As energy prices continue to rise and concerns about climate change grow, more UK homeowners are considering battery storage systems for their homes. These systems promise greater control over energy use and reduced reliance on the grid. But are they worth the investment? This blog explores the ins and outs of battery storage to help you make an informed decision.
What is a battery storage system?
A battery storage system is a device that stores electricity for later use. Think of it as a giant rechargeable battery for your home. These systems come in various sizes and types. The Tesla Powerwall 3, which launched in the UK in June, is one of the best examples of a battery storage system currently available.
When your solar panels generate more electricity than you’re using, instead of sending it back to the grid, the excess power charges your battery. Later, when your panels aren’t producing enough energy to meet your needs, you can draw power from your battery rather than buying from the grid.
The benefits of battery storage
Battery storage systems offer a range of advantages for homeowners with solar panels. Here’s how they can enhance your home energy setup and potentially save you money.
Maximising self-consumption
Self-consumption when you use the electricity you generate yourself rather than exporting it to the grid. With a battery storage system, you can significantly increase your self-consumption rate.
Without storage, you might only use about 30-40% of the electricity your solar panels generate. The rest gets exported to the grid. But with a battery, you can store that excess energy and use it later, increasing your self-consumption rate.
It means you get more value from your solar panels. Instead of selling excess energy to the grid at a low rate and repurchasing it at a higher rate later, you’re keeping more of that valuable energy for yourself.
Energy bill savings
Increasing your self-consumption reduces your reliance on grid electricity, which translates directly into lower energy bills. The amount you save will depend on various factors, including the size of your solar system, your energy use patterns and the capacity of your battery.
But the savings don’t stop there. Many electricity providers charge more during peak times, typically in the evenings. With a battery storage system, you can charge your battery during off-peak hours when electricity is cheaper and then use the stored energy during peak times. This practice, known as ‘load shifting’, can lead to substantial savings on your energy bills.
Increased energy independence
A battery storage system gives you more control over your energy use. You’re less reliant on the National Grid, which means you’re less affected by power cuts and energy price fluctuations.
During a power cut, most solar panel systems shut down for safety reasons. But if you have a battery storage system with backup functionality, you can keep your essential appliances running. This increased resilience can be particularly valuable in areas prone to power cuts.
Environmental impact
Using more of the clean energy you generate helps reduce your carbon footprint. Every kilowatt hour (kWh) of solar power you use is one less kWh of electricity from the grid.
Moreover, by smoothing out the peaks and troughs in electricity demand, battery storage systems can help balance the grid. This makes it easier to integrate more renewable energy sources into our national energy mix, supporting the broader transition to a low-carbon economy.
Financial incentives and savings
Under the UK Government’s Smart Export Guarantee (SEG) scheme, energy suppliers pay small-scale generators for excess renewable electricity exported to the grid.
With a battery storage system, you can optimise your exports to maximise your SEG payments. For example, you could store excess energy during the day and export it during peak times when rates might be higher.
Some energy suppliers also offer time-of-use tariffs, where electricity prices vary throughout the day. With a smart battery system, like the Powerwall 3, you can take advantage of these price differences by buying and storing electricity when it’s cheap and using it (or even selling it back to the grid) when prices are high.
Retrofitting
If you already have solar panels, in most cases, you can add a battery storage system to your existing setup. This process, known as retrofitting, can breathe new life into your older solar installation, helping you get more value from your initial investment.
However, there are some considerations to keep in mind. The compatibility of your existing inverter, the age and efficiency of your solar panels, and the available space for the battery unit can all affect the feasibility and cost of retrofitting.
It’s also worth noting that some newer all-in-one systems that combine solar inverter and battery storage functions can be more efficient than retrofitted systems. If your existing solar installation is nearing the end of its life, it might be more cost-effective to upgrade the entire system rather than just adding a battery.
Factors to consider before investing in a battery storage system
While battery storage offers numerous benefits, it can also require a significant upfront investment. The cost can vary widely depending on the size and type of system, but you’re typically looking at several thousand pounds.
To determine if this investment is worthwhile for you, consider the following:
- Your energy consumption: If you use most of your electricity when the sun is shining, a battery might not offer significant additional benefits over solar panels alone.
- The size and efficiency of your solar PV system: A larger, more efficient solar system will generate more excess energy to store, potentially justifying the cost of a battery.
- Your current and projected energy costs: If electricity prices continue to rise, the savings from a battery system will increase over time.
- Your motivations: While financial savings are essential, you might also value increased energy independence or reducing your carbon footprint.
- Future energy price projections: As battery technology improves and production scales up, prices are likely to fall, potentially making a future investment more attractive.
How can Electrical Innovations (Derby) Ltd help?
Investing in a battery storage system can offer numerous benefits, from lower electricity bills to greater energy independence, not to mention a reduced carbon footprint. The financial case is strengthening as the technology improves, costs decrease, and energy prices rise. However, the value proposition will vary depending on your circumstances. It’s crucial to carefully assess your energy needs, consumption patterns and long-term goals before making a decision.
If you’re committed to maximising your renewable energy use or are looking to futureproof your home against rising energy costs, a battery storage system could be a worthwhile investment. That’s where Electrical Innovations can help.
We specialise in installing battery storage systems, along with solar panels and inverters, to give you a complete solution. Our friendly, expert team is here to guide you through the options, help you understand the benefits and potential savings, and recommend the best system for you and your home. To learn how we can help you save money on your electricity bills with a new battery storage system, give us a call today.
