1 Borosilicate glass according to ISO3585:1991; transmittance of borosilicate glass:0.92.Absorbance of solar selective absorptive coating:0.94; Hemispherical emittance:0.08; Getter according to GB/T9505-1998.

Start-up temperature: no more than 25℃.

Start-up time: no longer than 2 minutes under normal sunshine.

Low temperature resistance: no breaks at -30℃.

Heat impact resistance: no damage after over 3 time’s alternative impact of cold water below 25℃ and hot water over 90℃.

Pressure resistance: can withstand 0.6Mpa.

Hail resistance: no damage by the impact of 25mm diameter hail.