Solar Panel Dealers

When you are looking for solar panel dealers, there are some important things you should keep in mind. For example, in what concerns the so-called peak tolerance rating, also known as minimum warranted power, negative tolerance rating, or minimum power max, there are a lot of people that do not know that they can pay for 200Watt solar panels for example, and receive 180Watt solar panels. It is important to discover if the solar panel has a poor minimum warranted power rating, and in this case, avoid that solar panel. In this way, you will not be tricked by solar panel dealers, even if they try to convince their solar panel is very good and has high efficiency. When you buy a solar panel, it is important to ask for the specification sheet, and look there for the minimum warranted power rating.

The state of California decided that before being approved for the state’s program, all solar panels must be tested by PVUsa, an independent laboratory. The test conditions are more stringent than the manufacturer uses, and after testing, a PTC rating will be assigned to the product. You should know that PTC rating means PVUsa.

You should also know that if a product has a number of watts in standard test conditions rating, that number will be lower in the PTC rating. When you go to solar panel dealers, always check for the PTC evaluation, and check what the manufacturer is guaranteeing that you’ll receive.

Because standard monocrystalline and polycrystalline solar panels have life expectancies of more than 40 years, manufacturers offer warranties for more than 25 years. However, there are some of them that offer less. A smart thing to do is to check for how long the company or the solar panel dealers are in business with solar panels.

You should know that if the solar panel has a higher efficiency, it will produce more power. It is known that usually, the solar cells that are cut from solid ingots of silicon have the highest efficiency. There are also technologies that avoid cutting solar cells from solid ingots of silicon, but although are cheaper, they are not so efficient.

A good thing to do is to ask the solar panel dealers about the factory printed specification sheet, that shows the solar module efficiency, and if they don’t give you that specification sheet, you should go somewhere else to buy solar panels.

When you shop for a solar electric system, you will surely want more rebate money. For accomplishing this, a good advice is to buy the highest efficiency inverter. The inverter’s warranty is also an important fact. It was seen that there are a lot of solar panel dealers that say they give many years of warranty for the solar panel, but they do not say anything about the inverter. Five years is the minimum warranty the state requires but the longer the warranty is, the better.

You should be very careful when looking for solar panels, ask many questions, and visit more solar panel dealers, in order to be able to choose the one that has the most attractive offer.