NOTE
The INVOLAR ETU (Energy Terminal Unit) communication gateway, the INVOLAR
LCF(Line Communication Filter) ,and the INVOLAR SEDAS(Solar Energy Data
Acquisition System) are optional elements, before installing these elements, read
all instruction and cautionary marking in the related user manual.
4.2 The INVOLAR MAC250 Micro-Inverter
By adopting high frequency DC link topology (Figure 4-2) and dual –DSP controller, the Involar
MAC250 achieves precise variable frequency control for soft-switching during full load range. So
that the MAC250 exhibit slow profile and high efficiency. Additionally, MAC250 shows high
reliability, high power factor and low total harmonic distortion. The INVOLAR MAC250
Micro-Inverter realize the system expansion by simple parallel operation (maximum 16 PV
modules per branch)
PV
in
C
o
C
o
L
G
v
HF
DC/DC
i
v
oo
Figure 4-2 the INVOLAR MAC250 Micro-Inverter Operation Principle
4.3 Features
Advantages
Easy installation
Without parameter configuration
High level system reliability
Low PV system noise
Remote web-based monitoring and analysis
System maximize energy harvest
Performance
High efficiency
High power factor
Soft start
Low current harmonic
Low DC injection
Protection Function
Over voltage and under voltage protection
Over frequency and under frequency protection
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