Tesla Megapacks are about to replace Hawaii’s last remaining coal plant

[kalianna]

We have a Tesla Powerwall.  Solar energy first goes to the house, then to charge the battery and then to be sold to Helco.  If power goes out during the day, it doesn't affect the system since we're drawing energy from the solar panels.  If the power goes out at night, we're running off the battery.  We've never run out of battery at night when the grid was down, though that could happen if it's been rainy and battery wasn't charged enough.