Once a solar system has been installed it is possible to run a wide range of appliances, a common mistake people make though, is they over estimate the amount of energy that can be produced by a solar system, and under estimate the energy used by the various appliances. It is often wise to discuss what you want out of a system with people who do it for a living.
In full sunshine for example a 250 watt solar panel can produce about 15 amps at 12 volt. In overcast weather the same panel will only produce about 2 amps and 12 volt, so the input of the solar system is variable, yet the output (consumption) might go up in bad weather because everybody goes inside to shelter from bad weather and usually, they will turn on the lights and watch TV.
With this variability, the key is to store the energy harvested on sunny days in large battery banks, so it is available for you on cloudy days.
Below are some of the components that we use when building a solar system, contact us, we are happy to advise.