You want to do the right thing and install an alternative energy system in your home, but you’re not sure whether a wind or solar powered system is best for you. There are many factors to consider, such as initial capital outlay, space, maintenance costs and efficiency. But what it basically boils down to is the consistency of your local weather patterns. If you live in a sheltered cove or valley then there is no point in splashing out on a wind turbine. If you live in a veritable wind tunnel then a wind generator might be the way to go. Certain places are more suited to solar power. Take the central South African region for instance, the area has more sun than just about anywhere else on Earth.

Ok, so it’s not as simple as basic geography. The size of your estate is also important. Wind turbines are neither small nor unobtrusive, at least not if you want one that will deliver its money’s worth. Smaller turbines with smaller blades will not provide as much energy as larger systems. If you want to make the most of the windy conditions, you’ll need the room to erect a decent sized wind turbine and you’ll have to make your peace with the fact that it won’t add to the aesthetic of your property (although it will add to the property value).

Solar panels, on the other hand, can fit onto your roof; you even get roof tiles made out of solar panels these days, so they take up no room at all. Designers have also taken looks into account and made solar panels much more attractive than they used to be.

Now you know where you stand in terms of prevailing climate and available space, what about capital outlay? Solar and wind power systems have come down dramatically in price over the last year or so. It’s possible to get a basic residential wind turbine for as little as R5,600 but they can go all the way up to R70,000. It’s possible to get basic solar power kits, which contain everything you need to get your solar power system going, for as little as R1,200. Individual solar panels start at around R570, but these are very small. Larger varieties usually start at around R2,300.

With regard to maintenance costs, solar panels tend to require less maintenance than wind turbines, which are more vulnerable to wear and tear and are exposed to the elements.

In terms of efficiency, various studies have shown various results. And results seem to be dependent on who funds the studies. It’s no surprise that those with a vested interest in wind power will find that solar power comes in a meagre second and vice versa. Here you might want to look at the quality of the products you buy (which will also be affected by price), the size available and your energy saving goals. Conduct your own research and talk to professionals, but remember to take everything with a pinch of salt.

Both systems will pay for themselves within in a matter of years and with the rising costs of electricity, the pay-back periods are getting shorter all the time.

Objectively speaking, and if you can afford it, the best alternative energy systems use solar and wind power, as they augment each other. But if that is not an option, many experts recommend solar power for residential use. Solar panels are able to gather energy even in weak sunlight and overcast conditions and solar batteries will store excess energy until needed, while wind turbines need a minimum wind speed of 9km/h to operate effectively.

When it comes time to decide, the most important factor is often initial cost, and with that in mind, solar power seems to come up trumps.