--- title: "Silfab SIL-590 XM+ 590W Solar Panel - Specs & Review | ComparePV" description: "Silfab SIL-590 XM+ 590W solar panel. Specs: 22.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/silfab-sil-590-xm" updated: 2026-09-11 --- # Silfab SIL-590 XM+ Space saver, no clear weak spot 260 panels in the segment N-type 550-600 W ## Identity - **Manufacturer:** Silfab - **Model:** SIL-590 XM+ - **Series:** NTC Commercial - **Rated power:** 590 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 550-600 W (260 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 590 W | 580 W | Strong - top 15% | | | Module efficiency | 22.80% | 22.45% | Strong - top 20% | 2,714 | | Power density | 228.6 | 224.5 | Strong - top 12% | 2,463 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 28.5 kg | 29.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.80% | 22.45% | Strong - top 20% | 2,714 | | Power density | 228.6 | 224.5 | Strong - top 12% | 2,463 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 48.3 | 52.3 | Typical | 2,190 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **228.6 watts per square metre** - Top 12% of the N-type 550-600 W segment, against a median of 224.5. - **22.80% module efficiency** - Top 20% of the N-type 550-600 W segment, against a median of 22.45%. - **Best for:** Commercial and utility-scale. ## Specification ### Electrical - **Rated power (Pmax):** 590 W - **Efficiency:** 22.80 % - **Voltage at Pmax (Vmp):** 44.79 V - **Current at Pmax (Imp):** 13.17 A - **Open-circuit voltage (Voc):** 52.50 V - **Short-circuit current (Isc):** 13.91 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2278 mm - **Width:** 1133 mm - **Thickness:** 35 mm - **Weight:** 28.5 kg - **Area:** 2.58 m2 - **Power density:** 228.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 89.3 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.32 % - **Output after 30 years:** 523 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2714 of 14005 | | Power density | 2463 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 2190 of 14005 | | Warranty | 21 of 14005 | ## About this series The Silfab NTC Commercial series is a lineup of photovoltaic modules built on next-generation N-type cells, designed specifically for commercial installations - from warehouse and industrial rooftops to mid-size and utility-scale PV arrays. The **TOPCon technology** used here delivers noticeably better energy yield than conventional PERC cells, particularly under diffuse light and high operating temperatures, translating into real gains in energy production under typical Polish climate conditions. The **half-cut cell** design with a dual-row layout reduces power losses from partial shading and improves mechanical durability, while select variants also offer **bifacial technology**, capturing additional light reflected from the ground surface. The series stands out for its **low degradation rate** throughout the module's lifetime and consistent performance validated by independent lab testing, supporting a predictable LCOE for investors. It's a solid choice for installation companies and C&I project developers looking for modules that combine high power density, long-term reliability, and a favorable BoS cost balance per square meter of roof or ground space. ## Notable figures - At 22.8% efficiency, this panel is on par with typical \*\*N-type 550-600W\*\* modules - Power density of 228.6 W/m² packs 4.1 W/m² more into the same footprint vs \*\*N-type 550-600W\*\* median (224.5 W/m²) - Temperature coefficient of -0.29%/°C matches the \*\*N-type 550-600W\*\* median - At 28.5 kg, weight matches the \*\*N-type 550-600W\*\* median - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### What is TOPCon technology in Silfab NTC Commercial panels and does it offer a real advantage over PERC? TOPCon (Tunnel Oxide Passivated Contact) is the N-type cell technology used in the Silfab NTC Commercial series, which reduces surface recombination losses in the cell. In practice this means higher module efficiency, better performance under diffuse light, and a smaller power drop at high operating temperatures compared to classic PERC cells. For commercial installations, this translates into a higher real energy yield from the same roof or ground area. ### How does the bifacial variant of the Silfab NTC Commercial series differ from a standard mono-facial panel? Bifacial panels in the NTC Commercial series have an active rear side that captures light reflected off the ground, roof, or a bright surface beneath the mounting structure. With proper installation, such as light-colored gravel or membrane, this can add several percent of extra energy without increasing the installation footprint. The effect is more pronounced with elevated mounting and high-albedo surroundings than on sloped roofs with dark roofing material. ### What warranty covers Silfab NTC Commercial panels and what exactly does it include? The NTC Commercial series is covered by a 25-year product warranty and a 30-year linear power performance warranty, among the longest terms currently offered in the PV module market. The product warranty covers material and workmanship defects, while the power warranty guarantees a defined level of energy generation over time, helping C&I investors accurately forecast return on investment. ### Do Silfab NTC Commercial panels perform well in low temperatures and low-light conditions typical of a Central European climate? Yes, this is one of the strengths of the N-type cells used in this series. Compared to PERC cells, TOPCon technology maintains higher efficiency under diffuse light, common in fall and winter, and loses power more slowly as module operating temperature rises in summer. The result is more stable energy production throughout the year, not just under ideal irradiance conditions. ### What type of installations is the Silfab NTC Commercial series suited for - would it work on a warehouse roof? The NTC Commercial series was designed for commercial and industrial installations, including warehouse and manufacturing facility roofs as well as medium and large-scale PV farms. The half-cut cell construction with a double cell row increases mechanical durability and limits losses from partial shading, such as from rooftop ventilation units or technical equipment, which is common on industrial buildings. ### Is Silfab a Tier 1 manufacturer and where are NTC Commercial series panels made? Yes, Silfab Solar holds Tier 1 manufacturer status, indicating documented financial stability and bankability for financing institutions backing PV projects. The company is headquartered in Canada and is one of the few manufacturers with significant production scale in North America, meaning production outside the main Asian supply chain and alignment with support programs that favor supplier diversification. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Silfab-SIL-590-XM-Bifacial-Data-Final-884e2d749974.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -30 W, lighter, +2.0 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +50 W, cooler, +2.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -35 W, lighter, +1.8 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +45 W, cooler, +1.8 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +40 W, heavier, +1.6 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | -40 W, lighter, +1.6 pp | | [Silfab SIL-570 XM+ BIFACIAL](https://comparepv.com/panel/silfab-sil-570-xm-bifacial) | 570 W | -20 W, -0.7 pp | | [Silfab SIL-580-XM+-BIFACIAL](https://comparepv.com/panel/silfab-sil-580-xm-bifacial) | 580 W | -10 W, -0.4 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +60 W, cooler, +2.4 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +55 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/silfab-sil-590-xm Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.