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Renewables: Solar Battery Storage

If you have Solar Photovoltaic Panels on your roof, they will generate electricity during the day to use in your home. However, at night you will still have to buy electricity from your supplier. 

Normally, any electricity generated in the day that you don't use leaves your property and is used by the local electricity grid. However, with a battery storage unit such as a Tesla Powerwall, you can store your surplus solar electricity and use it to power your house at night, reducing your energy bills and protecting you from future energy price increases.

The following graphs show a typical PV system with and without battery storage. Please note that actual patterns will vary according to personal routine, season and position of the solar PV system.

Stand-alone PV system:

Source: Domestic Batteries, National Energy Action (2019).

PV with integrated battery storage:

Source: Domestic Batteries, National Energy Action (2019).

For a more detailed guide on solar battery storage, you can refer to BRE's Batteries and Solar Power guide:

Batteries and Solar Power: Guidance for domestic and small commercial consumers

For more information contact Action Surrey on 0800 783 2503 or email

Alternatively, fill out our enquiry form online to obtain a survey and no-obligation quote.

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*All figures are taken from the Energy Saving Trust April 2019 figures