Battery generator question
 

I think The answer is obvious, but these can't backfeed into the street if plugged in the wall and the power goes out , right?
The next question that prompted the first one-
I am thinking of buying one of these things and plugging my oil furnace into it .'
If I am not home the furnace will operate as it should even if the power goes out.
Is all this OK?

Yea, a UPS or battery backup only puts voltage to what is plugged into the back, not back down the cord plugged into the wall. Be sure to check how much the amperage it takes to start up the furnace. You will need a pretty large one to run a furnace for very long.

Yes -it is an oil furnace so the Eco Delta or whoever is plenty to run just the fan motors.

I just do not want it to be complicated, or hurting anyone.
So, these new battery things are nice cause i don't need a transfer switch hooked up in this way.
I love simple!

A couple of things to consider:

Most battery-style 'generators' have limited wattage, so while a basic 1kw or maybe even a 500w unit would run the blower fan on your furnace, but not much more. I got it; you want to have heat if the power goes out in the winter. But how about the 'fridge? Microwave? Internet? TV/Cable box? You could quickly exceed the capacity even to only power a few 'nice to have' things in your home.

In the winter, a heater blower motor will run quite a lot, and I wonder how long before the battery expires? Surely not more that a day or so at best, then, how to charge it back up?

In contrast, a gas-powered generator and X gallons of fuel would get you days of steady power. Sure, you gotta run it outside, but I'd guess a 1,500-3,000 watt model would run pretty much all the necessities to 'camp' indoors for a while.

Caveat: I used to work for Honda (generators).

Thanx-
I have generators but not smart enough to hook up self-starting with transfer switches.
To live in the middle of nowhere pretty far from somewhere is not always EZ.
This brings some nuances.
I have asked around, and even internet looking for answers.
SO, just purchased a little Honda 2200 thing with the inverter.! (Cute)
If I am here it would be running with the main off, and it would be charging the Battery of choice and run any little extras i need..
But 20/20 hindsight, --.. I just discovered a self-starting little generator !!!!!

https://us.ecoflow.com/products/dual-fuel-generator?variant=40573814014025

SOooooo
I think between all these options this can be solved .

I have a couple Westinghouse inverter generators. They sip fuel.