Why Add A Battery To Your Solar System?

Solar battery storage is becoming an important tool for UK homeowners looking to make the most of renewable energy. Pairing a battery with your solar system isn’t just about storing power—it’s about gaining more control over your energy usage and reducing your dependence on the grid.

Power your home with Upvolt’s smart solar solutions.

In this guide, we'll take a closer look at how battery storage can enhance the performance of your solar system, the key factors to consider before making an investment, and whether it's truly worth the cost.

Solar Battery Solar System: Everything You Need to Know

• Solar battery storage can help lower energy bills, allowing homeowners to rely more on their own solar energy rather than purchasing electricity from the grid.
• A solar battery ensures that you don’t waste any power generated during the day by storing excess energy for later use, and can instead use it at night or during periods of high demand.
• Emergency backup power ensures continuity during blackouts or outages, providing peace of mind that essential appliances will keep running even when the grid fails.
• Storing and using your own solar energy reduces reliance on fossil fuel-generated electricity.

Power Up! The Perks of Adding Battery Storage

If you're unsure whether adding battery storage is the right choice for your home, consider the benefits it brings—maximising solar energy, lowering costs, and boosting energy independence. Here are the key advantages of integrating battery storage with your solar system:

Cutting Electricity Costs

Smart energy storage can lead to substantial savings. Using stored power during peak pricing periods helps you avoid high grid energy costs and rely more on your free solar electricity. Battery storage can increase savings by up to 70%, with some homeowners saving up to £796 per year on their energy bills.

Maximising Solar Energy Efficiency

A solar battery ensures that no excess solar energy goes to waste. Instead of sending surplus power back to the grid, it’s stored for use at night or on cloudy days. According to National Energy Action, a 6kWh battery can boost solar self-consumption from around 20–30% to over 70%, making your system far more efficient.

Emergency Backup Power

Solar batteries provide backup power during outages, ensuring essential appliances keep running when the grid fails. Whether due to storms, maintenance, or unexpected blackouts, battery storage offers peace of mind and uninterrupted energy supply.

Lowering Your Carbon Footprint

By storing and using more of your own solar energy, you reduce reliance on fossil fuel-generated electricity. The Energy Saving Trust estimates that a typical home solar system can cut carbon emissions by over a tonne per year—the equivalent of driving 3,600 miles.

Is a Battery Worth It? Factors to Consider

Investing in a solar battery depends on your energy usage and financial goals. The return on investment (ROI) varies based on key factors, which influence how well battery storage fits your needs.

Your Energy Usage Patterns

To decide if a solar battery is right for you, first assess your daily electricity consumption. Factors like when you use the most energy, your average daily electricity usage, and how your energy needs change with the seasons can all impact how much you’ll benefit from a battery. 

For example, if you typically use the most electricity in the evening when the sun isn’t shining, a solar battery can store excess energy generated during the day for use at night. This could help you reduce reliance on the grid during peak times, lowering your electricity bills. 

On the other hand, if your energy usage is more consistent throughout the day, you may not need as large a battery, as you’ll be using more of the energy generated while the sun is up.

Selecting the Right Battery Capacity

Choosing the correct battery size is important for maximising the efficiency of your solar energy system. Consider how much energy your solar panels generate and how much energy your household consumes. A typical 4kWp solar panel system may generate 10-16 kWh per day, depending on the time of year. Therefore, you'd want a battery with a capacity to store most or all of that energy. 

You should also take into account how much of the stored energy you can actually use (typically around 85% to 95%) and how often you plan to access that stored energy.

Balancing Upfront Costs and Long-Term Savings

Although the initial cost of installing solar panels and a battery system can reach up to £18,000, the long-term savings and benefits make it a worthwhile investment. Solar panels can reduce electricity bills by up to 70%, depending on your energy usage. 

Programs like the Smart Export Guarantee (SEG) allow homeowners to sell any surplus energy back to the grid, creating an additional income stream. This combination of reduced bills and potential earnings from excess energy can significantly offset the initial investment. With a payback period of up to 14 years, depending on installation costs, energy tariffs, usage, and other factors, solar energy can be a financially viable option in the long run.

