Comment by IshKebab

Yeah, w/o grid fallback, I’d much rather aim for 98-99% w/ solar and have an alternate source to close gap, rather than aim for “five 9s” on solar+batt. It’d take a lot to talk me out of a multi-source approach.

The AMC White Mountain huts have been doing this for years. The croo don't tend to maintain the systems, so I've never gotten a sense for what their storage capacity, generating capacity, and loads look like, but from a visitor perspective, the system works well.

Reportedly, even the fairy stout wind turbines they use up there have short, brutal lives. I heard the story of a croo that had to lasso/tangle/jam the blades of theirs in a storm because it lost the ability to control its speed and the alternative was letting it overspeed and possibly tear itself apart. They aren't large in diameter, but at the speeds they turn even in normal conditions up there, catastrophic failure could be really bad.

If you wanna spend 2-3x more, yes. Otherwise solar or grid battery is cheaper.

you have personal hydropower? that sounds pretty cool

Woodgas would work as well

" but not the current generation chemistry batteries."

Check for "Saltwaterbatteries", they are starting to reach consumer markets and literally cannot burn as the energy is stored as ... salt water.

Yeah, I'm not saying it's a good idea. But you could do it if you wanted to.

LFP should be about as safe as other stuff people tend to store in their basements.

Most grid-scale batteries that large will have bigger inverters (usually it'll be inverters that can dump that energy in 2-6 hours so 500-150 KW for 1 MWh of battery) and require cooling systems and such, but if you're putting that in your home then cooling will be negligible and the inverter will remain small. The batteries themselves are fairly compact, it's the support systems that get large.

What's the degradation cycle on batteries that size?

If you're using daily, do you get... three? five years?

Looks like - https://cartroubleshooters.com/how-long-does-a-tesla-home-ba... - ten to fifteen years with a guarantee of 10 years at 70% from Tesla

We can roughly estimate lithium ion batteries as 500 watt-hours per liter. Which makes a million watt-hours 2000 liters, which is two cubic meters. Add in extra overhead and it's still not all that much.

Tons on this channel https://www.youtube.com/@WillProwse

EVs cost ~$2 to charge a day for an average amount of driving.

The cost for AC dwarfs the cost to charge an EV.

My bill was €316 bimonthly at €0.31/kWh before I put in panels. Last bill covering the two sunniest months I've ever seen in Western Europe was €100 exactly, of which in excess of €50 was the standing charge that is due regardless. The remaining ~€25/mo overage is the delta of our demand and the inverter's peak output. Next purchase will be more panels; another inverter would offer only marginal gains.

Fuck. This is what I get for posting on 3 hours of sleep. My hallucinated bullshit came out so close to actual that it looked correct enough.

3.2v nominal per cell, 305Ah capacity: .976kWh per each. Call it .98. Not 980Ah, but 0.980 kWh.

.98 * 22 = 21.56kWh total pack cap.

*0.6 = 12.936 kWh available before conversion losses

We burn about 11kWh daily, so there's about a day in a full battery. Spring/mid summer worked well, but lately we aren't managing to store enough to get through the night, so I will probably add another 10 panels (5s2p) once I can find a grand I don't need.