Tesla’s home battery is so popular it is sold out until 2016. That’s evidence of a strong demand for solutions among homeowners. The grid, however, may not be affected as much. If a house is only using the battery to store grid power for off-peak use or during outages, the grid doesn’t change much. If a house is using the battery to store home solar system energy and is self-sufficient, the house can be off the grid already. If a house is using the battery to store home solar system energy and sell the excess to the gird, then the grid still has to be there. There will be changes, but they won’t be revolutionary based on today’s technology. The Tesla battery may, however, be an example of an enabler that amplifies the benefits of future technologies. That milestone may be the greatest significance.