Single-phase photovoltaic off-grid inverter

Gospower single phase Off-grid inverter with built-in MPPT is for backup power supply and self-consumption applications for homes and small businesses, providing power for all kinds of needs.

This off-grid inverter model is capable to produce AC sinewave output voltage at 230 V 50 Hz up to1 kWpower from a 48 V DC lead acid battery source. The AC sine wave output waveform achieved a voltage Total Harmonic Distortion (THD) of less than 1 % which is almost a pure sine wave.

In grid integrated SPV system, inverter plays an essential role for converting DC power from SPV to utility demanded AC power. Fig. 1. Power generated from grid-connected and off-grid PV-systems . There are different inverter techniques in SPV system . Voltage Source Inverter (VSI) with boosting unit is the conventional technique.

Integrates multiple protections and fault monitoring to ensure the safety of batteries and equipment. S6-EO1P (4-5)K-48-EU series off-grid inverter is designed for areas without power grids or areas with frequent power outages. It supports parallel operation of up to 6 units, systems of up to 30kW.

The inverters are categorized into four classifications: 1) the number of power processing stages in cascade; 2) the type of power decoupling between the PV module (s) and the single-phase grid; 3) whether they utilizes a transformer (either line or high frequency) or not; and 4) the type of grid-connected power stage.

Transformerless inverters are considered desirable for a photovoltaic system. Multi-stage topologies can be a good choice in non-isolated inverters, but they require two or more stages for converting solar PV power to grid power as shown in Fig. 5, leading to reduced efficiency, , , , .