Last judgement's fire series

"Thirty years ago, the world ended. Giant electrovoric ants and pterodons came through a rift in space-time, millions of humans died, and that was that. Thirty years later, humanity has rebuilt . . . to an extent. Without electricity, human ingenuity has provided some creative solutions, but most folks survive at the subsistence level, farming to keep themselves and their families fed. Chuck Gibson never thought he'd have to leave his family's farm....