Description

Sigma+ PCU

Sigma+ PCU is a solar power conditioning unit which is a single-phase output, Inverter system. It works as a Bi-directional inverter which means power will be exported into the grid or power will be imported from the Grid.

The Sigma+ PCU work in two operating conditions:
1. Stand-alone
2. Grid-Interactive

Stand-alone: Inverter operates from battery or array power source and produces AC output. Battery charged by solar (primary) & also from the grid (secondary). Since the usage of power from the grid is secondary, grid power is only used when solar power is absent or below a certain level and battery voltage level reduces up to battery low status. Working Modes: Smart, PCU & Hybrid

Grid-Interactive: Inverter operates from battery or array power source and produces AC output and also operates in parallel with the grid supply. Any excess solar power will be exported into the grid. Whenever sufficient solar power is not available to run the load, the required power is shared from the grid. The maximum power feed into the grid depends on the system rating. Battery charging automatically occurs from the grid to maintain the battery bank at its grid charging voltage. Working Modes: Grid Export Mode