--- title: "Fellow Energy FE72-18X(ND) 590W Solar Panel - Specs & Review | ComparePV" description: "Fellow Energy FE72-18X(ND) 590W solar panel. Specs: 22.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/fellow-energy-fe72-18x-nd" updated: 2026-09-11 --- # Fellow Energy FE72-18X(ND) Efficiency leader, weak in heat 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Fellow Energy - **Model:** FE72-18X(ND) - **Series:** FE72-18X(ND) - **Rated power:** 590 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 550-600 W (1018 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 590 W | 580 W | Strong - top 18% | | | Module efficiency | 22.90% | 22.44% | Strong - top 12% | 2,359 | | Power density | 228.4 | 224.4 | Strong - top 17% | 2,598 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight (kg) | 32.5 kg | 31.2 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.90% | 22.44% | Strong - top 12% | 2,359 | | Power density | 228.4 | 224.4 | Strong - top 17% | 2,598 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight per kWp | 55.1 | 53.8 | Typical | 9,503 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **22.90% module efficiency** - Top 12% of the TOPCon 550-600 W segment, against a median of 22.44%. - **228.4 watts per square metre** - Top 17% of the TOPCon 550-600 W segment, against a median of 224.4. ### Watch out for - **-0.310 %/°C temperature coefficient** - Bottom 10% of the TOPCon 550-600 W segment, against a median of -0.290. - **Best for:** Residential, commercial and hot-climate. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 590 W - **Efficiency:** 22.90 % - **Voltage at Pmax (Vmp):** 43.50 V - **Current at Pmax (Imp):** 13.59 A - **Open-circuit voltage (Voc):** 51.70 V - **Short-circuit current (Isc):** 14.55 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.310 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 144 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.5 kg - **Area:** 2.58 m2 - **Power density:** 228.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **Output after 30 years:** 516 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2359 of 14005 | | Power density | 2598 of 14005 | | Temperature coefficient | 8005 of 14005 | | Weight | 9503 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Highest efficiency among peer comparables** - Module efficiency of 22.9% exceeds all three direct peers: Horay Solar HS 182-144 TC-D Ocean (22.8%), Talesun TM7G72M BIPRO (22.8%), and AE Solar HORIZON CMD-144BDS (22.86%). Higher energy yield per unit of roof area translates to a lower installed cost per kWp for the end customer. - **N-TOPCon: zero LID, low Tcoeff -0.29%/°C** - N-type cell architecture inherently eliminates Light Induced Degradation (LID), which reduces power output by 1–3% in conventional P-type PERC modules during initial sun exposure. The Pmax temperature coefficient of -0.29%/°C compares favorably against the typical PERC range of -0.34 to -0.35%/°C — at a cell temperature of 70°C, power loss is approximately 14.5% vs. ~17% for legacy PERC technology. - **Bifacial glass-glass with measurable energy gain** - Dual-glass construction eliminates moisture ingress associated with polymer backsheets, extending mechanical service life. Bifaciality adds real-world energy yield from reflected irradiance (albedo): on typical concrete or gravel surfaces (albedo 0.2–0.3), annual energy production increases by 5–15% compared to an equivalent monofacial module. - **30-year linear power warranty at 87.4%** - The manufacturer guarantees ≥99% of rated power after year 1 and ≥87.4% after 30 years, implying annual degradation ≤0.4%/year. While peer Talesun TM7G72M matches the 30-year term, standard P-type PERC market warranties are typically 25 years with an 84.8% end-of-life threshold — making the FE72-18X(ND) warranty meaningfully superior to the prior technology generation. - **Tier-1 bankable – project finance eligible** - Fellow Energy holds Tier-1 bankable status, making its modules acceptable to lenders in non-recourse project finance. The company operates 3 manufacturing facilities with 2.1 GW of annual production capacity, providing supply chain stability for commercial and utility-scale installations. ## Cons - **15-year product warranty – below Tier-1 leader standard** - The workmanship and materials warranty is 15 years, whereas leading Tier-1 manufacturers — LONGi Hi-MO 9, JA Solar DeepBlue 4.0, Trina Vertex N, Jinko Tiger Neo — all provide a 25-year product warranty as standard. The 10-year gap is material in project finance due diligence and long-horizon LCOE calculations. - **Short operational track record – founded 2020** - Fellow Energy has approximately 5 years of operating history (est. 2020), making it more difficult to independently verify the credibility of its 30-year power warranty commitment compared to manufacturers with 15–25 years of documented performance history (e.g., Jinko Solar est. 2006, JA Solar est. 2005). This represents standard counterparty risk for long-DSCR project financing. ## About this series The FE72-18X(ND) series from Fellow Energy comprises modern photovoltaic modules based on **N-TOPCon technology**, which fundamentally sets them apart from conventional P-type panels. N-type cells are inherently free from the LID effect - i.e., light-induced degradation - which means more stable and higher energy production throughout the entire lifecycle of the installation. The **double-glass (glass-glass) construction** provides exceptional mechanical resistance and effective protection against moisture and