building an emergency lighting system

hi electromaster,
i want to build a solar power emergency lighting system
using an inverter of output 240V/1500W
which can be used when there is a fire emergency
and can come on automatically when there is power failure.
and the system must be powered by two input
1, from the solar panel
2, electricity supply.
i will need an explanatory circuit diagram

Hi electromaster,
please iam trying to build a stabilizer which can control a 240volts. Can you give me the circuit diagram and the direction on how to go about doing it? :?: