Installation
s
WARNING
!
High voltages (both AC and DC) capable of causing severe injury or death by electrical shock are
present in this unit. This unit should only be installed or serviced by technically qualified professionals.
When working on or near the SubDrive Solar controller, or system:
• Securely cover the solar array with an opaque tarp.
• Turn OFF the external DC-rated disconnect from the solar array to the SubDrive Solar controller.
• Ensure AC power has been disconnected from the SubDrive Solar controller (if used).
• Wait a minimum of 5 minutes after removing power from the SubDrive Solar controller
before servicing.
READ THESE INSTRUCTIONS COMPLETELY BEFORE INSTALLATION.
Note: During installation, if a conflict arises between this manual and local or national electrical
codes, the applicable local or national electrical codes should prevail.
• The longevity and performance of the SubDrive Solar package may be adversely affected by
improper installation.
• The solar PV array structure, modules, and wiring harness must be properly assembled according
to the manufacturer's installation instructions before installing the SubDrive Solar controller.
• Wiring Requirements: Use 75 °C rated wire sized for a maximum voltage drop of 3% per local
electric codes.
Installation Preparation and Requirements
When installing the SubDrive Solar controller, be aware that:
• High voltage is present in the SubDrive when powered on; use caution when live DC power is on.
• Do not allow any unauthorized persons near the solar array and connection sites while
power is applied.
• It is strongly recommended that a DC-rated disconnect box be used to disconnect the incoming DC
power from the SubDrive Solar controller during installation and maintenance. Use a Volt Meter
to confirm the absence of voltage in the line before proceeding with installation or maintenance.
• The DC disconnect should be sized to be capable of adequately disconnecting the output open
circuit voltage (Voc) and short circuit current (Isc) of the solar array.
• Keep all flammable materials away from the assembly site, including dry brush and vegetation.
• For optimal performance, avoid placing the PV solar array around any objects that can cast
shadows or reduce sunlight to the array.
• Install the SubDrive Solar controller out of direct sunlight to prevent overheating and reduced
performance. The optimum location is on the mounting pole for the PV Solar Array underneath
the array for protection from the sun, heat, and weather elements.
• Keep the surrounding area clear of vegetation.
• Do not block airflow around the SubDrive Solar controller heat sink.
• Limit access of animals to the system.
• Protect wires from damage from wildlife and weathering by using conduit. For additional
protection, bury the conduit in the ground.
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