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Octopus Power Pack is a vehicle to grid tariff for electric car drivers whose vehicle and charger can send electricity back to the network. It sits beside a compatible Octopus import tariff and uses the connected car as a flexible energy resource. Octopus manages when the vehicle charges and when stored energy is exported. Eligible managed vehicle charging is then credited back, making it free under the rules. This guide was checked on 10 July 2026.
A vehicle to grid system allows electricity to flow in both directions. The car charges when Octopus chooses suitable periods, then discharges when the electricity system needs support. The driver provides a departure time and charging target, while Octopus creates the schedule. Electricity leaving the vehicle first meets demand inside the home. Any surplus passes through the smart meter onto the local distribution network. Power Pack applies only to energy associated with the connected vehicle. The rest of the home remains billed through its import tariff. Joining does not make all household electricity free.
Free charging describes the final accounting result rather than a zero price shown against every charging period. The monthly bill initially charges all imported electricity, including vehicle charging, at the household tariff rate. During the first week of the next month, Octopus calculates the electricity used for eligible managed vehicle charging and adds a credit intended to cancel that cost. The charger provides the measurements. Boost charging is excluded, so an urgent manual charge remains billed at the normal household rate. The statement may therefore look different from a tariff with a dedicated zero pence unit rate.
Power Pack remains limited because vehicle to grid technology is developing. On 10 July 2026, Octopus listed one compatible combination: a vehicle to grid enabled BYD Dolphin with a vehicle to grid enabled Zaptec Pro charger. A car described as bidirectional is not automatically eligible. The exact vehicle, charger, software integration and export arrangement must work with the Octopus platform. Octopus does not promise to install a compatible bidirectional charger for every applicant.
The property needs a smart electricity meter that Octopus can connect to and that is registered for export. Half hourly data and charger measurements let Octopus separate vehicle activity from household consumption and other exports. The customer must hold permission from the local distribution network operator to export at least 5 kilowatts and provide the relevant G99 certificate. G99 covers generation equipment operating in parallel with the public network where the capacity falls outside the simpler G98 route. Octopus says a G99 application can take between 10 and 45 working days.
Power Pack requires the car to remain available for substantial periods. The customer must provide at least 20 plug in sessions each month, with every session lasting at least 12 hours. Monthly vehicle charging must not exceed 210 kilowatt hours, which Octopus describes as roughly 625 miles. These conditions give Octopus flexibility to charge when electricity is cleaner or cheaper and export when the system values energy more highly. A driver who plugs in briefly or covers high mileage may not provide enough flexibility. If the customer fails the eligibility conditions in a month, the vehicle charging credit may not be paid. The car electricity would remain charged at the home tariff rate.
Drivers can set a minimum battery state so Octopus does not discharge below an agreed reserve. Octopus requires that minimum to be below 30 per cent, preserving capacity for grid support. The customer states when the car is needed and how much energy should be added. Octopus gives those preferences priority, but does not guarantee every requested target. Connector limits, late changes, communication failures or insufficient connection time can affect charging.
Power Pack must sit beside another Octopus import tariff. It is not compatible with Agile, Tracker or any Intelligent Octopus import tariff. A customer using one of those products must switch before joining. The required export product is Octopus Power Pack Export. For solar panels or a separate home battery, customers can select an eligible preferred export rate. Octopus includes the calculated value of those exports within its monthly credit. Electricity discharged from the car supports the free charging arrangement rather than earning a separate ordinary export payment. Octopus says it can distinguish vehicle exports from electricity produced by solar panels or released by a home battery. There is no additional Power Pack standing charge because the customer already pays the standing charge attached to the main import tariff.
Joining gives Octopus continuing control over the connected vehicle or charger for charging, export and electricity system services. The customer must maintain an active device authorisation and cannot place the same technology into a competing flexibility scheme. The terms state that Octopus does not accept liability for technology wear, scheduling failure or electrical faults beyond its general contractual liability. Drivers should consider the vehicle warranty, charger warranty and manufacturer guidance on bidirectional use.
Octopus estimates that a driver covering 7,500 miles a year could save ยฃ620 compared with Flexible Octopus and ยฃ161 compared with Intelligent Octopus Go. The example assumes consumption of 0.306 kilowatt hours per mile and is not guaranteed. Power Pack is most suitable for a compatible driver with predictable routines, modest monthly mileage, long home parking periods and approved export capacity. It is less practical for frequent long distance travel, irregular parking or households wanting Agile, Tracker or Intelligent Octopus pricing. The tariff shows how an electric car can become part of the electricity system rather than remaining a passive load. The offer is attractive, but eligibility is narrow and the commitment is substantial. Applicants should confirm every technical, network and lifestyle requirement before treating future home charging as free.
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