Yesterday Tesla unveiled the Powerwall 2 and the Solar Roof.
I think that the Solar Roof is more of a fashion thing, regular solar panels look great to me and are easier to install than hundreds of tiny solar cells in the form of roof tiles. But the Powerwall 2 is different, it’s really revolutionary regarding home energy storage. Not only it’s more affordable, is also easier to install than regular energy systems.
The Powerwall 2 has a Liquid thermal control system, so we don’t have to worry about cooking the battery in hot climates nor poor performance in cold places. It also has an internal DC/AC inverter, this saves us money in extra components and it also makes the installation a lot simpler.
For a price of 5.500 USD, about 5.006 €, let’s see what we get.
Now compare to the first generation Tesla Powerwall.
Don’t forget that now, not only the Powerwall 2 has more battery capacity, it also has an integrated AC/DC inverter. This makes it much better than the first generation.
In May Nissan announced its Powerwall alternative, the xStorage, that has a 4,2 kWh battery capacity and costs 4.000 € – with installation and cables included.
When these energy storage battery systems get even cheaper they’ll make easier the job of building a DIY electric car in your garage. Instead of using the battery on the wall, put it inside an electric car you just made. Then you’ll have energy storage on wheels.
The Volkswagen Nils powered by a 20 kWh battery that could also supply the grid would be the ultimate Powerwall on wheels. This is exactly what a Vehicle-to-Grid (V2G) system does and it would be awesome if the Tesla Model 3 gets this feature…
Tesla Powerwall 2 is now being built in the Gigafactory and first deliveries should happen in December in places like California, the rest of the world needs to wait a little longer. But it’ll worth it.
What do you think? Would you rather have an energy storage system on your wall or integrated in your electric car? Or even better, why not both?!