Vehicle recharge of home energy storage

A method for managing energy for a building, comprising:

• connecting a power line of the building to a battery of a vehicle via a charger;
• predicting a power outage and a corresponding duration using data from a cloud server;
• monitoring power consumption of one or more devices of the building;
• calculating an amount of energy needed for the building for the corresponding duration based on the power consumption;
• comparing the amount with a total available energy reserve determined using available energy of both the battery and an energy storage separate from the vehicle;
• responsive to occurrence of the power outage, supplying electric energy to the building from the battery and from the energy storage;
• and
• instructing the vehicle to recharge the battery at a location other than the building and then return to the building at a predefined time before stored energy of the energy storage falls below a predefined value.