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

System Operation

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 –
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 properly installed
and calibrated prior to use.
In Self Supply mode, the inverter prioritizes powering
local loads first using solar and/or stored power by
attempting to maintain a zero reading at the CTs. If the
home is consuming power, the inverter will first use
available PV production to cover the demand. If local
load demand exceeds PV production, the battery will
begin to discharge to compensate and maintain the zero
reading. If load demand exceeds what the PWRcell
system can supply from PV and the battery, the
remaining power needed will be drawn from the grid. If
load demand is less than PV production, the PWRcell
54
Table 7-1. Grid Connected Inverter System Modes
Self Supply Clean Backup
Support local loads
with PV and batteries.
Charge batteries from Support local loads
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 Charge batteries
from PV only.
Charge batteries
with PV.
Support local loads
Export to grid.
– Export to grid.
Optimal Inverter Configuration
Clean Backup
Priority Backup
system will attempt to charge the battery. Only when the
battery is fully charged, and local demand is satisfied will
the system export to the grid.
If there is another grid-interactive secondary power
source (ex. PV system, ESS) interconnected on the load
side of the PWRcell CTs, the production from this power
source will be available to the PWRcell system. If other
secondary power source production exceeds what the
home can consume, and the PWRcell Battery can take a
charge, the PWRcell Inverter will absorb the excess
production to charge the battery, again attempting to
maintain a zero reading at its CTs. Once house loads are
covered and the battery is charged, excess production
will be allowed to export to the grid.
Installation and Owner's Manual for Generac PWRCell Inverter
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
Self Supply
Sell
–
–