With rising electricity costs and unstable power supplies, schools are continuously challenged to manage their operational expenditure and keep the lights on for the school day and after-school activities.

Through our LED lighting, cooling, heating and solar solutions, we will help you significantly reduce your energy consumption and protect the continuity of your power supply.

Planning your Energy-Saving Road Map

It is imperative for schools to plan their energy-saving road map before a solar solution is designed. By reducing the base energy consumption rate through conversion to LED lighting and more efficient heating and cooling solutions, schools can make the most cost-effective and fit-for-purpose solar investment.

Step 1. Move old lights to LED: Average energy consumption reduction of 65%

Retro-fitting LED lights not only cuts your electricity costs significantly, but also improves the quality of lighting in classrooms, halls and on the sports field. LED lights offer benefits such as:

  • Improved efficiency: Incandescent light bulbs only use about 10% of the electricity consumed for light – 90% is wasted as heat. LED lights are 80-90% more energy-efficient than conventional light bulbs, and only give off 5% wasted heat.
  • Longer life: LED bulbs last for 35,000 to 50 000 hours vs. a maximum of 2,000 hours for incandescent bulbs and 10,000 hours for CFLs
  • Increased durability: There is no filament that can break; LEDs are also referred to as Solid State Lighting.
  • Eco-friendly: LED lights are energy efficient releasing less heat, consuming less energy and subsequently having a significantly smaller carbon footprint.

Not all LED lights are equal. When replacing lights, schools should only consider LED lights with a minimum of 5 years warranty, a power factor better than 0,9 and a minimum efficiency of 130 lumens per watt. They should carry a trusted certification mark such as CE (European) or SABS. ALT-SA lights are designed specifically for largescale applications where durability and efficiency are top priorities.

Step 2. Convert to more efficient heating and cooling solutions: Average energy consumption reduction of 50%
  • Old technology air conditioners run at full power regardless of conditions in the environment. Our inverter based airconditioning units use up to 50% less energy due to sensor and variable speed capability.
  • Heat pumps can be up to three times more efficient than electrical geysers. For every kWh of electricity supplied to the heat pump, more than three kWh of thermal energy in the form of hot water is produced. A thermostat will keep the hot water at a constant temperature of 55°C.*
Step 3. Harvest the power of the sun with solar

South Africa is blessed with abundant sunshine and a school roof is the perfect place to utilise it!

  • A roof-top photovoltaic (PV) system comprises electricity-generating solar panels which are mounted on the rooftop of buildings exposing them to solar radiation (called the Photovoltaic Effect).
  • Power generated by the sun flows via solar reticulation to an inverter converting the direct current to alternating current, and feeds into the internal electrical network of the school.
  • The inverter also synchronises the power generated from the roof with the power received from Eskom. If more power is required than what the system is generating, the inverter feeds in sufficient power from Eskom. Every kilowatt hour (kWh) generated by the system is a kWh less used from Eskom.
All three steps can be financed should the school wish to preserve its capital reserves. Savings typically outstrip the monthly finance charges.
Hoërskool Waterkloof, Pretoria – LED Lighting

Waterkloof converted to LED technology by replacing 2,213 globes including 120 sports field floodlights.

R 1 232 955 Total cost of project fully installed
ROI of 28 months The conversion will pay for itself in 28 months
70% kWh consumption saving per month
R 494 059 Savings Year 1 (R 137 191 with the finance option)
R 3 028 582 Savings Over 5 Years
(R 1 056 661 with the finance option)

Solar, Generator & UPS Solution

Waterkloof also invested in a 30 kVA solar system as its first phase of a multi-phase conversion to solar power. The school added a 100kVA diesel generator and a range of UPS battery backup units to keep key systems running during periods of extended load shedding.

Royal Schools, Gauteng

Royal Schools group converted to LED technology in their Princess Park and Queens campuses by replacing 1,906 globes and tubes.

R 442 030 Total cost of project fully installed
ROI of 26 months The conversion paid for itself in 26 months
67% kWh consumption saving per month
R 14 860 Financial saving per month in year one
R 187 201 Savings Year 1
R 1 098 232 Savings Over 5 Years
Paarl Boys High in Paarl, Cape Town

Paarl Boys High converted to LED technology by replacing 924 globes including 44 sports field floodlights and saved 70% on the cost of their lighting!

R 284 000 Total cost of project fully installed
ROI of 18.5 months The conversion paid for itself in 18.5 months
70% kWh consumption saving per month
70% Saved 70% on the cost of lighting
R 14 860 Financial saving per month in year one