Customer battery storage questions
Solar Battery Storage Questions & Answers – Complete UK FAQ
Introduction
Thinking about installing a solar battery but not sure where to start.
Battery storage has become one of the most popular upgrades for UK homeowners looking to reduce electricity bills, make better use of their solar panels and become less reliant on the National Grid. However, choosing the right battery system often raises a lot of questions.
At Dragons Breath Solar, we’ve supplied solar equipment throughout the UK for over 20 years. Although we don’t install systems ourselves, we’re happy to help customers choose compatible battery storage systems, inverters and solar equipment for domestic, commercial and off-grid projects.
This guide answers the most common battery storage questions we’re asked and explains how battery storage works, what size battery you may need and whether it’s suitable for your property.
Contents
- Will a Battery Storage System Run My House
- Can I Add Battery Storage to an Existing Solar PV System
- Can I Keep My Existing Inverter
- What Is a Hybrid Inverter
- Which Battery Technology Is Best
- What Size Battery Do I Need
- Can I Expand My Battery System Later
- Will Battery Storage Affect My Feed-in Tariff
- Can I Install Batteries in the Loft
- Do Solar Batteries Work During a Power Cut
- Can I Charge Batteries from the Grid
- How Long Do Solar Batteries Last
- Can I Go Completely Off-Grid
- Are Solar Batteries Worth the Investment
- Frequently Asked Questions
Will a Battery Storage System Run My House
A battery storage system can power some or all of your home depending on its capacity, your electricity usage and the appliances being used.
Most domestic batteries store excess electricity generated by your solar panels during daylight hours. That stored electricity can then be used during the evening when solar generation has stopped.
The length of time a battery will power your home depends on:
- Battery capacity (kWh)
- Daily electricity consumption
- Number of appliances running
- Time of year
- Solar panel output
Many homeowners use battery storage to reduce electricity bills rather than operate entirely from battery power.
Read our Solar Battery Storage – Complete Guide.
Can I Add Battery Storage to an Existing Solar PV System
In many cases, yes. Thousands of solar PV systems installed before battery storage became popular can now be upgraded.
The best solution depends upon:
- Age of your inverter
- Existing solar array
- Available roof generation
- Future expansion plans
Some systems can continue using the existing inverter, while others benefit from replacing it with a hybrid inverter.
Read our How Solar PV Systems Work.
Can I Keep My Existing Inverter
Possibly. Older solar inverters were not designed to manage battery storage.
If your inverter is relatively new it may already support batteries, while older systems may require either:
- AC-coupled battery storage
- Hybrid inverter replacement
Choosing the correct solution depends upon the existing installation.
Read our Solar Inverters – Complete UK Guide.
What Is a Hybrid Inverter
A hybrid inverter combines the functions of a solar inverter and battery charger into one unit.
Benefits include:
- Simpler installation
- Improved efficiency
- Future expansion
- Better battery management
- One integrated control system
Many homeowners upgrading older systems choose a hybrid inverter when replacing ageing equipment. Hybrid inverters are particularly popular for new solar installations because they make adding battery storage simpler both now and in the future.
Which Battery Technology Is Best
Lithium batteries have become the preferred choice for modern solar installations.
Benefits include:
- Longer lifespan
- Faster charging
- Higher efficiency
- Greater usable capacity
- Minimal maintenance
They generally outperform older lead-acid batteries in almost every application.
Browse our Solar Batteries.
What Size Battery Do I Need
Battery size depends on how much electricity your household uses.
Factors include:
- Daily electricity usage
- Solar panel output
- Evening electricity demand
- Future electric vehicle charging
- Heat pumps
- Budget
A battery that is too small may discharge quickly, while an oversized battery may never be fully utilised.
Can I Expand My Battery System Later
Usually yes. Many modern battery systems are modular, allowing additional battery capacity to be added as your energy requirements increase.
Always check expansion limits before purchasing.
Will Battery Storage Affect My Feed-in Tariff
Adding battery storage doesn’t usually affect the amount of electricity your solar panels generate. However, depending on your Feed-in Tariff (FIT) agreement and system configuration, it’s sensible to check the terms of your tariff before making changes. If you’re unsure, contact your tariff provider before modifying your system.