Upvolt’s Skygate™ platform ensures you maximise your solar energy by optimising energy flows, charging your battery and EV, and running appliances like your heat pump when electricity prices are at their lowest or even negative. It also connects to the power exchange, automatically purchasing the cheapest electricity when needed, and taps into affordable wind energy during times when the sun isn’t shining. 

With the Skygateâ„¢ platform and a flexible energy tariff, you can ensure your household consumes the most cost-effective energy available, reducing reliance on the grid and further improving long-term savings.

Can You Add a Battery to an Existing Solar System?

Yes, you can add a solar battery to an existing solar system in the UK. If you already have solar panels installed, adding a battery storage system is a common way to increase the efficiency of your setup and store excess energy for later use. 

The process typically involves installing an inverter that is compatible with both your solar panels and the battery. The costs for adding a 5kWh solar battery to an existing system can vary depending on the complexity of installation and the specific battery model. 

Should You Invest in Solar Battery Storage?

Adding a solar battery to your system can make a big difference. It enhances your energy independence by storing excess solar power, which you can use when the sun isn’t shining, reducing your reliance on the grid. This helps lower your electricity bills, as you’ll rely more on your own energy rather than expensive grid power.

To figure out if a solar battery makes sense for you, consider your energy needs, current usage, installation costs, and potential savings. Think about when your energy demand is highest during the day and evening, and how much energy your solar system generates. Programs like the Smart Export Guarantee also allow you to sell surplus energy back to the grid, which can boost your savings even more.

With rising energy costs and the increasing desire for independence, a solar battery is an investment that can save you money in the long run while supporting a more sustainable future.

About Upvolt

At Upvolt, we provide high-performance solar panel and battery storage solutions designed to optimise your energy efficiency and reduce reliance on the grid. Our lithium iron phosphate (LFP) batteries, starting from 5kWh, deliver reliable, long-lasting energy storage, with up to a 15-year performance warranty for added peace of mind.

We offer complete supply and installation of both solar panels and battery storage systems, creating a seamless, integrated solution for generating, storing, and using your own renewable energy. Sourcing only top-quality components from trusted global manufacturers, we ensure superior technology, charge/discharge rates, and durability.

Our experienced team handles every step of the process—from system design and installation to commissioning and ongoing maintenance—providing a hassle-free experience and ensuring optimal performance. Additionally, our Skygate™ platform lets you monitor and optimise your energy usage through a simple, user-friendly app.

Ready to transition to solar energy and battery storage? Contact us today for a free quote and let Upvolt’s experts design the ideal renewable energy solution for your home.

FAQ

Will a solar battery eliminate my electricity bill?

A solar battery can significantly reduce your electricity bill. Storing excess solar energy for use during the evening or cloudy days allows you to rely less on grid electricity, potentially lowering your bill by up to 70%.

How much battery storage do I need for my home?

The amount of battery storage you need depends on your household’s energy consumption and solar power production. A typical home may require a 5-10 kWh battery, which can store enough energy for use during the evening or cloudy periods. A larger battery is ideal for higher energy usage or for backup power during blackouts.

Can I install a solar battery later if I already have solar panels?

Yes, you can add a solar battery to an existing solar system. Many homeowners choose to install a battery later to improve energy independence and maximise savings. The process involves installing an inverter compatible with both your solar panels and the battery.

What is the cost of a solar battery storage system?

The cost of adding a 5kWh solar battery to an existing solar system is typically around £6,000, depending on the installation requirements and battery model. If you’re installing a new solar system with battery storage, the total cost can reach up to £18,000, depending on the size and specifications of the system.

Do solar batteries work during a power cut?

Yes, solar batteries can provide backup power during a power cut. If your system is equipped with an appropriate inverter and setup, the battery will supply energy to your home during outages, ensuring essential appliances continue to operate even when the grid fails.

Alex Lomax

CEO & Co-Founder

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