the system to Optimizers SolarEdge
Studies show that many systems produce less than budgeted for various reasons. The
SolarEdge power optimizers can recover this lost energy, making the systems
statistically better performing PV from a minimum of 5% up to a 25%.
The main causes of loss of production are:
3) Thermal effect;
4) Aging of the modules;
1) Decoupling = Loss of Power
The traditional inverters calculate the MPPT (Maximum Power Point Tracking) for the whole string. Because of
decoupling between the modules, the weakest influence the production of the entire string or are
In fact, if a module within a string has a current (I) lower than the other, the entire string
He receives the lower current; which results in a loss of power.
2) Energy Losses for Dirt
In the case of partial shading, dirt because the reduction of the illuminated area in the modules. The dirt
It can come from anything falling on the panels: leaves, dust, etc.
It is lost on average between 3% and 5% of energy for misalignment between dirty modules.
3) Energy losses -
The different operating temperatures of the modules create decoupling and a consequent loss of
Energy up to 2%.
4) Aging of the modules
Often it does not tend to consider that the non-
decoupling between the modules (about 12:12% of the annual energy losses).
5) Partial Shade
Shading is virtually inevitable in PV systems (shadows between the strings, obstacles, clouds etc.), With
energy losses up to 25%.
Despite the continued evolution of the Inverter (increasing efficiency, creating Inverter with multi
MPPPT, it is impossible to eliminate losses due to shading going to affect
on the production of the entire string. With the optimizer can limit the problem to the individual module
So, to sum up the main causes of energy loss are:
Power optimizers decrease energy losses due MPPT at the module level, in fact,
Unlike centralized MPPT, SolarEdge optimizers calculate the MPPT at the module level; there
current and the voltage of each module is adjusted so as to have the same ampere circulating on
the entire string.
PHOTON confirms an energy gain in any scenario thanks to the power optimizers
Just connect an optimizer to each module. The installation is done by the method
Plug & Play (no need to change wiring or configure the inverter).
The only things you can do are the minimum and maximum length of optimizers for each string
They can be connected to the SolarEdge Inverter:
Monitoring (in modular level)
SolarEdge allows you to simply monitor the technical and economic performance of the plant
complete view of system performance and troubleshoot problems remotely:
A big advantage: Safe DC
Safety during installation, maintenance, fire or other emergencies. Current reduction and
DC voltage at the module level. in case of malfunction, fire or other problems, you can work
on housing because, by detaching the downstream installation, each optimizer will not produce more than 1 Volt DC,
thus making absolutely safe operation.
The new Independent Power Optimizers:
Independent optimization of technology (IndOP ™) can work with any inverter
Traditional (no additional hardware). It is compatible with all types of modules (c-
Easy d 'installation
The installation is entirely similar to the normal power optimizers.
To ensure a safe voltage during installation, the power optimizers
SolarEdge IndOPTM are delivered in "Safety" mode, ie with a voltage of
output of 1 volt.
The SolarEdge Key activates the once installed power optimizers (so necessary
the optimizer IndOPTM activation).
Safety and Monitoring Interface
The Safety and Monitoring Interface (SMI 35) serves to communicate the new
optimizers IndOPTM with inverters from other manufacturers. The SMI will be 35
You can monitor the module-
safety even on the DC line.
In summary the main features:
performance optimizers installed on the modules of the portal
2. SafeDC ™: reduces the string voltage to safe levels
for maintenance operations or in case of emergency;
3. Communication via Ethernet, RS485, RS232 or ZigBee.
Considering crystalline silicon modules, the SMI has a limit 3 input strings and 35Adc outgoing,
then in the best case it is possible to log on for each MPPT of a conventional inverter 17kWp (eg: 3
strings of 22 modules 255Wp).
N.B. In the event that is purchased Safety &
Monitoring Interface you must NOT use the
SolarEdge Key. The SMI addition to the characteristics above
listed may also trigger IndOPTM
Using IndOP ™ no inverter functionality used is changed (power limits,
reaction power, islanding, etc.). The only effect that the IndOP ™ technology produces is on the PV modules
which they work each according to its own MPP, instead of only one MPP same for the entire string.
The benefits of IndOP ™ are quite similar to those of the traditional SolarEdge system. Use the same
calculation algorithm, the same precision of calculation, have the possibility of different point of the peak and the speed
tracking is dynamic according to the MPPT algorithm inverter.