Be realistic about the costs of having a solar energy system. If you're paying much less than other systems that are around the same size as yours, you may have poor equipment or installation work. Like with many things in life you get what you pay for. Quality installation work and equipment isn't going to be cheap. You may have substantial savings by going with a large company, but other companies may be cutting corners to keep costs down.
It is vital that the person who installs your solar power system is actually licensed to do so. An installer who is not licensed may install your solar panels incorrectly, or they may violate local regulations. In addition, a licensed installer can provide you with great information about these regulations that an unlicensed installer cannot.
Try using a clothes line to dry your clothes. This is an older idea that works just as well. Rather than drying clothes in the dryer, hang them outside on nice days. This will save energy, which in turn will save money.