The best solar geysers and gas water heaters for load-shedding proof hot water

The pitch in the listing is the whole reason PV conversions have taken over: any existing geyser can be converted, no additional plumbing, no pump to circulate water, no panels on the roof to crack in frost. Sun hits the PV panels, a DC element heats the tank, and the AC element stays as backup. Fewer moving parts than a pumped thermal system, and nothing hot travelling across your roof.

It sits mid-range in this field. Full pumped flat plate and split systems here run to roughly double, and the 200L Tecron cylinder on its own costs more than this complete conversion. For 200L, which the thermal kits here peg at a household of about four, that is a fair price.

The maker claims up to 40 percent off electricity usage. Treat that as the best case rather than the number you will see. There is also temperature control for hot summer days, which the listing flags as a way to manage overheating.

The catch. No shopper ratings yet, and the listing does not spell out panel count or element rating the way the off-grid version does. Ask the seller for the component list before you commit.

This is the clearest listing in the Geyserwise range. Two 590W panels, a 1.5kW AC and 1100W DC element, the ECO MPPT controller, connector cable, Anderson clip and the MC4 leads. You can price-check the parts and see what you are getting, which is more than most of this shelf offers.

It costs a bit less than the top pick and works on the same principle, so it is the obvious fallback if the 200L high irradiation system is out of stock. The off-grid framing suits a property with no reliable grid feed to fall back on.

The catch. The listing names no cylinder capacity, so this is the kit rather than the tank. You need a suitable geyser already in place.

Battery ignition means no electricity needed, so it runs through load-shedding without a thought. Twelve litres a minute is enough for a shower and a kitchen tap in a small place, and the listing says it holds a constant temperature and works at low water pressure, which matters on weak municipal supply.

Against the DewHot below it does much the same job for roughly 40 percent less. Unless you specifically want the copper radiator and multiple-outlet claims of the DewHot, this is the better buy on price alone.

The catch. No shopper ratings, and gas means an ongoing bottle cost plus a proper installation by a qualified installer. Budget for both.

The listing makes a specific promise the Totai does not: the unit adjusts to flow to hold a constant temperature across multiple outlets at the same time. If your shower goes cold every time someone opens the kitchen tap, that is the feature you are paying for. Copper radiator and off-grid battery ignition round it out.

It is the only product here with a shopper rating, a five out of five, though from a single rating. Thin evidence, but better than none.

The catch. Costs meaningfully more than the Totai for the same 12L flow rate, and one rating tells you very little.

This is the top of the pumped range and priced accordingly, well over double the top pick. What you get is everything in one box: a 200L indirect solar geyser, a 20 tube collector, the Geyserwise Max 12V pump kit, solar probe, valve pack and air release valve.

Indirect is the point. The Kwikot indirect listing on this shelf explains why: heat transfers via propylene glycol, which is the setup for frost and locations below five degrees. If you are on the Highveld or in the Karoo, a direct system is the wrong tool. Evacuated tubes also tend to suit cold, clear winter conditions.

The catch. The most expensive route here, and a pumped split system means a controller, a pump and a plumber. More to install and more to go wrong than a PV conversion.

Start with what you already own. If there is a sound geyser in the roof, a PV conversion is almost always the cheaper and less disruptive upgrade, because nothing new gets plumbed onto the roof. If the tank is old or you are building, a complete kit with the cylinder included makes more sense than buying a conversion and discovering the geyser is not up to it.

Size by household, not by ambition. The kit listings here are blunt about it: 100L suits two people or fewer, 150L up to three, 200L up to four, 300L up to six. A bigger tank you never empty just loses heat overnight.

Frost decides direct versus indirect. Direct systems circulate your drinking water through the collectors and are for areas with little to no frost. Indirect systems use glycol and are for cold places. Getting this wrong is an expensive mistake, so check your winter minimums before you check the price.

Look for the compliance line. SANS 1307, SABS approval and the kPa pressure rating should be stated, and the pressure must match your supply. On gas, check the flow rate in litres a minute against how many taps you run at once, and remember that indoor units have their own requirements. Factor installation into the total either way, because none of this is a weekend job.