enphase IQ System Controller 1 Technical Brief page 12

13. Verify that the IQ Battery units have charged up to the desired SoC and, if applicable,
charge the remaining IQ Battery units.
•
Perform the following steps to check the IQ Battery SoC:
a. Press the Access Point, that is, the AP mode button on the IQ Gateway. The AP mode
LED should light up green in color.
b. Connect your phone to the Gateway's Wi-Fi network.
c. Open the Enphase Installer App and open the site being recovered.
d. Go to Devices and Array > IQ Battery > <serial number of IQ Battery being
recovered> Check the SoC.
e. Repeat steps c and d for all IQ Battery units that are being charged.
•
If charging during the daytime with good irradiance, one can stop charging batteries
when they reach 20% SoC. IQ Batteries can charge further from solar power.
•
At this point, the DC switches for the IQ Battery units that have finished charging to the
desired level must be turned off.
•
Repeat the process for the next set of batteries to charge and recover the SoC.
14. After the needed IQ Batteries have been charged, disconnect and turn off the generator.
•
Turn off the engine switch on the generator.
NOTE
recovered; failing to do so might leave the system stuck in a non-recoverable state.
If this happens, contact
•
Turn off the fuel valve on the generator.
•
Disconnect the generator extension cord from the L14-30R receptacle on the generator.
•
Measure the voltage of the generator connection point to the IQ System Controller. The
measured voltage should be zero volts.
WARNING: Do not touch the prongs of the L14-30P plug on the generator
extension cord. Measure the L1 to L2 voltage on the generator lugs. Ensure the
reading shows no voltage and that the lugs are de-energized before moving to the
next step.
15. Restore the system to the normal operating state by performing the following:
•
Ensure all PV breakers inside the IQ Combiner box are turned off.
•
Ensure that all Battery DC switches are turned off.
•
If there is an Enphase RSD switch, ensure it is turned off.
•
At this point, the microgrid should not exist. Measure the voltage of the IQ System Controller
bus bar and source lugs. The measured voltage should be zero volts line to line and line to
neutral.
•
Disconnect the generator L1, L2, neutral, and ground wires from the IQ System Controller.
•
Move consumption CTs to their original location, between the meter and the
IQ System Controller or the meter and the main panel.
•
Remove the L1 and L2 wires from the installed 2-pole breaker, as described in
and reinstall and wire the original AC/IQ Combiner breaker of the IQ System Controller.
•
Reinstall the IQ System Controller's dead front.
•
Ensure that the NFT breaker is turned on.
•
If there is an Enphase RSD switch, make sure it is turned on.
•
Turn on the DC switches on all IQ Batteries to black start the microgrid.
•
Ensure that only the essential backed-up loads are turned on at home.
•
Turn on the backup or supply loads breaker in the backed-up loads panel that was
turned off.
•
Verify that the IQ Batteries are discharging. The LED on each IQ Battery unit will be
pulsing blue, indicating discharge.
12
State of charge recovery for an Enphase Energy System
: Do not turn off the generator with batteries that are not adequately
Enphase Support
© 2024 Enphase Energy Inc. All rights reserved.
for further help.
Step 7,
June 2024
TEB-00084-2.0