Across the UK, more households are investing in renewable energy and storage to cut bills and reduce reliance on the grid. But in Aylesbury, one property has taken this ambition to extraordinary heights.
The estate now hosts eight solar systems, three battery systems, three heat pumps, multiple EV charge points, and even a wind turbine. Most recently, the setup expanded further with the addition of 12 Tesla Powerwall 3 expansion packs, lifting the site’s total battery capacity to a staggering 305 kWh.
Expanding with Tesla Powerwall 3
The manor house already had four Tesla Powerwall 3 units in the basement. To build on this, three expansion packs have been added so far, with another nine on the way once Tesla rolls out a software update allowing multiple expansion packs across the same supply.
Each Powerwall 3 can be paired with up to three expansion packs, dramatically boosting storage without taking up new wall space. At this property, stacking was chosen to save room, bringing the main house system alone to 216 kWh with over 38 kW of inverter throughput.
Energy systems working together
This installation isn’t just about batteries. The hay barn features 30 JA Solar 440 W bifacial panels producing around 11,550 kWh a year, tied to three Tesla Powerwall 3 units and a Tesla Wall Connector for 22 kW three-phase charging.
The manor itself consumes between 90,000 and 100,000 kWh annually, largely driven by heat pumps and a swimming pool. With 216 kWh of storage in the main house and 305 kWh across the estate, the site can now balance its demand against solar, wind, and smart tariff strategies.
The wind turbine, first installed in 2008, continues to generate most of its energy in the winter months, neatly complementing solar output. While turbines won’t suit most UK homes, on large rural sites like this they still provide real value as part of a diversified energy mix.
What does this mean day to day?
On a typical spring day, the property can use more than 175 kWh of electricity. The combination of solar, wind, and large-scale battery storage allows the household to cover the majority of its usage, storing off-peak power and discharging when needed.
Across the year, grid independence of around 70–80% is expected. While few homes will ever need 305 kWh of storage, the principle applies at all scales: combine generation with storage and smart tariffs, and you can significantly reduce your reliance on grid energy.
A glimpse into the future of home energy
This remarkable project may well be the largest home battery system in the UK. More importantly, it shows how different renewable technologies can work together to achieve meaningful energy independence.
For most households, the journey will be on a smaller scale, but the approach remains the same: integrate solar, add batteries, and make use of tariffs that reward flexibility. With the right mix, the path to lower bills and lower emissions is within reach.
If you’re interested in exploring what battery storage could do for your home or business, get in touch with our team today.
