System Modes Overview; Grid Tie; Self Supply - Generac Power Systems PWRcell XVT076A03 Installation And Owner's Manual

System Modes Overview

Generac PWRcell offers several system modes for vari-
ous installation configurations, markets, and applications.
Connected REbus devices work together to manage the
distribution of power based on the selected system
Priority

Grid Tie

Support local
1
loads.
2 Export to grid.
3 –
4 –
*Suitable for AC Coupled PV. In this application, PV energy is generated by the AC Coupled PV system only. For more information, see
pled PV.
Goal
Net-metering solar energy without a battery.
Use grid as little as possible.
Keep batteries charged using only solar power.
Keep batteries charged as much as possible.
Export maximum power including stored energy.
Grid Tie
In Grid Tie mode, the PWRcell Inverter functions as a
conventional grid-tied inverter system. The system
powers local loads and when generation exceeds load
demand, excess power is exported to the utility for net
metering and other credits.
NOTE: Grid Tie is intended for use with systems that do
not include a PWRcell Battery. For systems where a
PWRcell Battery will be connected at a later date,
operate in Grid Tie mode until the battery is installed.

Self Supply

NOTE: This feature requires CTs to be properly installed
and calibrated prior to use.
In Self Supply mode, the inverter prioritizes powering
local loads first using solar and/or stored power. This
mode is optimal in markets where net metering is
unavailable or unfavorable, making battery-stored power
more economically attractive than power from the utility
grid.
Installation and Owner's Manual for Generac PWRCell Inverter
Table 7-1. Grid Connected Inverter System Modes
Self Supply* Clean Backup
Support local loads
Charge batteries from
with PV and batter-
ies.
Charge batteries Support local loads
from PV.
Export to grid.
–
Table 7-2. Optimal System Mode for Goal
mode. Some modes interact with PWRcell Batteries to
store power and/or balance production and consumption.
See and
Table 7-1 Table 7-2
system modes.
Priority Backup*
Charge batteries
PV only.
Charge batteries
with PV.
Support local loads
Export to grid.
– Export to grid.
Optimal Inverter Configuration
Self Supply
Clean Backup
Priority Backup
See Figure 7-26. If more power is being produced by the
solar array than is needed by local loads, the inverter
stores the energy in the battery for later use.
Figure 7-26. Self Supply (1 of 3)
See Figure 7-27. When the battery is full and a surplus of
power is available, that surplus is exported to the grid.
System Operation
for an overview of available
Sell
Exports maximum
amount of power
from PV. using any energy
available.
Charge batteries
from excess PV
from grid.
energy.
with PV.
Grid Tie
Sell
–
–
AC Cou-
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