Kaluza’s acquisition of a majority stake in Juuce last week was described, in the press release, as “accelerating the journey to a smart, flexible energy system”. That is one way of putting it. Another is that Octopus Energy’s software arm has now acquired four flexibility-adjacent businesses in 18 months and appears to be building something considerably more ambitious than a billing platform with good PR.
The shape is becoming clear. Kaluza is not buying customer books. It is buying capability: EV charging orchestration, smart-meter data interpretation, demand-side response infrastructure, and now, with Juuce, the back-end software that ties an EV’s charging behaviour to a household’s tariff. Each acquisition is small. The combination is not. By the end of the year, Kaluza will be able to offer a managed flexibility stack to other suppliers that almost no one else in the UK market can match.
That matters for the suppliers who have not been thinking in these terms. The competitive question for tier-two retail energy is no longer “do you have a flexibility offering”. It is “do you have one that works at half-hourly resolution, integrates with the customer’s hardware, and prices the asset accurately”. For most suppliers, the honest answer to that question is no. The honest follow-up is that building it in-house is now harder than buying it from Kaluza, which is presumably the point.