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Commissioning
8 900-0020-01-00 Rev A
After programming (if any) is completed, perform the following steps:
1. If other inverters are on the system, use a DVM to verify correct voltage from the L1 OUT terminal
on one inverter to the next. When stacked in parallel, the wires from one inverter to the next
should read 0 Vac (although individually they should still read 120 Vac with respect to neutral).
Repeat for the L2 OUT terminal.
2. Close the AC output circuit breakers. If AC bypass switches are present, place them in the normal
(non-bypass) position. Do not connect an AC input source or close any AC input circuits.
3. Use a DVM to verify correct voltage at the AC load panel.
4. Connect a small AC load and test for proper functionality.
5. Close the AC input circuit breakers and connect an AC source. Using a DVM, check the appropriate
L1 and L2 IN terminals for 120 and 240 Vac. If a MATE3 system display is present, confirm that the
inverter accepts the AC source as appropriate for its programming. Check the system display
indicators for correct behavior.
6. If the battery charger has been enabled, confirm that it is charging by using the MATE3. The
inverter will perform a full battery charge when first powered up. This may take several hours. If
restarted after a temporary shutdown, the inverter may skip most or all of the charging cycle.
7. Test other functions which have been enabled, such as generator start, selling, or search mode.
8. Compare the DVM’s readings with the MATE3 meter readings. If necessary, the system display’s
readings can be calibrated to match the DVM more accurately. AC input voltage, AC output
voltage, and battery voltage can be calibrated.
Powering Down
If steps are inapplicable, they can be omitted. However, it is highly recommended that all applicable
steps be performed in the following order.
To Power Down the System:
1. Turn off all load circuits and AC input sources.
2. Turn off all renewable energy circuits.
3. Turn each inverter OFF using the MATE3 system display or external switch.
4. Turn off the main DC overcurrent devices for each inverter.
Adding New Devices
When adding new devices to the system, first power down the system according to the preceding
instructions. After adding new devices, perform another functional test, including programming.
Firmware Updates
Updates to the Radian’s internal programming are periodically available. If multiple inverters are used
in a system, all units must be upgraded at the same time. See the MATE3 Owner’s Manual for details.
IMPORTANT:
All inverters will shut down during software updates. If it is necessary to run loads
while updating the firmware, bypass the inverter with a maintenance bypass switch
(if present). During this time, communication cables must remain connected and DC
power must remain on. Lack of network communication will cause the update to fail
and the inverter(s) may not work afterward. Inverters automatically update one at a
time. Updating each inverter requires about 5 minutes.