Solar power offers many benefits to a business.
Businesses that are affected with load shedding, own their own buildings or have a long term lease can realize:
- Dependable electricity usage, which allows increased productivity
Lower and predictable utility operating costs.
- Business Tax deduction.
Reliable equipment with low maintenance costs.
Increased property value.
Solar panels demonstrate a commitment to the environment.
Solar power is a distributive power generation technology, distributive power is power generated at the point of consumption making it an excellent technology to reduce utility needs during peak hour electricity consumption.
Solar energy is one of the most cost-effective methods to not only reduce carbon emissions but to provide a business with predictable energy costs.
Our sustainable consulting services involve reducing risk in order to enhance the sustainability aspects of an organization.
We focus on businesses interested in installing solar on their company-owned or long-term leased facilities. Our services facilitates all stages of a solar project, from feasibility to solar installations.
Just Green Technologies is a PVGreenCard Certified Installer.
To verify us please go to the PV Green Card website: PV Green Card
With the PV Greencard Certified Installer status you can rely on top quality Residential and Business Solar Installations from Just Green Technologies.
PV Green Card
The PV GreenCard has been developed to promote safe and high-quality Solar PV installations. The PV GreenCard Programme focuses on education, skills development, and training to build installer capacity as well as improve standards development and compliance in line with international best practice.
The PV GreenCard is an as built report for the Solar PV system owner and a checklist for the installer which qualified installers provide to their clients on the completion of a project. The PV GreenCard contains details of the installation such as, what sort of PV modules and PV inverters were used, as well a checklist of all of the necessary installation steps that were completed.
The installer is able to use the PV GreenCard to declare compliance with relevant standards as well as safety guidelines for PV installation. This will provide investor confidence, commitment from participating industry players and empowerment of the Solar PV system owner.
What solar installations entail –
Rooftop solar/PV system Installations
The roof is protecting the building against wind, sun, rain and – in some regions – also snow. After the installation of a PV system, the proper behaviour of all functions mentioned above must be ensured for the whole life-time of the PV system. The planner and the installer must have the necessary knowledge to avoid damage to the roof and the building itself. In many cases the mechanical
installation of the mounting structure and the modules is performed by a roofer. The mechanical installation can also be done by another person – provided it is performed professionally. During the mechanical installation it is inevitable that some electrical installation will be done as well. Once the modules are mounted, there is no access to the module cables and connectors, because they are between module and roofing and therefore out of reach. The person who does the
mechanical mounting of the modules has to interconnect the modules and attach the cables. Today, most modules are equipped with cables and connectors. Therefore the interconnection of modules can be done by a trained non-electrician under supervision of an electrically skilled person – as long as there are no exposed live parts. Additional wiring and assembly of plugs must be performed by an electrician who must also ensure correct wiring of the whole PV system. The most common roof types for residential buildings in South Africa are cement tiles and corrugated iron. For most roofing types, a suitable mounting system is provided by one or more mounting-system manufacturers. The installer must know all information given by the manufacturer.
Ground mount solar/PV Installations
The same installation on roof is done on the ground.
Inverter installation and AC connection
The mounting position for the inverter depends on the ingress protection (IP) rating of the inverter. For outdoor mounting, an IP rating of at least 54 is mandatory. Even then, a sheltered installation is recommended. The necessary components in the distribution board – such as AC isolators, circuit breakers and an energy meter will be used during installation.
On sign-off certain items need to be confirmed:
– PV solar system design approved by Pr. Eng. or Pr. Tech.
– Letter of installation and commissioning approval from Eskom or municipality
– Installation was performed under the supervision of a qualified electrician according the approved design
– Electrician has to sign a certificate of compliance (CoC) for the installation
– Pr. Eng. signs off an as-built drawing, after system works as specified
– Installer or supplier provides any additional documents and reports for commissioning the PV system to client
– All requested documents must be sent to the network operator for final commissioning and operation approval
For the PV system itself, some measurements must be performed before the PV array is connected to the inverter. According to the international standard IEC 62446, for each string the measurements of Voc and Isc and a polarity and isolation check are mandatory