Yes there’s an expansion unit coming.
My opinion: pricey! I don’t need one that much at these prices, happy with what I have of a Powercore for small gadgets, a 120Wh UPS and my car as the backup generator for anything longer than a few days. Here outages are rare and if do happen it’s usually a few hours. Anything longer than a day then the problem is not at home, it’s all the infrastructure wider will cause the greatest problem.
I keep freezer outdoors so a power outage in winter isn’t going to do harm unless long, and I already had camping equipment to handle cold, cooking, lighting, equipment which can keep me going for weeks, if came to it. I have enough fuel to boil water and stay warm for months, but expecting my fuel stock to last decades as bad events are rare.
There are plenty who are under-prepared for a winter outage, but I also see vast over-reacting buying, for example, these huge battery products. By all means stock often used items which is a bad situation get consumed faster than normal, but to buy something this big expensive for a rare event is probably going to be a regretted decision.
I am sticking with what I’ve done for last few decades, handle 10 day without water, gas, electricity and all my items can move in a backpack as whatever may disrupt you may not be solvable with an RV.