Energy Storage

Researchers in Portugal have tested how vanadium redox flow batteries can be integrated with rooftop PV to balance the system load to ensure firm power output. They proposed a 5 kW/60 kWh battery configuration for a 6.7 kW building-integrated PV microgrid. According to their findings, the battery can be used in different energy management strategy scenarios to better complement solar photovoltaic generation.

Anglo-Australian mining giant Rio Tinto’s ambition to become one of the world’s largest lithium suppliers has taken a battering with the Serbian government pulling the plug on the company’s $3.3 billion ($US2.4 billion) Jadar lithium-borates project.

Mercedes-Benz has teamed up with ProLogium to integrate solid-state battery technology into a range of passenger vehicles; Panasonic and Toyota have launched an industrial-academic collaborative research program concerned with battery resources and recycling; and LG Energy Solution plans to spend $2.1 billion with General Motors to build another electric vehicle battery plant in the U.S.

An international research team has investigated how solar could be combined with thermoelectric coolers (TECs), which are small solid-state heat pumps used either for heating or for cooling. A system was built with six solar panels, an air duct system, four batteries, a charge controller, TECs, an inverter, heat sinks, a test chamber, and condenser fans.

In the next ten years, according to Milanese consultant REF-E’s simulations, storage in Italy will mostly be driven by opportunities in the ancillary services market. After 2030, when renewables will provide most electricity, REF-E believes the price spread between different hours of the day should be high enough to cover the cost-per-cycle of energy-intensive storage. Energy expert Virginia Canazza discussed the topic with pv magazine.

The Chinese manufacturer has upgraded its commercial application battery with a dissipative balancing technology that, it is claimed, will make the storage system suitable for different load conditions. Each battery module is sold with a capacity ranging from 100 to 200Ah and a storage capacity of 7.68kWh.

The portable storage system contains lithium batteries, a charger, and an inverter, all fully integrated into a sealed and protective case.

A 100kW/1.5MWh zinc-air battery will be installed in Queens, New York, in combination with a combined heat and power system and a PV array. The pilot project is intended to demonstrate the long-duration energy storage capability of the zinc-air battery.

Growatt’s new AXE LV battery covers a wide range of capacities, from 5kWh to 400kWh, and can support off-grid systems with power outputs of 3kW to 30kW.

US researchers suggest that by 2050, when 94% of electricity comes from renewable sources, approximately 930GW of energy storage power and six and a half hours of capacity will be needed to fully cover demand for electricity in the United States.