Solar batteries store excess energy generated by your solar panels for later use.

During the day, solar panels often produce more electricity than your home consumes. Instead of sending this surplus back to the grid, it’s stored in a solar battery as chemical energy. When solar production drops—such as at night—the battery’s inverter converts the stored energy into AC electricity for your home. This provides a continuous power supply and reduces reliance on the grid.

Benefits of this process include:

• Reducing energy waste

• Maximising self-consumption of solar power

• Ensuring a continuous power supply

• Store Excess Energy – Capture extra electricity your solar panels produce during the day for use at night or on cloudy days.

• Lower Energy Bills – Use stored energy instead of buying electricity from the grid, reducing your monthly costs.

• Energy Independence – Rely less on the National Grid and protect yourself from rising energy prices.

• Backup Power – Keep your home running during power outages or emergencies.

• Maximise Solar Efficiency – Increase the percentage of solar energy you use, reducing waste.

• Potential Income – Sell surplus electricity back to the grid through schemes like the Smart Export Guarantee (SEG).

• Environmental Impact – Reduce reliance on fossil fuels and lower your carbon footpri

The Tesla Powerwall efficiently stores excess energy from your solar panels. When sunlight is limited or energy demand is high, this stored power provides a reliable backup, helping you reduce reliance on the grid.

We’re proud to be one of the few approved and accredited Tesla Powerwall installers.

Key Specifications:

• Usable capacity: 13.5 kWh

• Depth of discharge: 100%

• Efficiency: 97.5% round-trip

• Warranty: 10 years

• Operating temperature: -20°C to 50°C

• Weight: 114 kg

• Certification: Grid standards UK G83/G59/G100

• Installation: Floor or wall mounted, indoor or outdoor

• Supported applications: Solar self-consumption, backup power, time-based control

Store your extra solar energy and use it whenever you need with Fox ESS lithium-ion batteries. Designed to be safe, efficient, and flexible, these batteries help you get the most from your solar system.

Why choose Fox ESS?

• Flexible & stackable: Add more capacity as your needs grow

• Long-lasting: Over 6,000 charge cycles for years of reliable use

• Efficient & smart: 98% charge/discharge efficiency with real-time monitoring

• All-weather ready: Works in temperatures from -10°C to 55°C

• Quiet & low-maintenance: Natural cooling with no noisy fans

• Versatile installation: Floor or wall mounted, indoors or outdoors

• Power your home your way: Supports solar self-consumption, backup power, and time-based energy control