Required Solar Panel For 24 watts BLDC Fan First of all question arise about the capcity of required solar panel for "ALTEK"24 watt BLDC fan manufactured by "s.r.electronics .So the answer depends upon our uses hours for bldc ceiling fan.If we are using it in day time only then required solar panel of 40 watt is sufficient.But If we require it run during night then we have to install battery with it .For back up of appx 14 hrs , 40 ah battery is sufficient and now 100 watt solar panel is to be installed so that solar panel may run the fan in day time with charging of battery also.