22 July

I ran the diagnostic on the Powerwall today, it’s heading towards nearly 2 years of use. Battery degradation in those nearly 2 years? (Warranty is for it to have 70% capacity still after 10 years.) Degradation so far is 0%. The Powerwall performed beautifully yesterday with the grid outage all day. Wouldn’t have known there was even a blackout, inside, life went on as normal, and the solar not only provided extra power but also re-charged the Powerwall as we used it. Batteries don’t just store energy. They turn your house into a micro-grid, which can function separately to the main grid if needed, like in blackouts. Without a battery solar panels won’t function, if there’s a blackout, they turn off to prevent electrocuting line workers.