Ruixu 16kWh battery $2000 after credits

[ergophobe]

My nephew just got one of these to lay in a decent battery before the tax credits run out. It was $2035 delivered with the credits, $3300 without
https://www.ruixubattery.com/product-page/lithi2-16-battery-bank

For perspective, a Powerwall 3 expansion unit (so minus the gateway and things you don't need once you have a first powerwall) is about $4500 after credits and $6500 without credits for 13.5kWh

[rcjordan]

Wow!

[ergophobe]

Keep in mind that unlike the Powerwall, that's just a battery. You still need an inverter.

The Powerwall architecture was sort of stupid - the original PW had an inverter in every unit. With PW3, they sell a main unit and then you add expansion packs, so I am guessing this get rid of adding an unused inverter to every PW. I think early on, they assumed most people would buy just one, but a typical install is more like 2-4.

A nice inverter is $2000. You can probably go cheaper and, of course, a lot more expensive. Still, that means that for the price of one 13.5kWh Powerwall ($7000 with credits), you could get 48kWh and an inverter (about $7800).

Or put another way, for what I paid for my system 6 years ago, I could now have 5X the battery.

And, to our discussions about vehicle batteries, that does not mean I would have gotten 5X, I would have gotten 3X and pocketed the rest. In the same way that a car with a 1000-mile range makes no sense, it makes no sense to install 64kWh in a small house that doesn't run AC.  That would be four days of backup, which we could only conceivably use when the panels are covered in snow and not generating.