How many solar panels do I need? Could you really live off-grid on just solar power?

white house bungalow with lots of solar panels on roof
(Image credit: Getty Images)

Asking 'how many solar panels do I need' is a practical and financial question to consider before adding this type of renewable tech to your home. 

Not only are solar panels often costly, but you don't want to have everything installed only to find that the power generation is far below what you expected or perhaps need for your home and lifestyle. 

David Hilton

David is a renewables and ventilation installer, with over 35 years experience, and is a long-standing contributor to Homebuilding and Renovating magazine. He is a member of the Gas Safe Register, has a Masters degree in Sustainable Architecture, and is an authority in sustainable building and energy efficiency, with extensive knowledge in building fabrics, heat recovery ventilation, renewables, and also conventional heating systems. He is also a speaker at the Homebuilding & Renovating Show. 

Passionate about healthy, efficient homes, he is director of Heat and Energy Ltd. He works with architects, builders, self builders and renovators, and designs and project manages the installation of ventilation and heating systems to achieve the most energy efficient and cost effective outcome for every home.