Professional solar water heating for homes and businesses. We assess your property, roof layout and hot water needs before recommending a system — close-coupled, split, pumped or flat-roof.
Looking for a reliable solar geyser installation in Cape Town? GreaseFlow Solar Water Heating installs solar water heating systems to suit different property layouts, roof structures, hot water requirements and budgets.
Whether you're building a new home, replacing an old geyser or upgrading your existing hot water system, we assess your property and recommend a suitable solution. With over 20 years of industry experience, we focus on quality workmanship, dependable service and systems designed around your needs.
System types
We install the configuration that suits your property — not a single product line. These are the system types available.
Flat-panel collectors absorb sunlight and transfer the collected heat to water in your hot water system. Commonly installed on rooftops and used in different solar water heating configurations.
Best for pitched roofs with good solar exposureGeyser and collector installed together on the roof. Heated water rises naturally from the collector to the storage tank while cooler water moves down to be heated — no pump required when correctly designed.
Common residential choice · requires a strong roofThe storage geyser is separated from the collector. The collector sits on the roof while the geyser is concealed inside the roof space or elsewhere. Circulation may be natural or pumped depending on the layout.
Best for concealed tanks or constrained roof layoutsA circulation pump moves water or heat-transfer fluid between the collector and storage tank. Suited to layouts where the geyser sits lower than the collector, or where controlled circulation is required.
Best for complex layouts and lower tank positionsFlat roofs need careful collector positioning, angle and orientation for effective solar exposure. We assess mounting requirements, wind exposure, waterproofing and access for maintenance.
Best for flat or low-pitched roofs · custom mountingWhere the existing geyser is suitable, its condition, capacity and location can be assessed for a solar retrofit. We inspect the tank and plumbing before confirming whether a retrofit is practical.
Best for keeping a serviceable existing geyserHow it works
A solar geyser uses sunlight to heat water through a collector installed where it receives adequate solar exposure. Here's the flow in a typical system:
The solar collector captures energy from the sun.
Heat moves to water or a heat-transfer fluid in the system.
Heated water is held in an insulated geyser tank until needed.
Hot water flows to taps, showers and other outlets.
An auxiliary electrical element or other backup heat source tops up heating when solar energy is insufficient — depending on the system design.
Solar water heating performance depends on weather, collector positioning, system sizing, hot water usage and the condition of the equipment.
Benefits
Actual savings vary depending on your existing water-heating method, household consumption, weather conditions, tariffs and backup heating usage.
System sizing
Choosing the right system involves more than selecting a tank size. Our assessment considers:
Not sure of the size? Book a sizing assessment and we'll recommend a configuration for your property.
Book a Sizing AssessmentOur process
Six steps. No surprises.
Tell us about your property, hot water requirements and whether you have an existing geyser.
We assess the geyser, roof layout, solar exposure, plumbing arrangement and installation requirements.
We explain the suitable options — close-coupled, split or pumped systems where appropriate.
A quotation outlining proposed equipment, installation work and any additional requirements identified during the assessment.
Our team carries out the agreed installation, including the relevant plumbing and system connections.
The completed system is checked against applicable installation requirements, and you receive guidance on operating and maintaining it.
Common questions
The cost depends on the geyser capacity, collector type, system configuration, roof access, pipework, electrical work and any additional equipment required. Contact us for an assessment and a quotation based on your property.
Possibly. We first need to assess the tank's condition, compatibility, capacity and location. If it is suitable, a retrofit may be considered.
Solar collectors can still receive some solar energy in cloudy conditions, but heating performance may decrease. Depending on your system, an electrical element or another backup heat source may be needed.
Not every system needs a pump. Some thermosyphon systems circulate naturally, while other layouts require a pump. The correct arrangement depends on the system design and the relative positions of the collector and geyser.
Yes, where the roof structure and installation conditions are suitable. The collector's mounting, angle, wind exposure and waterproofing must be assessed.
We recommend periodic preventative maintenance according to the equipment manufacturer's instructions, system design and local water conditions. An inspection can identify wear, corrosion, leaks and components that may need attention.
Request an assessment
Ready to explore solar water heating for your home or business? Let GreaseFlow help you choose a system suited to your property's layout, hot water requirements and budget.