How many solar panels and batteries do I need to go off-grid?

By South West Tech

The number of solar panels and batteries you need depends entirely on how much electricity you use each day.

There isn't a standard off-grid system size, because every property has different energy requirements.

Factors that affect the size of your system include:

  • Your average daily electricity consumption.

  • The number and type of appliances you use.

  • Whether you use high-demand equipment such as air conditioning, pumps or welders.

  • How many days of battery storage you want during cloudy weather.

  • Your location and the amount of available sunlight.

An off-grid system needs to generate enough solar energy during the day while also storing sufficient power to keep your property running overnight and through periods of poor weather. That's why careful system design is essential.

Calculate Your Off-Grid Requirements

The easiest way to estimate the size of your off-grid system is to start by calculating your daily electricity usage.

Our Off-Grid Load Calculator helps you estimate how much energy your appliances and equipment consume each day. Once you know your daily load, you can use our Solar System Size Calculator to estimate the number of solar panels required, and our Off-Grid Battery Size Calculator to estimate the battery storage needed to power your property reliably.

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A solar system size calculator app with a house equipped with solar panels in the background and icons of solar panels and a house, illustrating solar energy calculation for off-grid and residential needs.
An infographic displaying a remote control with battery icons and a device with a lightning bolt symbol, promoting off-grid battery size calculation for off-grid systems, highlighting features like system compatibility, battery size calculation, and reliable results.