LONGi Solar Panels
LONGi Hi-MO Solar Panels — N-Type TOPCon Technology LONGi Green Energy Technology is the world's largest solar panel manufacturer by shipment volume and one of the most respected names in photovoltaic technology. At Portlandia Electric Supply, we're proud to be an authorized dealer for LONGi's complete Hi-MO solar panel lineup, including their latest N-Type TOPCon…
197 products
LONGi
LONGi 375W 72-Cell PERC Solar Panel
$109.13
$0.29/W · 375WOnly 3 leftShips in 1–2 business daysTop Seller
LONGi
LONGi Solar Panels - Longi 355W Solar Panel - LR4-60HPB...
$299.35
$0.84/W · 355WAvailable to orderLead time confirmed at checkoutTop Seller
LONGi
LONGi Solar LGi7-72HTD 610M
$173.33
Available to orderLead time confirmed at checkout
LONGi
LONGi 400W Hi-MO5 LNG-400-LR5-54HABB 108 Half-Cut M10 C...
$175.20
$0.44/W · 400WIn stockShips in 1–2 business days
LONGi
LONGi 355W LNG-355-LR4-HPB 120 Cell Mono Black on Black...
$266.31
$0.75/W · 355WIn stockShips in 1–2 business days
LONGi
Longi HiMO 360W LR4-60HPB-360M BoB Solar Module
$108.89
$0.30/W · 360WIn stockShips in 1–2 business days
LONGi
Longi 370W Bifacial Mono PERC Solar Panel – LR6-72HBD-370M
$123.74
$0.33/W · 370WIn stockShips in 1–2 business days
LONGi
LONGi 435W (Pallet of 30) Bifacial Dual‑Glass Half‑Cut ...
$2,996.99
In stockShips in 1–2 business days
LONGi
LONGi Solar LR8-66HVD-665M
$173.33
Available to orderLead time confirmed at checkout
LONGi
LONGi Solar LR8-66HVD-660M
$173.33
Available to orderLead time confirmed at checkout-
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About LONGi Solar Panels
LONGi Hi-MO Solar Panels — N-Type TOPCon Technology
LONGi Green Energy Technology is the world's largest solar panel manufacturer by shipment volume and one of the most respected names in photovoltaic technology. At Portlandia Electric Supply, we're proud to be an authorized dealer for LONGi's complete Hi-MO solar panel lineup, including their latest N-Type TOPCon series that delivers industry-leading efficiency and performance.
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.
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Shop Solar Panels Apply for Pro AccountPopular LONGi Solar Panels models & specs
- LONGi Solar LR8-66HVD-665M
- LONGi Solar LR8-66HVD-660M
- LONGi Solar LR8-66HVD-655M
- LONGi Solar LR8-66HVD-650M
- LONGi Solar LR8-66HVD-645M
- LONGi Solar LR8-66HVD-640M
- LONGi Solar LR7-60HVH-560M
- LONGi Solar LR7-60HVH-555M
- LONGi Solar LR7-60HVH-550M
- LONGi Solar LR7-60HVH-545M
- LONGi Solar LR7-60HVH-540M
- LONGi Solar LR7-60HVH-535M
- LONGi Solar LR7-54HVB-495M
- LONGi Solar LR7-54HVB-490M
- LONGi Solar LR7-54HVB-485M
- LONGi Solar LR7-54HVB-480M
- LONGi Solar LR7-54HVB-475M
- LONGi Solar LR7-54HJBB-505M
- LONGi Solar LR7-54HJBB-500M
- LONGi Solar LR7-54HJBB-495M
- LONGi Solar LR7-54HJBB-490M
- LONGi Solar LR7-54HJD-510M
- LONGi Solar LR7-54HJD-505M
- LONGi Solar LR7-54HJD-500M
- LONGi Solar LR7-54HJD-495M
- LONGi Solar LR8-66HYD-630M
- LONGi Solar LR7-60HVHL-560M
- LONGi Solar LR7-60HVHL-555M
- LONGi Solar LR7-60HVHL-550M
- LONGi Solar LR7-60HVHL-545M
- LONGi Solar LR7-60HVHL-540M
- LONGi Solar LR7-60HVHL-535M
- LONGi Solar LR7-54HVH-500M
- LONGi Solar LR7-54HVH-495M
- LONGi Solar LR7-54HVH-490M
- LONGi Solar LR7-54HVH-485M
- LONGi Solar LR7-54HVH-480M
- LONGi Solar LR7-72HVDF-665M
- LONGi Solar LR7-72HVDF-660M
- LONGi Solar LR7-72HVDF-655M
- LONGi Solar LR7-72HVDF-650M
- LONGi Solar LR7-72HVDF-645M
- LONGi Solar LR7-72HVDF-640M
- LONGi Solar LR8-66HYD-670M
- LONGi Solar LR8-66HYD-665M
- LONGi Solar LR8-66HYD-660M
- LONGi Solar LR8-66HYD-655M
- LONGi Solar LR8-66HYD-650M
- LONGi Solar LR8-66HYD-645M
- LONGi Solar LR8-66HYD-640M
- LONGi Solar LR8-66HYD-635M
- LONGi Solar LR7-54HGBB-460M
- LONGi Solar LR7-54HGBB-455M
- LONGi Solar LR7-54HGBB-450M
- LONGi Solar LR7-54HGBB-445M
- LONGi Solar LR7-54HGBB-440M
- LONGi Solar LR7-72HVH-670M
- LONGi Solar LR7-72HVH-665M
- LONGi Solar LR7-72HVH-660M
- LONGi Solar LR7-72HVH-655M
- LONGi Solar LR7-72HVH-650M
- LONGi Solar LR7-72HVH-645M
- LONGi Solar LR7-72HVH-640M
- LONGi Solar LR7-72HVHF-670M
- LONGi Solar LR7-72HVHF-665M
- LONGi Solar LR7-72HVHF-660M
- LONGi Solar LR7-72HVHF-655M
- LONGi Solar LR7-72HVHF-650M
- LONGi Solar LR7-72HVHF-645M
- LONGi Solar LR7-72HVHF-640M
- LONGi Solar LR7-72HVD-665M
- LONGi Solar LR7-72HVD-660M
- LONGi Solar LR7-72HVD-655M
- LONGi Solar LR7-72HVD-650M
- LONGi Solar LR7-72HVD-645M
- LONGi Solar LR7-72HVD-640M
- LONGi Solar LGi7-72HTD 620M
- LONGi Solar LGi7-72HTD 615M
- LONGi Solar LGi7-72HTD 610M
- LONGi Solar LGi7-72HTD 605M
- LONGi Solar LGi7-72HTD 600M
- LONGi Solar LR7-72HYD-660M
- LONGi Solar LR7-72HYD-655M
- LONGi Solar LR7-72HYD-650M
- LONGi Solar LR7-72HYD-645M
- LONGi Solar LR7-72HYD-640M
- LONGi Solar LR7-72HYD-635M
- LONGi Solar LR7-72HYD-630M
- LONGi Solar LR7-72HYD-625M
- LONGi Solar LR7-72HTH-615M
- LONGi Solar LR7-72HTH-610M
- LONGi Solar LR7-72HTH-605M
- LONGi Solar LR7-54HTH-475M
- LONGi Solar LR7-54HTH-470M
- LONGi Solar LR7-72HTH-630M
- LONGi Solar LR7-72HTH-625M
- LONGi Solar LR7-72HTH-620M
- LONGi Solar LR7-54HTHF-475M
- LONGi Solar LR7-54HTHF-470M
- LONGi Solar LR7-54HTHF-465M