Can I Keep My FIT Payments If I Add Batteries?
Many homeowners who receive Feed-in Tariff (FIT) payments eventually consider adding battery storage to their existing solar panel system.
One of the first questions they ask is:
"Will I lose my FIT payments?"
In most cases, adding battery storage does not automatically mean you lose your FIT payments. However, there are important rules surrounding system design, metering and charging arrangements that should be considered before any upgrades are carried out.
This guide explains how battery storage can affect existing FIT installations and why professional advice is important.
What Is the Feed-in Tariff (FIT)?
The Feed-in Tariff was a UK Government scheme introduced to encourage the adoption of renewable electricity generation.
Although the scheme closed to new applicants in 2019, many homeowners continue to receive FIT payments today.
Depending on when the system was installed, FIT payments may include:
- Generation payments
- Export payments
- Or both
The exact arrangements depend on the original FIT registration.
Can I Add Battery Storage to My Existing Solar System?
Yes.
In many cases, battery storage can be added to an existing solar PV system without affecting your ability to continue generating electricity.
However, the installation must be designed correctly to ensure compliance with the relevant standards and to avoid compromising existing FIT arrangements.
Compatibility will depend on factors such as:
- Existing inverter
- Existing generation meter
- Electrical installation
- Battery technology
- Connection method
Will I Lose My FIT Payments?
Not necessarily.
Adding a battery does not automatically remove your entitlement to FIT payments.
However, the system must continue to comply with the applicable FIT rules and metering requirements.
Where changes are made to the system, it is important to understand how the battery interacts with the existing generation equipment and whether any additional metering or configuration is required.
Why Metering Matters
For many FIT systems, the generation meter records all electricity generated by the solar panels.
This allows the FIT Licensee to calculate generation payments.
Battery storage should be installed in a way that maintains the integrity of generation measurements.
Depending on the battery configuration, different metering arrangements may be appropriate.
Professional installers should always assess the existing metering before carrying out any modifications.
Can I Charge My Battery From the Grid?
Many modern battery systems allow charging from both:
- Solar panels
- The electricity grid
Whether grid charging is appropriate for an existing FIT installation depends on the original system configuration, the battery design and the applicable FIT requirements.
These considerations should always be discussed before installation.
Hybrid Inverters and Existing FIT Systems
Some homeowners replace their original inverter with a hybrid inverter when adding battery storage.
This can provide a neat, integrated solution but may require changes to the electrical installation and system monitoring.
The suitability of replacing an existing inverter depends on:
- Existing equipment
- System age
- FIT arrangements
- Future expansion plans
Each installation should be assessed individually.
Do I Need to Tell Anyone?
If modifications are made to your solar PV installation, you may need to notify relevant organisations depending on the nature of the changes.
This could include:
- Your Distribution Network Operator (DNO)
- Your FIT Licensee
- Your insurer
The requirements will depend on the scope of the work being undertaken.
Can I Expand My Solar System?
Adding battery storage is different from increasing the size of your solar array.
Expanding an existing FIT system may have implications that differ from simply installing a battery.
Professional advice should always be sought before increasing generating capacity, particularly where existing FIT payments are involved.
Why Professional Advice Is Important
Every FIT installation is different.
Factors such as:
- Installation date
- Original FIT terms
- Metering arrangement
- Existing inverter
- Proposed battery system
- Future expansion
can all influence the most appropriate upgrade path.
An assessment before installation helps ensure the upgraded system continues to operate efficiently while maintaining compliance with the relevant requirements.
How Zero Carbon Assesses Existing FIT Systems
Zero Carbon regularly upgrades existing solar installations by adding battery storage.
Before making recommendations, we assess:
- Existing generation meter
- Current inverter
- Electrical installation
- Proposed battery configuration
- DNO requirements
- Future expansion plans
This engineering-led approach helps homeowners upgrade older systems while considering the practical implications of their existing FIT arrangements.
Frequently Asked Questions
Can I add a battery to my existing FIT system?
In many cases, yes. Existing solar installations can often be upgraded with battery storage following an assessment of the current system.
Will I automatically lose my FIT payments?
No. Adding battery storage does not automatically end your FIT payments, although the installation should be designed with the existing FIT arrangements in mind.
Can I replace my inverter with a hybrid inverter?
Often, yes. Whether this is appropriate depends on your existing installation and future plans.
Can I still export electricity?
Yes. Many upgraded systems continue to export surplus electricity, although export arrangements may differ depending on your tariff and system configuration.
Should my existing system be inspected first?
Yes. Existing FIT systems should always be assessed before battery storage is added to ensure compatibility and appropriate system design.
Thinking About Upgrading Your Existing Solar System?
If your home already benefits from the Feed-in Tariff, battery storage could help you make better use of the electricity your solar panels generate.
Zero Carbon provides professional assessments for existing solar installations across Scotland, helping homeowners integrate battery storage while considering their existing FIT arrangements and future energy goals.
Contact our team today to discuss upgrading your existing solar PV system.
