Easiest Way of Solar System Calculation for Home

Solar panel cost calculator for home

A Solar Panel Cost Calculator is an electronic device. Solar panel cost calculator helps to calculate the cost of installing solar panels. In this case, different factors take into account such as the size of the property, the amount of sunlight the area receives, and the energy consumption. The solar cost calculator requires the user to input some basic information about their property and energy consumption. And then uses that data to generate a quote for the cost of solar panels and installation. However, we will talk about the easiest way of solar system calculation for home and this process can apply to offices and industries also.

Why need solar panel cost calculator?

To estimate how much it will cost to install solar panels on your roof. Before calculating cost, you must know a few things, such as how much energy you use each month, and how much sunlight your area gets. But where will you get this information? You can find this information on your electric bill and by checking online resources (NREL) like the National Renewable Energy Laboratory’s solar calculator.


If you have this information, simply enter it into the solar panel cost calculator. You will get an estimate of how much it will cost to install solar panels on your home or some other else. Keep in mind that the cost can vary depending on factors like the size of your home and the type of solar panels you choose. But don’t let the cost scare you away. Investing in solar power can actually save you money in the long run by reducing your electricity bill.  

Easiest way of solar system calculation for home

If you wish to buy solar panels to meet our domestic load then we face some problems. The major problem is selection. Most of them don’t know how many solar panels I require for my home. In this case, we have brought the easiest way of solar system calculation for home. To determine the solar system calculation for the home we have to consider three main things:

  • Home electrical load calculation
  • Inverter selection
  • Battery selection
  • Solar panel selection

Home electrical load calculation

Suppose you have 30 watts 5 LED lights, 70 watts 5 ceiling fans, 50 watts 2 LED TVs, 300 watts 2 refrigerators, and 700 watts 1 washing machine.

  • 5 LED light = 5 * 30 watt = 150 watt
  • 5 ceiling fan = 5 * 70 watt = 350 watt
  • 2 LED TV = 2 * 50 watt = 100 watt
  • 2 refrigerator = 2 * 300 watt = 600 watt
  • 1 washing machine = 1 * 700 = 700 watt

Total electrical load = 150 + 350 + 100 + 600 + 700 = 1900 watt

Total home electrical load = 1900 watt

Inverter selection

Inverter selection is an essential thing. In this case, you have to know your home’s electrical load. It is good to say that the inverter is rated in VA or KVA. In this case, you have to know your residential power factor. However, inverter capacity (VA) = total electrical load/power factor

Inverter capacity (VA) = 1900/0.8 = 2375 VA

If you use a 2375 or 2400 VA capacity inverter for 1900 watt electrical load then it will be inappropriate. It is because sometimes surge power can exceed this limit easily and your small devices may burn out. The best practice to choose your inverter is 3000 VA or 3 KVA for 1900 watt load.

But how much DC current you required?

Very simple, your electrical load is 1900 watt

  • If the battery DC volt is 24 V
  • Now, DC current is P = VI
  • DC current I = P/V = 1900/24
  • DC current I = 79A

Battery selection

In this section, we will talk about the battery selection process. In this case, we will follow a common formula that is applicable to all types of batteries.

  • = W * H/V
  • = 1900 watt * 8h/24volts
  • = 633 AH
  • So, you should choose a 650 AH battery


W = total load (1900 watts)

H = Backup time in hours (if consider 8 hours)

V = battery voltage (if voltage me 24 volts)

Now we have to find a battery charging current. How to find the battery charging current? Let’s see that

Our selected battery capacity is 650 AH and we will calculate charging for it. We know well that charging current should be 10%

Therefore charging current for 650 AH battery = 650 * 10% = 65 A

So, we got our charging current 65 A for a 650 AH battery.

Solar panel selection

First of all, let’s find solar panel current to determine solar system size.

Battery charging current + home load current = 65 + 79 = 144 A

Let’s find solar panel power (P) = V * I = 24 V * 144 A = 3456 Watt

So, a 3456-watt solar panel is required for 1900 watt home load (AC load).

How many solar panels require? Basically, there are some capacities of solar panels is available in the market, such as 125 watts, 180 watts, 375 watts, 440 watts, and 700 watts.

So, if you use a 700-watt solar panel then you will need 5 solar panels 700 * 5 = 3500 watts

On the other hand, if you use a 440-watt solar panel then you will need 8 solar panels = 440 * 8 = 3520 watts.  

So, finally, if you have 1900 watt home electrical load then you will require:

  • 3 KVA inverter
  • 633 AH battery
  • 440-watt 8 solar panels

How much maintenance do solar panels need?

The solar panel requires deficient maintenance. That can help you to save money. They require very little upkeep once they’re installed. It is important to keep the panels clean, as dirt and debris can reduce solar panel efficiency. In this case, you have to improve solar panel efficiency manually. So, you can see how to improve solar panel efficiency, or is there any easiest way to improve solar panel efficiency? However, you can simply wash them off with water, or use a soft cloth or brush to gently clean them. If you live in an area with heavy snow or rainfall, the panels may get cleaned naturally.

It is a good idea to check the panels periodically for any damage, such as cracks or scratches. While solar panels are designed to withstand the elements. They can still get damaged by severe weather or other external factors. But if you notice any damage, contact a professional to get it repaired.

Keep your eyes on the solar panel system’s performance to ensure that your solar panel system is producing the expected amount of energy. Many modern solar systems come with monitoring tools that allow you to track your energy production and detect any potential issues.

Can you use solar power during a power outage?

Yes, solar power can be a great solution during a power outage. However, let’s explain how you can use solar power to stay powered up during a blackout.

First of all, you will need a solar panel system installed in your home, office, and anywhere else. It can be done by a professional installer. The solar panels will collect energy from the sun and convert it into electricity, and this power is used in your home, office, and some other else.


In this case, you need some equipment, such as the battery, inverter, connector, stand, etc. You will need a battery to get a backup system to store the energy to use off sun period. It will allow you to use solar power even when the sun isn’t shining, or during cloudy weather. The battery backup system can be connected to your home’s electrical system.

During a power outage, solar panel systems will continue to generate energy as long as the sun is shining. With a properly designed solar power system and battery backup, you can stay powered up and comfortable during an extended blackout.

How many KW solar do I need?

Determining the size of the solar system you need depends on several factors, including your electricity usage, location, and budget. To calculate the size of the solar system you need to determine your daily electricity usage. This can be found on your monthly electricity bill, which will show your average daily usage in kilowatt-hours (kWh). Suppose your daily electricity usage is 30 kWh, you will need a solar system that can generate at least 30 kWh per day.

At another step, you will need to consider your location and the amount of sunlight your solar panels will receive. This is known as solar irradiance, which varies depending on factors such as latitude, season, and weather conditions. You can use online tools to estimate the solar irradiance in your area and calculate the size of the solar system you need to generate your desired amount of electricity.

However, we have given above the easiest way to solar system calculation for home. You will get actual knowledge that how many solar panels you need how much capacity inverter and battery you require, etc. You can also calculate small medium and big size areas to select solar panels by using this formula.  

Final thought

How much money do solar panels save? Yes, it is a significant question. The straightforward answer is solar panel system calculation can save your huge investments. let’s see the above calculation. The solar system calculation process involves a variety of scientific measurements and mathematical calculations to determine the physical characteristics and behavior of the celestial bodies that make up our solar system. Some of the key factors that are taken into account when calculating the solar system is that we have referred to in this article. The solar system calculation process is a complex and ongoing endeavor that involves a wide range of scientific disciplines.

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