Your guide to solar panel battery storage.

What is a solar battery?

A solar battery, also known as solar power storage, enables you to store the electricity generated by your solar panels for later use. By harnessing the power of the sun, you can utilise renewable energy and reduce your reliance on the grid.

We offer solar batteries as part of our solar panel installation packages, or you can integrate them into your existing solar panel system.

Our dedicated team of solar and battery storage experts will guide you in choosing the right power storage solution for your needs.

The benefits of adding solar battery storage.

Energy independence.

With solar battery storage, individuals and businesses can change to become more independent from traditional energy suppliers, liberating themselves from the shackles of reliance on conventional energy sources. By generating and storing their electricity, they are no longer solely dependent on the grid, safeguarding against potential power outages and fluctuating electricity prices.

Cost savings.

Harnessing the sun's energy and storing it for later use can lead to cost savings in the long run. Investing in solar battery storage becomes an economically wise decision, paying off the initial investment and even generating returns over time.

Environmental benefits.

One of the most crucial aspects of solar battery storage is its positive impact on the environment. By shifting towards renewable energy sources, we can significantly reduce our carbon footprint and combat climate change, making a significant contribution to a greener planet.

How solar batteries work.

Solar panel batteries store the surplus energy produced during the day and release it for use when the sun is not shining. There are two main battery technologies currently used: lithium-ion and lead-acid. Both types are designed to handle the cyclic charging and discharging necessary for solar energy storage.

When sunlight hits a solar panel, the solar cells convert it into direct current (DC) electricity. The DC electricity flows to the inverter, where it is converted into alternating current (AC) suitable for powering household appliances and devices. If the electricity demand in your home is lower than what the solar panels generate, the excess DC electricity can be diverted to charge the battery.

During the night, when your home requires electricity, the solar battery discharges its stored energy to power your appliances and devices, allowing you to benefit from solar power even after sunset.

Why choose a battery storage from E.ON?


0% APR Finance.

Spread the cost of a home battery system with our range of flexible payment options, including interest-free finance.


Exclusive solar tariff.

E.ON solar customers are eligible to receive exclusive Smart Export Guarantee (SEG) tariffs.


A trusted provider.

We've installed thousands of solar panel systems across the UK. You're in safe hands.


Peace of mind.

Your investment is protected with our 10 year warranty on battery storage products.

Adding a solar battery to existing PV systems.

For more complex or larger systems, or when there's already solar panels installed and you want to add a battery, you'll need separate battery and PV inverters. The battery is connected to the PV system on the AC side of the inverters, often referred to as "AC connected" or "AC-coupled" batteries.

Types of solar batteries.

In the realm of solar batteries, several types are available, each with its own characteristics and applications. Here are the main types of solar batteries:

  • Lead-acid batteries: Lead-acid batteries are one of the earliest and most common types of rechargeable batteries. They are affordable but have a shorter lifespan compared to other options. These batteries are suitable for smaller solar setups and off-grid applications.

  • Lithium-ion batteries: Lithium-ion batteries have gained popularity in recent years due to their high energy density and longer lifespan. They are more efficient than lead-acid batteries and are commonly used in residential and commercial solar energy storage systems.

  • Flow batteries: Flow batteries store energy in liquid electrolytes contained in separate tanks. They are known for their scalability and long cycle life, making them a good choice for large-scale solar storage applications.

  • Nickel cadmium batteries: Although less common in solar applications today, nickel cadmium batteries have been used historically. They have a long lifespan and can withstand extreme temperatures, but they are less environmentally friendly than other options.

In the UK, the two most commonly available solar batteries are lead-acid and lithium-ion batteries. Among these, lithium-ion batteries are preferred for their higher efficiency and longer lifespan.

Make the most of your solar panels.

With solar battery storage, you can make the most of your solar panel system by saving excess energy for later use. By opting for renewable energy and reducing your reliance on the grid, you can both contribute to a sustainable future and save money on your energy bills.

We offer a range of solar battery options, and our expert team is here to assist you in choosing the perfect solution for your home or business. Get in touch today for a solar battery quote and take a step towards a greener and more efficient energy future.

Explore the power of commercial solar battery storage.

Discover reliable and efficient commercial solar batteries for your business or commercial needs. Explore our selection of high-performance solar storage solutions designed to boost energy efficiency and reduce costs.

Explore commercial solar batteries now.

Frequently asked questions about solar batteries.

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