Two questions decide whether off-grid makes sense: what the grid charges you per unit, and what a system costs to build. Both have real numbers in 2026, so there is no need to guess.
What the grid charges here
Wilderness is supplied by George Municipality. From 1 July 2026 the domestic single-phase tariff is R3.7131 per kWh including VAT (322.88 c/kWh excluding), plus a R132.92 monthly basic charge and a capacity charge of R6.98 per amp — so a 60 A home pays R481.62 a month before it uses a single unit. The prepaid 20 A tariff is R4.2678 per kWh with no fixed charge. George raised domestic tariffs by 7.88% on 1 July 2026.
| Monthly use | Domestic 60 A | Domestic 40 A | Prepaid 20 A |
|---|---|---|---|
| 300 kWh | R1,728 | R1,568 | R1,280 |
| 500 kWh | R2,471 | R2,311 | R2,134 |
| 900 kWh | R3,956 | R3,796 | R3,841 |
| 1,200 kWh | R5,070 | R4,910 | R5,121 |
| 1,500 kWh | R6,184 | R6,024 | R6,402 |
All figures including VAT, from the George Municipality 2026/27 tariff book. A home using 900 kWh a month is paying about R47,500 a year for electricity.
What the parts cost
- Panels: R3.00–R4.50 per watt for Tier 1 modules (Canadian Solar, JA, Longi, Trina, Jinko), so a 550 W panel is roughly R1,650–R2,475.
- Batteries: R4,000–R6,000 per usable kWh for 48 V lithium. A 5 kWh battery is R17,000–R35,000; 10 kWh is R45,000–R70,000.
- Installed off-grid systems: roughly R130,000–R200,000 for an 8 kW inverter with 10–15 kWh of storage and 12+ panels, according to South African installer pricing guides for 2026.
Add the parts nobody quotes for: a borehole and pump if you do not have one, water storage, a gas install, and the backup generator you will want for the two weeks a year the weather wins.
The arithmetic, honestly
A R180,000 system against a R47,500 annual bill is a payback of under four years — but only if the system actually carries your load. If you keep the geyser and the stove on electricity and buy the smallest system that fits the budget, you will be buying grid top-ups and diesel, and the payback never arrives. Size for winter (see solar sizing for the Garden Route), cut the load first, and the numbers work.
And the grid price does not stand still: George’s 7.88% increase this year follows the pattern of the last decade. Every year you wait, the system you should have bought gets relatively cheaper.
Sources
- George Municipality Tariff Book 2026/2027 and NERSA’s decision on George’s 2026/27 application, 30 June 2026 (effective 1 July 2026).
- Solar panel cost per watt, South Africa 2026.
- Lithium battery prices, South Africa 2026.
- Installed system price bands, South Africa 2026.