Questions about battery storage
Understanding Solar Battery Storage – Common Questions Explained
Introduction
Solar battery storage has become one of the most popular ways for homeowners to make better use of the electricity generated by their solar panels. By storing surplus energy for later use, battery systems can help reduce electricity bills, increase energy independence and make your home more efficient.
However, every property is different. Some homeowners want to maximise the energy generated by their solar panels, while others are looking to take advantage of cheaper overnight electricity tariffs or prepare for future technologies such as electric vehicles and heat pumps.
At Dragons Breath Solar, we’ve supplied quality solar equipment throughout the UK for over 20 years. Although we don’t install systems ourselves, we’re always happy to help customers choose compatible products for their own installations.
This guide answers some of the most common questions about solar battery storage and explains how different systems can be used to meet a variety of energy requirements. Whether you’re looking to reduce electricity bills, increase your use of renewable energy or prepare your home for future technologies, understanding how battery storage works is the first step towards choosing the right solution.
Contents
- Why Install Solar Battery Storage
- Battery Storage with Existing Solar Panels
- Battery Storage for New Solar Installations
- Charging a Battery from the National Grid
- How Battery Storage Reduces Electricity Bills
- What Happens to Excess Solar Energy
- How Much Battery Storage Do I Need
- Battery Storage for Off-Grid Systems
- Hybrid Inverters Explained
- Frequently Asked Questions
Why Install Solar Battery Storage
Every homeowner has different reasons for installing battery storage.
Some want to reduce their electricity bills, while others want to become less dependent on the National Grid or make better use of the energy generated by their solar panels.
Common reasons include:
- Lower electricity costs
- Greater self-consumption of solar energy
- Increased energy independence
- Charging electric vehicles
- Preparing for future energy price increases
- Backup power during outages (where supported)
The right battery system depends entirely on your individual requirements.
Battery Storage with Existing Solar Panels
Many homeowners already have solar panels installed but don’t yet have battery storage.
In most cases, it is possible to add battery storage to an existing solar PV system, although the type of inverter currently installed will determine the most suitable solution.
Some systems can use an AC-coupled battery, while others may benefit from replacing the inverter with a modern hybrid inverter.
Adding battery storage allows excess electricity that would normally be exported to the National Grid to be stored for use later in the day.
Read our How Solar PV Systems Work.
Battery Storage for New Solar Installations
If you’re installing a new solar PV system, it’s often worth considering battery storage from the beginning.
Modern hybrid inverter systems are designed to manage both solar generation and battery charging automatically, providing an efficient and flexible solution for future expansion.
Installing battery storage at the same time as your solar panels can also simplify installation and reduce the need for future upgrades.
Charging a Battery from the National Grid
Battery storage isn’t only useful for homes with solar panels. Many homeowners now install battery storage specifically to take advantage of off-peak electricity tariffs, even before installing solar panels. Charging a battery overnight at lower electricity rates and using that stored energy during peak periods can help reduce household energy costs.
Many modern battery systems can charge using cheaper overnight electricity tariffs, allowing stored electricity to be used during the day when energy prices are higher.
This can help reduce electricity costs and is particularly useful for households with:
- Electric vehicles
- Heat pumps
- High evening electricity usage
- Time-of-use electricity tariffs
Charging from the National Grid is managed automatically by the inverter, requiring no manual switching between energy sources.
How Battery Storage Reduces Electricity Bills
Without battery storage, unused electricity generated during the day is often exported back to the National Grid.
A battery stores this surplus energy so it can be used later when your home requires electricity.
This increases your self-consumption of renewable energy and reduces the amount of electricity you need to purchase from your energy supplier.
For many households, this results in lower electricity bills and better overall use of their solar investment.
What Happens to Excess Solar Energy
During sunny periods, solar panels often generate more electricity than your home is using.
Without battery storage, this surplus electricity is usually exported to the National Grid.
With battery storage installed, excess generation is stored for later use, allowing you to power your home during the evening, overnight or on cloudy days using your own renewable energy.
How Much Battery Storage Do I Need
The ideal battery size depends on several factors, including:
- Daily electricity consumption
- Size of your solar PV system
- Number of occupants
- Evening electricity usage
- Future plans for electric vehicles or heat pumps
Choosing the correct battery capacity helps maximise performance while avoiding unnecessary expense.
Read our Best Home Battery Storage Systems – The Complete UK Buyer’s Guide.
Battery Storage for Off-Grid Systems
Off-grid battery storage works differently from grid-connected systems.
Because there is no connection to the National Grid, the battery bank must store enough electricity to supply your property during periods of low solar generation.
Careful system design is essential, taking into account:
- Daily energy consumption
- Seasonal variations
- Solar panel capacity
- Battery storage capacity
- Backup generation where required
Our range of off-grid solar kits provides complete solutions for remote properties, workshops, holiday cabins and agricultural buildings.
Read our Off-Grid Solar Systems – The Complete UK Guide.
Hybrid Inverters Explained
A hybrid inverter combines the functions of a standard solar inverter with battery management.
It automatically directs electricity between:
- Solar panels
- Battery storage
- Household appliances
- The National Grid
Hybrid inverters simplify energy management and are often the preferred choice for new solar installations because they make battery integration straightforward and allow future expansion.
Frequently Asked Questions
Can I add battery storage to my existing solar panels
In most cases, yes. The best solution depends on your current inverter and system design.
Can I install battery storage without solar panels
Yes. Many battery systems can be charged using low-cost overnight electricity tariffs.
Will battery storage work during a power cut
Some systems offer backup power functionality, but not all battery installations automatically provide electricity during an outage.
Do batteries work during winter
Yes. Although solar generation is lower during winter months, battery storage still stores and supplies electricity whenever sufficient energy is available.
Can I charge my electric vehicle from battery storage
Yes. Many homeowners use battery storage alongside EV chargers to maximise the use of solar energy or cheaper overnight electricity.
Why Choose Dragons Breath Solar
For more than 20 years, Dragons Breath Solar has supplied quality solar equipment to homeowners, businesses and installers throughout the UK.
We supply:
Although we don’t provide installation services, we’re always happy to help customers choose compatible equipment for their own projects.
Continue Reading
If you’d like to learn more about solar battery storage, these guides may also be useful:
- Solar Battery Storage – Complete Guide – Learn how battery storage works and its key benefits.
- Solar Battery Storage Questions & Answers – The Complete UK FAQ – Answers to the most frequently asked customer questions.
- Best Home Battery Storage Systems – The Complete UK Buyer’s Guide – Compare features and choose the right battery for your home.
- How Solar PV Systems Work – Understand how solar panels, inverters and batteries work together.
- Off-Grid Solar Systems – The Complete UK Guide – Explore battery storage for off-grid living.
- Solar Energy Guides – Browse our complete collection of solar advice and buying guides.
Need Help Choosing the Right Battery Storage System
Whether you’re adding battery storage to an existing solar PV system or planning a completely new installation, Dragons Breath Solar supplies quality batteries, hybrid inverters and complete energy storage solutions throughout the UK. If you’re unsure which products are right for your project, our experienced team is always happy to offer friendly technical advice and help you choose compatible equipment. Our aim is to help you invest in a battery storage system that delivers reliable performance, excellent value and many years of dependable service.
