LONGi Solar Panels

LONGi Hi-MO Solar Panels — N-Type TOPCon Technology

About LONGi Solar

Founded in 2000 and headquartered in Xi'an, China, LONGi has grown from a small silicon materials company to the world's largest mono-crystalline silicon product manufacturer. The company holds numerous world records for solar cell efficiency and has invested billions in R&D to push photovoltaic technology forward. LONGi's commitment to monocrystalline technology has driven the industry-wide shift from polycrystalline to mono, establishing the standards that modern solar panels are measured against.

LONGi operates manufacturing facilities across China, Malaysia, and Vietnam, with a combined annual production capacity exceeding 150 GW. The company's financial strength and consistent growth have earned it a Tier 1 ranking from BloombergNEF for over a decade, making LONGi panels a bankable choice for utility-scale projects, commercial installations, and residential rooftops alike.

Hi-MO Series: N-Type TOPCon Technology

The LONGi Hi-MO series represents the company's premium product line, featuring N-Type TOPCon (Tunnel Oxide Passivated Contact) cell technology. N-Type silicon is inherently more efficient and less prone to light-induced degradation than traditional P-Type silicon, resulting in panels that maintain higher output over their lifetime.

LONGi's Hi-MO 6 and Hi-MO X6 series panels achieve efficiency ratings up to 22.5%, placing them among the most efficient commercially available panels. The Hi-MO 6 Explorer features a sleek all-black design with no visible grid lines, making it ideal for residential installations where aesthetics matter. The Hi-MO X6 Scientist offers slightly higher efficiency with a standard silver frame design, optimized for commercial and utility-scale projects where maximum output per square foot is the priority.

Industry-Leading Technology & Reliability

LONGi panels undergo rigorous testing and certification, including:

• IEC 61215 and IEC 61730 certification for safety and performance
• PID (Potential Induced Degradation) resistance testing
• Salt mist and ammonia corrosion testing for coastal and agricultural environments
• Snow load testing up to 5,400 Pa and wind load testing to 2,400 Pa
• Temperature coefficient optimization for hot climate performance

LONGi's N-Type TOPCon cells demonstrate lower temperature coefficients than conventional P-Type cells, meaning they lose less power as cell temperature rises. In hot climates, this can translate to 2-5% more annual energy production compared to panels with higher temperature coefficients — a significant advantage over a 25-year system lifetime.

25-Year Warranty & Performance Guarantee

LONGi backs their Hi-MO series with a comprehensive 25-year performance warranty guaranteeing at least 84.8% of original rated power output after 25 years. The product warranty covers 15 years for material and workmanship defects, with optional extended warranty programs available. As an authorized LONGi dealer, Portlandia Electric Supply handles warranty registration and claims directly, ensuring seamless support for our customers.

Why Buy LONGi Panels from Portlandia Electric Supply?

As an authorized LONGi dealer, we receive direct factory support, training, and technical resources that unauthorized resellers cannot access. We maintain LONGi inventory in our Portland warehouse for fast shipping, and our technical team has completed LONGi's product certification training. When you buy LONGi panels from PES, you get genuine products with valid warranties, competitive pricing, and expert support.

Starting at $0.28/watt for select Hi-MO models, our LONGi pricing is among the most competitive in the industry. Browse our LONGi inventory or contact our sales team for volume pricing and project quotes.