TYPICAL SOLUTIONS FOR C&I PV STORAGE & CHARGING
2.3
EQUIPMENT SELECTION
Grid-connected Inverter 2.3.2
The grid-connected inverter converts direct current (DC) into alternating current (AC) suitable for injection into the grid. Generally, there are three types of grid-connected inverters: micro inverters, string inverters and centralized inverters. The comparative analysis is shown in the table below.
Table 3 The Comparative Analysis of Grid-connected Inverters
Item
Micro-Inverter
String Inverter Centralized Inverter
Centralized large power station
Not applicable
Applicable
Applicable
Large-scale distributed industrial and commercial rooftop power station Small and medium-sized distributed C&I rooftop power station Distributed residential rooftop power station Number of solar modules corresponding to a single MPPT
Not applicable
Applicable
Applicable
Applicable
Applicable
Not applicable
Applicable
Applicable
Not applicable
Single string
1-4 strings
Large number of strings
MPPT voltage range
Wide
Wide
Narrow
Power generation efficiency
Highest
High
General
Installation area
No need
No need
Need a separate room
Outdoor installation
Allowed
Allowed
Not allowed
Maintainability
Difficult to maintain
Easy to maintain
General
Inverter cost
Micro Inverter > String Inverter > Centralized Inverter
Micro Inverter > String Inverter / Centralized Inverter (the two are similar)
System cost
As a well-known inverter supplier at home and abroad, Chint Power Company not only provides 1KW-3.125MW grid-connected PV inverters, but also provides battery modules, ESS cabinets, PCS and energy storage systems and overall solutions.
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