One theory in economics states that many people judge the quality of a product by its price. On that count, an expensive product is superior in quality to a lesser expensive one. But when it comes to a grid tie inverter, it is its capacity and size that make the major difference.
It can be quite tempting to opt for an inexpensive product. But if its power-generating capacity lacks adequacy, then the whole purpose of buying it shall get destroyed. So, it is vital that you opt for that inverter which will fulfill all your needs. After you have figured out your precise needs and the approximate watt of power you will require, you can narrow down the list significantly. From there on, one can look at different brands, sellers and discount options to narrow down his choice further.
So, it will be naïve to buy a cheaper inverter just because you have a smaller budget. At the same time, it may be frivolous spending to go for an expensive one if your needs are limited. For better understanding of powers and grid tie inverters, one can always research more or take help from the sellers.