Why Battery Storage Makes Solar Work Harder
Solar panels generate most of their electricity between 10am and 3pm - exactly when most households use the least energy. Without a battery, that surplus gets exported to the grid for a fraction of what you pay to buy it back in the evening.
A home battery stores your excess solar energy so you can use it when you actually need it. For most households, that means running your heating, cooking, and lighting from stored solar power rather than paying peak electricity rates.
How Much Could You Save?
The average UK household with solar panels exports around 50% of the electricity they generate. With battery storage, you can use up to 80% of your solar energy yourself.
In real terms, that means:
- Without battery: Save around £400-500 per year on electricity
- With battery: Save around £700-900 per year on electricity
- Additional savings: Avoid peak-rate electricity costs in the evening
Most home batteries pay for themselves within 6-8 years, and they last 10-15 years with minimal maintenance.
What Size Battery Do You Need?
For a typical three-bedroom home, a 5-10 kWh battery is usually the right fit. Here's a rough guide:
- Small household (1-2 people): 3-5 kWh
- Medium household (3-4 people): 5-8 kWh
- Large household (5+ people): 8-13 kWh
Your installer should size the battery based on your solar panel output and your actual energy usage patterns, not just the number of bedrooms.
Can You Go Off-Grid?
In theory, yes - but in practice, most UK homes stay connected to the grid. Battery storage is about reducing your reliance on the grid, not eliminating it entirely. During winter months, shorter days mean less solar generation, so having grid access as a backup makes sense.
That said, a well-sized solar and battery system can cover 70-80% of your annual electricity needs, which is a significant reduction in both bills and carbon emissions.
Getting Started
If you already have solar panels, adding a battery is straightforward and usually takes half a day to install. If you're considering solar for the first time, it's worth planning for battery storage from the start - it's cheaper to install everything together.
Contact us for a free survey and we'll assess your home's suitability for solar battery storage. We'll give you honest advice on the right system size and expected savings based on your actual usage.