Britain's sixth-largest array of photovoltaic panels will be helping tenants within two of the Welsh Development Agency's latest ‘green’ business units to become self-sufficient in their consumption of electricity. The two 300 m2 units are the latest addition to the Dyfi Eco Parc in Machynlleth. The site, one of Britain's first ‘green’ business parks, already boasts three other environmentally friendly units. These have been constructed using locally sourced materials where possible, combined with state-of-the-art energy efficiency measures.