How to Pick Out the Proper Solar Panel
- 1). Understand the different types of solar panels. According to the Renewable Energy Trust, monocrystalline silicon panels are the most efficient option, but are also the most expensive. The more efficient a panel is, the more electricity it can produce per square inch. Polycrystalline units are more affordable than monocrystalline units, but are also less efficient. Amorphous silicon is the most affordable type of panel, but is also the least efficient of the three options.
- 2). Determine the required output for your panels. The amount of electricity a solar panel can generate is measured in terms of kilowatt hours per year, or kw/h per year. Add up the total kilowatt requirements for all your applicable electrical requirements and choose solar panels designed to provide that output.
- 3). Compare the quality of each panel design. Because panels are almost always installed outside, they must be able to withstand exterior elements like rain, wind, snow and ice. Look for units made from galvanized steel or aluminum to minimize the chance of rust or corrosion. Make sure each panel has a water-tight casing to protect delicate electrical components, and check for stainless steel or aluminum fittings to ensure the panels will stay safely where they are installed.
- 4). Check to see how each type of panel is installed. Some solar panels are meant for rooftop installation, while others are mounted on racks at ground-level. Compare your yard and roof design to the mounting requirements for each panel when making your selection. Keep in mind the size and weight of each panel to ensure they will fit safely on your roof or in your yard.
- 5). Review maintenance requirements for each type of panel. Roof-mounted units are generally more difficult to access and maintain, while ground-level units are more easily accessible. Check to see how often the manufacturer recommends cleaning and maintaining the panel as well as what tasks are required.
- 6). Evaluate the total bottom-line cost of the panels, not just the upfront purchase price. Add up the price of parts, labor, installation and annual operating costs, then divide this figure by the kw/h per year. This will give you a unit cost for each kw/h of power provided, which can allow you to make an apples-to-apples price comparison.
- 7). Compare warranties for each type of solar panel. According to HousingWatch.com, most quality panels will come with a warranty guarantee that the panel will produce 90 percent of its rated power after 10 years, with 80 percent power provided after 25 years. Look for warranties that meet or exceed this standard to ensure you are buying a quality product.
