I would need 200 watts x 2 single solar panel to run my 1HP aircon, 1x 7cubic ft refrigerator, LED tv, laptop/computer.

I am saving up to be able to do this as this would save me a tremendous amount of money! Without solar panel, I am paying on my monthly electric bill Php6,500!!!

Lelang, sorry, but 400 watts of solar panels will only output 400 watts of power under ideal conditions.

In the Philippines, 400 watts of panels can be expected, on average, to produce 2000 watts per day.

( average of 5 hours of usable solar insolation per day )

The appliances that you mentioned, would use about....

1Hp A/C = 0.78 kW = 18.72 kWh/day. Assume it cycles on thermostat at 50/50 = 9.36 kWh/day

Fridge = 0.2 kW = 4.8 kWh/day. Assume it cycles on thermostat at 50/50 = 2.4kWh/day

LED TV = 0.1 kW = 2.4kWh/day. Assume it is on for 4 hrs per day = 0.4 kWh/day

Laptop = 0.09kW = 2.16kWh/day. Assume it is on for 6 hrs per day = 0.54 kWh/day

Just these appliances alone would require 12.7 kWh of power per day.

Your 400 watts of panels will give you about 2 kWh per day on average ( some days more, some less )

Sorry, but by my calculations, 400 watts of panels is very well short of what is required.

Plus, the panels will only produce meaningful power for about 5 hours per day, you will need to store the rest in batteries,

with some allowance for rainy days, cloudy days, etc.

Just to break even would require 10 kW of battery storage. ( plus chargers and inverters )

This is roughly equivelant to 10 "normal" car batteries. ( reality would triple this number )

You will need to go back to the drawing board.....

Have a look at your power bill. You will be able to see how many kWh of power you have used over the billing period.

Do the math and figure out your actual DAILY consumption.

Only then can you start to design a system