Battery Storage Explained: How to Get More from Your Solar Setup
Maximising Your Solar Investment in 2025
Why Battery Storage Matters
If you're already generating your own clean energy with solar panels, adding a battery storage system could be the smartest next step. Why? Because without storage, much of the energy your panels generate during the day may go unused—especially when you're out and about. Battery storage captures that excess power so you can use it later, like in the evening when you’re home and energy demand is highest.
What Is a Solar Battery?
A solar battery is a device that stores electricity generated by your solar panels. Instead of exporting surplus energy back to the grid (often at low Smart Export Guarantee rates), a battery keeps that energy on-site for your own use—reducing your reliance on the grid and protecting you from rising electricity prices.
How Battery Storage Works
Here’s a simplified breakdown:
Daytime (Generation): Your panels generate electricity. Once your home’s immediate energy needs are met, any surplus is diverted to the battery.
Evening (Usage): When the sun goes down, your battery kicks in, powering your home with the stored energy.
Night (Grid Backup): If your battery runs out, you’ll fall back on grid energy as normal.
Smart battery systems can also be programmed to:
Charge during off-peak (cheaper) electricity hours.
Export to the grid when tariffs are most favourable.
Integrate with EV chargers or smart home systems.
Benefits of Adding a Battery
✅ Greater Energy Independence
You’ll use more of your own solar power, reducing reliance on your energy provider.
✅ Lower Energy Bills
By reducing how much electricity you buy, a battery can help pay for itself over time.
✅ Backup Power
Some batteries offer blackout protection, keeping your lights on during power cuts.
✅ Boosted ROI
With less energy wasted, you maximise the return on your solar investment.
Key Considerations Before Installing
Battery Size (kWh): Choose a capacity based on your home’s energy usage and solar output. Most UK homes benefit from 5–10kWh systems.
AC or DC Coupled: AC batteries can be retrofitted easily; DC systems tend to be more efficient but may require more integration work.
Warranties & Lifespan: Most batteries come with a 10-year warranty. Look for a product with high cycle life and efficiency ratings.
Location: Batteries can be wall-mounted or floor-standing—commonly stored in utility rooms, garages or weather-protected outdoor spaces.
Cost: Prices typically range from £3,000–£8,000 depending on capacity and brand. Grants or 0% VAT relief may apply (see below).
Are There Incentives in 2025?
Yes. As of 2025, solar battery installations still benefit from:
0% VAT on domestic energy-saving materials (including batteries when installed with solar). Valid until March 2027.
Smart Export Guarantee (SEG): Even if you store energy first, you can still sell unused power back to the grid.
Always check for local council grants, as availability can vary by region.
Is Battery Storage Right for You?
It depends on your energy use and goals. Battery storage is ideal for:
Homes with higher evening usage
EV owners who want to charge from solar
Areas prone to blackouts
Households keen to cut carbon and bills
For others, it may be more cost-effective to wait or invest in higher-efficiency panels first. A professional energy assessment can help you decide.
Final Thoughts
Battery storage is no longer just a “nice to have”—it’s fast becoming a key part of smart, sustainable home energy. Whether you want to cut your bills, gain energy independence or get the most from your solar panels, batteries offer a practical and future-proof solution.
Thinking about upgrading your solar setup?
Speak to Solar Synergy Solutions today for tailored advice and installation options.
Still weighing your options?
Our team can help you understand whether battery storage is right for your home.
Book a free consultation or call us today on 07779 996 116 to see what solar could do for you.