GRAND HAVEN — A new investment from private equity owner Blackford Capital gives Grand Haven-based portfolio company Grand Power Systems Inc. capital needed to support growth. GRAND HAVEN — A new investment from private equity owner Blackford Capital gives Grand Haven-based portfolio company Grand Power Systems Inc. capital needed to support growth. Grand Rapids-based Blackford Capital closed in March on a $700,000 raise for Grand Power that involved four investors, according to a filing with the U.S. Security and Exchange Commission. The filing indicated the private equity firm wants to raise another $50,000 for Grand Power.