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2KW is a big solar system. You will need multiple charge contrllers. How much is your load? How did you calculated this 2KW figure? Have you made any allowance for cloudy days or winter?
In day time, power from charge controller will goto batteries and the to inverter. You will need deep cycle batteries and MPPT type charge controllers for better performance.
I am planning to divide the 2KW in 10 panels each of 200 watts.
How many charge controllers will that need?
Daily requirement is
daytime= 1000 watts
night= 1500 watts , these are rough estimates with a ± of 200 watts
I am keeping the extra watts for the resistance that would develop due to temperature rise in the panels(ideal lab conditions = 25 C. after that with every degree rise there is 0.5 % reduction in efficiency due to internal resistance) so a jump from 25 to 75 degree c will mean 25 % less efficiency.
May be latter add more panels to compersate for the 1 % efficiency degradation that occurs in solar cells/year.
So in nutshell will be dealing with 2300-2500 watts.
Will be using the solar system in a grid-tie manner. Means will use wapda for heavy duty stuff like AC etc and for rainy days and stuff and solar for the rest. Will add more batteries with time(currently budget of 200000 Rs), for now i only need 6-7 hours backup…
How much batteries will that require?
Also what is MPPT type charge Controller?
And which type of inverter and of what specs do i need?