Factors To Consider Before Buying Solar Inverters


Solar inverter also known as photovoltaic inverter can be broadly classified into three types. These include stand-alone, grid-tie and battery backup inverters.

Standalone solar inverter is mostly used to convert direct current (DC) into alternating current (AC). These inverters draw their DC power direct from batteries that are solar charged and transform it into AC power that is used for domestic supply and small establishments. Most standalone inverters also have an integrated facility to charge their batteries from other resources like engine generators, hydro turbines and wind turbines. As they are not hooked up to power utility grids, they do not require anti-islanding protection. Sometimes micro inverters are fixed to each solar panel separately to act as separate entities for use to small power appliances.

Grid-tie solar inverter is designed to match phase with utility charged sine-wave. These inverters are tied up with utility grids and are required to conform to the frequency and voltage norms of utility grids with which they are tied up. This facilitates the user to get continuous flow of power supply from the utility grids, even when the inverter is unable to produce requisite quantum of power. Grid-tie system solar inverters are also empowered with an auto turn off facility during times of power losses for some safety reasons. So, they cannot provide power back up during such occasions. Further, these grid-tie inverters require anti-islanding protection.

Battery backup inverters are specially designed to draw and manage the power drawn from solar panels. This type of solar inverter is capable of holding the requisite amount of power back up to maintain incessant power supply during power outages. It can easily manage the battery charge with the help of on board battery chargers and any excess energy produced is exported to the utility grids.

Factors to Consider While Buying a Solar Inverter:

• A good quality solar inverter of long life is to be opted.
• Solar panels must be sufficient in number to run the inverter otherwise inverter may get damaged.
• Installing too many solar panels may sometimes cause excessive power production which may not be carried over to next year by your utility grid and thereby you may incur loss.
• String inverters of grid-tie system can be more efficient as they give more voltage with low current due to inter wiring of solar panels into a string of panels.