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You want about 20kWh at a minimum to be self sufficient. We have a 10kWh Tesla battery, and it only lasts until the evening (saving 20%) for grid outage backup.
by iampivot 4y ago
You want about 20kWh at a minimum to be self sufficient. We have a 10kWh Tesla battery, and it only lasts until the evening (saving 20%) for grid outage backup.
- vardump 4y agoFor your case. Because this really depends on climate and the house. In our case, 100 kWh would be required to cover one day normal power requirements in the worst case. Median would be about 50 kWh. I could probably stretch 100 kWh for max 3 days (worst case) by adjusting temperature, using water minimally and unplugging everything that's not absolutely required. There are also households who could stretch 8.7 kWh for several days. And houses that require significantly more power to maintain liveable conditions.
- cagenut 4y agowhats the opposite of a humble brag
- vardump 4y agoMy point is one size doesn't fit all. Some places on this planet can get very cold or very hot. If you're running a [ground source] heat pump as your primary heat/cooling source, even with high COP, on extreme days the system can draw massive amounts of power. You know, those days when losing power could truly hurt. Like destroy water pipes (including underfloor heating pipes) type hurt. Or make the house unlivable hot. No bragging (I have no idea how someone could read it like that!) or anything. Just facts. There's more variability than you might think.
- bradstewart 4y agoThat's probably at "full load" for your house though, no? If you're looking at an extended outage, you can alter your use patterns. I have a 5kW gasoline generator that most certainly cannot run the whole house, but in emergency situations, I turn off most things at the breaker box. We can run one AC unit to cool part of the house, then shut down that, and power up the kitchen for dinner, etc, etc.