What is Powerwall?
In April 2015, Tesla launched its Powerwall home battery packs that can store 7 kWh and 10 kWh of electricity. Its big brother, the PowerPack, stores 100 kWh of electricity and is available for industrial consumers. Tesla received orders totaling to $800 million following the launch of the battery packs.
What is its function and purpose?
With Powerwall (and its larger counterpart the Powerpack), Musk wanted to redefine the use of energy and render fossil fuels into an unnecessary source of energy. Powerwall comes in two different models: one for daily cycling, more likely to be used in an off-grid environment; and then another for being a backup battery. Basically, it’s a rechargeable lithium-ion battery. The Powerwall would cost US$3,000 for a 7kWh model and US$3,500 for the 10 kWh model. On other hand, the Powerpack, made for industrial consumers, would cost US$250/kWh.
The daily cycle 7 kWh battery can be cycled 5000 times. On the other hand, the 10 kWh battery is for weekly or emergency use. It also has a higher energy density but a shorter cycle life of 1000-1500 cycles. Tesla powerwall is currently sold out from May 2015 until middle of 2016. 50, 000 units of the powerwall (worth US$179 million in total) were reserved within the first few weeks. Meanwhile, 25,000 units of the Powerpack (worth US$625 million in total) were reserved as well. Combining both orders, it would amount to a total of US$800 million.
By the end of 2015, Mercdes-Benz / Daimler AG is expected to release their own personal power pack for domestic and small business at the end of 2015.