Solar power can be expensive to switch over to all at once, but we should take responsibility for our carbon footprints. Commercial power often increases the burning of fossil fuel such as gas or oil, so if we can reduce our dependence on commercial power we will have made a positive environmental step. Notice the word reduce. Moving away from commercial power all at once might be cost prohibited for most people. But, any partial conversion to solar power is a plus, and should be taken.
A partial move to solar power is best achieved if the steps we take can continue to be used should we go more fully to solar energy. Some things are stand alone units that individually utilize solar energy. Having any of these installed will not be wasted should a decision to more fully convert to solar energy be made in the future.