enphase IQ System Controller 1 Technical Brief page 19

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Verify that the line voltage at the generator terminals and connection point to the
IQ System Controller is approximately 240 V. Measure L1-L2, L1-N, and L2-N.
11. Observe the system recovery and perform the following steps.
NOTE: The installer/electrician can use the content in this section to verify system
behavior. No action from the installer/electrician is required as part of this section.
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Once the generator starts, the IQ System Controller is powered up from the generator.
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Verify the system's functioning by opening the IQ Combiner door that contains the
system's IQ Gateway and ensuring the four LEDs of the IQ Gateway are blinking red. This
indicates that the IQ Gateway is powered and is booting up. Note that if this step is
delayed, all the IQ Gateway LEDs may no longer be blinking red; however, at least one LED
will be lit with green or red color.
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Once the Gateway has finished booting up, the IQ Gateway will connect to the
IQ System Controller 1 or 2 via Zigbee, and to the IQ System Controller 3/3G via control
cable.
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The Gateway will try to connect to the IQ Batteries via Zigbee/Control bus but cannot
as the batteries will be powered down due to extremely low SoC (<2%). After a
maximum of 15 minutes (5 minutes of Gateway to boot and 10 minutes for the
Zigbee/Control bus timeout for IQ Batteries), the Gateway will command the IQ System
Controller to close the IQ Battery relay and IQ Combiner relay. You can hear an audible
click of the relay's closing. The LEDs on all the IQ Battery units will start blinking red,
indicating it is powered on via AC.
12. Turn on the right number of battery DC switches.
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For IQ Battery 3 (ENCHARGE-3-1P-NA) or 3T (ENCHARGE-3T-1P-NA) and IQ Battery 10
(ENCHARGE-10-1P-NA) or 10T (ENCHARGE-10T-1P-NA), turn on the right number of DC
switches, as described in
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For IQ Battery 5P (IQBATTERY-5P-1P-NA), the battery's power activates the IQ Battery 5P's
LED-based DC switch. If the battery SoC is less than 2%, one may be unable to turn it on,
as the IQ Battery 5P turns on automatically when the battery's state of charge is recovered
after being connected to a generator.
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The LEDs on IQ Battery units pulse softly green when charging with the DC switch on.
To verify that the batteries are charging, a current clamp multimeter can be connected
to the L1 or L2 wires from the IQ Battery and landed in the IQ System Controller.
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The batteries may take up to 20 minutes to start charging initially, and the charging rate
may be low. The charging rate will increase once the batteries have recovered to more
than 2% SoC.
•
If the batteries are still not charging after 20 minutes, as per the procedure described
above, then contact
connection (aka tunnel) to the IQ Gateway so that Enphase Support can make the
appropriate changes to the system and enable the batteries to charge.
13. Verify that the IQ Battery units have charged up to the desired SoC and, if applicable, charge the
remaining IQ Battery units.
19
State of charge recovery for an Enphase Energy System
Table 3.
WARNING: Only allow batteries per the specified table to be switched on;
switch off the remaining batteries to avoid overloading the generator. It is
recommended that all the batteries be physically disconnected and only
those intended explicitly for recovery be connected.
NOTE: Do not overload the generator. To ensure this, switch on the DC switches
in IQ Batteries based on the battery power and generator ratings. The total
energy required for charging the number of batteries must be less than the
generator's output power.
Enphase Support
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June 2024
TEB-00084-2.0