Conext XW PRO 6848 6,800W 48V Installation

In a ‘fixed’ battery voltage system configuration, the Conext XW Pro manages the
battery voltage to the Grid Support Voltage setting. This is done by converting the
available DC power to AC power to support the AC loads attached to the inverter output
or exports to the utility grid (AC1). Because the battery bank voltage may not reach
bulk/absorption voltages in this mode, it is recommended to occasionally force a full
charge cycle by either temporarily disabling grid support or forcing a bulk charge cycle
from the grid (see Force Charger State in "Controls Settings" on page54).
Enhanced Grid Support with Conext MPPT Solar Charge Controllers
This setup is suitable for Conext Systems with only Conext MPPT Solar Charge
Controller(s) networked to Conext XW Pro units through Xanbus. In this configuration,
Grid Support Voltage is set above the charge controller’s Equalization voltage (for
example, 64 volts).
In an enhanced grid support set up the Conext XW Pro automatically tracks the Conext
MPPT Solar Charge Controller voltage as it transitions through charge states (from bulk
to absorption to float). This allows the system to execute a complete battery charge
cycle while still converting excess DC power to AC power to support the AC loads or be
exported to the utility grid. In doing so, the Conext XW Pro only uses excess DC not
required by the battery or used to support local AC loads and sells it to the grid, thereby
maximizing the use of the PV array. Since this set up allows the battery bank voltage to
reach absorption levels (when PV harvest is adequate), the state of health of the battery
is improved. The sell entry and regulation voltage level is 1 V below absorption and float
of the Conext Solar Charge Controller set points. The exit from sell is 1.5 V below
absorption and float of the Conext Solar Charge Controller set points.
Figure 23 Charger Block
NOTE: [Tdelay] is an entry/exit transition time delay to/from grid support and sell mode.
If the battery voltage has higher fluctuations due to DC renewable sources (e.g.charge
controllers, wind turbines, and so on), then the time delay can be increased by setting
Sell Delay 40 Sec to enabled (refer to "Advanced Features" on page87). If the
battery voltage has a sudden increase change greater than Grid Support Volts +
2V, then the Conext XW Pro will override the delay and enter grid support or sell mode
immediately.
Configuration Conext XW Pro Owner's Guide
990-91227A-01 This document is intended for use by qualified personnel 95