Depending what your house uses for power and what car/truck you use, you can often buy a 1-2kw inverter for your 12V and keep the important things going (oil heat, lights, internet, refrigerator, etc.)

You won't be able to use things like electric heat/cooking, dryer, etc but those things can usually wait for power to come back on.

You will need to idle your car while it is on, but efficiency, cost, noise and smell-wise it is far superior to buying a separate unit.

Even better if you have a hybrid or EV.