An investment in solar panels gives you long-run savings, plus it’s good for the environment. If you are in the market for solar panels, here is a quick guide how to choose the best solar panels.
Size of the panels
The bigger the panel size, the more power you can harvest. However, you have to consider how the panels will fit on top of your roof. Your panels should not be too big or too small in relation to the size of the roof.
Before you buy, it’s essential to measure the dimensions on the part of the roof you want to install the panels. Remember to consider which side of your house receives optimum sunlight.
It’s also essential to think about the size versus the output of the panel. Buying a bigger panel with a low output means you won’t have any more space to upgrade your solar system. If you don’t have all the money right away, instead buy more efficient panels of a smaller size and add more panels later.
Solar panels work by converting the sun’s energy to electrical power. More efficient solar panels convert the most amount of energy in the least amount of time, with minimal wear on the panel cells.
You will need to ask about the panel’s efficiency when you buy. The solar efficiency of a good panel should not be less than 15%. Go for solar panels that have an efficiency of over 20%; they are a worthwhile investment.
Solar panels will often come with a certification that shows the testing the panel has gone through. For instance, a solar panel marked TUV IEC 61215 indicates that an independent party has tested it.
How long they last
An investment like a solar panel needs to last you for a long time; replacing your panels constantly will not be cost-effective. Go for solar panels strong enough to withstand the elements.
Ask the supplier about the wind, snow, debris, and hail protection of the panels. The best solar panels are usually the ones that are certified for all factors.
The mounting also affects the durability of the panels. Therefore, you should request the supplier about the strength of the reinforcement before you buy.
Check the warranty
A reputable supplier should provide you with a good warranty. Manufacturers often offer warranties for 10 to upwards of 25 years, depending on the product.
You will also need to ask about the performance warranty. It’s essential to check the track record of the supplier. Buy only from suppliers with a track record in the solar business who are more likely to still be there to honour the warranty in the years to come.