Yeah, we will see. My intent is short term use on rare occasions. Not as a daily driver.
I have a big UPS that will run just my network for 40 hours. I want something for a CPAP and cordless phones.
To date, power outages here have been rare. Maybe 3 time in the last 5 years. Last on was 10 hours, others less.
When I was turning wrenches for a living, I bought all SnapOn tool. These days I buy things that will work for a single job…
Looks like most utility program have some sort of assistance with battery backup especially if you have a medical condition such as need of a CPAP. PGE provides a free backup battery. and SCE also do something similar if you are in california, so look into it. Otherwise I think home depot has the best price for the 2048wh (2 batteries) for $1000
THX, I will check. But frigging Xcel Energy probably doesn’t do it… or charges an arm and a leg.
When it get the one I ordered I will have 4 of them. Two 500 Wh, One 600 Wh, and the 999 Wh one. So maybe 2600 Wh.
But really, even buying cheap, it cost more than the one that you mention. Even with the capacity, they don’t support the high load, but I don’t think that I need it
Penny Wise and pound foolish??
But it does give me the flexibility of using them in different places in the house.
I also picked up a Renogy 200 watt suitcase panel kit. SO there is that.
With my very cursory research, ultimate dream is to have a Tesla power wall which can run the house for a few hours.
Perhaps there’s a similar product that is priced more competitively (or uses LFP cells which would last longer)…
That would be real nice… but $$$$$$$
I doubt if the OP wants to spend that to run a hair dryer… 
I want something that is portable, so i can go camping with it to use my cpap also. The powerwall, or any unit tied to your main home is complicated, as you can’t run juice w/o some sort of safety to prevent back-feed when power is out and electrocuting the electrical worker outside. I simply don’t want to mess with that, and don’t think anyone that’s not an electrician by trade should either.
LFP price should likely drop since the patent expired and market is adopting it. Are the powerwall using NMC? I guess it is fine, since tesla trust NMC in their cars and had many reporting over 10 years of use degrading less than 50%?
yeah just watch out and don’t end up developing a hoarding problem on batteries 
also, they don’t last forever, so quality vs quantity is an important balance too.
1 Thank
Umm I had a bit of a rant yesterday went to see the doctor this morning he didn’t have a strong enough medication so referred me to a vet.
Understand about the dollars and one reason I went to China is because I had a budget and a mission after the power industry made me redundant. that budget went a lot further if I could save 75% on what I was originally quoted in Australia. I will resist the urge to rant again. Perseverance eventually paid off now I am in the process of building the system I could not afford before.
The first part of my house that went off grid was the lighting circuit, a power outlet for the TV and phone torch chargers. I found that it was business as usual with a 12v 100ah lithium car battery and 350w pure sine wave inverter. The battery was charged from solar array in parallel with a grid tie inverter.
My coffee machine uses 1.9kw and It gets a lot of use so. Idea was run it on 18v makita batteries. No inverters were available so I went 10S for the available inverters. A 30calibre ammo box of 60 30Q would give me 6 shots and heat 3 lots of milk. To build a battery it can start with some cheap 18650s.
From what I gather is special about the Powerwall and associated “gateway”, is the ability to run the house from the battery when the grid is out ,as it acts as an isolator. Other batteries don’t advertise this feature, nor do parts available to DIY, so maybe Tesla has cornered the market. Hopefully in next 5 years or so there will be something viable that’s a little less money.
I believe the Power wall is NMC. Didn’t know about a patent on LFP, I’ll have to look into that, thanks.
Point taken with portability- one of the reasons I’m with my partner is her practicality, a hair towel would be her solution, so long as a hot coffee is on offer 
What’s the power draw of the CPAP? Lowish I guess?
Edit: during my rambling I forgot to add there are boards that allow you to use matched, loose 18650 cells in series/parallel sets to build a larger battery- the DIY power wall guys seem to use them. Not sure if invented or just strongly marketed by someone called Jehu Garcia. I’ve no idea how good these things actually are, as I’ve not yet done any digging on reviews.
The power brick is rated at 90 watts. Maybe 50-60 watts continuous.
Yes, running house on battery is nice, but it does require more electrical knowledge touching your AC system and probably should get a permit and all so your house is covered in case it burns down for any cause. That is nice to have if you can do that for free. For me, its another cost. I don’t think tesla cornered anything, there are many brands selling integrated solar solution using their own batteries. Enphase is my solar and they are very comparable to tesla at a high level, sort of like apples to oranges comparison when it comes down to software. Price wise, its a bit of a mystery because you HAVE to factor in installation cost, optimization loss, your resell value, brand preference, so forth. Again, apple to oranges comparison in details.
portable, on the other hand is trying to solve the electrical need problem differently. point of use, truly only use as you needed, rather than powering frivolously