Basics solar inverter pdf

What is a solar inverter?

A solar inverter is one of the most important elements of the solar electric power system. It converts the variable direct current (DC) output of a photovoltaic (PV) solar panel into alternating 220V current (AC). This AC electricity then can be fed into your home to operate your appliances.

What makes a good solar inverter?

Long lasting solar power systems require a high quality inverter with a robust convection cooling system. Low quality inverters have failed in generating the required power. The efficiency and reliability of the inverter is considered one of the most important factors for the success of the solar system.

What type of inverter is used in a PV system?

For low powers, as they are common in small residential PV systems, single-phase inverters are used. They are connected to one phase of the grid. For higher powers, three-phase inverters are used that are connected to all phases of the grid.

How do you ground a solar inverter?

System Grounding – System grounding requires taking one conductor from a two-wire system and connecting it to ground. In a DC system, this means bonding the negative conductor to ground at one single point in the system. This must be accomplished inside the inverter, not at the PV array.

What voltage does a solar inverter need?

Voltage Input – The inverter’s DC voltage input window must match the nominal voltage of the solar array, usually 235V to 600V for systems without batteries and 12, 24 or 48 volts for battery-based systems.

How to choose an inverter for a grid connected PV system?

When specifying an inverter, it is necessary to consider requirements of both the DC input and the AC output. For a grid connected PV system, the DC input power rating of the inverter should be selected to match the PV panel or array.