Inverters are used to convert direct current (DC) generated by PV modules into alternating current (AC) consumed by elect­rical appliances

What all should be considered before buying Inverter:

  • Efficiency – ratio between the output and input power (energy)
  • Input voltage range => PV field design and exploitation
  • Environmental stability: temperature range, dust and humidity
  • MPPT algorithm dynamic features and ability to be accommodated
  • Simple installation, operation and maintenance
  • Ability to meet the grid operator requirements and standards
  • Protections: anti-islanding, ground fault, leakage, surge…
  • Data processing => software and communication
  • Safe operation: health accidents prevention

Type of inverter

String inverters

 These inverters are small, compact, highly efficient devices with lighter weight construction. The power output range is usu­ally from 2 kW to 20 kW. Because they are designed to be wired to a single series string of solar modules, they have been cal­led string inverters. String inverters comes in single-phase or three-phase version with outdoor or indoor enclosures.

String inverters are used for a wide range of applications, from small residential to large-scale ground mounted systems. Any solar pv- power plant system designed with string invertor would normally deliver higher yields, thanks to the distributed MPPT(multiple power point tracking) facility and loses of the DC side are higher than on AC side.

Central inverters

Central inverters are a cost-effective approach to developing large-scale solar systems. Inverters are robust and heavy with forced ventilation cooling. The power output range is usually from 50 kW to 1500 kW. Central inverters are monolite or modular too(for cutting down risk factor), mostly used in large scale power plants, such inverters come with standard built in LCD displays, alarm light controls, grid connection settings possibility as well as integrated communication ports.

We recommend using inverter from Italy company POWER ONE. For more information read here.


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