Greenest Home Solar Battery
Sustainable Energy Storage with Sodium Battery
Discover Eleven's innovative sodium battery system, designed for sustainable, efficient energy storage. Our solution seamlessly integrates with solar panels, providing long-lasting, eco-friendly energy day and night.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
By clicking ‘Request a Quote’ you agree to our Privacy Policy.
Advantages of Eleven's Sodium Battery System
Sustainable and Eco-Friendly
Unlike traditional lithium-ion batteries, our sodium batteries are made from abundant, non-toxic materials. Sodium is widely available and sustainably extracted from seawater, making it a more environmentally friendly and ethical choice for energy storage.
Reliable Performance in Extreme Temperatures
Due to its chemistry, our sodium battery can operate from -20°C to 55°C, compared to lithium batteries, which typically function between 0°C and 40°C. This makes our sodium batteries more reliable in both extreme cold and hot conditions, ensuring year-round performance.
Intelligent Energy Management System
Our software goes beyond simply controlling battery charging and discharging. It optimises energy use by seamlessly integrating with solar panels, battery storage, EV chargers, and other appliances. By monitoring and managing energy flow, it maximises renewable energy usage and reduces electricity costs through smart scheduling based on your tariff and solar forecasts.
Features
6 kW Single Phase Hybrid Inverter
- 9 kW maximum solar power input
- 6 kW continuous power output
- 27.2A maximum output current
- 98% power conversion efficiency
- 95V PV starting voltage
- 2 MPPTs
- 80-550V MTTP voltage range
- 10 ms on/off-grid switchover
- IP65 ingress protection
- Operating Temperature Range: -20°C to 55°C
- Dimension (W x H x D): 500 x 470 x 180 mm
- Weight: 23 kg
- 10-year product warranty
Download Datasheet
4.5 kWh Expandable Sodium Battery Pack
- 90% depth of discharge (4.05 kWh usable capacity)
- Rated voltage 45V
- Operating voltage: 33V to 59.2V
- Maximum charge/discharge rate: 100 A
- IP20 ingress protection
- Outdoor battery cabinet available
- Operating Temperature Range: -20°C to 55°C
- Dimension (W x H x D): 594 x 525 x 155 mm
- Weight: 54.5 kg
- Up to 8 battery packs (32.4 kWh usable capacity) can be connected to a single inverter
- 10-year product warranty
Download Datasheet
Energy Management Platform
- Accessible via mobile app or web browser
- Optimised algorithm for maximum solar yield through solar forecast and intelligent electricity export
- Integrated monitoring of third party devices, such as EV charger and heat pump
- Automatically manage immersion heater based on available solar energy
- Easy access to real-time and historical data on energy production, consumption and storage.
- Allows remote control of settings including charging and discharging schedules and export power limit
- Prevents home battery from discharging to EV
- UK-based secure data hosting
- Compatible with Agile Octopus tariff
Try our demo software
Products Underdevelopment
Eleven is developing a range of more powerful sodium battery systems aimed to address diverse energy needs and help both households and businesses transition to clean energy generation and storage.
8 kW Single Phase System
12 kW maximum solar power input
8 kW continuous power output
3 MPPTs
10 kW Single Phase System
15 kW maximum solar power input
10 kW continuous power output
3 MPPTs
12 kW Single Phase System
18 kW maximum solar power input
12 kW continuous power output
3 MPPTs
20 kW Three Phase System
30 kW maximum solar power input
20 kW continuous power output
15 Units Parallel
Sodium - A Sustainable Alternative to Lithium
Lithium Mining’s Environmental Toll
Water-Intensive Extraction
Lithium mining from underground brines, such as in Chile’s Salar de Atacama, consumes vast amounts of water—over 1.9 million litres per tonne of lithium extracted.
Threat to Biodiversity
Lithium mining disturbs native habitats, threatening both plant species and migratory animals. The use of evaporation ponds in the extraction process alters water tables, impacting surrounding ecosystems.
Impact on Local Communities
Lithium mining drains water resources essential for agriculture and livestock farming, upon which local communities rely. Additionally, lithium and mining waste can contaminate soil and freshwater sources, further endangering local livelihoods.
Soaring Lithium Demand
Driven by the increasing demand for lithium in batteries for EVs and energy storage, the International Energy Agency expects demand for lithium to increase more than 40 times by 2040 if the world is to meet its Paris Agreement goals.
Greenbushes - world's largest hard-rock lithium mine in Western Australia
Eco-Friendly Advantage of Sodium Battery
Abundant and Accessible Resource
Sodium is over 1400 times more abundant than lithium. Eco-friendly extraction and processing methods, well-established globally for producing sodium chloride (NaCl) and soda ash (Na2CO3), are already in place. These widely available materials are now being use to create sustainable sodium batteries, offering a more environmentally friendly option in energy storage.
Sustainable Materials for Production and Recycling
- Cathodes: Made from industrial byproducts such as iron oxide and manganese oxide, minimising waste.
- Anodes: Produced from abundant materials like cardboard, straw, or coal.
Environmental and Ethical Benefits
Sodium-based batteries avoid the use of toxic or unethically sourced materials like cobalt, offering a greener and more socially responsible alternative to lithium-ion technologies.
Our mission is to create eco-friendly, reliable and affordable energy storage
We chose the name "Eleven" because it represents sodium’s atomic number, a key element in our technology.
Founded by experts in renewable energy, software engineering and power electronics, our team brings extensive industry experience. With a strong focus on sustainability, innovation, and reliability, we are dedicated to developing cutting-edge energy storage systems and delivering exceptional service.
Founded by experts in renewable energy, software engineering and power electronics, our team brings extensive industry experience. With a strong focus on sustainability, innovation, and reliability, we are dedicated to developing cutting-edge energy storage systems and delivering exceptional service.
Leadership team
Yichen Shi
Chief Executive Officer
A serial entrepreneur passionate about developing sustainable solutions for energy transition, especially cost-effective battery systems that can solve renewable energy’s intermittency problem.
Neil French
Chief Technology Officer
A seasoned innovator and experienced software engineer, Neil specialises in developing advanced Energy Management Systems and integrating renewable technologies into smart homes.
Andy Rankin
Chief Growth Officer
Founder of Midsummer Energy, one of the UK’s largest renewable energy distributors, Andy has extensive expertise in the clean tech market and a proven track record of building successful companies in the renewable energy sector.
Teng Long
Scientific Advisor & NED
Professor of Engineering at the University of Cambridge, specialising in power electronics, with a wealth of experience in designing innovative power and energy systems.
News and insight
The Eleven Blog explores the world of sodium battery technology, offering insights into applications, setup tips and advancements in energy storage solutions.
Visit Blog
