Polish construction company Erbud is a key subcontractor for civil works on the two onshore substations being built at Pęplino for the Bałtyk 2 and Bałtyk 3 offshore wind projects. Erbud is performing construction works under Hitachi Energy's turnkey substation delivery contract, handling the civil engineering and building works for the onshore substation infrastructure that will receive power from the 220 kV export cables and transform it for onward transmission via 400 kV underground cables to PSE's Słupsk Wierzbięcino substation.