From Bloomberg, I read that the new Powerwall and PowerPack battery offerings announced last week by Tesla Motors may not be ideal for solar systems installed on your house. The 10 Kwh version of the PowerWall battery can handle only up to 50 charging cycles per year, and are not expected to be sold by solar installing companies this year, including Tesla's sister company, SolarCity. Additionally, the 7 Kwh version of the PowerWall battery only delivers a continous charge of 2 kwh, which is only enough to power a small window unit AC, or a vacuum cleaner. No more. Apparently, the battery capacities do not match expectations. It may require a lot of fine-tuning by Tesla, and significant scale improvements via its Gigafactory, to sell a product that truly acts as a viable storage unit for a residential solar system.
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