sir glennjv... tanong ko lang kung bakit hindi ninyo consider ang orientation na facing south? and the proper angle from horizontal?... yung sm north edsa ba ay facing south? nakita ko kasi sa picture, mukhang consider nila ang angle of inclination (11-12 degree for metro manila location... "If your latitude is below 25°, use the latitude times 0.87".)... hehe... solar cowboy.. ikaw ba 'yan, sir glennjv?