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1. Introduction
1.1 Introduction
This manual describes solar inverters:
NAC10K-LV/NAC12K-LV/NAC15K-LV/NAC20K-LV.
These inverters are transformerless based inverter.
Please read the safety instructions in this manual first. Throughout the manual it is assumed that the reader is
familiar with AC and DC installations and knows the rules and regulations for electrical equipment and for
connecting it to the utility AC grid. It is especially important to be familiar with the general safety rules for
working with electrical equipment.
1.2 Applied designations
Throughout the manual important information is shown at different levels depending on the character of the
information, as shown here:
Safety information important for human safety. Violation of warnings may result in injury
to persons or death.
Information important for the protection of property. Violation of this type of information
may cause damage and loss of property.
Useful additional information or “Tips and Tricks" on specific subjects.
1.3 Important safety information
Read this before installing, operating or maintaining the inverter.
Before installation:
Check for damage to inverter and packaging. If you are in doubt, please contact your
supplier before installing the inverter. Check the voltages of the solar modules and make
sure they are within the limits of the inverter specifications before connecting them to the
inverter.
Installation:
Only trained and authorized personnel familiar with local electrical codes may install the
inverter. For optimum safety, please follow the steps described in this manual. Keep in
mind that the inverter has two voltage carrying sides, the PV input and the AC grid.
Disconnecting the inverter:
Always disconnect the AC line first! Afterwards disconnect the PV lines. Note that the
inverter can still be charged with very high voltages at hazardous levels even when it is
disconnected from grid and solar modules. Wait at least 5 min. before proceeding, after
having disconnected from grid and PV panels.
Operating the inverter:
Before connecting the AC grid to the inverter, make sure that the installation cover is
Summary of Contents for NAC10K-LV
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