© 2021 Sunman (Zhenjiang) Co., Ltd. All rights reserved. Specifications included in this manual are subject to change without notice.
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version 2021A page 21 / 29
Electrical installation
• Any hardware used must be compatible with the mounting structure material to avoid galvanic
corrosion.
• It is not recommended to use eArc with different configurations in the same system.
• Excessive cables must be organized or fixed in an adequate way, e.g. attached to the mounting structure
by using cable ties.
• For applications requiring high operating voltage several eArc can be connected in series to form a string
of eArc; the system voltage is then equal to the sum of the voltage of each eArc.
• For applications requiring high operating currents several strings of eArc can be connected in parallel;
the system current is then equal to the sum of the current of each string of eArc.
• The maximum system voltage is 1000 volts DC.
• The maximum number of series connected eArc depends on system design, the type of inverter used
and environmental conditions.
• Please make sure no more than two strings in parallel if eArc without any fuse or blocking diode to be
connected according to the maximum series fuse rating of eArc and local electrical installation code.
• There is no limitation on the number of eArc that can be connected in parallel (fuse for each string
should be considered), the number of eArc is determined by system design parameters such as current
or power output.
• To prevent the cables and the connectors from overheating, the cross section of the cables and the
capacity of the connectors must be selected to suit the maximum system short circuit current. The
recommended cable is PV wire (temperature rating is 90°C) with a cross section of at least 2.5mm².
• Please refer to local regulations to determine the system wires size, type and temperature.
• eArc are supplied with connectors to be used for system electrical connections. Please refer to the local
regulations and the datasheets for which connectors are allowed to be used.
• To ensure reliable electric connection and to prevent possible intrusion of humidity, connectors must
be mated and locked together until a click can be heard.
• Long-term exposure to wet environments may cause connectors’ poor connectivity, resulting in current
leakage and poor conductivity. SUNMAN recommend proper connector/cable/wire management to
prevent moisture intrusion. Depending on the amount of humidity, SUNMAN recommends periodic
inspections of the installation system to maintain optimal eArc’ performance.
• The DC current generated by photovoltaic systems can be converted into AC and fed into a public Grid.
As local utilities’ policies on connecting renewable energy systems to the Grids vary from region to
region. Always seek the advice from a qualified system designer or integrator. Building permits,
inspections and approvals by the local utility are to be expected.
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