Rural KZN Solar Home Lighting (LightBox)

Funded by environmental NGO Project 90×2030, we designed and installed 50 solar lighting kits in various rural KZN villages. This project entails an intensive program to train local residents on the basics of solar energy, as well as to maintain and repair the systems. The hope is that they can then set up businesses to supply spares and offer maintenance contracts to users. Grey Green continues to offer support to manage their new business and to provide access to spares when required.

The system components were carefully designed with the unique challenges of rural sites in mind. This included special attention to using high quality and long lasting components, such as aluminium frames and stainless steel fasteners, as well as UV protected cable. The batteries are sealed to reduce maintenance, and the 6W LED lights are expected to last more than 5000 hours.

These systems are available for purchase in large quantities. Click here to read more about our LightBox case study. Click here to see more LightBox technical information.

JHB Zoo 4kW Ground-Mounted Solar PV

This project included the installation of the 4kW system as well as retrofitting some of the animal enclosures with solar powered electric fences. The system generates approximately 25kWh’s of electricity per day, which helps to reduce electricity bills as well as reaffirm the environmentally conscious image of the Zoo. The system was designed to meet the energy needs of the Zoo’s education centre.

Energy Monitoring Systems

Grey Green Energy Meters

Grey Green Real Time Energy Measurement System – To identify and make sustainable changes to energy use in any facility, the first step is to be able to measure and benchmark energy use. The monitoring devices currently available are believed to be too expensive or far too complicated. Grey Green has therefore designed and developed a custom, locally manufactured, energy monitoring system. The units are DIN Rail mounted and measure single or three phase electricity use. The units are linked via GPRS to an online server and database where the data is processed and displayed on a customised user interface. The unit in its basic form offers simple real time electricity data reports including A, V, kW, KVA, KVAR, kWh and load factor for each and all phases. We believe that once the facility is comfortable with this basic data, the software can be upgraded by providing “packets” to include additional information such as bill verification and alerts.

Click here to see our energy monitoring system in action for one of our valued clients. (The site is best viewed using a Google Chrome browser. You can click on the site names in the table or the site locations on the map to see the site specific information.) Our energy monitoring system is measuring the power generated by the various renewable energy interventions that are installed at these sites.