A home battery transforms the value of solar panels by storing surplus energy for evening use. Here is why more homeowners across the West Midlands are making the switch.
If you already have solar panels — or you are thinking about installing them — adding battery storage is one of the most effective ways to maximise your investment. Without a battery, much of the electricity your panels generate during the day is exported to the grid at a low rate. With a battery, you store that energy and use it yourself when you need it most.
Solar panels produce the most electricity in the middle of the day — between roughly 10am and 3pm. For many Birmingham households, this is when energy demand is lowest because people are at work or school. The result is a mismatch: your panels are generating the most power precisely when you are using the least.
Without a battery, the surplus is exported to the grid. Under the Smart Export Guarantee, you receive a payment for this exported electricity — but the rate is typically around 4 to 6 pence per kWh. When you then buy electricity back from the grid in the evening, you pay the full retail rate — currently around 24 to 30 pence per kWh. This gap between export and import prices is where a battery pays for itself.
A home battery captures the surplus solar electricity that would otherwise be exported and stores it until the evening. When your household demand increases — cooking, lighting, hot water, television, charging devices — the battery discharges its stored energy into your home instead of you drawing from the grid.
The financial benefit is straightforward: every kWh you use from your battery instead of buying from the grid saves you the difference between the retail electricity rate and what you would have earned by exporting. At current prices, that saving is roughly 20 to 25 pence per kWh.
Without a battery, a typical household uses 30 to 50 per cent of its solar generation directly. With a battery, this jumps to 70 to 90 per cent or more. The more of your own electricity you use, the less you buy from the grid and the faster your solar investment pays for itself.
The most expensive electricity is used between 4pm and 9pm — peak time. This is exactly when a battery discharges stored solar energy, displacing the most costly grid electricity.
Once your solar panels and battery are installed, your stored electricity is free. As grid electricity prices increase over the coming years, the value of your self-generated and stored energy increases too. You are effectively locking in a portion of your electricity supply at today's installation cost rather than tomorrow's retail rate.
Some electricity tariffs offer cheaper rates during off-peak hours, typically overnight. A battery can charge from the grid during these cheap periods and discharge during expensive peak periods, saving you money even on days with limited solar generation. This works with or without solar panels.
With solar panels and a battery, you become less dependent on your energy supplier and the wholesale energy market. While you will still draw some electricity from the grid (particularly in winter), your overall consumption drops substantially.
Some battery systems can provide backup power during grid outages, keeping essential appliances running. Not all systems offer this feature — it depends on the battery model and how it is configured. We can advise on backup-capable systems during your home assessment.
By using more of your own solar electricity and buying less from the grid, you reduce your household's carbon footprint further. Grid electricity in the UK still relies partly on gas-fired generation, particularly during peak evening hours. Solar energy stored in your battery displaces some of that fossil fuel generation.
You do not need to install new solar panels to benefit from a battery. If you already have a solar PV system, a battery can usually be retrofitted. We assess your existing inverter and wiring to determine the best battery option and whether any modifications are needed. Many homeowners in Birmingham who installed solar panels in previous years are now adding batteries to capture the surplus energy they have been exporting.
The right battery size depends on how much surplus solar energy you generate and when you use the most electricity. As a rough guide for homes in the West Midlands:
We size every battery individually based on your actual energy data during the home assessment.
Battery costs have fallen significantly in recent years as the technology has matured. A typical 5 to 10kWh home battery costs between £3,000 and £6,000 installed. 0% VAT may apply to eligible residential battery storage installations, whether installed with new solar panels or added to an existing system. This can reduce the total cost meaningfully. We confirm VAT eligibility during your quote.
Combining a battery with a heat pump and solar PV creates a comprehensive home energy system. Your panels generate electricity, the battery stores the surplus, and the heat pump uses stored energy to heat your home. This combination delivers the greatest overall savings and the lowest carbon footprint achievable from a domestic energy system.
In most cases, yes. We assess your existing system and recommend the best compatible battery. Some older inverters may need upgrading, but we include this in the quote if needed.
Most home batteries have 10 to 15-year warranties. They typically continue working beyond the warranty period with gradual capacity reduction — similar to how a phone battery ages but over a much longer timeframe.
If you are on a time-of-use tariff with cheap overnight rates, a battery can save money by charging cheaply and discharging during peak hours. However, the strongest financial case is when paired with solar PV.
Get a free quote for battery storage — with or without new solar panels.
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