Heating water is about 40% of what you pay Eskom every month — and the cheapest thing in your house to fix. Solar geysers and heat pumps, fitted, wired and certified.
Compare geysers & heat pumps
A roof-mounted collector and 150–200L tank that heats water straight from the sun. Retrofit or new Thermosiphon.
Smart controller that diverts excess solar power to heat your existing geyser element. No new tank, no plumbing.
Pulls heat from the air using a third of the electricity of an element. Works rain or shine, day or night.
| Solar geyser | Geyser optimiser | Heat pump | |
|---|---|---|---|
| Upfront cost | R22.5k – R30.7k | — | R27.3k – R31.9k |
| Running cost | Lowest — free sun | Low — solar surplus only | Low — ⅓ of an element |
| Works at night | From stored hot water | From stored hot water | Yes, anytime |
| Cloudy-day output | Reduced | Reduced | Unaffected |
| Roof space needed | North-facing panel | None | None — ground or wall |
| Best for | Sunny homes, long stay | Homes with solar installed | Tight roofs, flats, retrofits |
| Maintenance | Once annually | None | Once annually |
What you'll actually pay for a 150L solar geyser, installed.
Types, brands, costs — everything for a gas geyser purchase.
Side-by-side: which cuts your bill more and in what conditions.
Breakdowns for Thermosiphon and flat-plate systems.
Retrofit your existing geyser with a solar diverter — no new tank.
Which brands install in South Africa and how they compare.
