I want to develop a system on solar that the load is 250 watt continous. the battery bank should support it to 2 day. can anyone guide me in it like the solar panel should i have it's ratting and about battery bank.
If I understand correctly you want to supply 250W 24 hours a day.
The correct sized solar array will depend on the location and times of year, but its going to a very large solar system something around 1000w. Only large catamarans have room for this amount of solar.
Is there a way the power consumption can be reduced?
Let us now some more information and we can refine the size of panels needed, and work out a battery bank size.