Middle of its segment, short guarantee
Longi Solar Hi-MO X6 Explorer series was designed for maximum energy yield from the same rooftop surface - especially in locations where every square meter counts and high module performance is crucial even under varying weather conditions. The key difference compared to many standard panels lies in the application of HPBC back-contact cells, which improves light utilization and supports stable power generation even under weaker sunlight. In practice, this translates to a real advantage during morning, afternoon, and partially cloudy periods.
The Hi-MO X6 Explorer also features enhanced resistance to micro-cracking thanks to full back welding technology, ensuring longer, trouble-free operation - crucial for installations exposed to wind, snow, and cyclic temperature changes. The series also stands out with its elegance and clean appearance, making it a perfect fit for modern residential buildings and premium designs.
This is an excellent choice for both residential and commercial installations where high efficiency, reliability, and predictable energy output over time are key priorities.
Ranking
Signals from the data
Residential, commercial, utility-scale, shaded-installations and hot-climate.
Owners who want a long output guarantee.
Bottom 12% of the 420-620 W band, against a median of 30 yrs.
The use of back contact HPBC cells eliminates the front-side busbar grid, improving light absorption and delivering higher efficiency (up to 22.7%) plus more stable output during morning, afternoon, and diffuse-light conditions compared to conventional PERC/TOPCon cells.
Peak efficiency of 22.7% matches or slightly exceeds comparable N-type 585 W modules (Hanersun Hitouch 5N and Q-SUN Qrystal N8 at 22.65%, Risen RSM144-9 at 22.6%), confirming a top-tier position in the market segment.
Full back welding technology reinforces cell interconnections across the entire rear surface, reducing microcrack risk under wind, snow, and thermal cycling loads - important for long-term reliability on sloped roof installations.
A power warranty of up to 30 years (with a 15-year product warranty) exceeds the industry-standard 25/12-year package, giving investors a longer horizon of predictable energy yield and stronger investment protection.
Longi Solar has operated since 2000 and holds Tier-1 bankable status, meaning financial credibility recognized by banks and insurers financing commercial installations, and lower investor risk compared to less-established peer brands (Hanersun, Q-SUN).
The Hi-MO X6 Explorer series, launched in 2022, was discontinued in 2025. This means limited availability of replacement parts and constrained warranty servicing over the long term compared to models still in active production.
The back contact HPBC design, with metallization on the rear cell surface, precludes bifacial operation - unlike many N-type TOPCon panels that offer an additional 3-8% yield from bifaciality, e.g., on light-colored ground or elevated racking.
- At 21.9% efficiency, this panel is on par with typical database modules
- At 219.0 W/m² power density, roof space requirements are typical for database panels
- At -0.29%/°C, hot weather performance is typical for database panels
- Ranked #6783 out of 14005 panels for efficiency in the database
Specifications
Datasheet charts
Measured curves published by Longi Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 520 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
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