As a retired couple living in a reasonably sized house my wife and I had noted the way electricity prices are likely to increase over the next few years with various subsidy schemes to new generators. We therefore wanted to do what we could to minimise our use of expensive power. We decided to install PV cells where it made sense, and more importantly to use battery storage to take power overnight in cheap hours when electricity demand is light, and use it to power our house during the daytime hours.
Following a personal recommendation, we contacted the Little Green Energy Company. Their chief executive visited us in person, taking note of our objective and our needs. He recommended that we install a Tesla Powerwall 2 configuration.
We had previous excellent experience with Tesla and their car, which confirmed the manufacturer. We wanted to be able to charge our electric vehicles and run other house equipment, which required a 20KW supply necessitating a four Powerwall configuration. This gave the added advantage that we could then store 54 KWh and take advantage of overnight pricing, plus the potential in the future to optimise with half hourly pricing through smart meters.
Following our acceptance of the estimate, the company agreed an installation date less than 6 weeks ahead. The installation team was two men with extensive previous experience. They assessed the site quickly and recommended the best placing of the Powerwalls to minimise the impact on the location, and then commenced the installation.
The team were aware that this would be the first 4-Powerwall installation in the UK. We were greatly impressed by the careful planning which preceded equally perfectionist installation. They went to great efforts to ensure that the installation was of the highest quality with extremely neat and well-placed cabling, with switchgear which ensured all circuits were protected to the greatest extent possible, and that every item was clearly labelled. Amendments to the existing house wiring were wisely designed for full function and minimum disruption. The actual installation is almost a work of art, and visitors comment on how good it looks, an unusual comment for such hardware!
Their testing of the system was very thorough, and identified no issues. They explained clearly and simply the necessary (and minimalist) operating procedures needed for multiple Powerwalls, and ensured that we could operate them.
Throughout the entire project from first contact, their communication has been exemplary: timely, clear, concise and accurate. The team were a pleasure to have around.
Given that it was the first installation of this scale, once it was operating, Tesla sent two of their engineers to do a full site survey including detailed impedance and other measurements. They certified the installation as meeting all their specifications fully.
As customers, the installation has exceeded all our hopes for quality, function and performance and is immediately delivering the benefits we had planned. We would recommend both The Little Green Energy Company as installers and Tesla as battery providers to anyone who could benefit from storage.