One of the major reasons householders are resistant to installing solar panels in their homes is our notoriously changeable climate. After all, if you live in a country where the sun can't even be relied upon to put in an appearance during the spring and summer months, what is the point in relying on renewable energy from the sun to cut down on fuel costs?
However, solar panels still work even on the cloudiest day, as a considerable amount of ultraviolet light will still get through. The efficiency may drop to as little as 10 - 25%, but if you stop to think of the times you've sat outdoors on a cloudy summer day and still got a light sunburn, you'll realise that there is still solar energy to be stored up, even on dull days.
Any energy savings will be calculated over the course of the year, not just on sunny days. Even if you live somewhere not necessarily celebrated for long, hot summers, it's more than likely that installing solar panels will still make sense for you in terms of energy savings.
If you're not already convinced - especially if you happen to be reading this whilst looking out of the window at a grey sky - then consider the interesting phenomenon of the Edge of Cloud Effect. This occurs on those all too frequent cloudy sun days - the edge of the cloud has a magnifying effect on the sun, and gives a considerable boost to your power reserves. For temperate climates where cloudy sun days are common even in autumn and winter months, this can be persuasive in giving consumers the information they need to realise that solar panels on their homes are a cost effective and energy efficient idea.
Not all homes are ideally suited to solar panels, so it's always worth getting an expert's advice, and doing your own research first - things you may wish to consider are whether you will be having your roof replaced over the next few years, or whether your roof is ideally placed to pick up maximum sunlight.