The number of solar panels depends upon the peak hours of sunlight in your region and the type of panel you use. For a 2000kWh monthly load at a region where sunlight peak hours per day are 7 hours, you will have to install 31 panels of 360 watts. As it would require at average 66.667kWh per day and converting that into watts it becomes 66,667 watts, then we will have to divide that from sunlight peak hours, which we assumed 6 hours. So we get that 11,111 watts and then divide that with the wattage of your solar panel, which we assumed at 360 watts. That requires 31 solar panels of 360 watts.