The kWh is a measure of energy, just like the Calorie and the Joule. Electricity generated or consumed is generally measured in kWh (or MWh for large power plants). A typical example of what a kWh represents is the following: one unit of prepaid electricity is one kWh.
To compare the consumption or production of two appliances or installations in kWh, the period over which the comparison is done must be strictly equivalent.
The kW is a measure of power. It corresponds to a Joule per second (J/s). Power is a measure of how fast something is generating or using energy. The higher a plant or building’s kW, the faster that plant or building is producing or using energy.
The power of an installation (measured in kW) is the maximum amout of energy it can generate over a period of time. The rate at which an appliance uses energy is its power, also called load or demand.
In most cases, asset managers pay municipal utility bills at site level (a site consisting of several buildings) and invoice tenants independently using the metering reticulation available in the buildings.
Both processes (municipal bills and tenant utility invoices) being separate (different billing periods, different metering points), there must be a reconciliation mechanism to ensure that all utility costs are recovered within the site: this mechanism is called cost recovery.
With rising energy costs, business are very sensitive to their energy costs. In the particular asset management industry, asset owners must ensure that they recover their utility costs from their tenants.
Recovery analysis looks at a time period and compare utility costs recovered from the tenants to the utility costs paid to the municipality. These ratios are calculated and monitored at park and building level over time.
In instances where actual metering points are not present, Energy Intelligence’s patented utility cost allocation system provides estimates of the recovery ratio. A virtual utility bill is created based on a set of business rules. The estimated value of the virtual bill is displayed graphically for the end user, and used further in establishing energy performance indicators for the site
The length of time required for an investment to recover its initial outlay in terms of profits or savings. In the energy sector, these include the cost of the initial investment and the energy savings, but also tax rebates and other incentives.
If insulation costs R11,000 and saves R5,500 a year, its payback period is two years.
If a solar PV installation costs R250,000 and saves R25,000 a year, its payback period is ten years.
Energy Intelligence is an end to end service provider focused on energy efficiency.
Energy Intelligence can manage utilities in buildings equipped with standard credit meter, prepaid meters or smart meters.
More that just meter maintenance, meter reading and billing, Energy Intelligence tracks the energy performance of the sites and ensures that they operate efficiently, particularly for the common area sections. Our engineers ensure the implementation of energy efficiency projects (lighting retrofits, timers, sensors, solar PV)
The services we provide to our clients are:
Prepaid metering is often recommended in new large residential buildings for the following reasons: