Enjoy the sunshine… at night.
Power through a power cut
After Elon Musk’s inspiring presentation at the launch of the Tesla Powerwall, demonstrating how the move to a fossil fuel free planet is achievable with just Solar & Storage the world went battery storage crazy. Tesla’s Powerwall is a big leap forward in solar battery technology. With up to 13.5kWh of storage and capable of delivering 5kW of power continuously and up to 7kW for 10 second periods, the Powerwall is extremely good value as the price per kWh of storage is the lowest on the market.
All models of Powerwall now come with a Backup ‘gateway’, which ensures you still get electricity if there’s a powercut. Lights, washing machines, dish washers, ovens and hobs will keep working. The gateway even automatically disconnects heavy load appliances like EV chargers and heat pumps, so you have enough power for the essentials.
Having a large amount of storage will set you up to benefit from the ‘time of day’ charging that Smart Meters will bring, meaning you can charge for free from your solar, or from the grid at cheap times further increasing your financial benefits.
The Powerwall is the most popular battery on the UK market.
Mounting: Wall or Floor Mounted, Indoor / Outdoor
Inverter: Fully integrated Tesla inverter
Usable Capacity: 13.5 kWh
Power: 5 kW continuous, 7 kW peak
Round Trip Efficiency: 90%
Operating Temperature Range: -20C to 50C (-4F to 122F)
Warranty: 10 years
Dimensions: 1150mm x 755mm x 155mm
Price: £7799 plus VAT fully installed
Naked Solar are Tesla Powerwall Certified Installers, which means we offer a customised solar plus battery solution that enables you to access the free, abundant power of the sun and reduces your reliance on fossil fuels. All Tesla certified installers are regularly quality checked by a Tesla engineer to ensure all installs are to the highest standards.
If your energy costs vary through the day, or if you are on a time-of-use rate plan, Powerwall can take that into account to maximise your savings. When electricity is expensive, Powerwall uses stored low-cost energy to power your home. Regional regulations may apply to the operation of Powerwall, which may vary some aspects of this mode.
Powerwall has an array of electrical current sensors that monitor energy usage and solar energy production. Tesla’s intelligent forecasting software predicts future usage and production. Based on the varying cost of electricity from the grid, Powerwall optimises the times it charges and discharges. As Powerwall learns, you get the most value from your solar production without having to change how or when you use energy.
You can set up a schedule to let Powerwall know the times electricity is expensive (peak) and inexpensive (off-peak).
Existing Powerwall owners will see this new feature rolled out via a firmware update over the coming weeks.
We’ve put together a guide for you to prepare for the installation of a Powerwall. If you need more info or are not sure, please call or email (details at the bottom of the page).
The gateway has a built in DIN rail so MCBs can be installed inside the gateway if you like e.g. Solar & Battery MCBs.
The gateway also needs a TT electrode to maintain an earth connection during a powercut (backup conditions).
Lithium Ion batteries are most efficient around 20°C. The Powerwall has a heating/cooling system so it can look after itself. However if you install it outside, the heating will use some of the energy in winter, when energy is most precious. Customers who are aware of this tend to favour utility rooms, under the stairs or garages to site the battery.