Keep your home going during a power blackout
During power cuts Powerwall will automatically keep your important loads
running, including allowing your solar panels to keep producing and
charging/discharging as normal.
Powerwall will keep the lights on, maintain the electricity
supply to your boiler and controls, prevent the frozen food from defrosting and
maintain the broadband so you can keep working.
Powerwall allows you to set a portion of the battery to reserve for these events.
Time-Of-Use (TOU) electricity users
Time Of Use (TOU) electricity tariffs,
These tariffs offer different electricity prices during the course of the day.
“As an example charge your battery at 8p per unit, to then
be used from your Powerwall 2 - at utility peak prices 15p”
The traditional TOU tariffs are Economy 7 and Economy 10, but newer entrants
to the electricity market have pioneered innovative electricity tariffs that enable
owners to use their Powerwall to the fullest.
Time-of-use or (TOU) tariffs
Households on Economy 7 tariffs pay two different prices for their electricity.
For seven hours during the night they are charged a cheap ‘off-peak’ rate for
their electricity. This is usually used to heat the water cylinder, night storage
heaters and more recently,
Charge their Powerwall 2 Battery- charge electric vehicles.
The actual off-peak times vary by region – for homes in the Electricity
Northwest region it’s 00:30 until 08:00a The downside of this is that a more
expensive tariff is paid for usage outside these times.
Considering the positive effect of Solar panels in reducing the electricity bill
of any household during daylight hours, which is especially good for those on
Economy 7 as their peak rate electricity bill is reduced.
Battery storage and Economy 7
“note:- presently smart meters will not work as Economy 7”
The storage of surplus solar electricity is particularly valuable to those on
Economy 7 tariffs. This is because they will be using the stored electricity
during late afternoon, the evening and into the night, before the off-peak period
begins, allowing the stored electricity to be used during the day when demand
exceeds solar generation:-
For example
During the winter months we have less sunlight and therefore the solar
electricity generation is lower. The majority of battery storage systems will
hardly be used during this period.
However, Powerwall 2 has another trick up its sleeve.
Powerwall 2 can be programmed to automatically charge from the mains during
the off-peak electricity times. This allows the household to use cheap rate
electricity during peak rate times. If there is surplus solar electricity during the
day then it will still charge the battery and reduce the electricity bill
Description
Powerwall is an outdoor rated, wall or floor mounted home battery system
designed for self consumption of solar, load shifting and backup applications.
Powerwall contains an integrated thermal control system, battery management
system and Tesla’s own inverter, enabling a safe and efficient connection to all
solar PV systems, or standalone applications.
Powerwall contains a very useful 13.5kWh of usable energy storage.
This price is for a Powerwall with the backup gateway, meaning that it will
provide power in the event of a power cut.
This requires the electrical circuits:-
to be segregated into essential and non-essential loads.
In retrofit applications the backup supply can be a simple socket adjacent to the
Powerwall gateway, a couple of nominated circuits from the Powerwall’s
Gateway, or a dedicated consumer unit for the essential loads.
The initial price we could quote would be for a straight forward installation
as every home is different and a price can only be guaranteed after a
detailed survey.
To get a top-notch installation, make sure your installer is officially designated
by Tesla as a ‘certified installer’.
Solar Harvester are a Tesla a ‘certified installer’.
Certified installers have had to jump through hoops to obtain certified installer
status. They have been vetted by Tesla and take part in various, on-going
training and support activities.
Installation standards for Tesla Powerwall certified installers are monitored very
carefully. Tesla send round inspectors from time to time to ensure installations
are perfect.
Tesla has set the bar very high when it comes to keeping its customers happy.
How is the Powerwall wired up in your home?
Here is a typical installation process for the Powerwall:
Installation
1.
The Powerwall box is taken out of the delivery van and moved gently to the
base of the wall where it will be installed.
2.
One of the electricians then screws a mounting bracket into the wall.
3.
Next, the Powerwall is carefully placed upright onto a hoist.
4.
The Powerwall is lifted up and eased back down onto the mounting bracket.
5.
At this point the Powerwall is hanging nicely on your wall.
6.
Then your Backup Gateway – the brains of the system – is mounted on the
wall. This might be near the Powerwall or near your electricity import meter.
7. The Gateway is connected to your main fuse board.
8. Next, the Powerwall is connected to the Gateway.
9.
It’s also possible for your solar panel system to be wired into the Gateway.
10.
Then CT clamps are placed in appropriate places so that the Gateway can
monitor all essential energy flows in the home.
11.
There will also be isolators put in at various points for safety.
12.
The Gatweway can communicate with your home router via Wi-Fi, though
a wired ethernet connection is also recommended.
13.
The electrician then commissions the system and you’re ready to go.
Tesla Powerwall Price
Although the headline Tesla Powerwall price can seem high, it’s actually good
value for money in terms of cost per kWh of storage.
The typical cost of the Powerwall in the UK, supplied and installed, is about
£7,000 + VAT. That is for both the Powerwall battery itself, plus the new
Backup Gateway mentioned above.
Battery installations in the UK attract VAT at 20%. So the total cost to the
residential purchaser would be £8,400 inc. VAT @ 20%.
Please note: after the new VAT laws introduced on 1 October 2019, if a
home battery is installed at the same time as a solar PV system, then the
labour component of the battery and solar installations will have VAT @ 5%
applied the materials component of the battery and solar installations will
have VAT @ 20%.
Tesla Powerwall – who is it for?
The Tesla Powerwall 2 is a premium product.
There are cheaper home battery products out there, with lower storage capacity
But none as good value as the Powerwall.
Fact :- “Powerwall 2” battery storage systems is the lowest cost
battery per kwh
Typical buyers include:
·
EV car owners with solar panels. £50 into a Tesla will get you - 2,500 miles
·
Customers who want the very best storage technology available today
·
People who want to make use of smart tariffs
·
Customers who want an aesthetically pleasing, all in one product
·
Home owners who would like to mount the battery outside
·
Customers who suffer from power-cuts
·
People without solar panels who want to charge the Powerwall with cheap,
·
off-peak electricity at night and let it out during the day when prices are high
Tesla Powerwall is the most advanced Home Battery Storage
product in the UK in 2020
Self-Powered Home, Just add Tesla Powerwall 2.
Tesla Powerwall is the most technologically advanced
Home battery storage product in the UK in 2020
Tesla leading the way on price per kwh
Powerwall is the game changer for battery storage. It can take full
advantage of Time Of Use (TOU) electricity tariffs such as Octopus
Energy’s Agile and Go schemes, or Economy 7,
And can even keep things ticking along in the event of a
power cut! Powerwall has 13.5kWh of usable storage.