Types of technologies

The panel technologies which have been deployed in PV systems by local PV companies since their incorporation are classified into six main types namely Mono-crystalline Si, Multi/Poly-crystalline Si, Amorphous Si, CdTe, CIS/CIGS and Bifacial. An analysis of the percentage share of the types of panel technologies deployed in PV systems in each company was made. The conclusions for each technology are:

Mono-crystalline Si: One (1) company has a percentage share of between 15-20% of mono-crystalline Si panel technology, one (1) between 30-35%, three (3) between 35-40% and three (3) between 45-50%.

Poly/multi-crystalline Si: One (1) company has a percentage share of between 15-20% of poly/multi-crystalline Si panel technology, three (3) between 35-40% and three (3) between 45-50%.

Amorphous Si: One (1) company has a percentage share of between 35-40% of amorphous Si panel technology.

CdTe, CIS/CIGS and Bifacial: No company has a percentage share of CdTe, CIS/CIGS and Bifacial panel technologies deployed in their PV systems.

Fig 1. below represents the estimated share of the different types of panel technologies deployed by local PV companies.

Fig.1: Estimated share of panel technologies deployed in PV systems

As a summary, Fig 2. below show the percentage of each of the four mentioned categories of Grid-tied PV systems installed by PV companies in Mauritius.

The power electronics converters deployed in Grid-tied PV projects since the incorporation of the local companies constitute mainly of four types namely String inverter, Central inverter, Micro inverter and Power optimiser.

An analysis of the percentage share of the types of power electronic converters deployed in PV systems in each company was made. The conclusions for each technology are:

String inverter: Four (4) companies have a percentage share of between 0-5% of string inverter deployed in Grid-tied PV systems, one (1) between 40-45% and one (1) between 45-50%.

Central inverter: Five (5) companies have a percentage share of between 0-5% of central inverter deployed in Grid-tied PV systems, one (1) between 5-10% and three (3) between 40-45%.

Micro-inverter: Five (5) companies have a percentage share of between 0-5% of micro-inverter deployed in Grid-tied PV systems, one (1) between 5-10%, one (1) between 30-35% and two (2) between 45-50%.

Power optimiser: Only one (1) company has a percentage share of between 45-50% of power optimiser deployed in Grid-tied PV systems.

Fig 2. below represents the estimated share of the different types of power electronics converters deployed by local PV companies.

Fig.2: Estimated share of power electronics converters deployed in grid-tied PV systems

The preferred choice of power electronics converters for PV projects falling under the different Grid-tied schemes are as summarized below.

SSDG: Six (6) companies prefer string inverter, one (1) prefers central inverter, three (3) prefer micro-inverter and two (2) prefer power optimizer.

MSDG: Five (5) companies prefer string inverter, two (2) prefers central inverter, one (1) prefers micro-inverter and one (1) prefers power optimizer.

Utility: Three (3) companies prefer string inverter and six (6) prefer central inverter.

Fig.3: Preferred choice of power electronics converters in grid-tied systems