A new plant, located near the village of Hothfield, Ashford (Kent), is expected to generate enough electricity to provide for 1,850 homes.
The plant is also expected to avoid the emission of 62,300 tonnes of CO2 during its lifetime.
The new plant in Hothfield adds to the 8.9MWp solar farm in East Sussex, a project announced in October.
In addition to this, in April this year, construction of a 12MWp plant began in Alresford, Hampshire.
OPDE is on track to meet its objective of connecting 100 MW of photovoltaic capacity by March 2015.