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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
2.2. Qualification of skilled person
2.2. Qualification of skilled person
The GROWATT MTL Inverters are designed and tested according to international
safety requirements; 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.
2.3. Safety instruction
2.3. Safety instruction
2.4. Assembly Warnings
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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 voltage, cover the entire solar array with dark
material prior to connecting the array to any equipment.
WARNING
Grounding the PV modules
The Growatt MTL is a
transformerless inverter. That is why it has no galvanic
separation. Do not ground the DC circuits of the PV modules
connected to the Growatt MTL. Only ground the mounting frame
of the PV modules. If you connect grounded PV modules to the
Growatt MTL inverters, the error message "PV ISO Low".
Comply with the local requirements for grounding the PV
modules and the PV generator. GROWATT recommends
connecting the generator frame and other electrically conductive
surfaces in a manner which ensures continuous conduction with
ground these in order to have optimal protection of the system
and personnel.
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CAUTION
2.5. Electrical Connection Warnings
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The components in the inverter are live. Touching live
components can result in serious injury or death.
Do not open the inverter except the wire box by qualified
persons.
Electrical installation, repairs and conversions may only be
carried out by electrically qualified persons.
Do not touch damaged inverters.
Danger to life due to high voltages in the inverter
There is residual voltage in the inverter. The inverter takes 20
minutes to discharge.
Wait 20 minutes before you open the wire box.
Persons with limited physical or mental abilities may only work
with the Growatt inverter following proper instruction and under
constant supervision. Children are forbidden to play with the
Growatt inverter. Must keep the Growatt inverter away from
children.
DANGER
