Choosing the right time-of-use tariff can transform a solar-and-battery setup from a novelty into a genuine money-saving powerhouse. An energy tariff determines how much you pay for every unit of electricity you import, and what you receive for every kilowatt-hour you export. While most standard plans charge a flat rate, Octopus Energy’s smart tariffs use time-of-use pricing to reward off-peak consumption and peak exports, perfect for households with solar panels, home batteries, EVs or even heat pumps. Though rates vary regionally (London tends to be about 10 % higher than Yorkshire), the principles we explore here apply across the UK.
