Grid Tie Inverters
Grid tie inverters (or GTIs) are a special kind of DC to AC power converter that is used primarily for renewable energy applications. These inverters are used to supply power to the utility grid, which can then be sold back to the electric company. If a GTI system supplies 500 kilowatts to the utility grid during a month, and 100 of those hours are used, the GTI system would be compensated for the 400 additional hours. This system of net metering policies will vary depending on where you live and what jurisdictions you are in.
There are many grid tie inverters available today. Each uses different technology. They may be using the most recent high frequency transformers or more traditional low frequency transformers. Some don’t even use transformers. High frequency models use a computerized process which involves several steps to convert power from DC to AC to high frequency AC and back to DC to AC at the desired output voltage. Although the process of these complex machines is difficult to understand, it can be explained with the aid of a schematic.
Grid tie inverters that don’t use transformers, on the other hand are lighter and more efficient than those who do. They are more popular in Europe because of this. They have not enjoyed the same popularity in the United States. This is due in large part to the fact that all solar-powered electric systems must be grounded to ground. This is impossible with transformerless conversions. The energy created by transformerless grid tie converters can pose a problem if it is fed into the power grid.
There are a few things you need to remember before purchasing grid tie inverters
This figure gives an indication of the output power rating for various voltages. It can be expressed in watts or megawatts. Peak efficiency is the maximum efficiency the device can achieve.
Maximum input current The maximum amount of direct current the device can use.
The start voltage value is not always listed in data sheets. This value tells you how low the DC voltage is required to get the device to turn ON and start working.
The NEMA rating indicates how protected the device is against water.
Enphase is a company that you should consider if you’re looking for grid tie converters. Enphase offers many of these devices that are especially suitable for solar panel systems. These devices can be costly, but if you shop around you may be able to find them for a significant discount.