How much solar power would I realistically need to run a house?

Feb 16, 2024

When it comes to powering your home with solar energy, you might be wondering just how much solar power you need to run your entire household. While it’s certainly possible to generate enough solar power to meet all your energy needs, it’s not always necessary to start with a massive solar array on day one. At Vital Solar, we believe in a flexible and sustainable approach to solar energy that allows you to grow your system over time while enjoying the benefits of clean, renewable power from day one.

Understanding Solar Panels

Before we dive into the question of how much solar power you realistically need, let’s take a moment to understand how solar panels work. Solar panels, often referred to as photovoltaic (PV) panels, capture sunlight and convert it into electricity. This clean and renewable energy source can help reduce your reliance on fossil fuels and lower your energy bills.

Solar Energy: A Clean and Sustainable Choice

In Auckland, where we are blessed with plenty of sunshine, along with a balance of overcast and rain, harnessing solar energy is not just an environmentally responsible choice, but also a financially savvy one., if you have the right system, Solar panels generate electricity during daylight hours, no matter the conditions, however some days will generate less, depending on the UV output of the sun,  any excess power can be stored in batteries or fed back into the grid for credits. This means that on sunny days, your solar system can potentially produce more electricity than you need, helping you save even more on your energy bills.

Solar Panel Generation

The amount of electricity your solar panels generate depends on several factors, including:

  • Panel Efficiency: The efficiency of your solar panels plays a significant role in determining how much electricity they produce. At Vital Solar, we exclusively use Enphase microinverters and Sunpower solar panels, known for their exceptional performance and safety features.
  • Sunlight Availability: Auckland enjoys a good amount of sunshine throughout the year. The more sunlight your panels receive, the more energy they can generate.
  • Panel Orientation and Angle: Properly positioning your panels and adjusting their angle can maximize their exposure to sunlight, optimizing energy generation.
  • System Size: The size of your solar panel system matters. Larger systems generate more electricity. However, as mentioned earlier, you don’t have to start with a massive system.

Benefits of Going Solar in Auckland

  • Reduced Energy Bills: By generating your electricity, you can significantly reduce your monthly energy bills. Over time, this can lead to substantial savings.
  • Environmental Impact: Choosing solar power means reducing your carbon footprint and contributing to a cleaner environment. It’s a step towards a more sustainable future.
  • Energy Independence: As you generate your electricity, you become less reliant on traditional energy sources, making you more self-sufficient and resilient to energy price fluctuations.

Start Small, Grow Over Time

At Vital Solar, we understand that not everyone needs a massive solar panel system right away. That’s why we encourage our clients to start small and grow their solar system over time. With Enphase microinverters and Sunpower solar panels, you can easily expand your solar installation as your energy needs evolve. Our goal is to be your “Energy Partner for life,” guiding you on your journey to becoming self-sufficient and renewable.

When assessing how much solar power you realistically need to run your house, it’s essential to understand that it’s not just about the size of your home or the number of appliances you use. It’s about your true energy focus. This is where a personal touch comes in, as your energy partner for life, I’ve seen firsthand how important it is to assess each household’s unique energy requirements.

Every home is different, and so are the energy needs of its residents. While some may prioritize powering their entire house with solar energy, others may choose to supplement their energy needs gradually. Our approach at Vital Solar is to work closely with you to determine your energy goals and design a system that meets those needs efficiently.

For some homeowners, starting with a smaller solar installation to cover specific appliances or areas of the house may be the perfect beginning. For example, you might begin with solar panels to power your water heater, lighting, or air conditioning system. This allows you to experience the benefits of solar energy without committing to a full-house system right away.

As your energy partner for life, we take pride in helping you navigate your energy journey. Our Enphase microinverters and Sunpower solar panels, combined with expert knowledge and state-of-the-art technology, make it easy to add more panels and expand your solar system as your budget and energy needs grow.

Benefits of Starting Small

Starting small with solar panels not only allows you to dip your toes into the world of clean energy but also provides several advantages:

  • Affordability: Smaller systems are generally more budget-friendly, making solar energy accessible to a wider range of homeowners.
  • Flexibility: You have the flexibility to choose which areas of your home or which appliances you want to power with solar energy initially.
  • Quick ROI: Smaller systems can provide a quicker return on investment, allowing you to enjoy energy savings sooner.
  • Easy Scalability: With Enphase microinverters and Sunpower solar panels, adding more panels to your system is a breeze when you’re ready to expand.

