Product Manual

Configuration
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Table 3-6 Grid Support Settings Menu
Item Description
Grid Supp Volts Sets the level to which the batteries will be discharged when the inverter is selling
power to the grid or supporting the power grid by providing additional power to the
loads on AC Out. This setting is not adjusted for the battery temperature even if the
temperature sensor is installed.
Sell
Turns sell mode on and off. When Sell is set to enabled, the Conext XW+ AC output is
divided between powering loads and delivering power to the utility grid. Sell mode
requires the battery voltage to be above
Grid Supp Volts . All configurations must
comply with local and national electrical codes. The renewable energy from the
battery is exported to the grid as long as the battery voltage is greater than or equal to
Grid Supp Volts . See Figure 3-8 on page 3–30.
• Grid-tie entry condition: battery voltage is greater than Grid Supp Volts.
• Grid-tie exit condition: battery voltage is lower than Grid Supp Volts less 0.5 V.
There is a time delay associated with the entry and exit conditions. The default is
20 seconds. The delay can be extended to 40 seconds if the battery voltage is not
very stable (Figure 3-3, “Basic and Advanced Settings” on page 3–7 and Table 3-12,
“Advanced Features Menu” on page 3–49). This delay helps to avoid sell power
fluctuations when the battery voltage fluctuates.
There is an exception. The delay is zero when the battery voltage suddenly changes
to 2 V above Grid Supp Volts. For example, when a wind turbine or micro-hydro is
connected to a small battery bank which may create a sudden change on the
battery voltage. In this case the system will immediately respond by converting the
energy from the battery to grid.
Max Sell Amps Sets the maximum AC amps allowed to be delivered to the utility grid from a solar
array and/or the batteries during grid-tie operation (except from AC-coupled grid-
tied inverter). This setting is only used if Sell is set to enabled.
Max Sell Amps must be less than 80 percent of the selected AC1 breaker setting. If
set higher, the breaker setting will override the Max Sell Amps setting to avoid
tripping the breaker.
Load Shave Enables or disables the load shave feature. Load shave allows the Conext XW+ to
support the grid in powering local loads during a defined window of time (set using
Load Shave Start and Load Shave Stop). If Load Shave is set to enabled:
• If the battery voltage is above Grid Supp Volts, then the current taken from the
grid is reduced to zero (see Figure 3-7, “Load Shave Mode” on page 3–27). This
maximizes the renewable energy for AC load usage.
• If battery voltage is below ReCharge Volts +0.5 V, then it will exit load shave
mode and enter AC pass through mode.
XW_Operation.book Page 26 Wednesday, August 12, 2015 2:39 PM