How Many Solar Panels Do You Need to Run Your House?

Joe Brennan
Feb 6, 2023

Are you finding your energy bills skyrocketing with each passing month? Struggling with how to curtail it? Have you thought about switching to solar energy? Let’s dive into the details of how many solar panels you need to run your house and how Going Solar, a top-tier solar panel installation company in Ireland, can guide you through the process.

Understanding Solar Energy Consumption

When we talk about solar energy, it’s essential first to understand your household energy consumption. Your energy consumption determines how many solar panels you need to run your house. Most households in Ireland use around 4200 kWh per year, but your usage may vary depending on your lifestyle and the size of your home. It’s recommended to check your electricity bill to get a more accurate number.

How Much Energy Does a Solar Panel Produce?

Solar panels’ output varies, mainly due to the type of panel, its size, and the amount of sunlight it receives. On average, a standard solar panel produces around 250-300 watts per hour. However, this is an ideal figure, and the actual output can be lower due to factors like weather, angle of installation, and dust or debris on the panel.

Calculating the Number of Solar Panels You Need

To calculate how many solar panels you need to run your house, you’ll need to consider your energy consumption, the panel’s output, and the amount of sunlight in your area. Here’s a simplified formula:

(Number of kWh you use per year / average hours of sunlight per day) / solar panel output (kWh) = number of solar panels

In Ireland, the average sunlight hours per day is approximately 3.6. Let’s take an example of a house consuming 4200 kWh per year, and we’ll use 250 watts (or 0.25kWh) as the solar panel output. The calculation would be:

(4200 / (3.6*365)) / 0.25 = 14 panels, approximately

Maximising Your Solar Power Efficiency

Once you have an idea of how many solar panels you need, it’s crucial to consider how to maximise their efficiency.

Optimal Placement

In Ireland, solar panels should face south for the best sunlight exposure. The angle of the panels also plays a part in their efficiency; a 35-degree tilt is often ideal for Irish homes.

Energy-Efficient Appliances

By replacing your older appliances with energy-efficient models, you can significantly lower your energy consumption, thus reducing the number of solar panels needed.

Home Insulation

A properly insulated house retains heat in the winter and stays cool in the summer, reducing the need for air conditioning and heating. This lowers your overall energy consumption.

Utilising Solar Batteries

Solar batteries store excess energy generated by your solar panels. This stored energy can be used when sunlight is unavailable, ensuring a constant electricity supply. Going Solar offers top-notch solar battery solutions to help you make the most of your solar power system.

The Benefits of Going Solar

Investing in solar power provides numerous benefits. It reduces your energy bills, decreases your carbon footprint, and can even increase your property value.


Solar power is a renewable source of energy that can significantly reduce your electricity bills. With the right number of solar panels, you could potentially produce enough electricity to run your house entirely on solar power. Imagine the savings when you don’t have to pay for electricity!

Environmental Impact

Solar power is clean and green. By choosing solar, you reduce your reliance on fossil fuels, decreasing your carbon footprint. It’s a small step you can take towards preserving our planet for future generations.

Increased Property Value

Homes equipped with solar power systems are often more attractive to potential buyers. If you plan to sell your house, the solar panels could increase its value.

Energy Independence

You can gain energy independence with a solar power system and battery storage. You won’t have to worry about power outages or fluctuating energy prices.

Going Solar in Ireland: Your Path to a Greener Future

Transitioning to solar energy is a significant step towards a sustainable future. Going Solar is committed to providing top-notch solar panel installation services to help you harness solar energy effectively.

Bespoke Solar Solutions

Understanding that every home has unique energy needs, we offer bespoke solar solutions that best suit your requirements. We evaluate your energy consumption patterns and design a solar system that fits your needs perfectly.

Expert Installation

Our team of seasoned professionals ensures a seamless and efficient installation process. We strictly adhere to the highest safety and quality standards, ensuring your solar panels deliver optimal performance.

Comprehensive Post-installation Support

Our commitment to you extends beyond installation. We provide thorough post-installation support and maintenance services to keep your solar panels performing at their best.

