Our calculations for Sunsave Standard solar

• Electricity price change taken from ONS Consumer price inflation time series (MM23), showing 5.5% average increase between 2000-2020. Nobody can predict the future, but in this scenario we’ve assumed the same inflation going forwards.
• Our 'Medium' example is based on a typical four-bedroom family home in Essex using 4,000kWh of electricity each year, with a 5.16kW solar panel system and a 4kWh battery.
• This system costs £7,600 upfront and generates 5,117kWh of electricity each year, using 28% at home and selling the other 72% to the grid (earning up to 28.1p per kWh through the Octopus Flux tariff).
• Savings are calculated using System Advisory Model (SAM) which takes into account smart battery controls to maximise export savings.
• This system would also save 1.5 tonnes of CO2 each year, which over its lifetime is equivalent to 32 long-haul flights.