Early Tesla Powerwall Installations In UK Explored – Video

SEP 15 2016 BY MARK KANE 12

An early Tesla Powerwall installation in the UK is featured in the most recent episode of Fully Charged.

Tesla Powerwall Garage Installation

Tesla Powerwall Garage Installation

According to host Robert Llewellyn’s guests on the show, combining solar PV with a Tesla Powerwall home energy storage system enables one to limit electricity demand from the grid to only a few percent per the day (at least on the sunny days).

In the average case explored, the electricity usage for the whole year is expected to be 75-80% from the solar/Powerwall system combo, as there are still periods of cloudiness (and less available solar hours available between November and February) that still the grid need to pitch in.

“A small start to what could be a game changing technological shift. A visit to one of the first Tesla Powerwall installations in the UK.”

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12 Comments on "Early Tesla Powerwall Installations In UK Explored – Video"

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I don’t understand. Is there no net metering in the UK?

Don’t get me wrong–without extremely cheap grid storage (or even with extremely cheap grid storage), net metering will eventually dry up when grids use 100% renewables during peak solar hours.

However, today that’s not the case, and when you buy a Powerwall, you’re paying $4000 to store roughly $1 worth of electricity, at least in the continental US.

The UK’s electricity is no doubt more expensive, but even if there is no net metering offered, and the economics pencil out over twenty or thirty years (unlikely given that the cost of grid electricity keeps dropping), most people will likely save more by buying next year’s storage solution, or a storage solution five years from now, which will be so much cheaper it will outweigh any short term gains from storage. Why buy a Powerwall today when five years from now it will be half the price?

I am not aware of any net metering here in the UK, at the moment, any excess generation that doesn’t get used up gets sold back to the utility company for about 1/3rd of the cost to buy each kWh (it’s about 15c to buy and you get about 5c if you sell unused kwh’s).

I recently enquired about the cost with Tesla UK for the Powerwall set up and they quoted £5,500 (about $7,500-$8k) for everything including installation with each battery costing an additional £2,500 ($4k) roughly.

I will wait as I am planning an 8kw system with 4 batteries (unless someone else like BMW or Nissan come up with one battery in the 25-30kWh range) so it will pay to wait until the prices bottom out a bit in a few years time.

You lucky British. In Spain YOU HAVE TO PAY for excess generation ‘because you are using the network that belongs to the electricity company’. Unbelievable but true.

I think technically, we do pay as we have a standing daily charge (one for each type of fuel) whether we use electricity and/or gas or not,

Also, the electricity company does not own the network, the national grid (state) does.

Not sure if that is the same for Spain though ?

In Spain the Transport Network (>30 kV) belongs to a semi-private (80% private; 20% state) company called Red Electrica and the Distribution Network (<30 kV) belongs to electricity companies.

So, in Spain, when you have excess generation you have to pay to the electricity company (government says 'because when you inject electricity you are using its network'). That's why nobody installs solar PV panels in Spain since 2-3 years ago, despite of the huge amount of annual sunshine hours.

Many Spanish people think electrical lobbies are paying our politicians to maintain this absurd situation, but nobody has proven it yet.

That’s about as bad as it gets for regressive environmental and social policy. Will they throw you in jail if you run an electric line to your neighbor’s home and share the sun with a barter type system?

It’s even worse than that. The electricity bill is composed of a fixed term depending on maximum power (kW) available to you, and from real energy usage.

This fixed term has increased a lot this past years, while the real usage is relatively cheap (from 0,5 to 0,15€ + taxes per kWh depending on time of day and contract). In my case about 1/3rd to 1/2 of my invoices is for the fixed term.

This schema doesn’t encourage you to spare too much.

Also, you are limited in the amount of solar you can install. Your PV installation’s peak power cannot exceed the max power you have from the grid. Want to have a 6kW peak PV + 3 kW grid -> not allowed.

Batteries are not plain illegal in Spain (a lot of people think that), but you are not allowed to lower the power cap. Your are only allowed to use batteries if you don’t lower the power you contract.

I don’t know what electricity costs in Spain but surely this is as good a case as it gets for going off-grid with PV and some storage?

There’s no net metering, but there is TOU. it makes the economics relatively better for battery-backed systems compared to basic grid-tied solar since the daytime solar can be used to provide evening peak power.

Also, battery-backed systems can run independently of the grid so also give you some back-up.


How do you figure we are spending $4000 for $1 worth of electricity?

With the £18 Billion Chinese Nuclear Reactor Deal being given the green light today, in the UK, one has to wonder how many Powerwalls and rooftop PV Solar installations could have been delivered to single family homes, for the same cost? Oh well, hope the Brits saw the movie “The China Syndrome”. Those stable “base load” Nuke Electrons can get out of hand, if and when the script is not followed to the letter.

In Australia we pay around 30 cents a kwh plus a service fee of a $1 a day for connection to the grid. we are going down the road of privatisation of the power grid and the return of 6c if you sell back unused kwh’s. Battery storage will be popular in Australia due to the high cost of energy..