Are You Ready to Tap into Solar Power?

With the appropriate number of solar panels, you can power your entire house and contribute to a greener planet. Ready to find out “How many solar panels do you need to run your house?” Let’s proceed.

Why Choose Going Solar?

At Going Solar, we believe in empowering every Irish household with the benefits of solar energy. Here’s why we are your best choice:

Comprehensive Consultation

Our team helps you understand your energy needs and guides you through the process of determining the right number of solar panels, their ideal positioning, and the potential savings you can expect.

Premium Quality Products

We only install top-notch solar panels designed for maximum energy production and longevity. These panels are built to endure the Irish weather, providing reliable energy for years.

Skilled Installation

Our expert installation team ensures your solar panels are safely and correctly installed. We handle all the details, allowing you to relax as your home transitions to solar power.

The Economic Advantages of Going Solar

Investing in solar panels isn’t just an environmentally conscious decision—it’s also financially smart.

Lower Energy Bills

With solar panels, you generate your own electricity, reducing your reliance on the grid. This can lead to substantial savings on your energy bills and in some cases, might even eliminate them completely.

Incentives and Grants

The Irish government offers various incentives and grants to promote the use of solar energy. These grants, provided by the Sustainable Energy Authority of Ireland (SEAI), can significantly offset the initial cost of solar panels and battery energy storage systems.

Discover Your Solar Solution With Going Solar

By understanding your solar energy needs, take the first step towards a greener, more sustainable future. Going Solar is here to help you determine “How many solar panels do you need to run your house?” and guide you through every stage of your solar journey. Don’t wait any longer – contact us today to get started on harnessing the power of the sun and empowering your home with clean, renewable energy.

Planning a switch to solar energy?

Contact Going Solar now and Get Free Advice & Quote Within Minutes!
Get A Free Quote

Frequently Asked Questions

How many solar panels are needed to power a typical house?

The number of solar panels needed to power a typical house depends largely on the household’s energy consumption and the location’s sunlight availability. On average, an Irish household might require between 12-16 solar panels to meet its energy needs entirely.

How do I calculate how many solar panels I need?

First, identify your annual electricity consumption from your utility bill to calculate the number of solar panels you need. Then, divide that number by the estimated annual production of a single solar panel (taking into account your location’s average sunlight hours). This will give you a rough estimate of the number of panels required.

Is 4kW solar enough?

A 4kW solar system is usually sufficient for a small to medium-sized household. However, the efficiency of a 4kW system can depend on factors such as the household’s energy usage, the amount of sunlight received, and the home’s energy efficiency.

Can 10 solar panels power a whole house?

Whether 10 solar panels can power a whole house depends on the house’s energy consumption and the solar panels’ power output. If each panel produces 250W, 10 panels could generate about 2.5kW, which might be sufficient for a small, energy-efficient home.

Can I have too many solar panels?

Technically, you can’t have “too many” solar panels, but installing more panels than needed is not cost-effective to meet your energy requirements. Also, your utility may limit the size of your solar system based on your previous year’s electricity consumption. Remember, the goal is to make your home more energy-efficient, not just to install more panels.

Can a house run fully on solar panels?

Yes, a house can indeed run fully on solar panels. However, it requires a properly sized solar panel system to match the home's energy use, and often, an energy storage solution like a battery system to store excess power for use when the sun isn't shining (e.g., at night or on very cloudy days).

Get a FREE Consultation & Quote

Fill out the form below to book a free consultation with one of our experts and also receive a no-obligation quote.

Check - Elements Webflow Library - BRIX Templates

Thank you

Please check your inbox to download your Free EBook!
Oops! Something went wrong while submitting the form.
*FYI, parts of this blog post were drafted by artificial technlogy. But rest assured, it's been thoroughly researched, edited, reviewed and me & my team.
Author Fahad Zahid
Founder @ Going Solar

Joe Brennan, the founder of Going Solar, is dedicated to making solar power mainstream in Ireland and meet SEAI objectives. With a focus on affordability and sustainability, he is bringing renewable energy solutions to homes, reducing costs & environmental impact.