Self-consumption
Use the solar you generate when you need it. A home battery covers your evening demand, so you export less at low rates by day and import less at higher rates in the evening.
Tesla Powerwall installation,
by our own team.
Synergy Power is a Tesla Powerwall certified installer. We design and install Powerwall 3 home batteries with new or existing solar, set up backup at commissioning, and look after the system afterwards with our in-house UK team.
- TeslaPowerwall certified installer
- MCSCertified battery installer
- BackupGateway for whole-home or partial-load backup
- ToUBackup set up at commissioning
Powerwall 3LFP battery chemistry
Backup gatewayAutomatic changeover when the grid drops
Smart tariffsOctopus Flux, Agile, Cosy and Go
Tesla appMonitoring set up at handover
01. Who this page is for
One home energy system,
One home energy system,
not a battery bolted on.
This page is for homeowners considering a Tesla Powerwall, either to pair with solar panels already on the roof or as part of a new solar and battery installation. Synergy Power is a Tesla Powerwall Certified Installer, alongside our MCS, RECC and TrustMark credentials, and our own engineers install every Powerwall 3 system.
We treat battery storage as part of your home’s whole energy system, not a stand-alone product bolted on to whatever you already have. The Powerwall, a backup gateway where needed, Powerwall 3’s built-in solar inverter for a new array or AC coupling for a retrofit, and the monitoring are all designed together.
Every installation is MCS-registered and covered by RECC. Powerwall 3 can work with time-of-use tariffs such as Octopus Flux, Agile, Cosy or Intelligent Octopus Go once you have switched tariff with your supplier.
- Homes with existing solar
- New solar and battery installs
- EV owners on overnight tariffs
- Homes wanting backup power
02. What a Powerwall does
Store the sun, cover the evening,
Store the sun, cover the evening,
back up the home.
Tariff optimisation
Charge on cheaper overnight rates and run the house from the battery through the peak, using the Tesla app with the tariff you choose.
Backup power
With a backup gateway, an automatic transfer switch can keep the whole home, or the circuits you choose, running when the grid goes down.
Retrofit or new build
AC coupled to solar you already have, or a hybrid design for a new solar and battery installation.
Explore battery storage
03. How it works
From feasibility study
From feasibility study
to a commissioned Powerwall.
Step 01
Free feasibility study
Send us a recent electricity bill. A UK engineer sizes the battery against your consumption and gives you a savings forecast and indicative return.
No obligationStep 02
Home survey
Our own engineer checks the roof, consumer unit, cable routes and where the battery and gateway will go.
Own engineersStep 03
Design
We use Powerwall 3’s built-in solar inverter or AC coupling to suit your solar and specify the backup gateway where needed.
One integrated systemStep 04
Installation
Our MCS-certified team installs, tests and commissions the Powerwall, gateway and connections.
In-house teamStep 05
Handover
You receive your MCS certificate and Tesla app monitoring, ready to use with the tariff you choose.
Long-term support
05. Free feasibility study
Find out what a Powerwall
Find out what a Powerwall
would do for your home.
Tell us about your home, your tariff and any solar you already have. A UK engineer will size the system from your consumption and talk you through the figures.
- Estimated system size
- Estimated bill savings
- Carbon reduction estimate
- Indicative payback
06. Powerwall FAQs
Your Powerwall
Still have a question?0330 043 1047 Your Powerwall
questions answered.
Does a Powerwall give me backup power?
It can. With the backup gateway, Tesla Powerwall 3 can provide whole-home backup and switches over automatically when the grid goes down. Where whole-home backup is not suitable, we can design for partial-load backup instead.
Do I need solar first?
Not necessarily. A battery on its own can still pay its way by shifting your usage to off-peak rates. Solar and a battery together give the best result, but a battery alone makes sense for many UK homes.
How big should my battery be?
That depends on your daily consumption, the size of your solar array and your tariff. Our design team works it out from your actual meter data as part of the free assessment.
What tariffs work with a Powerwall?
Time-of-use tariffs such as Octopus Flux, Cosy Octopus and Intelligent Octopus Go. You switch tariff with your energy supplier yourself, and as an Octopus Energy Trusted Partner we can give you the information you need.
Do I get 0% VAT on a Powerwall?
Currently, yes, for homes in Great Britain. Under HMRC's energy-saving materials relief, battery storage installed in residential accommodation is zero-rated until 31 March 2027, whether it is fitted with new solar or added to an existing system.
Can a Powerwall be added to my existing solar panels?
Usually, yes. Powerwall 3 can be AC coupled to most existing solar systems, including ones we did not install. We check compatibility with your inverter and consumer unit at survey.
Do I need DNO approval for a Powerwall?
Smaller systems are usually connected and then notified to your Distribution Network Operator under G98. Larger systems need a G99 application approved before connection. We confirm which applies to your installation at design stage and handle the paperwork.
07. Related
More for
More for
your home.
Store the sun.
Back up the home.
A free feasibility study from our UK engineering team: battery size, savings forecast and indicative return for your home.