Assessing Your Energy Focus

To determine how much solar power you realistically need for your home, it’s crucial to assess your household’s energy focus. Here are some questions to consider:

  • What are your energy goals? Are you aiming to cover a specific percentage of your energy consumption with solar power, or do you want to go completely off the grid?
  • What is your budget? Your budget will play a significant role in determining the size of your initial solar installation.
  • Which appliances or areas of your home are energy-intensive? Identifying energy-hungry appliances or spaces can help you prioritize where to start with your solar panels.
  • Are you planning for future energy needs? Think about how your energy usage may change in the future. Do you plan to add electric vehicles or other energy-intensive equipment to your household?

At Vital Solar, we work closely with you to answer these questions and create a tailored solar solution that aligns with your energy focus. We believe that solar power is not a one-size-fits-all solution, and your system should reflect your unique needs and goals.


So, how much solar power do you realistically need to run a house? The answer lies in your true energy focus and your individual circumstances. While some homeowners may opt for a full-house solar installation from the start, others may choose to begin with a smaller system to supplement specific energy needs.

As your energy partner for life, we’re here to guide you on your journey to clean, renewable energy. Whether you’re interested in solar panels, solar energy, understanding solar panels, or the benefits of going solar in Auckland, we have the expertise and technology to help you achieve your goals.

Contact us today to start your solar energy journey with Vital Solar. Together, we’ll create a sustainable and customized solution that meets your unique energy focus and sets you on the path to a brighter, greener future

Our guarantee

With extensive experience and certification by New Zealand Master Electricians, we are the trusted solar energy systems provider for Kiwi homes and businesses. With the highest level of compliance available in solar installation, we only work with products covered by a manufacturer’s warranty and we guarantee all our workmanship.

Our commitment

Vital Solar is a proud member of SEANZ, the Sustainable Energy Association of New Zealand.

SEANZ is an independent organisation that works hard to drive our sustainable energy future, leading the promotion, support and innovation of solar PV and energy storage technologies.

Because we’re members of SEANZ, we work to a strict SEANZ Code of Conduct. It also means you can apply for financing from your bank for solar energy systems from Vital Solar.

From start to finish, our solar journey with Vital Solar has been superb. We did extensive research and obtained 5 quotes before (easily) deciding on Cam, Maryann and the Vital Solar team. Cam (MD) is highly knowledgeable about all matters solar, and patiently answered all our questions. (Ours is a tricky South facing site, so there were many questions). Maryann was super helpful and kept the ball rolling with logistics and other queries. We decided to get Sun Power panels with Enphase microinverters and two Enphase IQ 5P batteries. Vital Solar’s installation and service team (including Sam and Keenan) was very professional, helpful and tidy. After the installation was complete, Maryann also helped us get the grid connection sorted. Such great people! We did our solar due diligence, and recommend the Vital Solar team very highly. Thank you guys!😊💯
Suki Harding
Suki Harding
For our small installation onto our villa the discussion, ongoing communication, installation, and final product was all excellent. We highly recommend this company
Tom Robinson
Tom Robinson
Vital Solar are awesome. They will listen to what you want, and educate you where necessary so that you can get a system that works best for you and your home. They take pride in their work and do a tidy job with quality equipment. I had a few extra requests such as a Solar hot water power diverter, and that was provided and installed with no hassle. I've asked for more information about extras (e.g. batteries) since the install, and have received friendly advice and follow up. I would recommend them over the big guys who you will either never hear back from, or they will quote something from their computer without even visiting your site.
Ryan Maxwell
Ryan Maxwell
Cannot recommend highly enough. Vital Solar took the time to understand our issues and come back with excellent information- waaayyyyyy more information than the original installer had ever shared. Which meant we could make good decisions. GREAT service, fantastic communication and just lovely individuals to work with. Highly recommended.
sandy pearson
sandy pearson
Cameron and Maryann are engaged and knowledgeable. Dealing directly with the owner is a distinct advantage, and the fact that Cameron visited and assessed the site before quoting was a key point in our choosing Vital Electric.
Alan Merry
Alan Merry
Had vital come through for a consult, and ended up going with an Enphase system, knowledge with the whole process and incredibly happy with total install.They truly went above and beyond my expectations a awesome crew
Andrew Dick
Andrew Dick
Vital Solar really know their stuff. I appreciated the education on solar as part of the sales process. The Vital Solar installation team, in their Vital Solar uniforms, were professional and kept us well informed as the installation progressed. Having a 25 year guarantee backs up the quality of both the product and the service from Vital Solar, giving us peace of mind. It's been worth paying a bit more with Vital Solar than some of the other providers we approached, to get quality. We're delighted with our new system. Did someone say power prices just went up again - not for us. Thanks Vital Solar.
David Schischka
David Schischka
Cam and his team at Vital Solar were recommended through a mutual friend. Definitely made the right choice to go with them for our residential PV install. A pleasure to deal with.
Luke Gowing
Luke Gowing

Find out more about switching to solar

5 Collard Place, Henderson, Auckland 0610