--- title: "Meyer Burger MB_WG144Cyz_555 555W Solar Panel - Specs & Review | ComparePV" description: "Meyer Burger MB_WG144Cyz_555 555W solar panel. Specs: 20.60% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/meyer-burger-mb-wg144cyz-555" updated: 2026-09-11 --- # Meyer Burger MB\_WG144Cyz\_555 Middle of its segment, modest efficiency 32 panels in the segment HJT 550-600 W ## Identity - **Manufacturer:** Meyer Burger - **Model:** MB\_WG144Cyz\_555 - **Series:** Meyer Burger Panel+ White XL - **Rated power:** 555 W - **Cell technology:** HJT - **Bifacial:** yes ## How it compares Compared against segment HJT 550-600 W (32 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 555 W | 585 W | Weak - bottom 5% | | | Module efficiency | 20.60% | 22.48% | Weak - bottom 5% | 11,093 | | Power density | 206.1 | 224.8 | Weak - bottom 5% | 11,096 | | Temperature coefficient | -0.259 | -0.240 | Typical | 480 | | Weight (kg) | 34.4 kg | 32.6 kg | Weak - bottom 11% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.60% | 22.48% | Weak - bottom 5% | 11,093 | | Power density | 206.1 | 224.8 | Weak - bottom 5% | 11,096 | | Temperature coefficient | -0.259 | -0.240 | Typical | 480 | | Weight per kWp | 62.0 | 55.2 | Weak - bottom 11% | 12,725 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **20.60% module efficiency** - Bottom 5% of the HJT 550-600 W segment, against a median of 22.48%. Ranked 11,093rd in the whole database. - **206.1 watts per square metre** - Bottom 5% of the HJT 550-600 W segment, against a median of 224.8. Ranked 11,096th in the whole database. - **62.0 kg per kWp** - Bottom 11% of the HJT 550-600 W segment, against a median of 55.2. - **Best for:** Residential, commercial and hot-climate. - **Not ideal for:** Tight roof space, roofs where every square metre has to count and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 555 W - **Efficiency:** 20.60 % - **Voltage at Pmax (Vmp):** 45.60 V - **Current at Pmax (Imp):** 12.20 A - **Open-circuit voltage (Voc):** 53.50 V - **Short-circuit current (Isc):** 13.00 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.259 %/degC - **Temperature coefficient of Voc:** -0.234 %/degC - **Temperature coefficient of Isc:** 0.033 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2375 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 34.4 kg - **Area:** 2.69 m2 - **Power density:** 206.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 93.2 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.20 % - **Output after 30 years:** 517 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11093 of 14005 | | Power density | 11096 of 14005 | | Temperature coefficient | 480 of 14005 | | Weight | 12725 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type HJT cells + SmartWire (SWCT)** - Combining n-type heterojunction (HJT) cells with the proprietary SmartWire (SWCT) interconnection technology instead of conventional busbars reduces microcracks and resistive losses, resulting in lower LID/LeTID degradation and more stable output at high temperatures compared to PERC panels. - **30-year product and power warranty** - The manufacturer specifies 30 years of both product and power warranty - well above the segment standard, where typical values are 12-15 years for product warranty and 25-30 years for linear power warranty. - **Bifacial design** - The bifacial construction enables additional energy yield from the rear side of the module, which is particularly beneficial on light-colored/reflective roof surfaces and in ground-mount installations. - **Swiss Tier-1 manufacturer with long history** - Meyer Burger is a Swiss company headquartered in a country with strong quality standards, founded in 1953, and for years operated as a recognized Tier-1 supplier in the European market, which historically built investor confidence in its HJT technology. - **Light aesthetic for premium roofs** - The white frame and backsheet (White), combined with microcrack resistance, deliver a clean, understated installation appearance - an advantage for premium projects where roof aesthetics matter alongside electrical parameters. ## Cons - **Production discontinued, service risk** - The series was discontinued (2024-2025), and Meyer Burger Technology AG itself filed for insolvency in Germany and Chapter 11 bankruptcy in the US in 2025, halting module production in Arizona and selling its manufacturing equipment to Waaree. This means genuinely limited availability of service, spare parts, and warranty support for end customers. - **Stated 30-year warranty carries risk** - Despite the formally stated 30-year product and power warranty, the manufacturer's 2025 bankruptcy calls into question the actual enforceability of these obligations over coming decades - a typical risk after a renewable energy manufacturer's insolvency, when warranty claims fall into bankruptcy proceedings or get assumed by another entity under different terms. - **Lower efficiency than competitors** - Efficiency of 20.1-20.8% is noticeably lower than comparable 540-560 Wp modules from other manufacturers, e.g. Exiom EX540-560M(B) (21.7%), Fellow Energy FE72-18X (21.7%), or Premier Energies 144 HC PERC Bifacial (21.67%) - a gap of roughly 0.9-1.6 percentage points means less power from the same roof area. ## About this series The Meyer Burger Panel+ White XL series consists of modules designed for maximum energy yield in real roof conditions - even under poor sunlight, higher temperatures, and partial soiling. A key advantage is the combination of n-type HJT cells with the company's proprietary SmartWire connection technology, which ensures high operational stability and reduces the risk of power drops over time. In practice, you get **more energy production from the same area** without having to use oversized modules that make logistics and installation more difficult. The Panel+ White XL also