Solar Water Heating Systems

Kwikot solar water geyser

Affordable and Dependable!

Kwikot is a manufacturer and supplier of solar geysers and offer an extensive range of solar water heating systems for domestic household application.

System types are available as direct and indirect variants. This means that there is a solar system for all climatic conditions, notable frost-prone and frost-free areas.

Solar water heating systems is not only about saving the environment and going green, but also about the savings made on the household electricity bill. On average, 40% of a household’s electricity usage is just to heat water. So just imagine how much can be saved by installing to an efficient solar systems.

Kwikot's high pressure solar water heating systems are manufactured to comply with SANS 1307, are SANS 400kPa approved, and come with the option of close coupled (thermosyphon circulation) and split (pumped circulation) systems.

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How a Solar Geyser Works

Household water (direct system) or an anti-freeze agent (indirect system) is circulated through “collectors” installed on the roof. The collectors (vacuum tube manifold or flat plate) use the sun’s energy to heat the water or the anti-freeze agent.

Indirect Solar Water Heating System

If an anti-freeze agent is circulated through the collectors it is called an indirect system because the water in the geyser is not heated directly by the sun but by the heated anti-freeze agent which is passed into a lining in the solar water geyser to heat the water.

Direct Solar Water Heating System

If the geyser water is circulated through the collectors it is called a direct system because the water in the geyser is heated directly by the sun in the collector panel and is transferred into the solar water geyser.

Closely Coupled Water Heating System

The tank is mounted outside the roof together with the collector panels or evacuator tubes. The water in a closely coupled system is heated by the solar collector and circulated into the tank using a principle called thermosyphon.

Thermosyphon

A water circulation method which makes use of the fact that hot water rises and cold water sinks. The geyser must be installed higher than the solar collector. The solar collectors and geyser needs to be close to one another for the process to work efficiently.

Split System

The tank is installed inside the roof and collector panels or evacuator tubes are mounted outside the roof. Split solar water heating systems either use thermosyphon or a pump to circulate the water within the solar water heating system.

Pumped System

A water circulation method either driven by a solar controller or by a solar voltaic panel with a battery back-up. Pumps used in solar water heating systems are very quiet and draw very little electricity (less than 150 Watts).

Solar Water Tank

A solar water tank (geyser) is designed to keep the water hot and is manufactured for longevity.

Solar Collector

The water tank (geyser) is connected to the collector. The collecter could be panels or glass tubes.

Solar Geyser Anode

Solar water tanks come equipped with an anode which protects the tank from corrosion. Impurities stick to the anode and the anode corrodes instead of the tank metal. The anode is replaceable.

Electricity and Solar Water Geysers

Electricity is still partnered with solar heating. You will always have hot water, even on cloudy or winter days. The geyser thermostat will ensure that the water is retained at the required temperature.

Thermosyphon or Split?

Thermosyphon

  • Tank visible on roof .
  • Less aesthetic.
  • Less maintenance.

Choose this option if you don't mind the tank on the roof; you don't want damage in the event of a burst tank; you want minimal maintenance of the system.

Split System

  • No tank visible.
  • More aesthetic.
  • More moving parts.
  • More maintenance.

Choose this option if you don't want the tank to be viewed on the roof; or the rules of the housing estate / complex don't allow for tanks on the roof; or the roof structure cannot handle the weight of the tank.

Geyserwise Controller

Consider using an intelligent controller for the management of your solar system to your best advantage from both an energy and economical point of view. Click here for more information.

What is the Q-Factor?

Each solar water heating system tested by the SABS receives a system rating (Q-factor), which indicates the kilowatt-hours (kWh) of electricity it is expected to save on a typical day (as determined by the SABS test). Click here for a list of the Q-factors.

What is a retrofit?

A retrofit is where an existing high pressure electric water heater is converted into a solar water heating system by attaching evacuated tubes or a solar panel.

A quick comparison

Model Panels Evacuator Tubes
Collector Toughened prismatic, non-reflective anti-hail tempered glass. Semi-selective black crome surface on copper substrate offers maximum absorbtion efficiency. Evacuator Tubes manufactured from borosilicate glass. The tube consists of a transparent outer tube, allowing light rays to pass through, and a coated inner tube for radiation absorbtion.
Tank Inner cylinder manufactured from 2mm steel and thermo fused porcelain enamelled for longevity and hygiene. Polyurethane insulation between the heat exchanger and outer casement reduces heat loss. Inner cylinder manufactured from 2mm steel and thermo fused porcelain enamelled for longevity and hygiene. Polyurethane insulation between the heat exchanger and outer casement reduces heat loss.
Coupling Closely coupled or split system. Closely coupled or split system.
System Indirect system. Direct or indirect system
Water Circulation Thermosyhon. Thermosyphon or pumped.
Moving Parts No moving parts. No moving parts if thermosyphon. Pumped systems use either a 12V circulating pump powered by photovoltaic collector panel, or 220V circulating pump. Geyserwise controller required for circulating pump.
Anti-Freeze Replace every 3 years. Proylene gel. Indirect systems: replace every 3 years. Proylene gel.