Solar PV FAQ

 

Frequently Asked Solar PV Questions and Answers

 

Click question for more indepth answers on Solar PV

Why?

  • Why Do We Recommend Solar Edge?
    • Solar Edge offers a full system which includes a distributed harvesting system and an inverter by using power optimizers which are connected to each Solar PV Module.
    • Individual module monitoring, performance reporting and alerts.
    • SolarEdge Inverters includes a Monitoring Capability with the internet connection.
    • With the dedicated monitoring software, we can have the power and the data of each individual module at the same time than the Inverter send these data to the monitoring system over the internet.
    • This feature gives an ability to monitor and receives real-time feedback of the entire system, so you will know what your entire system is doing and what each module is doing.
    • With the SolarEdge monitoring software, you can view each P.V module output throughout the day.
    • It`s a browser-based and runs on the all popular browser No Special or complex software’s needed to run it.
    • In the monitoring system, you can zoom in and detect the shading effect and/ or failure.
    • SolarEdge is offering a free monitoring tool for the life of the system.
  • Solar Edge vs. Micro Inverters?
    • Both the SolarEdge power optimizer system and the Enphase microinverter system offer significant improvements over a traditional string inverter. The primary reason for these significant improvements is that both products Maximum Peak Powerpoint Track (MPPT) each PV module in the array individually. Tracking each PV module individually enables the following benefits:
      • Increased energy production by eliminating the energy loss caused by module mismatch and partial shading.
      • Multiple Solar PV Arrays, module orientations are easily supported.
      • Per module monitoring, performance reporting, and alerts.

 

How to?

  • How to Turn ON my Solar P.V System Safely?
    • You can reduce the Electrical hazards by keeping the order!The Right Sequence is the following:
      1. Turn ON the D/C Isolator switch which located next to the Solar PV Inverter or underneath if Is Integrated.
      2. Turn ON the Single Phase A/C Isolator which located next to the Solar PV Inverter
      3. Turn ON the RCD switch (Located inside your Fuse Board)..
      4. Turn ON the Main A/C Isolator next to the Distribution Board(Fuse Board).
  • How to Turn OFF my solar P.V System Safely?
    • You can reduce the Electrical hazards by keeping the order!The Right Sequence is the following:
      1. Turn Off the Main A/C Isolator next to the Distribution Board(Fuse Board).
      2. Turn Off the RCD switch.
      3. Turn Off the Single Phase A/C Isolator which located next to the Solar PV Inverter.
      4. Turn Off the D/C Isolator switch which located next to the Solar PV Inverter or underneath if Is Integrated.
  • How to Clean My Solar P.V Modules / P.V Array
    • Should I Clean My Solar PV Array?Dirt, Dust, Bird Drops on a Solar PV array can cause shading and hotspot, therefore it is important to check and clean it regularly.

      If your Solar PV gets Dirty, Your Solar PV Electricity Production also will be drop, so its in your financial interest as well.

      A Regular Manual cleaning schedule should be in place If:

      • The Solar PV Array is installed in the area which suffering from Dusty/Sandy condition (such as a beach)
      • Your Solar PV Array located close to a Bird clonally
      • If your Solar PV Array located in a Industrial Estates (sooty areas)
    • Clean Solar PV Panels in Array with clean and warm water
  • How can I Identify Solar P.V Labels and Isolators on my Solar P.V System?
    • The functions of the labels on a PV system, to Identify hazards. Each electrical equipment within the PV system should be clearly labelled with the correct identification.

 

What is?

  • What is the Effect of Shading in a Solar P.V Array?
    • The Solar Panel efficiency and output are based on the level of Sun radiation and light that is gathered by each cell.By Reducing the effect of shading from, building(s), trees and/or other obstacles can be maximised the system efficiency.The Layout of a system can help avoid the effect of shading on the module and must be considered at the design stage of the project.
  • What is the Lightning Protection in a Solar P.V Array and Why Important?
    • A P.V array is at risk from a lightning strike, therefore adequate earthling/lightning system must be installed to reduce the risk of Injury to persons or damage to the array and inverter.It`s not just your Personal Interest, The Lightning Strike Protection for Solar PV Systems in Ireland also Stated in the RECI ETCI Regulations.The array will require protection from the lightning if it is:
      • Mounted high on a structure
      • Installed in an open area
      • Covers a large area
  • What is the STC and Why is it important?
    • Standard Test Conditions or in short STC is a standard Quality Control Method, which helps the Manufacturers and the End Customers to identify the Maximum Power Point of a Solar PV Modules.So, If you buy a Solar PV Module, the Maximum Named Power on the PV Module label is decided by this STC conditions.
  • What is a Hotspot in a P.V array?
    • The Interconnected modules in the Solar PV Array must be electrically matched.The strings must generate the same voltage when connected in parallel and the same current when connected in series. 

      hotspot in a Solar PV Array

      • A mismatched module will result in a relatively high reverse current
      • This current can flow through the damaged or shaded cell creating a hotspot.
      • The module or cell will now act as an internal load
      • This Effect will cause the array to dissipate power and reduce the efficiency of the array.
  • What is the Kyoto Agreement?
    • The Kyoto Protocol is a historical agreement in that it was the first international agreement in which many of the world’s industrial nations concluded a verifiable agreement to reduce their emissions of six greenhouse gases in order to prevent global warming. The major feature of the Kyoto Protocol is that it sets binding targets for 37 industrialised countries and the European community for reducing emissions. These amount to an average of five per cent against 1990 levels over the five-year period 2008-2012.