> There's an emergency. Power is out. You use your car battery to power your home. You have to go out for supplies. Your family is left without power at home wh

> There's an emergency. Power is out. You use your car battery to power your home. You have to go out for supplies. Your family is left without power at home while you drive off into the darkness As opposed to your family not having power both when you are out for supplies and when you are home? It turns a power outage from an event where your family is without power for the whole event into an event where your family is without power during the intersection of the time of the power failure and the time you are out getting supplies. For most of your other scenarios where you need to evacuate and your battery is 50% depleted because you were powering the house before evacuating that will usually not be a problem because most unexpected evacuations don’t require evacuating a great distance.