The Definitive Guide To Choose Right Solar Panels In 2023

installing solar panels

The solar panels are a great way to power your home with clean energy. Setting up a properly-sized system is important if you want to save money on the electricity bill every month.

Calculating how many solar panels you’ll need can be a bit complex. Looking for the professional help is a necessary, but you can do some of the most basic math by yourself.
If you want to learn what solar panels your home will need, this guide will walk you with the necessary important calculations.  

Determining Electricity Usage of Solar Panels

Before you can dive into understanding how many solar panels you’ll require, you need to know how much electricity you use on a regular basis now. This might be difficult to figure out if you have recently moved to a new home. It is best to have one full year of electric bills at your disposal so you can accurately measure how much power you use on a daily, monthly, and annual basis.
When looking at your bill, you should see the total number of kilowatt hours (kWh) you were charged for. Figure out how many kWh you used over the course of the past year by adding up that number from each of your monthly bills.  

Solar Panel Power Rating

It can be tricky to decide how many solar panels you’ll need because each panel will have a different power rating. This is measured in watts (W) and measures the electrical output of the panel. For the most part, you will find that range from 250 to 400 watt solar panel

Solar Panels Production Ratio

The final number you’ll need to know is the actual production ratio of your newly solar panels. It measures the energy output in kWh compared to the system size. This can depend on how much sunlight you get around your home in any given year. The ratio is calculated by dividing the actual kWh production by the system size. For example, a 10 kW system that produces 15 kWh of electricity would have a production ratio of 1.5.  

Figuring Out The Math Method of Solar Panels

In order to figure out how many solar panels you’ll need, you will have to do some math based on the numbers you found in the first three sections. The formula is usually denoted as:
Number of panels = system size/production ratio/panel wattage
Each number gets divided by the next number to give you the final tally of how many solar panels you will need. This will give you the unique number needed based on your electric usage and the specific panels you are considering purchasing.


Our range of solar electricity panels in WinSeven company use the latest in cutting edge technology allowing you to capture the sun’s energy and convert this solar power into electrical current to power a range of appliances. Our panels use crystalline silicon technology which is more efficient than amorphous or thin film solutions, particularly in lower light conditions.