What are the advantages and disadvantages of solar energy?

Advantages:

    Solar power gives you a return on your investment, while paying your utility for electricity gives you 0% return.
    Solar energy is renewable unlike the conventional resources (coal, oil) which will inevitably run out.
    Non-polluting, no carbon dioxide like fossil fuels
    Free except for capital expenses.
    Longevity - solar panels can last over twenty years
    Low maintenance - solar panels require very little upkeep
    Independence - an off-grid system allows you to break free from the electrical grid
    Environmentally friendly because the conversion of energy doesn't produce any carbon dioxide.
    It comes from the sun, which, unless you are in The South or North pole, comes out almost everyday
    Solar power is better for the environment, compared to burning fossil fuels and other electrical power.
    sun is renewable
    You get clean energy without harming the environment [in term of carbon emissions] ,
    in certain countries, excessive power generated can be sold back to local electricity provider
    reduces pollution
    helps create jobs - shores up economy - to build -> you hire - innovate-maintain - basically economic activities
    reduced dependence on fossil fuels
    Once installed, the power is free
    It is environmentally friendly and no pollution is associated with solar power
    You can sell your excess power back to the power companies
    It can be installed anywhere
    You can use batteries to store power for use at night
    Energy from the sun is renewable, that is, it keeps on coming
    It is free
    It does no damage to the earth or its atmosphere
    It produces no carbon dioxide
    It doesn't have to be dug up from the ground like coal, oil, natural gas, or uranium
    It doesn't have to be cut down, like wood from forests.
    It produces clean, green power in the form of electricity and can be used to power just about everything we need.
    There is more solar energy landing on the earth every day than it would take to supply the world for a year.
    Solar energy can heat swimming pools, power calculators, and power cars.
    You can even cook food with solar energy.
    We are using a renewable energy source like the sun, instead of non-renewable energy sources such as Gas, oil, fossil fuels etc.
    We can save power of electricity.
    We can prepare food with more taste.
    We need not bother about electricity board.
    solar power panels are small enough to fit on every rooftop in a city
    Solar cells last a long time, typically guaranteed for 20 or 25 years.

 
Disadvantages:

    Takes up a lot of space,
    Only works when Sun is shining.
    It doesn't produce much electricity for one single panel.
    If you were to build it on the ground, the cost will be higher [for massive area of land]
    Only areas of the world with lots of sunlight and very low heat are suitable for solar power generation
    You need a lot of money to the installation of the solar energy.
    Least power energy at night time is another disadvantage of solar energy.
    When there is no solar energy to be collected you'll have to have adequate battery backup to get you through the nights and rainy days.
    some people complain of eyesores -> * fine beautiful, great - but not in my backyard -" - well so said the folks in Maine..
    It takes a considerable amount of solar panels depending on your location to produce the same amount of electricity
    Solar cells are not efficient yet
    Solar energy is not available 24 hours a day. It can only be harnessed well when it is the strongest, that is, excluding morning, evening and night.
    Current devices which utilize solar energy are expensive.
    There is no guarantee of sunlight in stormy climate or during rain.
    Solar panels require quite a large area for installation to achieve a good level of efficiency.
    The efficiency of the system also relies on the location of the sun
    The production of solar energy is influenced by the presence of clouds or pollution in the air.
    Similarly, no solar energy will be produced during nighttime although a battery backup system and/or net metering will solve this problem.
    As far as solar powered cars go - their slower speed might not appeal to everyone caught up in today's rat race.
    If there is no sun, there will be no solar power because solar power is from the sun.
    Solar photovoltaic panels are not being mass-produced quickly enough to make them cheap
    solar power doesn't work so well on cloudy days, so they aren't suitable for every country
    Only useful during the day (unless you have a solar battery that will "charge" during the day, these add pollution to the environment)
    Procurement and Installation is expensive, but this can be helped by Federal grants that are now available
    It takes a considerable amount of solar panels depending on your location to produce the same amount of electricity
    Solar cells are not completely efficient yet
    only available for limited portion of the day (Wisconsin for example gets an average of two hours of full sunlight each day)
    limited by environmental factors (like latitude and weather)
    not particularly efficient (current technology can only extract a small portion of the energy available in sunlight).
    Solar panels do not work well in warm temperatures
    Payback is often measured in multiple decades while life span in often less then 25 years.
    Solar panels degrade with time.
    Solar Panels can not produce their full rated power. A 100 watt panel can not provide more then 80 watts in full sunlight and cold weather.
    A single hail storm once every twenty years destroys the return on investment.
    Many areas have no possible return on investment or the return is over the lifespan of the panel.