Battery Storage UK – Store Your Solar Energy for Evening Use
Battery storage systems help UK homes store surplus solar energy for later use, improving efficiency, lowering electricity costs, and reducing reliance on the grid — making every unit of solar power count.
Why Add Battery Storage to Your Solar System?
If you already have solar panels — or are planning to install them — adding battery storage allows you to store the excess electricity generated during the day for use in the evening when solar generation stops. Without a battery, that surplus energy is exported to the grid at a lower rate. With one, you use more of the electricity you generate yourself.
Typical homes use only 30–50% of the solar electricity they generate. The rest is exported to the grid — often at rates far below what you pay to import.
A well-sized battery raises self-consumption to 70–90%. You use more of your own electricity and buy significantly less from the grid.
02 — Key Benefits
Benefits of Battery Storage
Battery storage helps homeowners maximise solar energy use, reduce electricity bills, and gain greater independence from the grid.
Increase self-consumption from 30–50% to 70–90% — so your solar investment works harder.
Save £300–£600 per year on top of your existing solar savings by buying less from the grid.
Reduce your reliance on the national electricity grid and protect yourself against rising energy prices.
Backup-ready batteries keep essential appliances running during a power cut (requires a backup-capable unit).
Charge your battery from the grid at cheap overnight rates (e.g. 7.5p/kWh) and use it during expensive peak periods.
Maximise your use of clean renewable energy and reduce the carbon footprint of your household.
How Does Battery Storage Work?
Battery storage operates automatically throughout the day — charging when your solar panels produce more electricity than your home needs, then supplying power when generation stops. Some batteries also support overnight grid charging at cheap off-peak rates.
Solar panels generate electricity. Your home uses what it needs instantly. Excess electricity automatically charges the battery rather than being exported to the grid at a lower rate.
When solar generation stops, your home automatically draws electricity from the battery — avoiding expensive grid electricity until the battery is depleted.
If you have a time-of-use tariff (e.g. Octopus Intelligent Go at 7.5p/kWh overnight), you can charge your battery from the grid at cheap off-peak rates and use that stored electricity during peak periods at 30p/kWh — saving up to £600/yr.
Types of Battery Storage Systems
Battery storage systems connect to your solar setup in two ways — AC-coupled or DC-coupled — each suited to different situations. The right choice depends on whether you already have solar panels or are installing everything together.
| Type | Connection | Best For | Efficiency | Typical Cost (5kWh) |
|---|---|---|---|---|
| AC-Coupled BatteryRetrofit | After solar inverter (AC side) | Existing solar systems | 90–95% | £4,000 – £6,000 |
| DC-Coupled BatteryNew Install | Before inverter (DC side) | New solar installations | 95–98% | £4,000 – £5,500 |
AC-coupled systems can be added to any existing solar installation. DC-coupled systems are slightly more efficient and are typically installed alongside new solar panels. LAMTANS designs the right system for your setup at the free survey.
05 — CostsBattery Storage Costs in UK 2026
Battery storage systems typically cost between £2,500 and £10,000 depending on capacity. A larger battery stores more energy and delivers better long-term savings — the right size depends on your energy usage and solar system output.
Small homes, lower electricity usage
Save £150–£250/yrTypical 3-bed semi — most popular size
Save £300–£500/yrHigher usage, electric vehicle charging
Save £450–£700/yrLarge homes, off-grid aspiration
Save £550–£800/yrBattery Storage Installation Process
Our battery storage installation is fully managed from consultation to handover. We handle system design, MCS-standard paperwork, installation, testing, and certification — so you have one point of contact throughout.
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1Free Consultation
We discuss your energy usage, solar output, and goals to identify the right battery size and system type for your home.
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2Site Survey
We visit to check the available space for the battery unit and assess your existing electrical installation and inverter compatibility.
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3System Design
We determine whether AC-coupled or DC-coupled integration is best for your setup and specify the optimum battery model and capacity.
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4Fixed-Price Quote
We provide a detailed, fixed-price quotation with no hidden charges. No obligation to proceed.
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5Installation
Our engineers install and integrate the battery storage system, typically completed within a single working day.
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6Commissioning & Monitoring Setup
We test the system fully, confirm correct operation, and walk you through the monitoring app so you can track your battery performance and savings.
