About Paul

Hi my name is Paul ,I am a newby,I joined on 5/6/2016 I am a researcher on alternative energy,My Q, is Ihave a solar hot water system,and have an electrical element installed,I need to know if I can use this system heathing the water during peak hours only,at present I am switching the hot water off and put it on only when I need it,and if I can use it during off peak ,do you know the hours of the off peak please? I thank you for your time Kind Regards Paul