Graphical display is also one of my requirements alongwith data. What level of data security exists in running dashboard data ? Can i keep privacy with the fetched data?

@tailchopper I wonder if you wouldn't be better of on another forum. MySensors provides an infrastructure for home-automation and IoT. If you are not into connecting it to a MySensors ecosystem there are some dedicated PV (power monitoring) forums which probably give you more focussed / better answers. Like Openenergymonitor