The UK’s “greenest electricity supplier” will launch trial units of its own residential energy storage system this year, with the potential to reignite an ongoing and acrimonious rivalry with Tesla.

Utility-scale solar projects in a region of Japan affected by fears of grid capacity constraints have been supplied with energy storage, aimed at mitigating the potential effects of output curtailment.

While the effectiveness of flow batteries in islanded situations is quickly being recognised, on the grid, the cost of providing that storage is still seen as something of an inhibitor to uptake. Andy Colthorpe spoke with the RedT CEO, Scott McGregor, to get his views on how flow batteries can thrive – and why lithium-ion is not the enemy.

Energy storage and interconnection are complementary technologies, as a means of adding flexibility and keeping costs down in electricity grids, an expert from Fraunhofer ISE has said.

Moves by the US’ Federal Energy Regulatory Commission (FERC) to assess electricity storage’s potential role in wholesale markets and in maintaining a low-cost, reliable network have been welcomed by the Washington-headquartered Energy Storage Association.

Roundup: A third of US PV installers offer storage and 26% more could join them this year, China’s BYD signs up with UAE’s Masdar, Sunvault and Aboriginal Power’s ‘self-sustaining’ community project.

Unsubsidised, commercial solar-plus-storage projects of the type being executed in Puerto Rico could demonstrate how to overcome many of the challenges imminent for the world’s PV markets, according to one company with experience in the field.

The output of a 16MW solar farm in Puerto Rico will be tied to an Aquion ‘saltwater’ battery, in one of the few current trials of moving solar power produced in the daytime to be used at night.

Sharp has launched its latest home energy storage systems in Japan, with features geared towards meeting changes in the electricity market that are underway in the country.

After claiming that interest in Powerwall and Powerpack was “overwhelming” and “crazy” seven months before the first commercial installations began, Tesla CEO Elon Musk announced that close to 400,000 people have reserved a Model 3, due out next year. Andy Colthorpe asks how much Tesla’s overall success in its stated mission to accelerate the transition to clean energy is pinned to a successful roll-out from the Gigafactory for the car.