What input/output voltage do you require?
Don't forget that the lower the input voltage the higher the current.
I recommend you use a higher input voltage as you can, 12V is too low, 48V is a good idea because it's a good compromise between safety and power transmission.
23.5kW sounds a lot for a house and is far too much for a solar powered installation.
Hang on a second, do you mean 23.5kW/h per day?
That's an average of 980W which sounds more reasonable but is still too high for solar power. You need to cut down on your energy usage.
Replace all of your incandescent lamps with compact fluorescents, don't leave devices on standby and consider switching to gas, wood or coal for heating and cooking.