What is Energy Storage?

If you have a renewable energy system in your home, such as solar PV, any excess electricity you produce (and don’t use) is returned to the National Grid. UK households tend to consume more electricity in the morning and evening, therefore you can lose a lot of the energy you generate during the day. An energy storage system, in the form of a battery, allows you to save that excess energy, so you can use it when you need it. It’s a way of increasing your self-consumption and reducing your reliance on the grid.

Types of battery storage available

There are several types of battery storage on the market, but Lithium-ion and lead-acid batteries are the main type for domestic use. In general, lithium-ion batteries are regarded as the most cost-effective option. They can be more efficient than lead-acid batteries, weigh two thirds less, can discharge more stored energy, have a longer expected lifetime, and are more environmentally friendly. Although lithium-ion batteries could have a greater upfront cost than lead-acid batteries, they could offer greater long-term savings.

Will Energy Storage save me money?

According to Ikea, a typical UK home with solar panels uses just 40% of the energy it generates. The rest is sent back to the National Grid. With an energy storage system installed, households with solar panels could maximise the electricity they generate, therefore reducing electricity bills. So, whilst energy storage set-up fees may appear significant, there could be long-term savings to be made.

The Benefits Energy Storage

Lower Energy Bills

Home energy storage gives you the ability to store electricity when your household demands are low. You can then use it when your energy needs are higher, instead of buying energy from your supplier. If you have Economy 7 meter, certain energy storage products can also charge from the grid and store cheap off-peak electricity.

How much you can save depends on how much energy you generate, the size of your battery, your energy consumption, and your energy supplier’s fees.

Greener Energy

Energy storage enables you to be a more responsible energy user by reducing the demand for energy from non-renewable energy sources and reducing your carbon footprint.

Feed-in tariffs (fits)

The UK government introduced the Feed-in Tariff (FITs) scheme in 2010 and it ended on 31st March 2019. The aim of FITs was to encourage homeowners to invest in renewable energy. The scheme provided energy bill relief in three ways:

Generation tariff – a set rate that your energy supplier pays you per kWh of energy you generate.

Export tariff – your energy supplier pays you for each unit of energy that you export back to the National Grid. i.e. the energy you haven’t used.

Energy saving – the money you save by buying LESS electricity from your supplier because you can generate some of your own electricity.

The government adjusts FiT rates every three months and rates have gone down dramatically since their introduction. Buying back your surplus energy from suppliers costs you more than you sold it for. With an energy storage system, you can reduce that dependency.

UK Energy Storage Manufacturers and Suppliers

The energy storage market is growing in response to the UK’s need to reduce its dependency on non-renewable sources of energy. Manufacturers are competing to address the limitations of renewable energy sources and give homeowners greater energy independence.

Manufacturers available in the UK include:

  • BYD
  • Duracell
  • E.ON
  • Enphase
  • Growatt
  • LG Chem
  • Lux Power
  • Moixa
  • Nissan
  • Powercore
  • Powervault
  • Prime Hybrid Energy
  • Puredrive Energy
  • Pylon Tech
  • Samsung
  • SOLARWATT
  • Solax Power
  • SonnenBatterie
  • SoFar Solar
  • Tesla
  • Wattstor
  • BYD
  • Duracell
  • E.ON
  • Enphase
  • Growatt
  • LG Chem
  • Lux Power
  • Moixa
  • Nissan
  • Powercore
  • Powervault
  • Prime Hybrid Energy
  • Puredrive Energy
  • Pylon Tech
  • Samsung
  • SOLARWATT
  • Solax Power
  • SonnenBatterie
  • SoFar Solar
  • Tesla
  • Wattstor

Energy Storage Installation Costs

You can expect to buy an energy storage unit for between £2,000 and £6,000, depending on the system you choose. Installation could cost a minimum of £500 labour. You may need to pay an additional £1,000 – £2,000 depending on the system, where you want it installed and whether you are fitting batteries to an existing solar power system. Many UK installers offer deals for combined solar panel and battery installation.

Renewable energy and energy storage are still relatively new forms of technology. The price of energy storage systems and their running costs is likely to reduce as the technology develops and demand increases.

Find an installer

Using a Flexi-Orb member provides you with peace of mind knowing that they have been vetted and provide you with protection mechanisms.