I’ve linked back to this topics originator’s Justin Haddens first post.
I think JustinH what you really wanted to know was just how big of home power station you’d have to set up. And how much it would then cost you to fuel it.
So your actual grid power meter or power bill is not going to give you this.
DainelG’s example that his Honda 2000 watt inverter-generator unit will not start and run a small air compressor.
I bough the wife a Honda 2000.
I already had an oilless diagram type portable Sear air compressor I’d used for family/friends go-too auto repairs. Air tools I wanted to speed buzz at least at 150 PSI. 115vac. On common shop/household 20 amp circuits.
That crazy little Honda would try, try to start the compressor for a minute or two until it would kick out. O.K. sez I. I need a bigger generator. Next I got a 20% larger unit in a Yamaha 2700 inverter-generator unit. It would not even try to start the air compressor motor. Kick out immediately. By wattage rating it should have. By listed horsepower ratings it should have marginally.
Back-up, fall-back, planB&C me I can first start the Yamaha. Get it warmed up stabilized. THEN parallel connect up and start the Honda and it will frequency sync with the Yamaha. They together will run my portable air compressor.
Sure. Sure. I could have just bought a Honda 9000 Inverter-Generator first. Did not have the money and my she-bank would not approve a honey we need this $ grant.
So horsepower, KW, kWh depends on who’s asking. And for what purpose.
Sure sound just like another lawyering, mealy mouth Clintonese, doesn’t it. “It depends on what the meaning of the word ‘is’, is.”
It is because of electromotive dynamics.
Start with a supply Grid with a huge depth of surge capacity. Your house full out individually is a percent, of a percent, of a percent, of a percent, of that systems capability.
DIY home power you’ll never, ever match that depth of capability. So do not use their numbers.
Then the add together all of your appliances ratings will still will not give you the information that you need.
For three basic reasons. You do not operate them all at the same time. And every single one of them will change the real power they will need from cold not operating. To warmed up stabilized operating. To loaded operating. To power starved operating.
Opps. A fourth reason - those plug in heaters actually do cycle off and on. Refrigerators, freezers, AC units, and others the same. They cycle with needs demands.
So as jack-legged as it sounds for us individuals it makes sense to just do something. Anything. And work up (or down) from there.
Down? You say. Yes. Just be the guy with the old gifted, scrounged, bought for a song, great name brand big’un that gobbles power and fuel.
400-600 amp welders. Three phase. You got for free haul-a-way. Worse. You spent money to get it.
20 and 30 kW big trailer industrial 6 cylinder, water cooled propane/natural gas generators.
10 and 15 kW Detroit Diesel, or Perkins diesel industrial generators.
Now fuel these even on woodgas. Repair those expensive diesels.
Starting small. Knowing this is too small will focused you on real power uses. Circuits separating out for usages. Prioritizing usages. Get your household to really understanding loads managements. Loads shedding. Loads scheduling.
Only then add, and build up. A step at a time.
Live-in RV folk learn this. Live-on boat folk learn, and live this.
Ha! You want to turn my house into a self-sufficient habitat, floating in a sea of personal freedom. Think this way. And then step by step work towards that.