Ann: Quarterly Shareholder Update, page-10

"The maximum operating temperature of the GAS-TESS heat store has now been measured at 1350°C, so the silicon phase change material (PCM) is being configured to melt at less than 1300°C and achieve similar latent energy storage to pure silicon. In addition, the combustion products from burning biogas must be isolated from the silicon PCM. The GAS-TESS is operating well utilising the sensible heat of silicon bricks and a trial quantity of lower melting point silicon PCM."

So at the moment it's not using latent heat as storage. I'll accept this as a challenge rather than an insurmountable problem but it will delay the GAS-TESS road to commercialization. I believe this hurdle is more than offset by the MoU's announced in other areas for electrically heated TESS units. I continue to hold.