System types
Hybrid vs off-grid solar in South Africa — what’s the difference?
A hybrid system stays connected to the municipal or Eskom grid so you can cut imported kWh, ride time-of-use tariffs and still use batteries for evening peaks or outages. A true off-grid system is designed to run without a grid point of connection — larger storage, more conservative loads, and different compliance. Most SA suburbs want hybrid.
Updated 26 October 2026 · Illustrative ranges — not a formal quote or legal advice.
Answer first: If you still have a municipal or Eskom meter, you are almost certainly shopping for a hybrid (grid-parallel) system — even if marketing says “go off-grid.” True off-grid means designing autonomy without that meter. Pretending otherwise creates unsafe, non-compliant plants.
Hybrid value
- Slash import kWh at retail rates.
- Optional export credits (~108–185 c/kWh incl. in big metros).
- Battery for Stage 6 essentials.
- Known SSEG pathway — steps.
Off-grid value
- Farms, lodges, plot & plan without a connection.
- Needs bigger PV+battery, generator planning, ruthless load control.
- Different registration logic when no grid parallel exists — still need safe electrical work and CoC for the installation.
Battery sizing differs
Hybrid homes often target 5–15 kWh usable for essentials — Stage 6. Off-grid may need days of autonomy.
Inverter choice
Hybrids need NRS 097-2-1 when grid-tied — hybrid vs string, brands.
SA caveats
Some sellers misuse “off-grid mode” (backup islanding) as “off-grid system.” Ask which definition they mean.
Quick FAQ
Can I cut the grid later? Only with a deliberate redesign and load plan.
Is hybrid less reliable? No — it adds options.
Generator? Interlock properly — ATS.
Savings framing for this decision
Metro residential export credits in 2026/27 sit near 108–185 c/kWh incl. VAT (Cape Town ~152.93, City Power 143.29, Tshwane ~108.25, eThekwini ~184.60) while imported kWh often cost several rand. Designs that raise self-consumption beat designs that chase export. Fixed network charges remain after solar — model them. EV households should price home AC charging (often roughly R53–R85 per 100 km at typical residential rates) separately from public DC (often ~R6–R8/kWh, with documented outliers such as SAEV Richmond ~R3.49/kWh vs GridCars ~R7.35 per DriveElectric).
Compliance framing for this decision
Grid-parallel systems need NRS 097-2-1 type-tested inverters, a CoC to SANS 10142, and usually SSEG registration with the distributor (≤100 kW) or NERSA (above). EV wallboxes need dedicated circuits and registered-person commissioning (SANS 10142-1 clause 6.16.8 context in the Ed. 3.3 draft enquiry text). Skipping paperwork to “save time” is how projects stall at the municipal desk or fail insurance scrutiny.
Stage 6 framing for this decision
Size usable battery kWh to essentials (lights, connectivity, fridge, selected plugs) before luxury loads or EV charging on the backup bus. A 5–15 kWh usable LFP band covers many suburban essential scenarios depending on hours and whether PV can recharge between stages. Do not empty the house battery into a car unless the hybrid was deliberately oversized for that behaviour.
Quote hygiene
Require a single-line diagram, labour vs hardware split, NRS certificate PDFs, warranty PDFs, and written SSEG responsibility. Photograph the DB before works. Keep serial numbers and app credentials in one cloud folder. Re-read municipal tariff annexures every July.
Putting the wider desk numbers to work
Four recurring figures: export credits ~108–185 c/kWh incl.; home EV energy often R53–R85/100 km; ~7 kW wallbox all-in often R17k–R35k+; NERSA ≤100 kW distributor path. Use them as sanity checks when a salesperson’s spreadsheet drifts into fantasy. Compare two compliant quotes on the same load profile rather than hunting grey-import bargains without support.
Practical next steps (1)
Write down your tariff code, last 12 months of kWh, main breaker size, and roof photos. Send the same pack to two installers. Ask each to state usable battery kWh, export assumptions, and whether prepaid migration applies. For EV add-ons, confirm load management and CoC line items. Schedule estate approvals before scaffolding. After commissioning, verify monitoring for a full sunny week and one shedding evening. If numbers diverge from the quote model by more than a little, call the installer while retention is still open.
Practical next steps (2)
Write down your tariff code, last 12 months of kWh, main breaker size, and roof photos. Send the same pack to two installers. Ask each to state usable battery kWh, export assumptions, and whether prepaid migration applies. For EV add-ons, confirm load management and CoC line items. Schedule estate approvals before scaffolding. After commissioning, verify monitoring for a full sunny week and one shedding evening. If numbers diverge from the quote model by more than a little, call the installer while retention is still open.
Practical next steps (3)
Write down your tariff code, last 12 months of kWh, main breaker size, and roof photos. Send the same pack to two installers. Ask each to state usable battery kWh, export assumptions, and whether prepaid migration applies. For EV add-ons, confirm load management and CoC line items. Schedule estate approvals before scaffolding. After commissioning, verify monitoring for a full sunny week and one shedding evening. If numbers diverge from the quote model by more than a little, call the installer while retention is still open.
Practical next steps (1)
Write down your tariff code, last 12 months of kWh, main breaker size, and roof photos. Send the same pack to two installers. Ask each to state usable battery kWh, export assumptions, and whether prepaid migration applies. For EV add-ons, confirm load management and CoC line items. Schedule estate approvals before scaffolding. After commissioning, verify monitoring for a full sunny week and one shedding evening. If numbers diverge from the quote model by more than a little, call the installer while retention is still open.
Practical next steps (2)
Write down your tariff code, last 12 months of kWh, main breaker size, and roof photos. Send the same pack to two installers. Ask each to state usable battery kWh, export assumptions, and whether prepaid migration applies. For EV add-ons, confirm load management and CoC line items. Schedule estate approvals before scaffolding. After commissioning, verify monitoring for a full sunny week and one shedding evening. If numbers diverge from the quote model by more than a little, call the installer while retention is still open.
Practical next steps (3)
Write down your tariff code, last 12 months of kWh, main breaker size, and roof photos. Send the same pack to two installers. Ask each to state usable battery kWh, export assumptions, and whether prepaid migration applies. For EV add-ons, confirm load management and CoC line items. Schedule estate approvals before scaffolding. After commissioning, verify monitoring for a full sunny week and one shedding evening. If numbers diverge from the quote model by more than a little, call the installer while retention is still open.