soiling, extending module lifespan even under the demanding weather conditions typical of Poland. Modules in this series generate up to 30% more energy than classic P-type panels, especially in hot conditions, thanks to their **low temperature coefficient** - they lose significantly less power as temperature rises compared to standard modules on the market. This is particularly important in the context of increasingly frequent heat waves in Poland. The series is designed both for rooftop installations on single-family homes and for commercial and industrial facilities, where reliability and long-term productivity are of key importance. A **30-year linear power warranty** guaranteeing up to 87.4% of the original output confirms the high build quality and durability of this technology - making it an excellent choice for informed investors focused on proven, future-ready photovoltaic solutions. ## Notable figures - Efficiency of 22.9% matches the \*\*TOPCon 550-600W\*\* median - At 228.4 W/m² power density, this panel generates 4.0 W/m² more per unit area than \*\*TOPCon 550-600W\*\* median (224.4 W/m²) - Temperature coefficient of -0.31%/°C is 0.02pp worse than \*\*TOPCon 550-600W\*\* median (-0.29%/°C) - higher losses in summer heat - At 32.5 kg, this panel is 1.3 kg heavier than the \*\*TOPCon 550-600W\*\* median (31.2 kg) - more demanding for installation crews - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### What is the maximum power output of the Fellow Energy FE72-18X(ND) and what systems is it suited for? The FE72-18X(ND) series reaches a maximum power output of 590 Wp, making it suitable for residential rooftop installations as well as commercial and industrial projects. The high per-module wattage means fewer panels are needed to reach a target system size, reducing costs for racking, wiring, and balance-of-system (BoS) components. ### What does bifacial mean for the FE72-18X(ND) and is it useful on a typical roof? Bifacial means the module generates power from both the front and rear surfaces. The glass-glass construction of this series allows light reflected from the mounting surface to reach the rear side of the cells, boosting energy yield. On pitched roofs the bifacial gain is limited, but the glass-glass design also provides superior moisture resistance and mechanical durability, extending the module's operational lifespan. ### What warranties come with the Fellow Energy FE72-18X(ND) series? Fellow Energy offers a 15-year product warranty covering manufacturing defects and a 30-year linear power warranty. After 30 years the module retains at least 87.4% of its nominal power output. The linear warranty structure means degradation is spread evenly over the entire period, with no steep power drop in the early years of operation. ### How does the N-TOPCon technology in the FE72-18X(ND) differ from standard PERC panels? N-TOPCon cells are built on an N-type silicon substrate, which is inherently free from LID (light-induced degradation) — an issue common in P-type PERC cells. This translates to more stable energy production from day one. N-TOPCon also has a lower temperature coefficient, so on hot days these modules lose significantly less power output compared to a standard PERC module. ### Do the FE72-18X(ND) panels perform well during heat waves and in variable climates? Yes. The low temperature coefficient of N-TOPCon technology means the FE72-18X(ND) series loses far less power as temperature rises compared to conventional P-type modules — the manufacturer cites up to 30% higher production advantage in hot conditions. The glass-glass bifacial construction also protects against moisture ingress and rapid thermal cycling typical of Central European weather. ### Is Fellow Energy a reliable manufacturer and are FE72-18X(ND) modules Tier 1 rated? Yes, Fellow Energy holds Tier 1 manufacturer status, recognized by independent industry agencies as a financially stable and technically credible PV module producer. The company is headquartered in Turkey. Tier 1 status is relevant when seeking project financing and provides greater confidence that the manufacturer will honor its long-term warranty commitments. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/FE72-18XND-a61b9832b517.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +1.9 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +50 W, lighter, +1.9 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +1.7 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | Cooler, lighter, +1.7 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +40 W, cooler, +1.5 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, 16 kg lighter, +1.5 pp | | [Fellow Energy FE72-18X 540W](https://comparepv.com/panel/fellow-energy-fe72-18x-540w) | 540 W | -50 W, lighter, -2.0 pp | | [Fellow Energy FE72-18X 545W](https://comparepv.com/panel/fellow-energy-fe72-18x-545w) | 545 W | Lighter, -1.8 pp, -5 yr warranty | | [Fellow Energy FE72-18X 550W](https://comparepv.com/panel/fellow-energy-fe72-18x-550w) | 550 W | Lighter, -1.6 pp, -5 yr warranty | | [Fellow Energy FE72-18X 555W](https://comparepv.com/panel/fellow-energy-fe72-18x-555w) | 555 W | Lighter, -1.4 pp, -5 yr warranty | | [Fellow Energy FE72-18X 560W](https://comparepv.com/panel/fellow-energy-fe72-18x-560w) | 560 W | Lighter, -1.2 pp, -5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +60 W, lighter, +2.3 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +55 W, lighter, +2.1 pp | --- Source: https://comparepv.com/panel/fellow-energy-fe72-18x-nd 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.