--- title: "Seraphim SEG-470-BTB-BG vs Seraphim SEG-485-BTB-BG - Solar Panel Comparison | ComparePV" description: "Compare Seraphim SEG-470-BTB-BG vs Seraphim SEG-485-BTB-BG side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/seraphim-seg-470-btb-bg/seraphim-seg-485-btb-bg" updated: 2026-09-11 --- # Seraphim SEG-470-BTB-BG vs Seraphim SEG-485-BTB-BG 485-BTB-BG leads on the differences that matter The largest is module efficiency: 0.69 pp more efficient. 14 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Seraphim SEG-470-BTB-BG](https://comparepv.com/panel/seraphim-seg-470-btb-bg) | [Seraphim SEG-485-BTB-BG](https://comparepv.com/panel/seraphim-seg-485-btb-bg) | | Manufacturer | Seraphim | Seraphim | | Power | 470 Wp | 485 Wp | | Efficiency | 21.71 % | 22.40 % | | Technology | TOPCon | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 470-BTB-BG | 485-BTB-BG | Difference | | --- | --- | --- | --- | | Module efficiency | 21.71 % | 22.40 % | +0.69 pp for 485-BTB-BG | | Power density | 217.1 Wp/m² | 224.0 Wp/m² | +6.9 Wp/m² for 485-BTB-BG | | Rated power | 470 Wp | 485 Wp | +15 W for 485-BTB-BG | | Cell technology | TOPCon | N-type | TOPCon vs N-type | | Annual degradation | 0.40 %/yr | 0.34 %/yr | -0.06 %/yr for 485-BTB-BG | ## Every compared parameter | Parameter | 470-BTB-BG | 485-BTB-BG | | --- | --- | --- | | Rated power | 470 Wp | 485 Wp | | Module efficiency | 21.71 % | 22.40 % | | Power density | 217.1 Wp/m² | 224.0 Wp/m² | | Open-circuit voltage | 42.80 V | 43.40 V | | Voltage at max power | 35.60 V | 36.20 V | | Short-circuit current | 13.88 A | 14.08 A | | Current at max power | 13.21 A | 13.40 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 1909x1134x30 mm | 1909x1134x30 mm | | Module area | 2.165 m² | 2.165 m² | | Weight | 27.3 kg | 27.3 kg | | Weight per kWp | 58.1 kg/kWp | 56.3 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.34 %/yr | | Cell technology | TOPCon | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 120 | 120 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, 470-BTB-BG:** 15,499 kWh - **Cumulative output, 485-BTB-BG:** 16,307 kWh - **Gap:** 808 kWh ## Output when hot | Condition | Cell temperature | 470-BTB-BG | 485-BTB-BG | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 470 W | 485 W | 100.0% of rated power | | Cool, bright day | 40 °C | 449 W | 463 W | 95.5% of rated power | | Typical summer roof | 55 °C | 428 W | 441 W | 91.0% of rated power | | Hot roof | 70 °C | 407 W | 420 W | 86.5% of rated power | ## Against the whole database | Measure | 470-BTB-BG | 485-BTB-BG | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #7,411 | #4,774 | 14,005 | 485-BTB-BG leads by 2,637 places | | Power density | #7,401 | #4,769 | 14,005 | 485-BTB-BG leads by 2,632 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #11,559 | #10,551 | 14,005 | 485-BTB-BG leads by 1,008 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #8,772 | #7,349 | 14,005 | 485-BTB-BG leads by 1,423 places | ## Questions ### Which panel is better: Seraphim SEG-470-BTB-BG or Seraphim SEG-485-BTB-BG? According to our database: **Seraphim SEG-485-BTB-BG** has higher module efficiency (**22.40%** vs **21.71%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Seraphim SEG-470-BTB-BG and Seraphim SEG-485-BTB-BG? **Seraphim SEG-470-BTB-BG** has a module efficiency of **21.71%**, while **Seraphim SEG-485-BTB-BG** is **22.40%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Seraphim SEG-470-BTB-BG use vs Seraphim SEG-485-BTB-BG? **Seraphim SEG-470-BTB-BG** uses **TOPCon** cells; **Seraphim SEG-485-BTB-BG** uses **N-type**. 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 SEG-470-BTB-BG and Seraphim SEG-485-BTB-BG? **Seraphim SEG-470-BTB-BG** has a **30 years** power warranty; **Seraphim SEG-485-BTB-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 SEG-470-BTB-BG and Seraphim SEG-485-BTB-BG bifacial panels? Both **Seraphim SEG-470-BTB-BG** and **Seraphim SEG-485-BTB-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. ## Related comparisons - [Seraphim SEG-470-BTB-BG vs Seraphim SEG-495-BTB-BG](https://comparepv.com/compare/seraphim-seg-470-btb-bg/seraphim-seg-495-btb-bg) - 8 differences, the largest is module efficiency - [Seraphim SEG-470-BTB-BG vs Seraphim SEG-490-BTB-BG](https://comparepv.com/compare/seraphim-seg-470-btb-bg/seraphim-seg-490-btb-bg) - 6 differences, the largest is module efficiency - [Seraphim SEG-470-BTB-BG vs Seraphim SEG-480-BTB-BG](https://comparepv.com/compare/seraphim-seg-470-btb-bg/seraphim-seg-480-btb-bg) - 5 differences, the largest is module efficiency - [Seraphim SEG-470-BTB-BG vs Seraphim SEG-475-BTB-BG](https://comparepv.com/compare/seraphim-seg-470-btb-bg/seraphim-seg-475-btb-bg) - One difference: module efficiency - [Seraphim SEG-470-BTB-BG vs Seraphim SEG-465-BTB-BG](https://comparepv.com/compare/seraphim-seg-470-btb-bg/seraphim-seg-465-btb-bg) - One difference: module efficiency - [Seraphim SEG-470-BTB-BG vs Seraphim SRP-730-BHC-BG](https://comparepv.com/compare/seraphim-seg-470-btb-bg/seraphim-srp-730-bhc-bg) - 15 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/seraphim-seg-470-btb-bg/seraphim-seg-485-btb-bg Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.