as of December 31, 2009, compared with $420.4 million as of September 30, 2009. Days sales outstanding were 60 days in the fourth quarter of 2009, compared to 81 days in the third quarter of 2009.
as of December 31, 2009, compared with $420.4 million as of September 30, 2009. Days sales outstanding were 60 days in the fourth quarter of 2009, compared to 81 days in the third quarter of 2009.
solarradiation on tilted sur-face.According to the days ofautonomy and the principle ofenergy equilibrium a calculated example presented. Key words:optimumsizing;photovoltaic array;batteries;days of autonomy