SolarEdge Power Optimizer User Manual

Appendix A: Troubleshooting
SolarEdge Power Optimizers Installation Guide – MAN-01-00112-1.2
19
For Installations with Non-SolarEdge Inverters
Problem
Possible Cause
Diagnostics/Possible Solution
String voltage is 0V
Output of one or more power
optim
izers is disconnected
Check/connect all power optimizer
outputs
PV Modules are connected to
power optimizers with reversed
polarity
Check the PV module polarity using a
voltmeter, and correct if needed
Fuse is blown / DC circuit breaker
is disconnected
Replace the fuse, or connect DC
circuit breaker. The Fuse/Circuit
breaker should support current of
15A or higher
String voltage is lower
than minimum input
voltage of the inverter
Insufficient number of modules
in the string
Verify that the number of
modules
connected in the string is according
to the inverter's design rules.
Refer to the Inverter Manual or PV
module datasheets to determine
minimum string length
One or more of the power
optimizers are not connected in
the string
For installation wit
h safety &
monitoring interface:
1.
Turn OFF the SMI
2.
Wait ~30sec until all optimizers
are in SafeDC mode
3.
Measure the string output using
a voltmeter
4.
If the string output is less than
the number of optimizers, check
and/or connect all power
optimizers
5.
Conduct pairing
For installations without safety &
monitoring interface
- check /
connect all power optimizers
Wrong polarity connection on
one of the strings
Check polarity of the string output
using a voltmeter and correct if
needed.
One or more of the modules are
not connected properly to their
power optimizer inputs
For installation with safety &
monitoring interface:
1.
Turn OFF the SMI
2.
Wait ~30sec until all optimizers
are in SafeDC mode
3.
Measure the string output using
a voltmeter

SolarEdge Power Optimizer Specifications

General

Maximum Efficiency	99.5%
Input Voltage (Maximum Absolute)	60V
Maximum Input Current	15A
Weighted Efficiency	98.8%
Safety & Standards Compliance	IEC62109
Operating Temperature Range	-40°C