If you already have solar panels or you’re in the process of organising your solar PV installation, pairing your solar system with solar battery storage can maximise your savings and give you more energy independence. At SolarTherm UK, we help homeowners across Essex, Kent and the wider South East make the most of their solar PV system by storing surplus energy for when they need it most.
This guide will explain how solar batteries work, the benefits and help you work out whether they are worth it for your home.
How Does Solar Battery Storage Work?
Solar panels generate electricity during the day, but they often produce more electricity than what you can use throughout the day. Without a solar battery, the surplus energy is sent back to the grid, and you get paid through the Smart Export Guarantee (SEG) for this. However, if you are out of your property during the day, and use most of your power in peak evening hours, it makes sense to install a solar battery, so that surplus electricity is stored instead, ready to use in the evenings or on low generation days. Less reliance on expensive grid electricity will lower energy bills further and help you take back control of your power.
What Size Solar Battery Do I Need?
The right size battery for your property depends on your energy use and your solar PV system size. If you have a gas or oil heated home, your electricity usage will be lower than someone with a heat pump or electric heating. At SolarTherm UK, we ask to see your electricity bill, so we can assess your average electricity use. We’ll also ask about your future plans, if you are planning to add a heat pump in the future or buy an EV we can help you plan by designing a solar PV and battery storage system that can accommodate the increase in electricity consumption.
How Much Does Solar Battery Storage Cost?
A solar battery can add a considerable amount to the cost of your solar PV system, so making sure you choose the correct one will make all the difference to your investment costs and returns. A small system can start from around £2,500 with larger systems costing upwards of an additional £10,000. A typical system can add an additional £4,000-£6,000 onto your initial investment. A solar battery system can save you a considerable amount on your energy bills.
Are Solar Batteries Worth It?
For many homeowners in Essex, Kent, London and the wider South East, the answer is an overwhelming yes. While a solar battery does require a considerable upfront investment, many homeowners see long-term savings that outweigh the costs.
A solar batters lets you:
- Reduce your electricity bills by storing and using more of your own free electricity generated by your solar panels.
- Use more clean energy, cutting your carbon footprint further.
- Protect against rising and volatile energy prices.
- Save additionally by charging your solar battery on cheaper time-of-day tariffs.
How Long Do Solar Batteries Last?
Most solar batteries have a lifespan of 10-12 years, depending on usage and brand. Always know what the warranty is before purchase to ensure you are covered for both performance and installation.
What Happens When My Solar Battery Is Full?
If your battery fills up and you don’t need to use it, there are several smart options:
- Export to the grid – earn money through SEG payments.
- Charge your EV – some batteries can divert excess energy to your car.
- Use smart tariffs – top up your battery with cheaper off-peak electricity at night.
- Use a solar diverter – having a solar diverter installed will use surplus energy to heat your hot water if you have an immersion heater installed.
Can I Use My EV as a Battery?
With bidirectional charging, your EV can be used as a battery. If your EV and charger support it, you car battery can supply power back to your home, giving your far more storage.
Installing Solar Battery Storage
Solar batteries can be installed in a garage, utility room or on an external wall. Installation must be carried out by an accredited installer. At SolarTherm UK, we follow current guidelines and provide expert installation of your solar PV system and battery storage, ensuring your system is tailored to your home’s needs and fitted to the highest standards.
Maximise Your Solar Savings with SolarTherm UK
Adding battery storage to your solar panels is one of the smartest ways to further reduce your energy bills and future-proof your home. Our specialists will help design the right system for your property and guide you through every step, from design, to installation to first class aftercare and support.
Start storing more of your own energy today and take back control of your home’s future. Contact SolarTherm UK for a free no obligation quote and design, tailored to your property, usage and future energy needs. No hard sell, just honest, expert advice.
Your home. Your energy. Your future.
