Longi LR8-66HGD615M silver frame Bifacial Hi-MO7 solar panel with HPDC technology

Longi LR8-66HGD615M Silver Frame Bifacial Hi-MO7 Solar Panel with HPDC Technology

The Longi LR8-66HGD-615M is a high-performance, bifacial solar module from the Hi-MO 7 series, designed specifically for industrial and utility-scale projects. Advanced HPDC cell technology, high bifaciality, and an efficiency of up to 23% ensure outstanding energy production in large-scale systems.

615 W power output – optimized for utility-scale applications

The 615 W nominal power output makes the module ideal for 1500 V systems with long string lengths and modern inverters . Higher power per module reduces the number of modules required, lowers mounting and cabling costs, and improves the overall cost-effectiveness of the system.

Module efficiency of up to 23.1% ensures that maximum installed power is achieved from the available area. A power tolerance of 0–3% further increases the security of the investment, as the module operates at least at its rated value.

HPDC cell technology – higher yield and stable operation

The Hi-MO 7 series’ advanced HPDC (High Performance Dual Cell) technology increases module efficiency and reduces internal losses. The half-cell design results in lower operating temperatures and more stable performance even under high irradiance.

Favorable temperature coefficients help minimize performance losses caused by summer heat stress, which is particularly important for large, ground-mounted power plant systems. The first-year power degradation is less than 1%, followed by a low annual degradation rate of approximately 0.4%, ensuring higher cumulative energy production in the long term.

Bifacial design – bifaciality of up to 80%

The module features a bifacial design with a bifaciality factor of up to 80±5%. This allows it to utilize light reflected from the rear side, enabling significant additional yield when combined with proper ground preparation or a high-albedo surface.

The manufacturer provides specific data on the various rear-side power gain levels, which aids in accurate power plant modeling and bank-level yield calculations.

Robust mechanical design for large-scale systems

The dimensions of 2382 × 1134 × 30 mm and a weight of 33.5 kg represent the stable construction typical of the utility category. The double-glazed design and anodized aluminum frame ensure a long service life and enhanced mechanical resistance.

The module is tested for static loads of 5400 Pa on the front and 2400 Pa on the rear, and also passes hail tests. The IP68-rated junction box and a maximum system voltage of 1500 V DC support high-performance power plant applications.

30-year performance warranty – a long-term investment

The Longi LR8-66HGD-615M module comes with a 12-year product warranty and a 30-year linear performance warranty. Based on its favorable degradation curve, the module will still operate at a high performance level by the end of the 30th year, which is crucial for large-scale investments.

The combination of a long warranty period and advanced cell technology enables stable, predictable energy production throughout the entire lifespan.

SOLARKIT Reviews

The Longi LR8-66HGD-615M Hi-MO 7 is a module specifically recommended for utility-scale and large commercial projects where high power density and bifacial yield are primary considerations. The combination of 615 W power output and HPDC technology optimizes system costs and increases long-term energy production.

It is a highly recommended choice for large-scale 1500 V systems and long-term investments.