Will the KVAR EC adversely effect my back up generator, solar power or any other alternative power source or visa-versa?
Nope. Your KVAR EC can not make a distinction between power sources. As far as the KVAR EC is concerned, electricity is electricity. It makes no difference where the electricity comes from so it will have no negative effect on the source nor will it be effected by the source. The KVAR EC does however have a very positive effect on the power source by enhancing the capacity of the power source because less amps and watts are being utilized.