Swiss energy group BKW AG (<a href="https://www.six-group.com/en/market-data/shares/share-explorer/share-details.CH0130293662CHF4.html#/" target="_blank">SWX:BKW</a>) has signed ten-year power purchase agreements (PPAs) with Spanish renewables firm Zelestra to source electricity from 16 MWdc of solar farms in Italy, the companies said on Wednesday.