Every electrical appliance does not consume the same amount of electricity, and you need to utilize a formula in order to calculate the amount of electricity consumed by the appliance. Before calculating the power consumption of an appliance, you need to know two parameters that are key to deriving the power consumption of an appliance, i.e. the power of the appliance and the usage time of the appliance.
The power of an appliance refers to the ability of the appliance to consume electricity per unit of time, 1W means that it can consume 1 joule per second (usually represented by the symbol J) The unit of power is usually used in watts (W) and kilowatts (kW), which have a specific conversion relationship, i.e., 1kW=1000W. Generally speaking, you can learn the power of an appliance from the appliance’s instruction manual or from its nameplate, which is one of the basic parameters of the appliance. This is one of the basic parameters of the appliance.
As the name suggests, the usage time of an appliance means how long the appliance has been running continuously. If you want to know how long your appliance has been running, you can directly record it manually, for example, you can manually record the turning on and turning off time of your washing machine every day, and finally you can get the monthly power consumption of your washing machine.
However, for intermittent appliances such as refrigerators and electric bidet toilet, it is difficult for you to record the running time of the appliances through direct observation. You can install a power monitor in these appliances, which can record the actual running time of the appliances in real time, so that you don’t need to spend a lot of time and energy on observing and recording the data.
Once you know the power and running time of the appliances in your home, you can calculate the power consumption of the appliances by using the formula, which is
Average daily power consumption of an appliance (kWh) = power of the appliance (kW) x average daily running time of the appliance (h)
Monthly power consumption of the appliance = average daily power consumption of the appliance x 30
Annual electricity consumption of an appliance = average daily electricity consumption of an appliance x 365
For example, assuming that the average daily operating hours of your washing machine is 1.5 hours and the power of the washing machine is 0.4kW, substituting the above formula gives you an average daily consumption of 0.6kWh, and the monthly and yearly consumption of your washing machine is 18kWh and 219kWh respectively.
Solar power equipment is undoubtedly the most suitable power generation equipment for home use, this is because solar energy is one of the most widely existed energy sources in nature, and solar energy system can also take up space reasonably, such as the roof, etc., and most of all, solar power system work almost does not have any impact on you, such as noise and air pollution.
To calculate how many watts of solar system you need to build, you can take the help of the following formula, namely
Total wattage of photovoltaic panels = Monthly electricity consumption of your home / Conversion efficiency of the solar system / Average daily peak sunshine hours / 30
Assuming that you are located in an area where the average daily peak sunshine duration is 4 hours, and your home’s monthly power consumption is 600kWh, for the conversion efficiency of solar energy systems, grid-tied solar systems (95%), off-grid and hybrid solar systems (80%), the most commonly used in households is the grid-tied solar system, then substituting into the above formula gives you the total wattage of solar panels of 5.26kW, so you only need to build a 5.5kW solar system to power your home’s equipment.
The electricity consumption of electrical appliances at home is the source of electricity bill, so by knowing how to calculate the electricity consumption of electrical appliances at home, it is beneficial for you to plan the electricity consumption at home reasonably, which can reduce the electricity bill of your home to a certain extent, which is very important for you, of course, if you can’t reduce the electricity consumption of electrical appliances at home, the most sensible choice is to build a suitable solar energy system.
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