Aptos Solar Panel Installation Manual

Installation Manual
High Efficiency Half-Cell Module
2
www.aptossolar.com | [e-mail] All Rights Reserved. DNA-120/144
Version: AS-IM-001
Frame Cross Section
Module Wiring
AST DNA panels are pre-wired and terminated with
MC4 compatible connectors.
Connections to other panels should use compatible
connectors that comply with Code requirements. AST
recommends that all wiring be double insulated with a
minimum rating of 90 C, and wiring should use flexible
copper conductors where minimum size should be
determined by the applicable codes.
The cables and connectors are UV and weather
resistant from -40 C to +90 C and rated for 1500VDC.
Panels may be wired in series or parallel to obtain
desired voltages and current but must not exceed the
system rating for voltage and current.
AST panels may produce up to 20% more power than
STC rating, depending on system design and albedo.
The additional power gain should be taken into
consideration when determining optimum system sizing,
string length, and selecting system components and
wiring.
Overcurrent protection devices should be employed.
20A current rating for series or parallel. Please comply
with all code and design requirements.
Grounding
NEC, article 250 governs grounding method. Grounding
method must follow local electric codes. Use bolt, M4,
cup washer, grounding wires, flat washer, tooth washer,
screw nut, M4 and install as shown in the diagram
below.
Torque specification is 2 to 3 Nm. Grounding materials
is evaluated under UL1703.
Specifications
The electrical characteristics are within ± 10 % of the
indicated values of Isc, Imp, Vmp, and Voc and ± 3 % of
the indicated value Pmax under standard testing
conditions (irradiance of 1000/m2, AM 1.5 spectrum,
and a cell temperature of 25 C)
Under normal conditions, solar panels are likely to
experience conditions that produce more current and/or
voltage than stated at standard test conditions.
Accordingly, the values of Isc and Voc, inclusive of
bifacial gain, should be multiplied by a factor of 1.25, or
more, when determining component voltage ratings,
and size of controls connected to the PV output. (Refer
to code and design requirements).
AST DNA panels have a maximum system voltage of
1000 VDC. Some grid-tied systems operate or near this
voltage rating. The Voc increases as the ambient
temperature decreases.
Maximum system voltage is computed as the sum of
the open-circuit voltage of the series-connected panels
for the lowest expected ambient temperature.
Temperature coefficients can be used to provide the
most accurate prediction of the panel voltage under
temperature extremes.