Battery Storage Installation
in Milton Keynes
Store the solar energy you generate during the day and use it in the evening. Typically lifts self-consumption from around 40% to between 62% and 86%, depending on the size of the battery.
Home Battery Storage — Maximise Your Solar
Without storage, most households only use 25–35% of the solar electricity they generate. The rest is exported to the grid, usually at a lower price than you import at. A home battery changes that completely — storing excess generation and releasing it when you need it.
We install and commission battery systems compatible with new and existing solar installations. Whether you're adding storage to existing panels or starting fresh with a combined solar and battery system, we'll size the battery correctly for your usage.
- Compatible with existing solar systems — retrofit or new install
- Brands: Sigenergy, Fox, ECOFlow and more
- Standalone installation available without solar — see our battery storage without solar page
- Smart tariff integration — charge from the grid on cheap-rate overnight tariffs
- Monitoring app — see exactly what your system is generating, storing and using
Typical Battery System
Based on a 4kWp solar system. Figures are estimates — your free survey will give exact numbers.
Calculate My SystemA battery pairs well with a heat pump, which runs on electricity all winter. See air source heat pump installation.
The Difference Storage Makes
Use more of what you generate
Without storage, most of your midday solar generation exports to the grid at around 7p/kWh. With storage, you use that energy yourself at peak times — worth 24–26.32p/kWh instead.
Energy security
A battery gives you a buffer against grid power cuts and rising energy prices. With a backup gateway fitted, the battery can power the whole home during a power cut. Without one, it shuts down when the grid goes off, as it is required to. We do not wire selected circuits.
Charge on cheap-rate tariffs
Smart batteries can charge from the grid overnight on cheap-rate tariffs (e.g. Octopus Go at ~7.5p/kWh) and discharge during expensive peak periods. No solar required for this benefit.
Faster payback on your solar
Adding storage to a solar installation reduces the payback period by 1–2 years by increasing the value of each unit generated. Combined solar and battery packages typically pay back in 7–10 years.
How Battery Installation Works
Assessment & Design
We assess your current solar system (or design a new one), your daily electricity usage patterns, and your grid tariff. We recommend the right battery capacity for your situation — not the biggest one we can sell you.
Installation
Battery installation is typically completed in a single day. We mount the unit (usually in a garage or utility room), connect it to your solar system or consumer unit, and commission it fully. The site is left clean and tidy.
Handover & Monitoring
We show you how to use the monitoring app so you can see your generation, storage, and usage in real time. We configure any smart tariff integrations and handle all documentation.
Battery Storage Costs in Milton Keynes (2026)
Indicative prices for standalone battery installation. Combined solar and battery packages are available — see our Solar + Battery Packages page.
| System | Capacity | Installed Cost | Additional Annual Saving |
|---|---|---|---|
| Fox ESS EP6 | 5.76 kWh | From £4,400 | £250–£400/yr |
| Fox ESS EP12 | 11.52 kWh | From £5,300 | £350–£550/yr |
| SigenStor BAT 6.0 | 5.84 kWh | From £5,400 | £400–£600/yr |
| SigenStor BAT 10.0 | 8.76 kWh | From £5,900 | £400–£650/yr |
Prices include supply, installation and commissioning. Additional saving calculated against a 4kWp solar system. Your survey will give exact figures.
Battery Storage FAQs
A home battery system in Milton Keynes typically costs from £4,400 installed depending on capacity (5.8–17kWh). When combined with a new solar installation, you often get a better overall price than standalone battery installation.
A home battery increases solar self-consumption from around 25–35% (without storage) to 60–75%. For a typical 4kWp system generating 3,600 kWh/year, this can mean an additional £350–£500/year in savings on top of what you already save from solar alone.
Yes — we can retrofit battery storage to most existing solar installations. We'll assess your current inverter and advise whether a hybrid inverter upgrade is needed or whether an AC-coupled battery system would work better. Both options are available.
We install Sigenergy, Fox ESS, ECOFlow, Tesla Powerwall, and other quality battery systems. The right choice depends on your existing setup, required capacity, and budget. We'll recommend the best option during your free survey.
Battery Brands We Install
We install a range of leading battery systems. Explore our detailed guide to the Tesla Powerwall:
Tesla Powerwall Installation →Related Reading
AC Coupled vs DC Coupled Battery Storage — Which Is Right for You? →
Retrofitting storage to existing solar panels? Understanding the difference could save you money.
Read more on this
- the January 2027 energy price cap forecast, and what to do before it's confirmed
- how home battery storage works, and what it costs
- best solar batteries in the UK compared
- add a battery to existing solar
- battery storage without solar — our standalone service
- fitting a battery without solar panels
- how solar and batteries affect your EPC rating
- AC-coupled vs DC-coupled batteries
- our Fox ESS battery review
- the SigenStor reviewed
- what a Tesla Powerwall 3 actually costs installed
- our Powerwall 3 review
- adding a battery to a new build
- adding storage at Eastbrook Village
- EV tariffs, solar and battery — how they actually fit together
Get a Free Battery Storage Quote in Milton Keynes
We'll assess your existing solar setup (or design a new combined system), recommend the right battery capacity, and give you a fixed-price quote with a full savings breakdown.
Or email info@depthoflight.co.uk | Send a message
Mon–Fri, 08:00–17:00 | 1 South House, Bond Avenue, Bletchley, Milton Keynes, MK1 1SW