What battery storage systems do you install?

We install leading brands including Tesla Powerwall and GivEnergy. We advise on the right capacity for your home based on consumption and generation profile.

Can I add battery storage to my existing solar panels?

Yes. We retrofit battery systems to most existing solar installations. We assess your inverter compatibility and DNO requirements before recommending a solution.

How much can I save with a home battery?

Savings depend on your tariff, generation and consumption. Most customers significantly reduce grid imports by storing daytime solar generation for evening use.

Home Battery Storage Systems London

Unlock Full Energy Independence

Solar panels generate energy during the day, but you often use it most at night. Battery storage bridges this gap. By installing a battery system (such as Tesla Powerwall or GivEnergy), you can store your excess solar generation to use in the evening, reducing your reliance on the grid to near zero. Even without solar, you can charge your batteries during cheap off-peak hours (like Octopus Go/Agile) and discharge them when electricity is expensive.

Benefits of Battery Storage

Home energy app showing solar import and export — battery discharge savings London MCS electricalworks

Smart Tariff Savings

Compatible with smart tariffs like Octopus Flux. Charge your battery at 7p/kWh overnight and use that cheap power during the day, saving hundreds per year.

Wall-mounted lithium home battery with isolators — backup power for London homes G98 compliant MCS

Blackout Protection

Keep your lights, Wi-Fi, and fridge running during a power cut. Our systems can be installed with EPS (Emergency Power Supply) for total peace of mind.

Retrofit AC-coupled battery beside existing solar — increased self-consumption London electricalworks

Retrofit Ready

Already have solar panels? No problem. We can "AC-Couple" a new battery system to your existing array without needing to replace your current inverter.

Battery Partners

Installation Gallery

Tesla Powerwall 2

Richmond, TW10

Myenergi Libbi modular battery system — expandable storage with solar diversion London MCS

MyEnergi AIO

Clapham, SW4

Solis hybrid inverter with battery port — DC-coupled storage option for London PV upgrades

Solis Home

Hampstead, NW3

Loft-mounted battery inverter system — space-saving install with fire detection London BS 7671

Loft Install

Ealing, W5

4 Steps to Energy Storage

Load Analysis

We analyze your daily energy profile to determine the perfect battery capacity (kWh) so you never run empty.

System Design

We choose between AC-coupled (retrofit) or DC-coupled (new solar) systems to maximize efficiency and compatibility.

Install & Setup

Our electricians install the unit, configure the gateway for backup power, and connect it to your Wi-Fi.

App & Optimization

We help you switch to a smart tariff (e.g. Octopus) and program the battery to charge when energy is cheapest.

Technical Specifications

AC vs DC Coupled Systems

DC-Coupled: Best for new solar installs. The battery charges directly from the panels before the inverter converts it to AC. Highly efficient.
AC-Coupled: Best for retrofits. It sits separately from your existing solar inverter. Flexible and works with any solar brand.

AC-coupled battery inverter schematic — retrofit battery on existing solar London MCS

DC-coupled battery with hybrid inverter — higher round-trip efficiency new solar London electricalworks

Sizing Your Battery (kWh)

A typical London home uses 8-10kWh per day. We recommend a battery that covers your evening usage (usually 5-10kWh). We install modular systems (like GivEnergy or Enphase) that allow you to add more capacity later if your needs change (e.g., buying an EV).

Modular battery stack expansion — scalable kWh for growing EV and heat pump loads London

Location & Fire Safety

Batteries prefer moderate temperatures (garage, utility room, or hallway). We strictly adhere to PAS 63100 fire safety regulations, ensuring fire detection is installed near the unit and adequate ventilation is provided to maintain warranty performance.

Battery installed in ventilated utility room — clearance and fire regulation compliance London

Heat and smoke detection near battery store — insurance and DNO best practice London install

Grid Trading & Smart Exports

Modern batteries are smart. We can set them up to export energy back to the grid during peak pricing hours (4pm-7pm), earning you money. This "Grid Trading" can significantly reduce your ROI time frame.

Agile import export grid trading screen — battery arbitrage with Octopus-class tariffs London

SMETS2 smart meter with CT clamps — accurate import export for battery control London MCS

What Our Customers Say

James O.

Wimbledon, London

★★★★★

"We added a Tesla Powerwall to our existing solar panels. The Electrical Works team handled the retrofitting perfectly. Now we run on stored sunshine almost every evening and hardly pay a penny to the grid."

Elena M.

Chiswick, W4

★★★★★

"With the Octopus Agile tariff and our new GivEnergy battery, we charge up at 3am for cheap and use that power all day. The installation was neat, and the app setup was explained clearly."

Battery Facts

Battery cycle life versus depth of discharge chart — warranty expectations London MCS customers

Lifespan & Warranty

Modern Lithium-Iron (LiFePO4) batteries are extremely durable. Most come with a 10-year warranty and are rated for over 6,000 cycles (roughly 15 years of daily use).

Hybrid inverter commissioning menu — battery charge limits and grid charge settings London

Power Output Matters

Capacity (kWh) is how much you store. Power (kW) is how fast you can use it. We ensure your battery has enough power to run your kettle and shower simultaneously.

Winter solar yield versus battery reserve — seasonal performance expectation London electricalworks

Winter Performance

Solar generation drops in winter, but your battery is still useful. We program it to force-charge from the grid during cheap off-peak hours to keep your bills low.

Battery FAQ

Can I install a battery without solar panels?

Yes! This is called "standalone storage." You can charge the battery from the grid when electricity is cheap (e.g., overnight) and use it when prices are high. It's a great way to save money if you can't have panels.

Will it power my whole house during a blackout?

It depends. Standard installs usually shut down during a cut for safety. However, if we install an EPS (Emergency Power Supply) switch or a Gateway (like Tesla), it can back up essential circuits or the whole home.

Where can the battery be installed?

Garages, utility rooms, or lofts are common. Some units (like Tesla Powerwall) are rated for outdoor use, but we recommend sheltered areas to maintain optimal temperature and performance.

What is the VAT on batteries?

Currently, in the UK, standalone battery storage installations enjoy 0% VAT, making them 20% cheaper than before. This applies whether you install them with solar or on their own.

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