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Quality Gas Geysers, Stoves and Heaters
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Top up your hot water with gas
Easy to install gas geysers
Seamless Solar-to-Gas valve

Enhance your solar setup with reliable gas water heating – or backup your solar geyser with gas

Dewhot offers an easy way to upgrade your solar powered home with reliable hot water – whether you need a standalone gas solution or reliable backup for your solar geyser. Our systems are efficient, affordable, easy to install, and designed to provide reliable hot water – anytime, in any weather, on or off grid.

Which Dewhot geyser is right for my solar system?

Main hot water heater

Every Dewhot gas geyser model is built to run as a full-time, standalone hot water solution — perfect for homes without a solar geyser.

Backup for a solar geyser

Our Fan Forced and Constant Temperature models are designed to integrate seamlessly with most solar geysers using our Solar-to-Gas Valve.

Solar Geyser Compatible Range

Dewhot Fan Forced Solar Geyser Back up Range

Fan Forced Range for Solar Geysers

Fan Forced
Dewhot Constant Temperature Solar Geyser Back up Range

Constant Temp Range for Solar Geysers

Constant Temperature
Solar geyser to gas valve

Solar to Gas Valve for Solar Geysers

Solar to Gas Valve

Why consider backing up your solar geyser with gas?

Many South Africans looking to save on electricity or overcome the power crisis consider solar — and for good reason. A solar geyser is a popular choice, but when there’s not enough sun or too many people in the home, it often can’t keep up. Adding a Dewhot gas geyser with a solar-to-gas valve is quick and easy—and means you’ll never be left without hot water. Say goodbye to cold showers, cloudy days and running out during high demand.

How a solar geyser backup works with gas

Solar + Gas Backup: Use your solar geyser as normal. When the sun isn’t enough, gas automatically kicks in. The Dewhot solar-to-gas valve detects when your solar geyser water isn’t hot enough and seamlessly switches to gas, so you never run out.

New to gas and considering a solar geyser? Discover why gas is the smarter choice!

Gas is a more reliable alternative to a solar geyser as it delivers instant hot water without depending on the sun. With lower upfront costs, quick installation, and proven long-term performance, Dewhot gas geysers give you consistent comfort from day one — at a fraction of the hassle and cost of most solar systems.

 

Reliable hot water anytime, rain or shine

Unlike solar, gas works consistently in all weather and at any time of the day or night.

Plenty of hot water for the whole family

Solar water heaters can’t keep up with high demand — gas won’t run out, no matter how many people use it.

Instant hot water on the spot

No waiting, no wasting water, no wasting energy — gas heats water instantly.

Considerably lower upfront and maintenance costs

Gas systems are typically much cheaper to install and maintain than solar setups.

Speedy installation with less complexity

Installing a gas geyser is quicker and less complex than a full solar system.

Compact, space-saving and easy access

Gas geysers are wall mounted and take up far less space than most solar systems, with no roof panels required with easy access for servicing.

Thinking about an electric geyser? Gas is still the winner for solar-powered homes!

Running an electric geyser on solar can quickly drain your battery and limit your hot water supply — and that constant strain shortens battery life over time. Because electric heating appliances draw a lot of power, you may need extra batteries just to keep your home running, especially on cloudy days. Dewhot’s Constant Temperature Gas Geysers use no electricity, while the Fan Forced models use minimal power (52W) to ignite the flame and run the fan— making both ideal partners for solar-powered homes: efficient, reliable, and fully off-grid ready.

Ready to upgrade your hot water setup?

We’ll help you choose the right system as a back up or a primary source of hot water.

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Why choose Dewhot?

Dewhot gas geysers are built to last and engineered for safety — backed for life by a team with over 20 years of proven performance in the South African market. Enjoy trusted durability, effortless installation, and the confidence of nationwide support.

Explore the Dewhot advantage.

Dewhot Geysers

Hear it from our customers

5 Star Reviews

FAQs: Optimising Home Solar Systems with Gas Water Heating

No — a solar geyser cannot heat water at night. It heats and stores water during the day using sunlight. If the stored hot water is used up or wasn’t heated enough, adding a Dewhot gas backup system gives you the most reliable way to guarantee hot water whenever you need it.

A Dewhot gas backup system works with your solar geyser through a specialised solar-to-gas valve. The valve automatically detects when your solar-heated water isn’t hot enough and triggers the gas geyser to heat water. Dewhot Fan Forced and Constant Temperature gas geysers are fully compatible with solar systems, providing reliable, seamless hot water whenever your solar supply falls short.

No, gas backup systems are highly efficient and only activate when necessary, significantly reducing overall energy costs.

Yes, Dewhot’s gas backup solutions integrate easily with most existing solar geysers by using a specialised solar-to-gas valve. This valve detects when your solar-heated water isn’t hot enough and triggers the gas geyser to ensure seamless hot water supply.

A solar geyser cannot generate new hot water without sunlight — it can only use what was heated and stored during the day. If the stored hot water runs out or wasn’t heated enough, the solar geyser has no way to produce more. Adding a Dewhot gas backup is the smartest solution to ensure you always have reliable hot water, day or night.

No, Dewhot’s systems are designed for low maintenance, offering reliable operation with minimal upkeep.

N0 – Dewhot’s Constant Temperature Gas Geysers, which are compatible with solar systems, operate independently of electricity — making them ideal for load shedding and off-grid use.

Minimal – Fan-forced Dewhot Gas Geysers, which are also compatible, require a small amount of electricity (52W) to ignite and run the fan. They can easily be powered by a backup battery or inverter if needed.

Gas backup systems deliver hot water instantly within seconds, ensuring continuous comfort without delays.

Geyser Buying Guide
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The logic tree is a tool that guides you through a series of questions to help find the gas water heater solution the would be most suitable for your individual home set up.

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