Just like a power jack inverter, a grid tie inverter too needs professional assistance. Do not try to set it up on your system as you may end up doing more harm than good. Besides, in matters of electricity, it is better not to dabble if you do not possess adequate knowledge. An inverter fitted with a wrong appliance may even damage the appliance due to over-loading. So, it is a precautionary advice that you must call up a professional after you buy grid tie inverter.
Since these inverters are available online and at affordable rates, there is no reason why you shouldn’t buy one right away. Overall, they may require a small upfront investment but they will help save you lots of bucks down the years.