stands out for its **resistance to micro-cracks** and attention to the durability of the layers, which will be appreciated by investors focused on long-term operation. Its clean aesthetics and refined finish make it a good choice for modern roofs - where **the appearance of the installation** is as important as its parameters. The series is particularly suitable for homes, small businesses, and premium projects where **reliability** and predictable performance are a priority, rather than just the initial price. ## Notable figures - At 20.6% efficiency, this panel is 1.9pp below the \*\*HJT 550-600W\*\* median of 22.5% - 206.1 W/m² power density is 18.7 W/m² below \*\*HJT 550-600W\*\* median (224.8 W/m²) - requires larger installation area - At -0.26%/°C, hot weather performance is typical for \*\*HJT 550-600W\*\* panels - At 34.4 kg (1.8 kg above \*\*HJT 550-600W\*\* median of 32.6 kg), requires checking roof load capacity - 90% bifaciality enables rear-side power generation, boosting yield by 4-14% on reflective surfaces ## Questions ### Is the Meyer Burger Panel+ White XL series still available for purchase? The Panel+ White XL series has been discontinued and is no longer available as a new product. Meyer Burger filed for bankruptcy in 2025 following the loss of its key customer, and the Goodyear, Arizona manufacturing facility ceased operations. Units may still appear on the secondary market or through distributor clearance sales, but buyers should verify warranty support availability before purchasing, as the manufacturer's ability to honor claims is uncertain. ### What is HJT and SmartWire technology in the Meyer Burger Panel+ White XL, and is it worth it? HJT (Heterojunction) combines n-type crystalline silicon with thin amorphous silicon layers, reducing recombination losses and improving efficiency under real-world temperatures. SmartWire Connection Technology (SWCT) replaces conventional busbars with a mesh of fine wires, cutting cell shading by roughly 30% and dramatically improving resistance to micro-cracks. The practical result is higher annual energy yield and lower long-term power degradation compared to standard PERC modules. ### How does the Meyer Burger Panel+ White XL 560W perform when the roof gets hot in summer? Very well compared to most alternatives. HJT cells carry a Pmax temperature coefficient of approximately -0.26%/°C, noticeably lower than typical PERC cells at -0.35%/°C. On a hot summer day, a 560 Wp module loses proportionally less power than competing technologies, which translates to a measurably better LCOE over the system lifetime, especially in climates with hot, sun-rich summers. ### Is the Meyer Burger Panel+ White XL a bifacial panel, and what does that mean in practice? Yes, the Panel+ White XL is a bifacial module, meaning the rear side also generates power from reflected irradiance. On a pitched residential roof without a bright surface underneath, the rear-side gain is typically modest, around 5-10%. Bifacial gains are more significant in ground-mount or flat-roof installations with light-colored membranes. For pitched roofs, the panel's front-side efficiency exceeding 20% remains the primary performance driver. ### What warranty does the Meyer Burger Panel+ White XL series carry? Meyer Burger originally offered a 30-year product warranty covering manufacturing defects and a 30-year power output warranty, among the longest terms available in the residential PV market. However, given Meyer Burger's 2025 bankruptcy filing, the enforceability of these warranties is uncertain. Buyers acquiring panels from secondary sources should confirm whether a distributor or installer provides independent warranty insurance before committing to a purchase. ### What type of installation is the Meyer Burger Panel+ White XL best suited for? The series was designed for premium residential and small-commercial installations where both performance and aesthetics matter. Its white finish and refined look made it a strong choice for modern rooftops. With up to 560 Wp per module, it allowed a high-output system to be built on a limited roof area. Strong resistance to micro-cracks and solid low-irradiance performance made it particularly well-suited for Central European climates with frequent overcast conditions. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Meyer-Burger-Panel-White-XL-540-560-Datasheet-MB-WG144Cyz-XX-62e5d8074417.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | -45 W, lighter, +4.4 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Lighter, +4.2 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | -50 W, lighter, +4.1 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Lighter, +4.0 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | 18 kg lighter, +3.8 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | -15 W, lighter, +3.8 pp | | [Meyer Burger MB\_WG144Cyz\_540](https://comparepv.com/panel/meyer-burger-mb-wg144cyz-540) | 540 W | -15 W, -0.5 pp | | [Meyer Burger MB\_WG144Cyz\_545](https://comparepv.com/panel/meyer-burger-mb-wg144cyz-545) | 545 W | -10 W, -0.4 pp | | [Meyer Burger MB\_WG144Cyz\_550](https://comparepv.com/panel/meyer-burger-mb-wg144cyz-550) | 550 W | -0.2 pp | | [Meyer Burger MB\_WG144Cyz\_560](https://comparepv.com/panel/meyer-burger-mb-wg144cyz-560) | 560 W | Very close match | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +95 W, lighter, +4.6 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +125 W, lighter, +4.6 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +120 W, lighter, +4.4 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +90 W, lighter, +4.4 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +145 W, +4.4 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +140 W, +4.3 pp | --- Source: https://comparepv.com/panel/meyer-burger-mb-wg144cyz-555 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.