$15k for only 13 kWh is not a sustainable price point.

A high quality Victron inverter set for 3 phase is around $2500, that's not a budget option but one of the better inverter brands you can find. Add $2000 for a 16 kWh battery and you're done for less than 1/3rd of the price of the Tesla solution.

I agree they are expensive, but IMO their software is worth $1k.

Safety and quality in $2k battery is just not going to be there. That's bottom of the barrel. Quality batteries cost roughly the same.

I got two Tesla Powerwall 3s partly because I thought the software would be better. Instead, they are extremely buggy and the software has poor functionality. Many of the features are broken. The product feels like a prototype. Grid charging is broken and many of the features related to it don’t do what it says in the app. The batteries regularly do calibration cycles where they dump their entire charge and then stay at 0% charge level for at least 24 hours. When I first got them about a year and a half ago they would do that about once every two weeks, although they have reduced the frequency. I’ve also had issues with them turning on their heaters when it isn’t even cold and draining themselves. You get little to no insight into their operation and need to contact technical support for any little issue. They crash and do a hard reset and shut off the power every so often as well.

Sounds like the software is worth -$10k!

Paying a tesla tax to waste extra power AND not be sure they'll be charged in the event of an outage - quite a combination! Thanks for putting this review out there - its a good counterpoint to all the hype!

it's not bottom of the barrel.

You can build a 16kWh lifepo4 for ~1800$: https://www.mobile-solarpower.com/server-rack-lifepo4.html

That gives you some experience so you'll be able to maintain it as well if any cell goes bad.

Look I DIY'd my battery too. Thats not comparable to buying high end solution.

I'm curious what you mean by high end solution and how that's different.

In my mind it's similar to premade computers vs build your own. Tesla would be something like Lenovo/dell here.

They would just grab the same cells or cheaper and some other off the shelf components and sell them to you at massive markup.

And you get situations like Battleborn where they couldnt even do the connections right and would start a fire by default...

Will build my own as well this summer so really curious whats the best way to do this

It's more like buying ozempic from india and mixing it yourself vs paying for real one

I also have built my own offgrid sytems, but sodium is here now, and lithium is not competitive in any metric that counts in a static instalation especialy cost per kw/hr, and will very likely get insured to death as it will never be as safe. My next system upgrade will be aimed at home power/heat/hot water, shop, and car charging.Possibly with the car charging bieng a discreet system that works at a higher voltage and is all DC.

I understood LiFePo4 is pretty safe and innert.

Sodium I saw some reviews where it expands a lot during charging and long term safety is not as conclusive

Why do you see sodium as an easier choice?

The main fire risk with lifepo4 is the connectors, wires, bms and shut off being suitable for high amp. That would be a risk with anything if not built properly, even without batteries if you wire your house with wrong awg wires

lithium?, in a word, dendrites

then if you can stay under long enough, the look into electrolights, this is all uni 101 stuff, but it is very clear that lithium is dead for static applications, and lower performance mobile

other words, cost, supply chain strongly favor sodium over lithium

well, thanks, there goes the home battery idea :)

Sodium is not here yet at all.

CATL barely started (if at all) volume production. They haven’t even published specs. Even when they ramp it up, it will be like 0.1% of total lfp output.

So no, sodium is nowhere near.

you, blinked.they are selling sodium cars, and have giggawatt factorys online, with a bunch more coming online this year.

Name 1

previously, here....,blink, blink

https://electrek.co/2026/02/05/first-sodium-ion-battery-ev-d...

and in typical China fashion you can bet that actual implimentation is going to scale at a ferocious pace now that first iterations are proving competitive..... then we could, but wont, get into other significant developments in electric power, solar, battery, etc that will be entering the market, at scale, this year wink wink

Yes, they've gone back to the traditional physical turn stalk.

Yes. Traders are involved in all kinds of deals that aren't like index funds.

But the companies selling them chips are also their shareholders, so those are on the hook as well.

You would hope that an EV reporting x kWh/hour considers the charge curve when charging for an hour. Then it makes sense to report that instead of the peak kW rating. But reality is that they just report the peak kW rating as the "kWh/hour" :-(

I find it amazing that anyone still uses Salesforce. They were innovating in their early days, but it has been legacy bloatware with more marketing than engineers for a decade now.

$40bn

High revenue to active user

That could also mean captive customers + maximum extraction in the legacy phase of the product portfolio. Doesn't necessarily mean users are happy with the product and customers aren't looking for alternatives.

I thought they were interconnecting all those ideal-like systems from different countries and then rebranding to Wero? So the tech may be different per area but they all interconnect and the UX is the same.

But maybe I misunderstood and other places are actually replacing tech.

Even older electric stoves are fast at control as long as it's an induction and not basic electric.

"That's a great idea! Do you want me to create a PRD, a million markdown files and some useless Playwright tests?" -- Claude

... and you don't have token credits anymore.

I've done business the other way around, Western Europe with Finland. I think it's just different context? There are unwritten customs and meanings in Finland as well, just different ones.

Even UK vs Netherlands is a significant difference in how things work in business deals and that's just a 45 min flight. Unspoken expectations are different on how the other side is supposed to behave.