Northumbrian Water has followed its new green energy supply deal with renewables giant Ørsted by revealing plans for 10 new solar farms at its sites across the region. The company announced yesterday it has teamed up with solar specialist Lightsource BP to work on plans to install and operate 10 ground-mounted solar farms at its water and sewage works. The companies said the projects are expected to deliver up to 10GWh of clean power a year – enough to power more than 3,000 homes. The market for corporate solar installations has contracted sharply in recent years in the wake of steep cuts to government subsidies. But developers are increasingly confident that falling technology costs and a growing appreciation of the environmental and energy security benefits solar can bring are driving a gradual revival across the market. The latest deal comes after Lightsource BP, which rebranded late last year after oil giant BP bought a 43 per cent stake in the firm, announced it had formed a new clean energy investment fund manager in India in partnership with Everstone Group.