Should You Add Battery Storage to a Solar PV System?

As solar photovoltaic (PV) systems gain popularity among UK homeowners seeking sustainable and cost-effective energy solutions, a common question arises: “Is it worth adding battery storage to my solar PV system?”

This short guide aims to explore the considerations and benefits of integrating battery storage with solar PV systems, providing valuable insights for homeowners in the UK.

Solar Panels and Battery Storage

by Stephen Hendy, Operations Manager Solar & Storage | published 16 February 2024

Understanding Solar Panels and Battery Storage

How Solar Panel Systems Work

Solar panel systems convert sunlight into electricity using photovoltaic cells. Typically, the energy generated is either used directly by the household or fed back into the national grid.

The Role of Battery Storage

Battery storage systems store the excess electricity generated by solar panels. This stored energy can be used when the solar panels are not producing electricity, such as during the evening or on cloudy days.

Advantages of Adding Battery Storage

Maximizing Solar Energy Usage

With a battery system, you can store surplus solar energy instead of exporting it to the grid. This allows for a higher self-consumption rate, meaning more of the energy you produce is used to power your home, reducing reliance on the grid.

Increased Energy Independence

Battery storage provides greater energy independence. You can rely on your stored energy during power outages – certain models only such as Tesla Powerwall – or when solar production is low, ensuring a consistent power supply.

Potential Cost Savings

Storing excess energy can lead to significant cost savings. By using stored solar energy during peak times when electricity rates are higher, you can reduce your electricity bills.

Reducing Carbon Footprint

Using more of your solar-generated electricity reduces your reliance on fossil fuels, contributing to a lower carbon footprint and supporting the UK’s environmental goals.

Considerations Before Investing in Battery Storage

Initial Cost

The main consideration is the cost of the battery storage system. It’s a significant investment on top of the solar PV system, and it’s important to calculate the potential return on investment.

Size and Capacity

Selecting the right size and capacity of the battery is crucial. It should match your energy consumption patterns and the output of your solar PV system.

Compatibility with Existing Solar Panel Systems

Nearly all solar PV systems are immediately compatible with battery storage solutions. Please talk to one of our energy experts to double-check what’s possible with your set-up.

Maintenance and Lifespan

Like any technology, battery storage systems can require maintenance, and they have a limited lifespan. Understanding these factors is important for long-term planning.

The best battery storage products come with product warranties of 10 years or more.

Tesla Powerwall Solar Battery Storage

Financial Incentives and Regulations

Feed-in Tariffs and Smart Export Guarantee

Under the Smart Export Guarantee (SEG), homeowners can earn money by exporting surplus solar energy back to the grid. Adding battery storage could reduce the amount of energy you export.

Government Grants and Incentives

There are various government grants and incentives available for renewable energy solutions.

For example, 0% VAT is available on all battery storage installations from 1 February 2024, whether the storage is installed at the same time as solar panels or retrofitted at a later date.


The decision to add battery storage to a solar PV system depends on several factors, including your energy usage patterns, financial considerations, and environmental goals.

While the initial investment is not inconsiderable, the benefits of increased energy independence, potential cost savings, and environmental impact are significant.

For UK homeowners looking to maximize their solar PV system’s efficiency and contribute to a more sustainable future, battery storage is certainly worth considering.