An Australian company plans to release an type of PV storage battery…
It is innovative as it uses hydrogen from water for the energy storage and a fuel cell to regenerate electricity. Whilst it is about the same size as Li ion batteries, the cost is about 3 times Li ion batteries ($34k v $12K), so is the storage capacity (40kW v 10-13kW).
These sort if systems may be beneficial when domestic storage is needed to meet future energy needs of a home and local distribution network. One might only need 1-3 of these batteries, rather than 3-9 of other battery systems. The space saving in an average home will be noticable.
