Global Law firm Ashurst has advised AGL Energy Limited on its end-to-end contractual suite for the customisation of Kaluza Ltd's energy billing platform, the migration of AGL's customer base to the Kaluza platform, as well as the acquisition of a 20% equity interest in Kaluza. The cash consideration to be paid by AGL for the equity investment is ~AUD$150m, valuing Kaluza at ~AUD$750m.