Smart metering firm Cyan Holdings PLC (LON:CYAN) sparked up to be London's top share riser as it revealed it had won a £10mln order to supply its products in Iran.
It comes after an initial purchase order and a period of live demonstration and was awarded by telecommunications contractor Micromodje.
The deal is significantly larger than any purchase order so far by Cyan and marks a step change in the group's commercial progress.
Micromodje said: "During the pilot deployment of the Cyan solution for smart metering of street traffic cameras last month, we were able to quickly confirm the quality of its solutions as well as the support Cyan provide to local implementation partners."
The order is for both Cyan's CyLec Advanced Metering Infrastructure hardware solution and its proprietary Head-End Software.
Significantly, the 360,000 units will be installed for customers that represent an estimated 25% of total national power consumption of Iran.
Cyan's executive chairman John Cronin said: "This is a transformational point in Cyan's development.
"Not only is the order ten times larger any previous orders we have received, but this Iranian order also marks Cyan's entry into a new territory and demonstrates the compelling value of the Cyan solution for the Iranian market and emerging markets globally."
Shares surged over 122% to 0.30p.