--- title: "Fellow Energy FE72-18X 550W 550W Solar Panel - Specs & Review | ComparePV" description: "Fellow Energy FE72-18X 550W 550W solar panel. Specs: 21.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/fellow-energy-fe72-18x-550w" updated: 2026-09-11 --- # Fellow Energy FE72-18X 550W Strong in heat, short guarantee 589 panels in the segment PERC 550-600 W ## Identity - **Manufacturer:** Fellow Energy - **Model:** FE72-18X 550W - **Series:** FE72-18X - **Rated power:** 550 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 550-600 W (589 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 550 W | 560 W | Weak - bottom 15% | | | Module efficiency | 21.30% | 21.29% | Typical | 8,519 | | Power density | 212.8 | 212.9 | Typical | 8,643 | | Temperature coefficient | -0.326 | -0.350 | Strong - top 4% | 8,520 | | Weight (kg) | 27.4 kg | 30.8 kg | Strong - top 21% | | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.30% | 21.29% | Typical | 8,519 | | Power density | 212.8 | 212.9 | Typical | 8,643 | | Temperature coefficient | -0.326 | -0.350 | Strong - top 4% | 8,520 | | Weight per kWp | 49.8 | 52.7 | Strong - top 21% | 3,232 | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,798 | ### Strengths - **-0.326 %/°C temperature coefficient** - Top 4% of the PERC 550-600 W segment, against a median of -0.350. Ranked 8,520th in the whole database. - **49.8 kg per kWp** - Top 21% of the PERC 550-600 W segment, against a median of 52.7. ### Watch out for - **25 year performance warranty** - Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs. - **Best for:** Residential, commercial, shaded-installations and utility-scale. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 550 W - **Efficiency:** 21.30 % - **Voltage at Pmax (Vmp):** 41.95 V - **Current at Pmax (Imp):** 13.12 A - **Open-circuit voltage (Voc):** 49.80 V - **Short-circuit current (Isc):** 14.00 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.326 %/degC - **Temperature coefficient of Voc:** -0.258 %/degC - **Temperature coefficient of Isc:** 0.051 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 ### Physical - **Length:** 2279 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 27.4 kg - **Area:** 2.58 m2 - **Power density:** 212.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 86.0 % - **First-year degradation:** 2.50 % - **Annual degradation:** 0.48 % - **Output after 30 years:** 460 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8519 of 14005 | | Power density | 8643 of 14005 | | Temperature coefficient | 8520 of 14005 | | Weight | 3232 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **10BB half-cut with 182 mm cells** - Ten busbars combined with half-cut cell architecture reduce resistive losses and hot-spot risk. The M10 format (182×91 mm) delivers up to 560 Wp in a 2279×1134 mm footprint, favorably impacting LCOE for both residential and commercial installations. - **Triple EL inspection and ±2% current binning** - Three-pass electroluminescence testing detects microcracks and delamination before shipment. Current sorting at ±2% tolerance (vs. the typical industry ±3–5%) minimizes mismatch losses within the string, delivering a measurable boost to array-level yield. - **Mechanical ratings suited for Polish climate** - Certified snow load of 5,400 Pa and wind load of 2,400 Pa meet Polish climatic zone requirements per PN-EN 1991-1-3/1-4. IEC 61215:2016, IEC 61730:2016, and TÜV certifications provide third-party verification of structural performance. - **PID resistance and 1,500 V DC system voltage** - Built-in PID resistance protects long-term power output in high-potential systems. Support for 1,500 V DC enables longer strings (more modules per MPPT input), reducing cable runs and connectors — estimated BoS cost savings of 3–8% vs. 1,000 V DC systems. ## Cons - **Monofacial vs. bifacial peer comparables** - All three peer comparables in the same power class — Exiom EX540-560M(B), Premier Energies 144 HC PERC Bifacial Dual Glass, and DAH Solar DHM-T72X10/BF — are bifacial. The absence of rear-side generation means foregoing a potential 5–15% additional annual yield on installations with high-albedo surfaces (gravel, light concrete, snow). - **PERC technology in a declining market phase** - 2025 shipment data shows TOPCon reached ~88% share among the top-five module manufacturers, while PERC fell to ~10%. As Jinko, Trina, and LONGi phase out PERC production lines, sourcing compatible modules for system expansion and maintaining residual value may become progressively harder over a 5–10 year horizon. - **Limited track record vs. 25-year power warranty** - Fellow Energy has been operating since 2020 — roughly 5 years of operational history against a 25-year linear power warranty commitment. Despite Tier-1 bankable status, the lack of a long-term track record (cf. Trina Solar ~25 years, Jinko ~20 years) represents an additional risk factor when assessing the manufacturer's ability to honor warranty claims over the full warranty period. ## About this series The FE72-18X series from Fellow Energy comprises photovoltaic modules built on **large-format 182 x 91 mm monocrystalline PERC cells**, combining half-cut cell technology with a **10BB (ten busbar) configuration**. This layout effectively reduces internal losses, improves heat dissipation, and minimizes the risk of hot spots - resulting in higher reliability under partial shading conditions. **Low susceptibility to LID degradation** allows the panels to maintain stable