Longi Hi-MO 7 610W Solar Panel 66-cell TOPCon (LR8-66HGD-610M)

The LONGi LR8-66HGD-610M is a 610W Hi-MO 7 bifacial dual-glass module with 22.6% module efficiency, built on LONGi's HPDC cell technology and n-type wafers.

HPDC cells give a -0.28%/°C power temperature coefficient for better output in hot weather. Power degradation is under 1% in year one and 0.4% a year from years 2 to 30, with a guaranteed 87.4% of nameplate at year 30, backed by a 30-year linear power warranty and a 12-year materials and processing warranty.

The 2.0 mm + 2.0 mm heat-strengthened dual-glass build in an anodised aluminium frame is rated to 5400 Pa front and 2400 Pa rear static load and hail-tested with 25 mm hailstones at 23 m/s. With 80% (±5%) bifaciality, the rear face adds yield on ground-mount and carport structures.

Why installers choose it

• 610W at 22.6% efficiency in the 2382 x 1134 mm 132-half-cell format
• HPDC cells: -0.28%/°C Pmax temperature coefficient for hot-climate yield
• Bifacial dual-glass: 80% (±5%) bifaciality
• 30-year power warranty: under 1% loss in year 1, 0.4% a year to year 30 (87.4% at year 30)
• 1500 V DC system voltage (IEC/UL), 35 A maximum series fuse
• IEC 61215, IEC 61730 and UL 61730 certified

Good to know before you quote it

• Large format: 2382 x 1134 x 30 mm, 32.5 kg. Check rail spans and clamp zones for 2.4 m modules.
• Voc 48.38 V and Isc 15.95 A at STC. Maximum series fuse rating is 35 A. Size strings for the coldest site temperature (Voc coefficient -0.230%/°C).
• The connector type is not specified on LONGi's datasheet. Confirm it on delivered stock before mixing with other brands.
• Silver anodised aluminium frame with clear dual glass. Cables are +400/-200 mm for portrait or ±1400 mm for landscape mounting (customisable).