Tesla announces Powerwall 3P with native three-phase inverter
electrek.co$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 $2k battery is just not going to be there. That's bottom of the barrel. Quality batteries cost roughly the same.
I got two Tesla Powerwall 3s partly because I thought the software would be better. Instead, they are extremely buggy and the software has poor functionality. Many of the features are broken. The product feels like a prototype. Grid charging is broken and many of the features related to it don’t do what it says in the app. The batteries regularly do calibration cycles where they dump their entire charge and then stay at 0% charge level for at least 24 hours. When I first got them about a year and a half ago they would do that about once every two weeks, although they have reduced the frequency. I’ve also had issues with them turning on their heaters when it isn’t even cold and draining themselves. You get little to no insight into their operation and need to contact technical support for any little issue. They crash and do a hard reset and shut off the power every so often as well.
it's not bottom of the barrel.
You can build a 16kWh lifepo4 for ~1800$: 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.