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Ten Common Questions About Water and Electricity Billing in South Africa

Water and electricity bills should be straightforward: you use a resource, your consumption is measured, and you pay for what you use.

In practice, utilities billing can be considerably more complicated, especially if you haven't actually taken a closer look at your monthly / prepaid bill in order to understand what you're actually paying for.

Different tariffs, meter types, estimated readings, prepaid and post-paid systems, shared supply infrastructure and unexplained changes in consumption can all leave you wondering whether your monthly utility costs are correct.

Professional utilities management aims to bring greater visibility and accountability to this process by accurately measuring consumption, applying the relevant tariffs and giving consumers better access to information about how their water and electricity are being used.

At Mawenzi Utilities Management, many of the questions we encounter come down to three things: How much did I use? How was I charged? And how can I take better control of my consumption?

Below we answer ten of the most common questions consumers may have about utilities billing.

1. How Is My Water or Electricity Bill Calculated?

Your utility bill is generally based on the amount of water or electricity recorded by your meter during a specific billing period, together with the tariff applicable to that supply.

For electricity, consumption is normally measured in kilowatt-hours (kWh).

Water consumption is generally measured in kilolitres (kL).

The applicable rate is not necessarily identical for every consumer. Tariffs may vary according to the municipality or electricity supplier, property category, type of supply, tariff structure and level or timing of consumption (peak or off-peak usage).

It’s also good to take note that other authorised fixed or service-related charges may also form part of an account (i.e. Fixed Admin Fees, Meter Reading Fees, Fixed Sanitation Charges, etc.).

This is why looking only at the total rand amount on your account does not always tell you the full story.
A useful utility statement should help you understand:

- Your opening and closing meter readings
- Your consumption for the billing period
- The applicable tariff
- Relevant fixed or service charges
- Previous balances or payments
- The total amount payable

Transparent billing gives consumers the ability to understand where their costs originate.

2. Why Is My Utility Bill Higher This Month?

Consumption often changes according to the season you're in (summer or winter), occupancy rates (are there more people staying at your property?) and household or business behaviour.

Electricity consumption may increase because of:

- Heaters and electric blankets during winter
- Increased geyser usage
- Air conditioning
- Pool pumps
- Additional occupants
- New appliances

Water usage can increase because of:

- Irrigation
- Swimming pools
- Additional occupants
- Leaking toilets or pipes
- Taps left running
- Changes in gardening requirements

A higher bill does not necessarily mean that something is wrong.

The first step should therefore be to compare your actual consumption, rather than simply comparing one month's rand value with another.

Something to also note is that tariff increases may also result in a higher bill even if consumption remains relatively constant.

3. What Is the Difference Between an Actual and an Estimated Meter Reading?

An actual reading is taken from the physical or smart meter and represents the recorded consumption at a particular point in time.

An estimated reading is an approximation of consumption where an actual reading was not available.

Estimated readings can sometimes create confusion because actual consumption may ultimately be higher or lower than the estimate. When an actual reading is eventually obtained, a reconciliation may result in a noticeable adjustment to the account.

Smart metering helps reduce reliance on manual meter readings because consumption information can be transmitted automatically to the utilities-management platform.

This creates greater visibility and allows billing to be based more consistently on recorded consumption, meaning greater billing accuracy.

4. What Is a Smart Meter and How Does It Improve Billing?

A smart meter is a digital meter that records water or electricity consumption and communicates that information to a utility-management system.

Unlike a conventional meter that generally requires somebody to physically read it, smart meters can provide consumption information remotely.

Depending on the system, smart metering can help:

- Record actual usage more accurately
- Reduce manual meter-reading errors
- Identify unusual consumption patterns
- Provide consumers with greater visibility
- Improve billing accuracy
- Detect possible leaks or abnormalities sooner

For estates, complexes and businesses, this creates a clearer relationship between what was consumed and what was billed.

Mawenzi uses smart metering technology to help clients monitor their water and electricity consumption and better understand their utility costs. You can read more about what Smart Metering entails, here.

5. What Is the Difference Between Prepaid and Post-Paid Utilities?

With prepaid utilities, you purchase water or electricity credit before consuming it.

With post-paid utilities, consumption is recorded first and thereafter you receive an invoice for your consumption.

Prepaid systems offer consumers greater day-to-day control because they can see how quickly their available credit is being used and adjust their behaviour accordingly.

Post-paid systems can also provide accurate and transparent billing when supported by reliable metering and proper consumption records.

Neither system is automatically right for every property.

