Overview
In late 2025, our team completed a full Tesla Powerwall 3 installation with an Expansion Pack for a residential property in Hampshire. The homeowner was looking for greater energy independence, protection against rising electricity costs, and a future-proof battery system capable of supporting solar integration and backup functionality.
Client Objectives
The customer approached us with three clear priorities:
1. Maximise Self-Consumption of Solar Energy
Although the property had an existing solar PV system, peak daytime generation often exceeded household demand. The homeowner wanted to store this surplus to use later in the evening.
2. Protect the Home from Power Outages
Hampshire’s rural locations can experience occasional grid interruptions. The client wanted a dependable backup solution capable of supporting critical loads.
3. Reduce Long-Term Energy Costs
The customer wanted to leverage smart time-of-use charging and reduced reliance on grid electricity.
Why Tesla Powerwall 3?
The Tesla Powerwall 3 was chosen due to:
- Integrated solar inverter compatibility
- All-in-one architecture for faster installation
- 13.5kWh of usable storage per unit
- High continuous and peak output power
- Seamless backup functionality
- Scalability for future expansion
Adding the Expansion Pack increased total capacity to 27kWh, doubling usable storage and providing a robust energy resilience solution.
Results & Performance
Following installation, the property saw immediate benefits:
1. Significant Boost in Solar Self-Consumption
With 27kWh of storage, the home regularly stores enough energy during the day to operate almost entirely off-grid in the evenings.
2. Increased Resilience
Backup testing showed uninterrupted power supply during simulated grid failures, with all critical circuits operating as normal.
3. Lower Energy Bills
The homeowner now takes advantage of off-peak tariffs, storing cheap electricity and shifting consumption away from peak rates.
4. Improved Visibility & Control
The Tesla app provides real-time energy monitoring, giving the customer complete oversight of solar production, battery charge, and usage patterns.
Conclusion
This Hampshire Powerwall 3 installation showcases how modern home battery technology can deliver energy independence, backup protection, and long-term cost savings. With the Expansion Pack installed, the customer now enjoys industry-leading storage capacity, intelligent time-of-use optimisation, and true peace of mind.
If you’re considering a Tesla Powerwall 3 installation in Hampshire or the surrounding areas, our team can design and deliver a system tailored to your home and energy usage.
