Greetings, new user here. If this topic has been posted somewhere else, I appologize in advance, but this is the first time on this forum. In short, here is my question: is there an expansion cable in the works for EcoFlow Delta Pro ( just delta pro) ? If not, can it be done ? if yes, what is the expected time ? and if also yes, what would be the best WattCycle battery to use it in tandem with ?