How Many Solar Panels Do I Need?
A Simple Guide To Sizing Your Solar System
Author
Harry Dexter | Operations Director
Table of Contents
Author
Harry Dexter | Operations Director
Table of Contents
Introduction
Thinking about going solar? One of the first questions homeowners ask is, “How many solar panels do I need?” The number of panels your home needs depends on several key factors like your energy usage, location, and the efficiency of the solar panels you choose.
In this guide, we’ll break down everything you need to know to figure out how many solar panels you’ll need to power your home.
How Many Solar Panels Do I Need?
Every home is different, which means every solar setup will be, too. Here are the main factors that affect how many solar panels you’ll need:
1. Your Energy Usage
Start by looking at your electric bill. It should show your average monthly usage in kilowatt-hours (kWh). Most UK homes use around 225 kWh per month, but your number might be higher or lower depending on the size of your home and how energy-efficient it is.
Tip: Add up a full year of energy use to get your total annual kWh. This helps account for seasonal changes. You can also find this data on your Energy Bill.
2. Sunlight in Your Area
The amount of sunlight your home receives directly affects how much energy your solar panels can produce. Also the direction in which the panels are pointing affect the energy they harness.
South facing panels are the optimal placement, with East and West also working well. North facing is the least efficient placement of solar panels.
3. Solar Panel Wattage
Solar panels come in various wattages, typically between 440W and 500W. The higher the wattage, the fewer panels you’ll need to generate the same amount of power.
Example Costings
2 Bedroom HomeAnnual energy usage of 2300KWH
We Recommend
- Aiko 460w Panels x6
- Fox 3.7kW Inverter
-
Fox
5.2 kWh Battery
-
Estimated Break Even
7 Years 1 Month - Total Savings - £22,387
£6,400Including VAT
3 Bedroom HomeAnnual energy usage of 3300KWH
We Recommend
- Aiko 460w Panels x10
- Fox 5kW Inverter
-
Fox
5.2 kWh Battery
-
Estimated Break Even
5 Years 10 Months - Total Savings - £33,315
£7,400Including VAT
4 Bedroom HomeAnnual energy usage of 4300KWH
We Recommend
- Aiko 460w Panels x14
- Fox 6kW Inverter
- Fox 10.3kWh Battery
-
Estimated Break Even
4 Years 10 Months - Total Savings - £45,634
£9,200Including VAT
Other Factors to Consider
Even with the math, there are still a few things that could change your final panel count:
- Roof Space: Do you have enough room for 14+ panels? If not, you may need higher-efficiency panels.
- Battery Storage: If you’re adding a solar battery (like a Tesla Powerwall), your system may need to be larger.
- Energy Goals: Are you aiming for 100% offset or just trying to reduce your bill?
Work With A Solar Expert
Whilst this blog offers a simple guide to get you started, the best way to answer “How many solar panels do I need?” is by getting a custom quote. A solar professional, such as Energize Solar, can analyse your roof, usage, and location to give you an accurate system size.
Reputable companies, such as ourselves, offer free surveys and quoting which is brilliant for helping you understand your options at no cost.
If you’d like to learn more about solar panels then visit our complete guide on solar panels blog
Conclusion
So, how many solar panels do I need? The answer depends on your energy habits, where you live, and what type of solar equipment you choose. But with the right information (and a little help from the pros), figuring it out is easier than you think.
Ready to take the next step? Speak to us today to book in a free survey and quotation.
If you’d like to learn more about solar panels then visit our complete guide on solar panels blog
