--- title: "Silfab SIL-540-XM-BIFACIAL vs Silfab SIL-630 XL - Solar Panel Comparison | ComparePV" description: "Compare Silfab SIL-540-XM-BIFACIAL vs Silfab SIL-630 XL side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/silfab-sil-540-xm-bifacial/silfab-sil-630-xl" updated: 2026-09-11 --- # Silfab SIL-540-XM-BIFACIAL vs Silfab SIL-630 XL 630 XL leads on the differences that matter The largest is rated power: 90 W more power. 12 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Silfab SIL-540-XM-BIFACIAL](https://comparepv.com/panel/silfab-sil-540-xm-bifacial) | [Silfab SIL-630 XL](https://comparepv.com/panel/silfab-sil-630-xl) | | Manufacturer | Silfab | Silfab | | Power | 540 Wp | 630 Wp | | Efficiency | 22.70 % | 22.56 % | | Technology | N-type | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 540-XM-BIFACIAL | 630 XL | Difference | | --- | --- | --- | --- | | Rated power | 540 Wp | 630 Wp | +90 W for 630 XL | | Weight | 26.2 kg | 29.5 kg | -3.3 kg for 540-XM-BIFACIAL | | Open-circuit voltage | 47.95 V | 57.49 V | 9.54 V apart | | Module area | 2.377 m² | 2.793 m² | 0.416 m² apart | | Voltage at max power | 41.62 V | 48.47 V | 6.85 V apart | | Cell count | 132 | 156 | 24 cells apart | | Dimensions | 2098x1133x35 mm | 2465x1133x35 mm | 2098x1133x35 mm vs 2465x1133x35 mm | ## Every compared parameter | Parameter | 540-XM-BIFACIAL | 630 XL | | --- | --- | --- | | Rated power | 540 Wp | 630 Wp | | Module efficiency | 22.70 % | 22.56 % | | Power density | 227.2 Wp/m² | 225.6 Wp/m² | | Open-circuit voltage | 47.95 V | 57.49 V | | Voltage at max power | 41.62 V | 48.47 V | | Short-circuit current | 13.78 A | 13.66 A | | Current at max power | 12.97 A | 13.00 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 2098x1133x35 mm | 2465x1133x35 mm | | Module area | 2.377 m² | 2.793 m² | | Weight | 26.2 kg | 29.5 kg | | Weight per kWp | 48.5 kg/kWp | 46.8 kg/kWp | | Product warranty | 25 yrs | 25 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.30 %/yr | 0.30 %/yr | | Cell technology | N-type | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 156 | | 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 (-0.290 %/°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, 540-XM-BIFACIAL:** 18,206 kWh - **Cumulative output, 630 XL:** 21,240 kWh - **Gap:** 3,034 kWh ## Output when hot | Condition | Cell temperature | 540-XM-BIFACIAL | 630 XL | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 540 W | 630 W | 100.0% of rated power | | Cool, bright day | 40 °C | 517 W | 603 W | 95.7% of rated power | | Typical summer roof | 55 °C | 493 W | 575 W | 91.3% of rated power | | Hot roof | 70 °C | 470 W | 548 W | 87.0% of rated power | ## Against the whole database | Measure | 540-XM-BIFACIAL | 630 XL | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #3,307 | #3,899 | 14,005 | 540-XM-BIFACIAL leads by 592 places | | Power density | #3,251 | #3,867 | 14,005 | 540-XM-BIFACIAL leads by 616 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #2,336 | #1,365 | 14,005 | 630 XL leads by 971 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,857 | #1,032 | 14,005 | 630 XL leads by 1,825 places | ## Questions ### Which panel is better: Silfab SIL-540-XM-BIFACIAL or Silfab SIL-630 XL? According to our database: **Silfab SIL-540-XM-BIFACIAL** has higher module efficiency (**22.70%** vs **22.56%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Silfab SIL-540-XM-BIFACIAL and Silfab SIL-630 XL? **Silfab SIL-540-XM-BIFACIAL** has a module efficiency of **22.70%**, while **Silfab SIL-630 XL** is **22.56%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Silfab SIL-540-XM-BIFACIAL use vs Silfab SIL-630 XL? **Silfab SIL-540-XM-BIFACIAL** uses **N-type** cells; **Silfab SIL-630 XL** 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 Silfab SIL-540-XM-BIFACIAL and Silfab SIL-630 XL? **Silfab SIL-540-XM-BIFACIAL** has a **30 years** power warranty; **Silfab SIL-630 XL** 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 Silfab SIL-540-XM-BIFACIAL and Silfab SIL-630 XL bifacial panels? Both **Silfab SIL-540-XM-BIFACIAL** and **Silfab SIL-630 XL** 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 - [Silfab SIL-540-XM-BIFACIAL vs Silfab SIL-640 XL](https://comparepv.com/compare/silfab-sil-540-xm-bifacial/silfab-sil-640-xl) - 9 differences, the largest is rated power - [Silfab SIL-540-XM-BIFACIAL vs Silfab SIL-620 XL](https://comparepv.com/compare/silfab-sil-540-xm-bifacial/silfab-sil-620-xl) - 9 differences, the largest is rated power - [Silfab SIL-540-XM-BIFACIAL vs Silfab SIL-590 XM+](https://comparepv.com/compare/silfab-sil-540-xm-bifacial/silfab-sil-590-xm) - 7 differences, the largest is rated power - [Silfab SIL-540-XM-BIFACIAL vs Silfab SIL-580-XM+-BIFACIAL](https://comparepv.com/compare/silfab-sil-540-xm-bifacial/silfab-sil-580-xm-bifacial) - 8 differences, the largest is rated power - [Silfab SIL-540-XM-BIFACIAL vs Silfab SIL-570 XM+ BIFACIAL](https://comparepv.com/compare/silfab-sil-540-xm-bifacial/silfab-sil-570-xm-bifacial) - 9 differences, the largest is module efficiency - [Silfab SIL-540-XM-BIFACIAL vs Silfab SIL-570 XM+](https://comparepv.com/compare/silfab-sil-540-xm-bifacial/silfab-sil-570-xm) - 9 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/silfab-sil-540-xm-bifacial/silfab-sil-630-xl 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.