At R42/kg for LPG (typical 2026 retail) and 49 MJ/kg, gas works out to roughly R3.09 per kWh of heat delivered to your pot or geyser.
Grid electricity averages R3.10/kWh on Homepower 4 in 2026 — but only about 70% of that energy makes it into the pot on an electric stove, pushing effective cost to ~R4.40/kWh.
For high-heat cooking (wok, boiling large pots) gas wins clearly. For low-and-slow (rice cooker, kettle) electric is comparable or cheaper because appliance efficiency is higher.
Bottom line: gas is a strong hedge against load shedding and tariff hikes, especially for households that cook daily or use an instant gas geyser instead of an electric one.