The idea

Problem: The typical home uses more electricity in the evening than during the day, when solar energy is plentiful. Without a home battery, excess solar energy is sold to the grid and bought back in the evening, often at peak rates
Solution: Bridge the gap between energy supply and demand by using a battery to store excess solar energy generated during the day. This helps to cut household energy bills by up to 15%

Ambition: To become the leading UK supplier of affordable home energy storage solutions

Source: National Grid, Powervault, Telegraph, Tesla

The prize

Market: Since 2010 solar panels have been fitted to more than 550,000 roofs. Subsidies are driving rapid growth in installations, estimated to reach 2m installations by 2020
Target: Targets bigger family homes and landed properties. The cost of lithium-ion batteries is expected to reach mass adoption costs by 2020, making it cheaper for households to maintain home batteries

Source: DECC, Deutsche Bank, Business Green, Utility Week, Imperial College, Solar Power Portal, Low Carbon Innovation Coordination Group

the exit

Advantage: Has a pending patent for its plug-and-play system and is simple to retrofit without requiring significant rewiring or inverter replacements - a competitive advantage within the installers distribution channel
Potential exits: 
- OEM (e.g. BMW, Siemens, Nissan) looking to enter the renewable space
- Utility or smart grid companies

Source: Mergermarket, Samsung, FT, Google