Middle of its segment, heavy for its output
Longi Solar Hi-MO 5 series panels are a breakthrough solution based on M10 standard silicon wafers, which set new efficiency limits in utility-scale installations and modern commercial systems. Thanks to the use of gallium-doped technology, these modules effectively eliminate the problem of light-induced degradation (LID), which directly translates into stable energy production and a longer lifespan for the entire power plant. Innovative smart segmented soldering allows for the minimization of internal stresses, which drastically reduces the risk of micro-cracks in the cell structure. This series solves the key problem of high Balance of System (BOS) costs - the optimal module size allows for maximum use of the mounting surface while reducing expenditures on cabling and support structures. The use of PERC cells in a Half-Cut architecture ensures that the panels exhibit excellent resistance to high temperatures and work more efficiently in diffused light conditions. Compared to the competition, Hi-MO 5 stands out with the precise matching of electrical parameters to the latest inverters, making them the most cost-effective choice in terms of LCOE for demanding investors. It is a solid foundation for projects where the priority is reliability and maximizing yields from every installed kilowatt of power in Polish solar conditions.
Ranking
Signals from the data
Commercial, utility-scale and shaded-installations.
Weight-limited structures, tight roof space and roofs where every square metre has to count.
Bottom 10% of the 445-645 W band, against a median of 52.7. Ranked 11,795th in the whole database.
Bottom 20% of the 445-645 W band, against a median of 22.30%.
Bottom 20% of the 445-645 W band, against a median of 222.7.
P-type gallium-doped wafers effectively eliminate light-induced degradation (LID), confirmed by the manufacturer's 98% first-year power warranty and a linear annual degradation of only 0.45% - translating to roughly 85% guaranteed power after 30 years.
Dual-glass bifacial construction delivers additional rear-side energy yield and withstands up to 5400 Pa frontside static load without a rear crossbeam, eliminating shading losses from mounting hardware.
The half-cut cell architecture combined with 9-busbar smart soldering interconnect technology minimizes internal cell stress, reducing microcrack risk and improving performance under diffuse light and high-temperature conditions.
Longi Solar has operated since 2000 and is classified as a Tier-1 bankable manufacturer, lowering counterparty risk for large-scale project financing - a meaningful advantage over less established brands in the same power segment, such as Exiom or Fellow Energy.
Hi-MO 5 was manufactured from 2020 to 2023 and has been discontinued in favor of the newer Hi-MO 6, 7, 9 and X10 series. This limits availability of identical replacement modules for existing installations and can extend timelines for warranty or service claims.
Longi's own series comparison states that newer N-type (TOPCon/HPBC) modules in the Hi-MO 6/7/9/X10 lines outperform Hi-MO 5 in efficiency, temperature coefficient, degradation and long-term durability - a real technological limitation for new investments.
The 21.7% maximum efficiency matches Exiom (EX540-560M) and Fellow Energy (FE72-18X) and is close to Premier Energies (21.67%), meaning the series does not stand out electrically against lower-cost competitors in the same 540-560 Wp power class.
- At 21.1% efficiency, this panel is 0.7pp below the database median of 21.8%
- Power density of 211.0 W/m² is 7.1 W/m² below database median (218.1 W/m²) - needs more roof space
- -0.34%/°C temperature coefficient - 0.04pp worse than database median (-0.30%/°C), expect higher hot weather losses
- Weight of 31.8 kg is 5.3 kg above database median (26.5 kg) - verify structural support
- Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof
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 545 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.
Found 2327 panels of the same or similar size to this one, within ±10 mm. See them here Found 2369 panels of the same or similar size to this one, within ±25 mm. See them here Found 2383 panels of the same or similar size to this one, within ±50 mm. See them here Found 2548 panels of the same or similar size to this one, within ±100 mm. See them here
About the Hi-MO 5 series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.