How Much Can Solar and Battery Storage Really Reduce Your Energy Bills?
With rising energy costs, more homeowners across Somerset are exploring solar panels and battery storage to reduce their electricity bills and reliance on the grid.
You may have seen headlines promising dramatic savings, but the reality is more nuanced, and more interesting.
In the right setup, solar and battery storage can reduce electricity bills by more than 80% for some households. However, the exact savings depend on a range of factors, including system design, household usage and energy tariffs.
In this guide, we explain what’s realistic, how the technology works, and how to approach solar and battery storage in a way that delivers genuine long-term value.
How Solar Panels Reduce Energy Bills
Solar panels generate electricity from daylight, allowing you to power your home using your own energy rather than buying it from the grid.
The more solar electricity you use in your home, the less you pay your energy supplier. Any surplus energy can be exported to the grid under the Smart Export Guarantee (SEG), providing an additional income stream.
However, solar generation and household usage don’t always line up. Many homes use more electricity in the evening, when solar panels are no longer producing power.
How Battery Storage Changes the Equation
Battery storage allows you to store excess solar energy generated during the day and use it later, when your home needs it most.
A well-designed battery system can:
- Increase self-consumption of solar energy
- Reduce reliance on peak-price grid electricity
- Support homes during power cuts (depending on configuration)
- Optimise energy use with smart tariffs and automation
When combined with solar, battery storage can significantly reduce grid electricity purchases, which is where the biggest savings come from.
When 80%+ Energy Bill Reductions Are Possible
Savings of more than 80% are achievable for some households, particularly when:
- The solar and battery system is correctly sized for the home
- Smart tariffs are used to charge batteries at low-cost times
- Energy use is shifted to cheaper or solar-rich periods
- Automation tools optimise charging, discharging and exporting
- The household has relatively high electricity usage
These results are highly individual. Two similar homes can see very different outcomes depending on how energy is used and how the system is configured.
Realistic Expectations for Most Homes
For many households, solar and battery storage can reduce electricity bills substantially.
Typical outcomes might include:
- A significant reduction in daytime grid electricity use
- Lower evening and overnight costs through stored energy
- Additional savings through export payments
- Improved resilience during outages
The goal is not perfection, but a meaningful reduction in energy costs and long-term protection against rising prices.
Tesla Powerwall 3 Rebate: A Current Opportunity
Tesla is currently offering a limited-time reimbursement on its Powerwall 3 battery system. Eligible customers can receive £375 per Powerwall 3 or Powerwall 3 Expansion unit, up to £750 in total, issued as a Virtual Visa reward card after installation and approval.
The offer applies to systems ordered and registered within Tesla’s defined window, with installation completed by the end of May 2026.
We’ve written a detailed guide explaining how the rebate works, eligibility criteria and deadlines:
👉 Tesla Powerwall 3 £750 rebate explained for Somerset homeowners
As with any promotion, we recommend viewing this as a bonus rather than the main reason to invest in battery storage.
Is Solar and Battery Storage Right for Your Home?
There is no one-size-fits-all answer. The right system depends on:
- Roof space and orientation
- Household electricity usage patterns
- Budget and long-term goals
- Whether backup power is required
- Tariffs and export options
At Sunlit Solar, we design every system around the property and the people living in it, not around a product brochure or headline savings figure.
Our Approach at Sunlit Solar
We believe solar and battery storage should be:
- Bespoke, not off-the-shelf
- Designed for long-term performance
- Explained clearly, without hype
- Installed and supported by an experienced local team
Whether you’re exploring solar, battery storage or both, we’re always happy to provide straightforward advice and a tailored system design.
In Summary
Solar panels and battery storage can dramatically reduce electricity bills, and in the right setup, savings of more than 80% are achievable for some households.
The key is careful system design, realistic expectations and choosing technology that matches your home and energy use.
If you’re considering solar or battery storage in Somerset, we’re here to help you understand your options and make an informed decision.
Phone: 01458 834 936
Email: info@sunlit-solar.co.uk
Website: www.sunlit-solar.co.uk
