Installation Guide

Note:
n PV array voltages often exceed STC voltage specifications, especially when the
array is cold. At cold temperatures the open circuit voltage will be higher than at STC
or MPPT operating points. Refer to data provided by the maker of the PVpanels and
ensure the maximum voltage can never exceed the limits in the table above.
n PV array current might exceed STC current specifications, especially under intense
sunlight, certain atmospheric conditions, or from reflections (i.e, water, snow, or ice).
Some electrical codes (eg. the NEC) consider the worst case current to be 25%
higher than the short circuit current at STC. For selection of wire and some
components (breakers, fuses) a further 25% derating is applied.
MPPT Voltage Range
The charge controller’s Maximum Power Point Tracking (MPPT) algorithm maximizes
the output energy of PV arrays as long as the operating voltage is within the MPPT
operational window. The MPPT operational window is shown below.
NOTICE
EQUIPMENT DAMAGE
Make sure that the PV arrays have been designed to always operate within the MPPT
operational window (0 to 600 V).
Failure to follow these instructions can result in equipment damage.
Figure 17MPPT Operational Window
Specifications Conext MPPT 80 and MPPT 100 Installation Guide
990-91319 This document is for use by qualified personnel 58