A portable battery energy storage system with an inverter as a backup power source for an electric car is an interesting idea, but is it a viable solution to prevent getting stranded? Bjørn Nyland had an opportunity to test the EcoFlow Delta Max model for charging a Tesla Model Y and see how much range can really be replenished (taking into account the energy losses).
The EcoFlow Delta Max is equipped with about a 2 kWh battery and it can supply up to 2.4 kW of AC power (at 230 V). The power output level sounds like enough for basic charging. Read original article here.