2.2 Qualification of skilled person
This grid-tied inverter system operates only when properly connected to the AC
distribution network. Before connecting the MID TL3 -X 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 juri sdiction.
2.3 Safety instructions
1. Please read this manual carefully before installation.If you fail to install ac-
cording to the instructions in this manual,or ignore the warnings in the manual
and the equipment is damaged,our company reserves the right not to guarantee
the quality;
2. All operations and wiring should be finished by the professional electrical or
mechanical engineers;
3. During installation,except for the wiring terminals,please do not move other
parts inside the chassis;
4. All electrical installations must comply with local electrical safety standards;
5.If the machine needs maintenance,please contact the local designated system
installation and maintenance personnel;
6. The use of this machine for grid-connected power generation requires permis-
sion from the local power supply department;
7. When installing photovoltaic modules during the day,use opaque materials to
cover the photovoltaic modules,otherwise the voltage at the module terminals will
be high in the sun,which may cause personal danger.
> Before installation, pleaecheckthe unit to ensure that there
is no transportation or handling damage, which may affect
the insulation integrity or safety clearances; otherwise, it
may cause safety hazards.
> Follow the instructions in this manual to assemble the in-
verter. Note that select th e suitable mounting location and
comply with the specified requirements of cooling.
> Unauthorized removal of necessary protections, improper
use, incorrect installation and operation may lead to serious
safety and shock hazards and/or equipment damage.
> Inorder to minimize the possibility ofshock hazardsdueto
dangerous voltages, cover the entire solar array with dark
colored materials before connecting the array to any equip-
ment.
> Grounding the PV modules: the MID TL3-X is a transformerless
inverter, which means there is no galvanic separation. Do not
grounding the DC side of the MID TL3-X inverter. Only
grounding the mounting frame of the photovoltaic module.
Otherwise there will be an error message “ PV ISO Low".
> Comply with the local requirements for grounding the PV
modules and the PV generator. GROWATT recommends con-
necting the generator frame and other electrically conductive
surfaces in a manner which ensures continuous conduction
with ground in order to have optimal protection of the system
and personnel.
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