Choose a solar panel that has a good pedigree. They will have a good track record and have been made with quality components. You want a panel that is going to work the best, absorb the most and perform at its maximum for the longest. Big name brands such as Bosch, REC, Conergy and so on are adverse to taking risks and take their warranties very seriously because they run a quality business, producing top quality solar panels.
There are many quality Asian manufactured panels on the market today as well. They can cost 10% and sometimes even 20% less. However ‘Chinese solar panels’ have been given a bad name because cheap quality. Although this can be true, there are definitely some quality solar products coming out of China and other Asian countries.
The equipment for these is usually still imported from Europe or the USA but more importantly there is very strict quality control within the manufacturing process. TUV and IOS standards are important to these companies and as a result they back up their warranties with European insurance companies.