **Voltage at Pmax (Vmp):** 32.70 V - **Current at Pmax (Imp):** 13.47 A - **Open-circuit voltage (Voc):** 39.30 V - **Short-circuit current (Isc):** 14.15 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/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:** 108 - **Bifacial:** yes ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 28 mm - **Weight:** 21.0 kg - **Area:** 1.95 m2 - **Power density:** 225.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 385 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3982 of 14005 | | Power density | 4099 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 1829 of 14005 | | Warranty | 21 of 14005 | ## About this series The Seraphim Nebula panel series introduces a new level of quality to PV installations thanks to the use of **N-TOPCon cells**, which are characterized by significantly lower degradation and better efficiency than traditional solutions. It is a response to the needs of investors requiring maximum yields even on cloudy days, which is crucial in the Polish climate. A key differentiator of the series is **bifacial energy generation**, which, combined with a glass-glass construction, allows for additional power recovery from reflected radiation. Thanks to this, Nebula is ideal for commercial projects and ground-mounted farms where the lowest levelized cost of energy matters most. Compared to the competition, these panels offer **exceptional resistance to LID and LeTID phenomena**, which translates into long-term reliability and financial stability for the investment. The robust construction protects against micro-cracks, and the **optimized temperature coefficient** ensures high performance during summer peak sunlight periods. Choosing this series is an investment in **advanced double-glass technology**, which combines aesthetic design with extreme resistance to snow and wind loads, guaranteeing peace of mind for years. ## Notable figures - At 22.5% efficiency, this panel is 0.5pp above typical \*\*TOPCon 400-450W\*\* modules (median: 22.0%) - Power density of 225.3 W/m² packs 5.1 W/m² more into the same footprint vs \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 400-450W\*\* median - At 21.0 kg, weight matches the \*\*TOPCon 400-450W\*\* median - #3982 for efficiency, #2165 for temperature performance out of 14005 panels ## Questions ### How do Seraphim Nebula panels differ from standard PERC panels? The Seraphim Nebula series uses N-TOPCon cells instead of conventional PERC cells. N-TOPCon technology delivers higher efficiency (up to ~22.5%), significantly lower first-year light-induced degradation (LID), and better high-temperature performance. In practice, this means more energy generated over the system's lifetime and more stable output on overcast days — a key advantage in climates with frequent cloud cover. ### How much additional energy does the bifacial Seraphim Nebula generate from its rear side? The Seraphim Nebula (up to 440 Wp) is a bifacial module that captures reflected irradiance from the ground or rooftop surface. With sufficient albedo — such as light-colored gravel on a ground-mount system — rear-side gain can reach 5–15% additional annual yield. The bifaciality factor is approximately 80–90%, making the Nebula series particularly cost-effective for utility-scale and commercial ground-mount projects where LCOE optimization matters. ### What warranty does the Seraphim Nebula carry, and what does it cover? Seraphim provides two warranties for the Nebula series: a 15-year product warranty covering material defects and workmanship, and a 30-year linear power warranty guaranteeing at least 84.95% of rated output after 30 years of operation. Warranty claims can be handled through an authorized local distributor or directly via Seraphim's global service network. ### Do Seraphim Nebula panels perform well in cloudy conditions and low temperatures? Yes. N-TOPCon cell technology delivers superior low-light performance compared to PERC modules, capturing more energy from diffuse irradiance on overcast days. The optimized temperature coefficient reduces power losses during summer heat. The glass-glass dual-glass construction protects cells from moisture ingress and freeze-thaw cycles, adding long-term reliability in climates with heavy rainfall, cloud cover, and winter frost. ### Can the glass-glass construction of the Seraphim Nebula withstand heavy snow loads? Yes. The dual-glass structure is engineered for extreme mechanical loads. Modules of this type are typically certified for snow loads up to 5,400 Pa and wind loads up to 2,400 Pa — values that comfortably meet building code requirements in most European markets, including mountainous regions with heavy snowfall. Refer to the Seraphim Nebula datasheet for exact certified load ratings. ### Is the Seraphim Nebula better suited for rooftop or ground-mount installations? The Seraphim Nebula is versatile, performing well in both configurations. It delivers the greatest bifacial gain in ground-mount and flat-roof commercial installations, where rear-side irradiance from ground albedo is maximized. For residential pitched-roof installs, its approximately 21 kg weight and 1722 × 1134 × 28 mm dimensions are compatible with standard racking systems, keeping installation straightforward. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ccb044296b19459a3934d1c0a1872e74-95dea8bd124d.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +50 W, cooler, +2.0 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | +50 W, cooler, +2.0 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +45 W, cooler, +1.8 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +45 W, cooler, +1.8 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +45 W, cooler, +1.8 pp | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | +45 W, cooler, +1.8 pp | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 W | +45 W, heavier, +1.8 pp | | [Seraphim SRP-395-BMD-HV](https://comparepv.com/panel/seraphim-srp-395-bmd-hv) | 395 W | Hotter, -2.3 pp, -5 yr warranty | | [Seraphim SRP-400-BMD-BG](https://comparepv.com/panel/seraphim-srp-400-bmd-bg) | 400 W | -40 W, hotter, -2.1 pp | | [Seraphim SRP-405-BMD-BG](https://comparepv.com/panel/seraphim-srp-405-bmd-bg) | 405 W | -35 W, hotter, -1.8 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +70 W, cooler, +2.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +55 W, cooler, +2.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +65 W, cooler, +2.2 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +60 W, cooler, +2.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +60 W, cooler, +2.0 pp | --- Source: https://comparepv.com/panel/seraphim-srp-440-btd-hv Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.