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7Handover & Certification
We provide all installation documentation and certification, leaving you with complete records for your property and any future sale.
A typical battery storage installation is completed in a single day. Larger or more complex systems may take slightly longer — confirmed at your free survey.
Time-of-Use Tariffs for Battery Storage
If you have a time-of-use electricity tariff, you can charge your battery from the grid overnight at cheap off-peak rates — then use that stored electricity during expensive peak hours. This works with or without solar panels and can add £300–£600 per year in additional savings.
| Tariff | Overnight Rate | Peak Rate | Typical Annual Saving |
|---|---|---|---|
| Octopus Intelligent Go | 7.5p/kWh | 30p/kWh | £400 – £600/yr |
| Octopus Go | 9p/kWh | 30p/kWh | £350 – £500/yr |
| EON Next Drive | 9.5p/kWh | 30p/kWh | £300 – £450/yr |
Tariff rates and savings are indicative estimates. Actual rates change over time — check with your energy supplier for current pricing. Annual saving figures assume a 5kWh battery with regular overnight charging.
Not sure which tariff is right for your setup? We advise on the best time-of-use tariff for your battery and usage pattern during the free survey — helping you maximise savings from day one.
Why Choose LAMTANS for Battery Storage?
We follow MCS installation standards proactively across all battery storage and renewable energy work — ensuring your system is designed and installed to the highest recognised UK benchmarks.
Whether you have an existing solar system or are starting fresh, we design and install both AC-coupled and DC-coupled systems — the right choice for your setup.
We help you choose the best tariff for your battery and usage pattern during the free survey — maximising your savings from the day your system goes live.
No-obligation assessment for your property, followed by a detailed fixed-price quote — no surprises added after work begins.
Based in Manchester, we serve homes across the UK. A local team, a national reach, and a single point of contact from survey to handover.
Experienced engineers delivering safe, efficient, correctly sized battery systems — from first consultation to certified handover.
LAMTANS Engineering is a Manchester-based specialist delivering battery storage, solar panels, insulation, and heating upgrades across the UK. We combine industry accreditations with genuine renewable energy expertise to deliver correctly designed systems — from free survey to final sign-off.
Frequently Asked Questions
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How much does battery storage cost? +
Battery storage costs depend on capacity: 3kWh systems typically cost £2,500–£3,500; 5kWh (the most popular size for a 3-bed home) cost £4,000–£5,500; 8kWh systems cost £6,000–£8,000; and 10kWh systems cost £7,500–£10,000. All prices include installation. Battery storage is zero-rated for VAT (0%).
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Is battery storage worth it? +
For most homes with solar panels, yes. A battery raises your solar self-consumption from 30–50% to 70–90%, adds £300–£600 per year in additional savings, and typically pays back within 5–8 years. The 10–12 year warranty means you come out well ahead over the battery's lifetime.
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How long does a battery last? +
Most home battery storage systems carry a 10–12 year manufacturer warranty. After that period, the battery will have degraded slightly in capacity but will typically continue to function. The warranty period alone exceeds the payback period for most installations, meaning you will be in profit before the warranty expires.
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Can I add a battery to my existing solar panels? +
Yes. We install AC-coupled battery systems that work with any existing solar installation, regardless of the age or brand of your current inverter. AC coupling is slightly less efficient than DC coupling (90–95% vs 95–98%), but is the standard and cost-effective retrofit solution for existing solar customers.
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Can a battery power my home during a power cut? +
Only if you choose a battery with backup capability. Standard battery storage systems shut down automatically during a grid power cut for safety reasons. Backup-ready batteries (sometimes called islanding or blackout-protection batteries) are available and can keep essential appliances running during an outage. We advise on backup options at the free survey.
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What accreditations does LAMTANS hold for battery storage? +
LAMTANS Engineering is TrustMark Registered, RECC Accredited, and PAS2035 aligned — along with a range of further industry accreditations. We are Fully Industry Accredited for the retrofit and renewable energy work we carry out. We follow MCS installation standards proactively across all battery storage and renewable energy installations. Our full accreditations list is available on our accreditations page.
Ready to Add Battery Storage?
Get your free, no-obligation battery storage survey today. Our engineers will assess your property, review your solar system or energy usage, and recommend the right battery size and system type for your home — followed by a fixed-price quote with no hidden charges. We aim to provide advice within 72 hours following your free survey.