User blog comment:Stabber ApSig/Mass Relays Gone, ME3 ending/@comment-124.179.233.116-20120310114030/@comment-67.191.192.33-20120313002646

Ships (not just Normandy) build up static electricity during regular use that has to be discharged in either the outer 'atmospheres' of gas giants or at specially designed space stations. Not a whole lot of those just sitting around in empty space.