The most appropriate solution depends on factors such as:

- Property type
- Number of consumers
- Management structure
- Cash-flow requirements
- Metering infrastructure
- The needs of owners and tenants

Mawenzi provides both prepaid and post-paid smart metering solutions. To find out more about these two options of payment, read our article on the topic.

6. Why Do Electricity and Water Tariffs Change?

Electricity and water tariffs are reviewed periodically by the relevant supply authorities (government) and municipalities.

For electricity, tariff structures may also differ according to the type of connection or customer category.

A change in your tariff can therefore affect the amount you pay even if your consumption remains unchanged.

This is an important reason to compare usage in kWh or kL, rather than only comparing the final monetary value of consecutive bills.

A utilities-management provider such as Mawenzi aims to help ensure that the appropriate tariff structures are applied when allocating consumption costs to consumers.

7. Can a Smart Meter Help Identify a Water Leak or Unusual Electricity Consumption?

Yes, consumption data can be extremely useful in identifying abnormal usage.

Imagine that a household normally uses 12 kL of water per month but suddenly begins consuming 25 kL without any obvious change in behaviour.

The increase in consumption signals that there's increased consumption taking place in some way or another, and if this is not due to known circumstances, you may have a water leak somewhere within your water system, which needs to be investigated. 

Potential causes could include:

- A leaking toilet
- A burst underground pipe
- A faulty irrigation system
- A dripping tap
- An incorrectly operating appliance or system

The same principle applies to electricity. 

Monitoring consumption patterns allows unusual changes to be investigated sooner rather than waiting until a surprisingly high bill arrives.

Accurate metering does not repair the leak or faulty appliance, but it provides the information needed to identify that something may be wrong.

8. Why Is Individual Metering Important in Estates and Sectional Title Schemes?

Individual metering allows the consumption of each unit to be measured separately, as opposed to collectively and then the total bill for the entire scheme being split evenly amongst properties.

Individual metering creates a much fairer basis for billing than simply dividing a bulk utility account across several properties without regard to what each household or business actually consumed.

For example, if one household uses significantly more water than its neighbour, individual metering allows that difference to be reflected in their respective accounts, as opposed to the neighbour using less water subsidising the account of the neighbour using excessive amounts of water.

Individual metering can therefore help:

- Reduce cross-subsidisation between users
- Improve transparency
- Encourage responsible consumption
- Identify high usage at unit level
- Reduce billing disputes

The basic principle is simple: Measure individual consumption so that individual users can be billed according to their actual usage.

One of our recent articles covers the topic of the benefits of individual water metering systems in Sectional Title Schemes, which you can read here.

9. How Can I Keep Track of My Water and Electricity Usage?

The most effective way to manage utilities is to monitor consumption consistently rather than waiting for the monthly bill.

Where suitable smart-metering infrastructure is installed, digital platforms (such as the Mawenzi App) can give consumers greater visibility into their consumption and account information.

Through our app, customers can access utility information, monitor account balances and, where applicable, manage prepaid purchases.

Regular monitoring allows you to answer important questions such as:

- Am I using more electricity than last month?
- Has my water consumption suddenly increased?
- Am I approaching my normal monthly budget?
- Is my usage changing at particular times?
- Could there be a leak or other abnormal consumption?

Visibility turns utility management from a reactive process into a proactive one.

10. What Does a Utilities Management Company Actually Do?

A professional utilities-management company such as Mawenzi provides a trusted billing and administrative services platform for customers (i.e. housing estates), where customers receive accurate monthly billing and enquiries are dealt with professionally, negating the need for dealing with the uncertainty which accompanies dealing directly with municipal billing.

Depending on the property and service arrangement, this can include:

- Electricity and water metering
- Smart-meter installation and management
- Prepaid and post-paid systems
- Meter-reading management
- Billing and invoicing
- Consumption monitoring
- Credit control
- Network audits
- Identifying possible losses or inefficiencies
- Consumer support and reporting

For an estate, landlord or business, this can significantly reduce the administrative burden associated with managing multiple utility users.

For the individual consumer, it provides something equally important: greater clarity about what you are using and what you are paying for.

Quality Information Creates Better Utility Management

Many billing disputes begin when uncertainty arises.

Accurate metering, transparent billing and easy access to consumption data help to close that information gap, and create trust.

Whether you manage a sectional title scheme, residential estate, commercial property or your own household, understanding your utility consumption puts you in a far stronger position to control costs and identify potential problems early.

Mawenzi Utilities Management provides smart water and electricity metering, billing, invoicing, credit-control and network-audit solutions designed to make utilities simpler, more transparent and easier to manage.

Know what you use. Understand what you are paying for. Take control of your utilities!

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