1,TUV,UL,CE,ISO CERTIFICATE 2,OVER 30 YEARS ... grid remote areas or public gird is inefficient place, solar system no just bright a illumination cost less effective. ... to Philippine Remote school 2005.10 Offer the complete solar home system more than 1000 sets to papua new guinea ... 8hrs with solar panelUse timeThis system can meet the location people use 10 hrs/days ,2-3 rainy days 30 watt solar system