Malfunction
Possible Cause and Corrective Action
String Voltage is higher than number
of Power Optimisers
WARNING!
If the measured voltage is too
high, the installation may not
have a safe low voltage.
PROCEED WITH CARE! A
deviation of ±1% per string is
reasonable.
Extra Power Optimiser(s) connected in the string
(not applicable to smart modules).
Check if an extra Power Optimiser is connected
in the string. If not – proceed to next solution.
A module is connected directly to the string,
without a Power Optimiser (not applicable to
smart modules).
Verify that only Power Optimisers are connected
in the string and that no module outputs are
connected without a Power Optimiser. If the
problem persists, proceed to the next step.
Power Optimiser(s) malfunction.
1. Disconnect the wires connecting the Power
Optimisers in the string.
2. Measure the output voltage of each Power
Optimiser to locate the Power Optimiser that
does not output 1V safety Voltage. If a
malfunctioning Power Optimisers located,
check its connections, polarity, module, and
voltage.
3. Contact SolarEdge Support. Do not continue
before finding the problem and replacing the
malfunctioning Power Optimiser. If a
malfunction cannot be bypassed or resolved,
skip the malfunctioning Power Optimiser,
thus connecting a shorter string.
Single Phase Energy Hub Inverter MAN-01-00812-1.1
60
Power Optimiser Troubleshooting
