NIGERIAN and German companies signed two accords in Berlin that include a $500 million renewable energy pact and a gas export deal, further strengthening economic ties between the two nations, a presidential spokesperson said. Union Bank of Nigeria and Germany's DWS Group signed a memorandum of understanding (MoU) on renewable energy. The agreement seeks to harness $500 million in investment in renewable energy projects across Nigeria, mostly in rural communities, spokesperson Ajuri Ngelale said in a statement. A second MoU on gas export partnership was agreed between Riverside LNG of Nigeria and Germany's Johannes Schuetze Energy Import AG. Under the…