Arizona utility Tucson Electric Power (TEP) has set out plans to provide 70% of its power from solar and wind by 2035, backed up with investment in new energy storage capacity.

Realising the theoretical promise of solar-wind-storage hybrids is far from straightforward, with individual projects likely to vary considerably. Ben Willis examines some of the technical complexities of combining different technologies into a single, profitable entity.

Korean firm Kokam has supplied two lithium nickel manganese cobalt (NMC) oxide batteries to utility Korea Electric Power Corporation (KEPCO) for frequency regulation on the South Korean grid.

The US energy storage market grew 243% last year, making 2015 the biggest year of any on record for storage, according to GTM Research.

German solar integration specialist Belectric has begun serial production of its ‘Energy Buffer Unit’ (EBU) battery system.

Misconceptions over the true value of energy storage are developing because of a “narrow focus” on the initial costs of the technology, a report has concluded.

The US Department of Energy is to fund six projects trialling the combination of solar and energy storage.

Energy storage may prove to be the key bulwark against the so-called value deflation of solar expected as it achieves higher levels of penetration, according to an analyst at GTM Research.

German trade association BSW Solar has called for an extension to the country’s PV energy storage incentive programme.