So as mentioned last week, Tesla announced their Tesla Powerwall home battery system. The Powerwall is a battery system that can be installed on the inside or outside of your home. It's designed to be paired with solar panels, charging during the day when solar energy is the highest but usage is relatively low, and then discharging during the night or morning.

 The Powerwall helps create a sustainable home, as it balances out the load on the power grid throughout the day, reducing consumption during peak periods, which in turn helps curb carbon emissions. 

It also can save a home owner money, as the Powerwall can charge during off-peak times at a lower cost, and then deliver off-grid power to your house during the more expensive peak periods. 

The entry level Powerwall is a 7 kWh unit that will cost $3,000, but there's also a 10 kWh model available for $3,500 (plus installation costs). The units are around six inches thick, four feet tall, and three feet wide. All units will come with a 10 year warranty, and better yet, up to nine units can be stacked together to create a battery as large as 90 kWh. A business-grade battery called the Powerpack will also be available, which will start at 100 kWh and scale "infinitely" to power packs beyond a gigawatt-hour.

Tesla Powerwall home battery system starts at $3,000