Battery Storage

What is PV battery storage?

A solar battery stores the excess electricity generated by solar panels during the day. This stored electricity can then be used at night or during times where your solar panel generation is low. Battery storage can reduce your energy bills.

How does battery storage work?

Excess electricity that you do not use from your solar panels is automatically sent back to the grid. Installing a battery will store this excess electricity instead. This stored electricity can then be used when you need it, such as in the evening or where you are consuming more energy than you are producing. Your battery will also help provide extra power if you are using a high energy appliance which requires more energy than your solar panels can produce.

By default, electricity used in your home will first come from the direct generation from your panels, then your battery, then the grid, which is controlled by your inverter.

Any unused electricity is exported back to the grid when your battery is full, or when you schedule it to (which you may want to do, as some energy companies may pay you more for exporting electricity at peak times).

Typically, people use more energy at night, this makes a solar battery particularly useful as you can store and use solar generated electricity in the evening.

How do you use the energy that the battery has stored?

Your home will automatically use the power stored in your battery before it draws electricity from the grid. Most modern storage batteries allow you to monitor your electricity generation and storage via a mobile app or through an online account, some let you access your system remotely and decide which devices you want your battery to power and set charge and recharge times.

Will I need to change tariff?

You can take advantage of cheaper electricity at off-peak times to charge your battery for use at a time when you need it or sell this back to the grid at a higher rate. You will need to consider switching to a tariff that offers cheaper off-peak electricity. The tariff you choose depends on your personal needs, so you should shop around to find the best tariff for you. It is important to note that most tariffs will require you to install a smart meter (if you do not already have one).

What does the install involve?

Battery installation is a relatively simple process and can be finished in half a day. You will need to make sure the area where the battery will be installed is accessible and free of clutter. Additionally, you will need to give the installer access to the spaces they need to work in – both inside and outside. You’ll be advised on the best location for your battery during an on-site survey. The best locations are cool and easily accessible. This could be outside; a garage or utility room and the battery will be mounted on a bracket to an appropriate wall/floor.

What will it cost me?

If you are an owner-occupier and meet the grant criteria, then it will cost you absolutely nothing. The grant will cover the complete cost of the installation and any associated surveys.

Where’s the catch?

There isn’t one. Any enquiry you make will be without obligation, you don’t have to have the work done until you are completely happy with the plan.

This programme is funded through the Department of Energy Security & Net Zero and administered on behalf of Norfolk Councils by Broadland and South Norfolk Councils.

What do I do next?

You can call us on 01603 430103 to discuss this further or complete our enquiry form.

Still want to know more?

The Energy Saving Trust provides general advice and guidance about energy storage: Energy storage options explained - Energy Saving Trust.