Hi; Normally, the solar panel charges a 12V battery and battery provides backup to load via an inverter. The solar panel produces voltage which is directly proportional to sun light. So early in the morning and in evening, solar panel produces less voltage which is insufficient to charge the battery but with more bright of sunlight, solar panel produces more voltage which then start recharge of battery. So what is produced voltage range of solar panel for low wattage applications? Any link/e-paper on it? I want to know the detail/working principle of SP.