performance throughout their service life. Every module undergoes triple EL (electroluminescence) testing, and current sorting with a 2% tolerance limits losses caused by cell mismatch within the string. The series performs well in both residential and commercial installations - withstanding snow loads of up to 5400 Pa and wind loads of up to 2400 Pa, making it a good choice for the Polish climate. **Resistance to the PID effect** and support for system voltages up to 1500 V DC enable the construction of longer strings and reduced BOS costs. The manufacturer provides a **15-year product warranty and a 25-year power output warranty**, and the module holds IEC61215, IEC61730, CE, and TUV certifications. ## Notable figures - Efficiency of 21.3% matches the \*\*PERC 550-600W\*\* median - Power density of 212.8 W/m² matches the \*\*PERC 550-600W\*\* median - At -0.33%/°C (vs median -0.35%/°C), loses ~1% less power in hot conditions - Weight of 27.4 kg (3.4 kg below \*\*PERC 550-600W\*\* median of 30.8 kg) allows easier transport and roof mounting - #8519 for efficiency, #8520 for temperature performance out of 14005 panels ## Questions ### What is the maximum power output of the Fellow Energy FE72-18X module and what does the 10BB configuration mean? FE72-18X modules reach a peak power output of up to 560 Wp. The 10BB configuration refers to ten busbars, which shorten current travel paths, reduce internal resistance, and improve charge carrier collection from the cells. In practice this means higher module efficiency, a lower risk of micro-cracks, and more durable electrical connections throughout the module's entire service life. ### Can Fellow Energy FE72-18X panels handle heavy snow loads and strong winds typical of Central European winters? Yes. The FE72-18X series is rated for snow loads up to 5,400 Pa and wind loads up to 2,400 Pa, meeting the mechanical requirements for the vast majority of locations in Poland, including mountainous regions with heavy snowfall. The aluminum frame and tempered-glass laminate maintain structural integrity throughout the service life without requiring additional frame reinforcement. ### How does the half-cut PERC technology on 182 mm cells affect system performance under partial shading? The half-cut design splits each PERC cell in two, so shading one half does not shut down the entire module. The large 182 × 91 mm cells generate higher current at the same cell count, and the 10BB configuration further reduces resistive losses. The result is significantly less power loss when shade falls on only part of the panel — a common scenario on roofs with chimneys, dormers, or antennas. ### What warranty does Fellow Energy provide on the FE72-18X series and what does it cover? Fellow Energy offers a 15-year product warranty covering material defects and workmanship. In addition, a 25-year power output warranty guarantees that the module retains a specified performance level for a quarter century. The modules carry IEC61215, IEC61730, CE, and TUV certifications, while built-in PID resistance protects against premature degradation caused by high system voltages. ### Do FE72-18X panels support 1,500 V DC system voltage, and what does that mean for commercial system design? Yes, the FE72-18X series supports system voltages up to 1,500 V DC. This allows longer strings — more modules in series per MPPT input — which meaningfully lowers BoS costs: shorter DC cable runs, fewer overcurrent protection devices, and fewer disconnects. For commercial and industrial installations where module counts are high, those BoS savings can be substantial. ### Is Fellow Energy a reliable manufacturer — what validates the quality of FE72-18X panels? Fellow Energy holds Tier 1 status, awarded to manufacturers independently verified for financial stability and product quality. Every FE72-18X module undergoes triple electroluminescence (EL) testing before shipment, and current-matched cell sorting within a 2% tolerance minimizes mismatch losses within the string. The company is headquartered in Turkey and holds IEC61215, IEC61730, CE, and TUV certifications. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/FE72-18X-9daa35dff239.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, +3.7 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, +3.5 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, +3.4 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +3.3 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | -50 W, cooler, +3.2 pp | | [Fellow Energy FE72-18X 540W](https://comparepv.com/panel/fellow-energy-fe72-18x-540w) | 540 W | -10 W, -0.4 pp | | [Fellow Energy FE72-18X 545W](https://comparepv.com/panel/fellow-energy-fe72-18x-545w) | 545 W | Very close match | | [Fellow Energy FE72-18X 555W](https://comparepv.com/panel/fellow-energy-fe72-18x-555w) | 555 W | Very close match | | [Fellow Energy FE72-18X 560W](https://comparepv.com/panel/fellow-energy-fe72-18x-560w) | 560 W | +10 W, +0.4 pp | | [Fellow Energy FE72-18X(ND)](https://comparepv.com/panel/fellow-energy-fe72-18x-nd) | 590 W | Heavier, +1.6 pp, +5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +100 W, cooler, +3.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +95 W, cooler, +3.7 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +85 W, cooler, +3.3 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +80 W, cooler, +3.1 pp | --- Source: https://comparepv.com/panel/fellow-energy-fe72-18x-550w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.