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Glossary
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3
AC
Abbreviation for "Alternating Current"
DC
Abbreviation for "Direct Current"
Energy
Energy is measured in Wh (watt hours), kWh (kilowatt hours) or MWh (megawatt
hours). The energy is the power calculated over time. For example, your inverter
operates at a constant power of 4600 W for half an hour and then at a constant power
of 2300 W for another half an hour, it has fed 3450Wh of energy into the power
distribution grid within that hour.
Power
Power is measured in W (watts), kW (kilowatts) or MW (megawatts). Power is an
instantaneous value. It displays the power your inverter is currently feeding into the
power distribution grid.
Power rate
Power rate is the radio of current power feeding into the power distribution grid and
the maximum power of the inverter that can feed into the power distribution grid.
Power factor
Power factor is the ratio of true power or watts to apparent power or volt amps. They
are identical only when current and voltage are in phase than the power factor is 1.0.
The power in an ac circuit is very seldom equal to the direct product of the volts and
amperes. In order to find the power of a single phase ac circuit the product of volts and
amperes must be multiplied by the power factor.
PV
Abbreviation for photovoltaic.
Wireless communication
The external wireless communication technology is a radio technology that allows the
inverter and other communication products to communicate with each other. The
external wireless communication does not require line of sight between the devices
and it is selective purchasing.
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Safety
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1
Intended Use
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2
Qualification of skilled person
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Safety instruction
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 8000MTLP-S, Growatt 9000MTLP-S, Growatt 10500MTLP-S 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.
Principle of a PV plant with thisGROWATT XXXX MTLP-S single-phase inverter
Position Description
A
B
C
D
E
F
PV modules
DC load circuit breaker
AC load circuit breaker
Energy meter
Utility grid
Growatt MTLP-S Inverter
A
B
C
D
E
F
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.
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.
This grid-tied inverter system operates only when properly connected to the AC -
distribution network. Before connecting the MTLP-S 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.
The GROWATT MTLP-S Inverters is designed and tested according to international
safety requirements
（
IEC61727/62116,INMETRO
）
;
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 1942.
