July 19, 2022

Calculate On-Grid Solar System’s size for your home on YOUR OWN!

Everyone who plans for adopting a solar system for his home almost always wonders first about the load the system can handle! If you too are curious about this crucial question, we, at Navitas Solar, are here to help you! It is easy to calculate how much load can be connected to your solar system and accordingly, what should be the size of the system.

The size of on grid solar system required for your home totally depends on your electrical load. There are different queries that we receive from homeowners about installing the solar power plant and the major one is that can AC run on solar power? Can we start two ACs at the same time? In this blog, we will try to answer your questions.

Whenever you buy an electrical appliance for your home, it generally shows wattage (power) that it will require which shows that how much electricity will be required for the appliance to run. Now, let us understand how much power is taken by your home’s major appliances, which will help us to estimate the electricity bill. Now, here is the list of home appliances and their wattages.

Know The On-Grid Solar System’s size for your home

Name of appliance	Wattage
AC	1000 watts
Electric Geyser	2000 watts
Iron Press	1000 watts
Induction cooktop	1000 watts
Water pump	800 watts
Mixer Grinder	500 watts
Washing Machine	300 watts
Refrigerator	250 watts
Laptop	100 watts
TV	150 watts
Ceiling fan	75 watts
Tube light	30 watts

The above list mentions the general wattages of appliances, now it totally depends on the user which kind and size of appliances he/she uses and for how much time he uses. The list is given just to have an idea about the wattages of different appliances.

An average indian house has a connected load of approximately 2000W-3000W. A noteworthy thing is that a homeowner never runs all the loads at the same time, which leads to monthly consumption of electricity of around 150 units to 400 units. Here are some easy steps to calculate the size for on grid solar plant for your home.

1. Average daily consumption in kWh can be calculated from the electricity bill as follows:

Calculate the monthly average energy consumption from last 12 months’ electricity bill.
Let us consider a Monthly average consumption in units for a consumer is 400 units (after averaging for 12 months)
Daily average unit consumption can be calculated by dividing the monthly unit consumption by 30
Average daily consumption is 13.3 kWh /day approximately 14 units
Now 1 KW of Solar System generates 4 units / day (Average generation in India)
So, to generate 14 units per day we will require approx. 3.5 kW of Solar System

In this way , you can calculate the approximate requirement of Solar System at your own.

Here are some ranges of units and the size of the solar power plant that can be installed at your home.

Units	kW
Up to 100 Units	Up to 0.83 kW
100-200 Units	1.6 kW -2.5 kW
300-400 Units	2.5 kW-3.3 kW
400-500 Units	3.3 kW -4.1 kW
500-700 Units	4.1 kW-5.8 kW
700-900 Units	5.8 kW-7.5 kW
900-1100 Units	7.5 kW-9.1 kW
1100-1300 Units	9.1 kW-10.8 kW
1300 Units & above	10.8 kW & above

It depends on the EPC developer to visit you for the exact size of the solar plant but at least you got to know the approximate size of the solar system. Generally, it is assumed that if you have a family of 3-4 persons, then 3 kW solar system is enough for you! Although, it depends on your home and family’s size. When solar system was adapted newly in 2014, then it was considered that 1 kW is enough for the family’s requirements but with the time and advancements in consumption and equipment, nowadays 3 kW is considered as the average solar system for a home. Solar systems above 10 kW are installed in commercial/industrial spaces like hospitals, schools, hotels, industries etc. Now, we think that it is clear to you that your solar system is able to take AC’s load or not, as you know that it totally depends on your electricity bill!

As India’s leading solar module manufacturer, Navitas Solar can make all these calculations and other aspects much easier for you! Navitas Solar’s EPC team can give exact size and quotation for you. We are just a call away!