Can I Install Batteries in the Loft
SSometimes, but it isn’t usually the preferred location. Lofts can only be suitable provided:
- Temperature limits remain within the manufacturer’s recommendations.
- Good ventilation is available.
- Access for maintenance is adequate.
- The floor is structurally suitable.
Many batteries are instead installed in garages or utility rooms where temperatures are more stable.
Do Solar Batteries Work During a Power Cut
Not always. Most standard battery systems automatically shut down during a power outage to protect engineers working on the electricity network.
Some systems include backup power or emergency power supply (EPS) functionality that can continue powering selected circuits during an outage.
Can I Charge Batteries from the Grid
Yes. Many modern battery systems allow charging from cheaper overnight electricity tariffs.
This enables homeowners to:
- Purchase electricity at lower rates.
- Store energy overnight.
- Use that electricity during peak-rate periods.
How Long Do Solar Batteries Last
Most quality lithium batteries are designed to last between 10 and 15 years, with many rated for several thousand charge and discharge cycles.
The lifespan of a solar battery depends on several factors, including:
- Number of charge cycles
- Operating temperature
- Charging and discharging habits
- Battery quality and manufacturer
Most manufacturers provide long-term warranties.
Can I Go Completely Off-Grid
Yes—but only if your system is designed specifically for off-grid living.
An off-grid system usually requires:
- Larger battery capacity
- Additional solar panels
- Suitable inverter
- Backup charging provision
Most domestic battery systems remain connected to the National Grid.
Read our Off-Grid Solar Systems – Complete UK Guide.
Are Solar Batteries Worth the Investment
For many households, yes. Battery storage allows more of your own solar electricity to be used rather than exported back to the grid.
Benefits include:
- Lower electricity bills
- Increased energy independence
- Better use of solar generation
- Reduced reliance on rising electricity prices
The financial return depends on electricity usage, battery size and energy tariffs.
Frequently Asked Questions
Can I install battery storage without solar panels
Yes. Many battery systems can be charged directly from the electricity grid using time-of-use tariffs.
Are lithium batteries better than lead-acid
For most domestic solar installations, lithium batteries offer higher efficiency, longer life and lower maintenance requirements.
Can I monitor my battery on my phone
Most modern battery systems include smartphone apps that allow you to monitor charging, discharging and energy usage in real time.
Do batteries need maintenance
Most lithium battery systems require very little routine maintenance, although periodic inspections are recommended.
Can I Charge an Electric Vehicle Using Battery Storage
Yes, many homeowners use battery storage alongside an electric vehicle charger. Depending on the system design, stored solar energy can be used to charge an EV, reducing reliance on electricity from the grid. The best solution depends on your battery capacity, charging habits and overall energy usage.
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 focus on supplying reliable products together with friendly technical advice to help customers choose compatible equipment for their projects. While we don’t provide installation services, we’re always happy to help you select the right products for your system.
We supply:
Although we don’t provide installation services, we’re always happy to help customers choose compatible equipment for their projects.
Continue Reading
If you’re researching battery storage, these guides may also help:
- Solar Battery Storage – Complete Guide – Everything you need to know about battery storage.
- How Solar PV Systems Work – Understand how solar panels, inverters and batteries work together.
- Off-Grid Solar Systems – The Complete UK Guide – Learn how off-grid systems are designed.
- Solar Inverters – Complete UK Guide – Understand the role of inverters in solar PV systems.
- DIY Solar Panel Mounting – Complete UK Guide – Planning your own solar installation.
- Solar Energy Guides – Browse our complete solar knowledge base.
Need Help Choosing a Battery Storage System
Whether you’re upgrading an existing solar PV system or installing battery storage for the first time, Dragons Breath Solar supplies high-quality solar batteries, hybrid inverters and complete energy storage solutions throughout the UK. If you’re unsure which products are suitable for your installation, our experienced team is happy to help you choose compatible equipment.
