Grid-scale battery developer Primus has now raised $60m in equity after closing a round featuring existing backer Anglo American Platinum.

US-based energy-storage technology provider Primus Power secured $25m on Wednesday in a series D round led by I2BF Global Ventures that included platinum mining company Anglo American Platinum.

The round also featured venture capital firms Chrysalix Energy Venture Capital and DBL Partners, and Russia-Kazakhstan Nanotechnology Fund, a fund managed by I2BF.

Primus produces modular zinc bromide batteries that can store energy captured by renewable energy plants at grid-level. It signed an agreement in May to ship 25 MW of batteries…