No, it isn't easy. In fact, power will be the key limiting factor preventing the early and/or easy (much less cheap) attainment of permanent presence on Mars. Solar flux is half that of Earth's, meaning that twice the mass of solar arrays have to be soft-landed on a planet with twice the gravity of the Moon, so evaluate that multiplicative factor of four by the rocket equation. It's ugly.
Nuclear could provide the requisite power levels, except that a space reactor of appropriate size (10 megawatt-class) does not exist -- and won't for the foreseeable future.
Or, soft-land something that will make solar cells using silicon from the Martian surface. We don't have such a thing now, but we will.