Savings & metering
Solar and prepaid tokens in South Africa — practical tips before you commission
Keep a token buffer, photograph the meter, and treat export as a utility project. Prepaid status does not ban solar — wrong meter class and reverse power without approval do create expensive surprises.
Updated 27 October 2026 · Illustrative ranges — not a formal quote or legal advice.
Answer first: On prepaid, treat solar and EV charging as a metering project first. Tokens, reverse power and hybrid export do not mix until the distributor confirms the meter class and tariff. Buy units with a buffer, shift flexible loads (including the wallbox) to solar midday or approved off-peak windows after any TOU migration, and never assume the disc or token register will “run backwards for profit.”
Token habits that protect the bill
- Photograph the meter (make, serial, tariff code) before any solar or EV quote.
- Keep top-up receipts / SMS history for three billing cycles after any meter change — disputes need evidence.
- Leave a rand buffer on the token before commissioning day; inverter first-start and electrician tools should not flatline the house mid-CoC.
- If the metro moves you from prepaid to TOU conventional for export (City Power’s published exporter path), rebuild your mental model: you are no longer “buying tokens,” you are managing peak/standard/off-peak.
- Program the EVSE on a schedule — overnight off-peak or solar soak — so Stage evenings and peak tariffs do not coincidentally empty the account.
What metros typically do (2026/27)
| Distributor | Export credit (illustrative, incl. VAT) | Prepaid note |
|---|---|---|
| Cape Town | ~152.93 c/kWh | SSEG + AMI rules on many Home User sites; Cash for Power is a separate residual-credit path |
| City Power | ~143.29 c/kWh | Exporters: prepaid → TOU conventional in published EG conditions |
| eThekwini | ~184.60 c/kWh | Net-billing energy credit; network access charges still apply |
| Tshwane | ~108.25 c/kWh | Confirm live credit; domestic SSEG fixed charges apply in NERSA blocks |
Sources: our feed-in and metro tariff pages, aligned to 2026/27 NERSA/metro primaries. NERSA’s Net-Billing Rules (gazetted May 2025) say export credits offset energy only — not fixed charges — and are not cash payouts under those Rules (net-billing news).
Zero-export bridge while you wait for the meter
If the utility appointment is months out, some installers commission with export limiting so reverse power never hits a non-bi-directional prepaid meter. You keep self-use savings and stay on the right side of connection rules; you forgo credits until the meter/tariff is correct. Get limiter settings and SSEG status in writing — prepaid + solar.
EV charging without token panic
A 7.4 kW wallbox draws roughly 7 kWh per hour. Four hours is ~28 kWh — about R90–R130 at R3.30–R4.70/kWh energy. That is predictable if you schedule it; it feels like a crisis if it coincides with geyser + stove + Stage recovery. Use load management and, where available, dynamic current limits — load management, TOU / prepaid EV.
Myths
- “Prepaid homes cannot go solar.” False — meter class and registration decide.
- “Tokens will spin backwards and earn free units.” Unsafe and often technically wrong.
- “Export credits cancel my service charge.” Not under NERSA net-billing design.
- “I can add a wallbox on the stove plug until SSEG is done.” Fire and CoC risk.
Week-zero checklist
- Meter photo + prepaid vs credit on every installer brief.
- Ask which meter the metro approves for your intended export mode.
- Price meter change, deposits and revisit labour as line items.
- Decide zero-export bridge vs wait-for-AMI before panels go up.
- Align EVSE schedule with the tariff you will actually be on after cutover.
App and vendor hygiene
Use official municipal or licensed vendor channels for top-ups. Screenshot confirmations. If a third-party app delays token delivery overnight while your hybrid is commissioning, you can look “offline” to the electrician for reasons that have nothing to do with the inverter. After a meter swap, buy a small token immediately to prove the new meter accepts credit before you schedule final inspection.
Geyser, pool and EV on one prepaid story
The houses that panic are the ones that add a wallbox without retiming the geyser. Move the geyser to a solar-midday or controlled window, put the pool pump on a timer, and let the EVSE take a defined overnight slice. Whole-home order of operations beats bigger inverters — heat pump + solar + EV, install order. If you later add export, remember NERSA net-billing credits do not erase fixed charges; token anxiety simply morphs into peak-period anxiety unless you schedule loads.
When Stage rotations return, expect more imports on backup nights. Size battery essentials without the car unless you deliberately oversize. Charging the EV from a small backup pack is how households discover empty SOCs at 21:00.
When to pause the solar switch-on
Pause commissioning if the meter appointment slipped, the token vendor cannot credit the new meter, or the installer wants to “just export tonight” without written permission. A one-week delay costs less than a tampering fine or a damaged prepaid register. Align the EVSE energisation with the same green light so the first big overnight charge does not coincide with a metering dispute.
If your meter is swapped mid-month, ask the utility how residual prepaid credit is handled and whether any SSEG fixed charges start immediately. Log the cutover date next to your first post-cutover bill so payback models stay honest.
Token buffer math when an EV joins the house
A 7.4 kW overnight charge can pull ~30–50 kWh before breakfast. On a prepaid meter that is a large token bite if you buy small top-ups. Keep a rolling buffer sized for two EV nights plus geyser, not “enough for the lights.” After solar is live, midday self-use should shrink daytime tokens — but winter evenings and Stage nights still import. Recalibrate the buffer the first month after wallbox commissioning rather than trusting the pre-EV habit. Pair with TOU / prepaid EV.
Export credits vs prepaid psychology
Net-billing credits on a postpaid SSEG tariff feel different from prepaid token anxiety. If the metro requires a meter change before export, plan cash-flow for the weeks you are neither exporting nor yet fluent on the new bill format. Zero-export bridges keep you legal while you wait — they do not refill tokens by magic. Model savings on avoided purchases first; treat export cents as a bonus once Homeflex or municipal SSEG is confirmed — Homeflex, feed-in.
Token timing and self-use
Prepaid customers often buy tokens when anxious, not when tariffs or solar surplus say so. If your hybrid grid-charges before a published Stage slot, ensure the meter has rand credit and that you are not charging on the most expensive incline block unnecessarily. Solar self-use still displaces the token kWh you would have bought; fixed service charges on some prepaid products do not vanish.
Log token purchases for two months alongside the hybrid app’s import/export. Patterns beat guesswork when you decide whether to add panels or usable kWh — prepaid + solar · fixed charges.
Inclining blocks and solar
Where prepaid still uses inclining blocks, self-use that keeps you out of the top block can be worth more per kWh than a thin export credit. Track whether afternoon PV is cutting the expensive units first. If the hybrid blindly grid-charges every afternoon “for Stage,” you may buy top-block tokens to fill a pack you barely discharge — flip that schedule to match published slots and surplus PV — grid-charge desk.