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2.1 Intended Use
The unit converts the DC current generated by the photovoltaic (PV) modules to
grid-compliant alternating current and performs single-phase feed-in into the
electricity grid. Growatt 2500MTL-S,Growatt 3000MTL- ,Growatt 3600MTL-
,Growatt 4200MTL- ,Growatt 5000MTL- ,Growatt 5500MTL- , inverters are
built according to all required safety rules. Nevertheless, improper use may cause
lethal hazards for the operator or third parties, or may result in damage to the units
and other property.
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Principle of a PV plant with this GROWATT XXXXMTL- single-phase inverter
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Position
Description
A
PV modules
B
C
D
E
F
DC load circuit breaker
Growatt Inverter
AC load circuit breaker
Energy meter
Utility grid
The inverter may only be operated with a permanent connection to the public
power grid. The inverter is not intended for mobile use. Any other or additional use
is not considered the intended use. The manufacturer/supplier is not liable for
damage caused by such unintended use. Damage caused by such unintended use
is at the sole risk of the operator.
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Safety
PV modules Capacitive Discharge Currents
PV modules with large capacities relative to earth, such as thin-film PV modules
with cells on a metallic substrate, may only be used if their coupling capacity does
not exceed 470nF. During feed-in operation, a leakage current flows from the cells
to earth, the size of which depends on the manner in which the PV modules are
installed (e.g. foil on metal roof) and on the weather (rain, snow). This "normal"
leakage current may not exceed 50mA due to the fact that the inverter would
otherwise automatically disconnect from the electricity grid as a protective
measure.
2.2 Qualification of skilled person
This grid-tied inverter system operates only when properly connected to the AC -
distribution network. Before connecting the Growatt MTL- to the power
distribution grid, contact the local power distribution grid company. This
connection must be made only by qualified technical personnel to connect, and
only after receiving appropriate approvals, as required by the local authority
having jurisdiction.
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2.3 Safety instruction
The GROWATT MTL- Inverters is designed and tested according to international
safety requirements(IEC62109-1,VDE-AR-N4105,CE,VDE0126-1-1,CE10-21
AS4777,NBT32004-2013,EN50438)
;
however, certain safety precautions must be
observed when installing and operating this inverter. Read and follow all
instructions, cautions and warnings in this installation manual. If questions arise,
please contact Growatt's technical services at +86 (0)755 2747 1900.
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2.4 Assembly Warnings
Prior to installation, inspect the unit to ensure absence of
any transport or handling damage, which could affect
insulation integrity or safety clearances; failure to do so
could result in safety hazards.
Assemble the inverter per the instructions in this manual.
Use care when choosing installation location and adhere
to specified cooling requirements.
Unauthorized removal of necessary protections, improper
use, incorrect installation and operation may lead to
serious safety and shock hazards and/or equipment
damage.
In order to minimize the potential of a shock hazard due to
hazardous voltages, cover the entire solar array with dark
material prior to connecting the array to any equipment.
WARNING
