The Seamus Chronicles Books 1-4

Seamus Robinson is a teen genius. His ability to see dark energy and work with it have him weeks, possibly days away from inventing a perpetual, zero loss electricity generator when the apocalypse hits. A killer cold sweeps across the planet over night leaving billions dead in it's wake. Seamus and his family survived but are separated from his mother who is on the opposite coast with other survivors and scientists. After struggling to survive the cross country journey to re-unite Seamus and the other survivors discover that Earth is no longer safe for humans, they must evacuate the planet. Miraculously they are able to make their way to an Earth like planet but all is not as it appears. Locus, the name they have given the new planet, is being bombarded by radiation. Not only is radiation a problem, humans are not the only living creatures on the planet.