Total Load Calculation and Standalone PV System Sizing for Household Appliances

What is the total daily load of a house owner running various appliances?

How can a standalone PV system be properly sized to meet the energy needs of the household?

Total Daily Load Calculation and PV System Sizing

The question combines physics and electrical power measurement to calculate the total power consumption of household appliances and to size a standalone PV system. Let's dive into the details!

Household energy consumption can vary based on the number of appliances and their usage. In this scenario, the house owner is running 10 CFLs, 8 fans, a TV, and a mixie for different durations each day.

The total daily power consumption is calculated by summing the power consumption of each appliance multiplied by its daily usage time. For example, the CFLs consume 20W each and are used for 8 hours, the fans consume 60W each and are used for 8 hours, the TV consumes 80W for 4 hours, and the mixie consumes 60W for 0.5 hours.

Therefore, the total daily power consumption can be calculated as follows: (10 CFLs * 20W * 8h) + (8 fans * 60W * 8h) + (1 TV * 80W * 4h) + (1 mixie * 60W * 0.5h).

Once the total daily energy consumption is determined, a standalone PV system needs to be sized to meet these energy needs. Various assumptions need to be considered such as climate conditions, orientation of the PV panels, battery efficiency, and more.

The minimum capacity of the PV system can be calculated by dividing the total daily consumption by the average sun hours per day at the location, which can be obtained from a solar insolation map. Additionally, battery sizing should take into account autonomy days, depth of discharge, and efficiency.

It is recommended to consult a professional for precise design and sizing of the PV system to ensure it meets the energy requirements of the household effectively and efficiently.