Owner`s manual

8 | P a g e
•The System's DC Negative conductor must not be bonded to earth ground. The Classic does this with its
internal Ground Fault Protection circuitry. The battery negative and ground are not bonded together directly but
are connected together by the Classic’s internal GFP device. All negative conductor connections must be kept
separate from the grounding conductor connections. The equipment ground terminal inside the Classic must be
connected to Earth Ground for the internal DC-GFP to work. Continue
• With the exception of certain telecom applications, the Charge Controller should never be positive grounded.
• The Charge Controller equipment ground is marked with this symbol:
• If damaged or malfunctioning, the Charge Controller should only be disassembled and repaired by a qualified
service center. Please contact your renewable energy dealer/installer for assistance. Incorrect reassembly risks
malfunction, electric shock or fire.
• The Charge Controller is designed for indoor installation or installation inside a weatherproof enclosure. It
must not be exposed to rain and should be installed out of direct sunlight.
For routine, user-approved maintenance:
• Turn off all circuit breakers, including those to the solar modules, batteries and related electrical connections
before performing any maintenance.
Standards and Requirements
All installations must comply with national and local electrical codes; professional installation is recommended.
The NEC in the USA requires a DC ground fault interrupter for all residential PV installations. NEC2011
requires an ARC FAULT detector on all charge controllers and inverters operating above 80VDC. Both of these
devices are built into the Classic.
DC and Battery-Related Installation Requirements:
 All DC cables must meet local and national codes.
 Shut off all DC breakers before connecting any wiring.
 Torque all the Charge Controller’s wire lugs and ground terminals to the specs found on page 19.
 Copper wiring must be rated at 75° C or higher.
 Keep cables close together (e.g., using a tie-wrap) as much as possible to reduce inductance.
 Ensure both cables pass through the same knockout and conduit to allow the inductive currents to
cancel.
 DC battery over-current protection must be used as part of the installation on the input and output.
 Breakers between the battery and the Classic must meet UL489 standards.
 Breakers between the DC source and the Classic must meet UL1077 or UL489 standards.
Design the battery enclosure to prevent accumulation of hydrogen gas at the top of the enclosure. Vent the
battery compartment from the highest point to the outside. A sloped lid can also be used to direct the flow of
hydrogen to the vent opening. Sealed (AGM, Gel etc) batteries do not normally require ventilation. Consult your
battery manufacturer for details.
WARNING: PERSONAL PRECAUTIONS DURING INSTALLATION
WARNING BATTERIES PRESENT RISK OF