82.6% Collector Efficiency 4mm self-cleaning glass Serpentine pipe configuration ensuring maximum heat transfer Copper absorber with sun-select coating, giving better solar absorption Solar Keymark approved, allowing homeowners to access the Renewable Heat Incentive (RHI) On-roof, in-roof and flat-roof collector mounting systems, both in portrait and landscape 5 year guarantee when installed by a G1 installer. Subject to T&C's Manufacturer Stock Code: GSSKIT1 EAN Code: 5060090372239 Sub-Category: Solar Panel Brand: Grant Category: Solar Type: Portrait