In South Africa, “net metering” is often used to describe any situation where solar customers can feed electricity back into the grid and get some kind of credit. In practice, though, what you get depends on who supplies your electricity (a municipality or Eskom) and what tariff and export rules exist in your specific supply area. Many South African programmes operate closer to net billing than classic net metering: your meter records imports and exports separately, and exports are credited at a rate that is usually different (often lower) than the retail rate you pay for imported electricity.
At the heart of it is a simple idea: during the day your PV system supplies your building first. If you generate more than you use, that surplus can flow outward to the grid only if export is allowed and enabled. At night (or when PV is low), you import power as usual. The key is that the utility needs to measure energy in both directions properly, which is why bi-directional metering and the correct customer tariff are such a big deal.
Why “net metering” isn’t one national rule in South Africa
South Africa does not have a single nationwide, one-size-fits-all residential net metering programme. Net metering isn’t widely available throughout South Africa yet. The regulatory layer (registration requirements for grid-connected embedded generation) is national, but the commercial layer (whether you may export, what you earn per kWh exported, what meter you must install, and what fixed charges apply) is largely set by your local distributor and their tariff schedules and policies. That’s why two customers in different municipalities can have completely different outcomes, even with the same solar system.
What is consistent is the growing emphasis on legal registration for grid-tied systems. NERSA’s recent clarification makes it explicit that registration requirements depend on capacity and whether there is a point of connection to the grid not simply whether you export power. Systems 100 kW or less with a grid connection must register with the relevant distributor (Eskom or the licensed municipality). Systems above 100 kW with a grid connection must register directly with NERSA, while fully off-grid systems without a point of connection are treated differently.
If you are in an Eskom supply area, Eskom’s own guidance is very direct: all households and small businesses with systems below 100 kVA must register with Eskom, even if they do not export electricity. Eskom also explains why they care parallel generation can back-feed lines, endanger workers, damage equipment, and disturb voltage/power quality if it’s not correctly installed and configured.
The meter is the “engine” of net metering (and why “bi-directional” matters)
If a distributor allows export, they still need to bill and credit you accurately. That requires a meter that can measure electricity flowing into your property (import) and flowing out to the grid (export). South African SSEG metering guidance for municipalities is clear: to enable SSEG on municipal grids, electricity meters must support bi-directional metering with separate import and export registers.
Some municipalities go even further and require what’s often called “four-quadrant” metering (which can measure import/export and reactive energy in different directions). For example, Ekurhuleni’s tariff documentation notes that a 4-quadrant bi-directional AMR meter is the only means they accept to measure generated/exported excess units for credit, and it ties eligibility for credit to being registered and compliant with the city’s embedded generation policy.
This is also where many customer expectations go wrong: if you don’t have the right meter (or you’re not on the correct programme/tariff), your exported energy may not be credited the way you assume or export may be disabled entirely through a “non-export” configuration.
Why certified grid-tied equipment is non-negotiable
Grid connection isn’t just a billing issue; it’s also a safety and power-quality issue. That’s why distributors lean heavily on standards and compliance requirements for the “utility interface” (the part of your system that synchronises and connects to the grid). NRS 097-2-1:2024 sets out requirements for the utility interface for the interconnection of small-scale embedded generators operating in parallel with the utility network, focusing on the AC side and technology-neutral requirements.
From a practical perspective, this translates into rules around anti-islanding (disconnecting when the grid is down), voltage/frequency operating windows, and protection settings plus expectations that installers provide correct documentation and certificates. Eskom’s own warnings about back-feed and power quality reflect exactly the kind of risk these requirements are meant to prevent.
What you can realistically expect on your bill
Even where export is allowed, most customers should not think of net metering as “the meter running backwards” at the same price they pay. Instead, you usually get a structure that looks like: you pay retail rates for what you import, and you receive a credit (or payment) for what you export at a programme-specific feed-in rate. The gap between those rates is why the best returns usually come from self-consumption first (using your solar directly on-site), with exports as a secondary benefit.
A good example of how municipalities present export compensation is the City of Cape Town’s published tariffs and supporting documents, which list a Residential SSEG feed-in tariff and a separate SSEG incentive for a defined period (tariffs are reviewed and updated through the annual budget cycle).
In Cape Town, exported energy is credited and offset against the customer’s municipal account, and the City’s FAQs describe how customers may receive cash payouts under the “Cash for Power” approach once remaining credit exceeds a threshold.
Cash for Power and payouts: when “selling back” can become real money
Cape Town is one of the better-known examples of a structured pathway from bill credits to potential payout. The City’s SSEG FAQs state that export credits are offset against the customer’s monthly municipal account, and that under “Cash for Power” customers with remaining credit after offset can be paid out once the amount exceeds R5,000, subject to the required application steps.
Cape Town’s generic SSEG supplemental contract also notes important details customers often miss, including that VAT on exported energy is only payable by the City where the customer is registered as a VAT vendor, and that participation in “Cash for Power” comes with required processes.
The key takeaway is that “selling back” is not automatically cash in hand. In many cases it starts as an account credit, and only becomes a payout under specific programme rules.
A simple way to think about whether net metering helps you
If your business or household uses most of its electricity during daylight hours (offices, retail, workshops, farms with day pumping), then net metering-style export is usually less central because you can consume a bigger share of your solar directly. If your daytime consumption is low and your PV system is large, exports become more relevant but the value still depends on your local feed-in tariff, your fixed charges, and whether your distributor allows export at all.
That’s why it’s worth treating export as an “extra,” not the whole business case. Design your system around the load profile, compliance requirements, and the tariff structure in your area, then evaluate export credits as a bonus where your distributor supports them.
Net metering in South Africa can be a real benefit, but it isn’t a single national system. The value you get depends on your local distributor’s rules, the tariff you’re on, and having the correct bi-directional meter and approvals in place. In most cases, the best returns still come from using your solar power on-site first, with export credits as an added bonus where they’re available. The safest approach is to design for your load profile, register the system correctly, and treat grid feed-in as part of a compliant, well-structured energy plan not a shortcut to “free power.”
