NCPV preprints for the 2. world conference on photovoltaic solar energy conversion Page: 79 of 144
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laminate (260 to 300 Wdc) (Fig. 1). The AC Module can
be configured for output into a 120/240 Vac split-phase or
120/208 Vac three-phase connection. The integrated unit
is UL-listed, National Electrical Code (NEC) compliant
and meets Federal Communications Commission (FCC)
standards for electromagnetic interference. It is sold as a
complete power unit, ready for utility interconnection, and
is compatible with the Ascension RooflackTM mounting
system for rapid, low-cost installation. Features of the
SunSinei300 inverter include a plug-in connector for
rapid "AC Module" assembly and quick-connectors for
rapid installation with no DC field-wiring needed . The
SunSine'"300 AC inverter features include passive and
active anti-islanding protection and maximum power-point
tracking. ATI recently completed a pilot production run,
to ISO 9001 standards, of 109 SunSine'300 AC Modules
with 100% successful operation at start-up. Over 100 units
have been installed and a production run of 200 AC
Modules is now in progress.
Table 1: Subcontractors now completing work in PVMaT
Phase 4A1 and topics of their work.
Ascension Manufacture of an AC Photovoltaic
Technology, Inc. Module
Advanced Energy Next-Generation Three Phase Inverter
Evergreen Advanced Polymer PV System
Omnion Power Three-Phase Power Conversion
System for Utility-Interconnected PV
Engineering Corp. Applications
Solar Design The Development of Standardized,
Associates, Inc. Low-Cost AC PV Systems
Solar Electric Design, Fabrication, and Certification
Specialties of Advanced Modular PV Power
Trace Modular Bi-Directional DC- to
Engineering AC- Power Inverter Module for PV
Utility Power Development ofaLow-CostIntegrated
Group, Inc. 20-kW AC Solar-Tracking Sub-Array
for Grid-Connected PV Power System
Evergreen Solar, Inc. combined several developments
in module-related advancements. Based on their
knowledge about the variety of polymeric materials on the
market, Evergreen evaluated alternative materials to
improve PV-panel manufacturing and PV-system
installation.After testing and evaluation, the company
identified two materials. The first is a transparent
encapsulant laminated in air. This material permitted
Evergreen to develop a continuous, non-vacuum
Figure 1: Back of Ascension Technology's
"SunSune300" AC Module " illustrating the AC inverter.
lamination process for PV panels using a heated-roll
method The encapsulant has reported material costs lower
than EVA-based materials currently in use . Evergreen
also identified a PV-laminate backskin material. This
material, used to replace TedlarTl, can also be applied as
an edge sealant. This backskin material eliminates the
need for a frame, as it is strong enough to protect the
edges of the glass superstrate. The backskin is also highly
puncture resistant, with low vapor permeability and high
adhesion characteristics. The company capitalized on
these multiple qualities to develop their Innovative
Mounting System, where a mounting rail adheres to the
back of the module for rapid, easy, panel installation in the
field. Both these advancements are discussed in depth in
papers by J. I. Hanoka at this conference.
Solar Design Associates, Inc. teamed with Solarex and
Advanced Energy Systems, Inc. (AESI) to improve
reliability and safety and to reduce costs through pre-
engineered components for standardized, low-cost PV
systems . AESI completed product enhancements for
their MI-250 MicroInverter, including software controls
and power-line carrier monitoring. This AC inverter is
UL-listed, FCC-compliant, and can be ordered in export
voltage ranges. Solarex developed a low-cost, pre-
engineered assembly for mounting a PV array. The
standardized system combines framing and mounting the
PV array and incorporates electrical interconnection, array
wiring, grounding, and lightning protection into the frame.
With features such as quick-connect wiring and approved,
simplified grounding, PV systems can be rapidly installed
at minimal cost. For example, a recent 1-kW Solarex
system demonstration using thin-film modules was
completely installed and operational, including the utility
interconnection, in less than 4 hours.
Solar Electric Specialties (SES) completed
manufacturing improvements as part of their effort to
increase standardization and modularity in integrated,
factory-packaged PV systems. The benefits to this
approach are shorter lead times with lower materials costs,
higher overall quality and system reliability, decreased
management and engineering time, and lower installation
labor. In addition, SES made a concerted effort to achieve
safety and performance listings for two product lines,
discussed below, including UL-listing and Factory Mutual
(FM) approval. Their approach for standardized product
lines simplifies the process for customers to specify
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NCPV preprints for the 2. world conference on photovoltaic solar energy conversion, article, September 1, 1998; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc707815/m1/79/: accessed December 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.