A solar hot water system can provide years of efficient water heating, but that does not mean it can be installed and forgotten about indefinitely.
Roof-mounted solar water heaters remain exposed to direct sunlight, heavy rain, wind, temperature changes and the demanding conditions of South East Queensland weather. Over time, valves, seals, pipework, insulation, electrical components and other parts of the system can deteriorate or move out of adjustment.
RJT Plumbing & Gas recently attended a property after the owners noticed issues with their solar water heater. We inspected the rooftop system, adjusted the solar hot water setup and carried out a service to help restore reliable operation.
While on the roof, we also completed a visual inspection of the accessible hot water components, connections and surrounding installation. This provided an opportunity to identify any visible signs of deterioration that may otherwise have remained unnoticed from ground level.
Why Do Solar Hot Water Systems Need Servicing?
A solar hot water system uses energy from the sun, but it is still a working plumbing and mechanical installation.
The system depends on water flowing through correctly installed pipework, properly operating valves, secure connections, suitable insulation and a reliable storage tank. Many systems also use an electric or gas booster when there is not enough solar energy available to meet the household’s hot water demand.
If one component is not performing correctly, the system may still produce some hot water while operating less efficiently than it should. This can make the problem difficult to identify until the household begins running out of hot water, relying heavily on the booster or noticing a visible leak.
Regular solar hot water maintenance can help identify developing problems before they result in complete system failure or water damage around the roof.
Signs Your Solar Hot Water System May Need Attention
Solar hot water problems do not always begin with a complete loss of hot water. The first signs may be subtle changes in temperature, water pressure or system performance.
It may be time to arrange a solar hot water inspection if you notice:
- Hot water running out sooner than usual
- Water taking longer to reach the expected temperature
- Inconsistent hot water temperatures
- The booster operating more often than normal
- An unexpected increase in electricity or gas usage
- Water leaking or dripping from the rooftop system
- Moisture appearing around the roof or guttering
- Reduced hot water pressure
- Unusual noises from the hot water system
- Visible corrosion around the storage tank or fittings
- Cracked, missing or deteriorated pipe insulation
- A system that performs poorly despite sunny weather
These symptoms can have several possible causes. A professional inspection is needed to determine whether the issue is related to the solar collector, storage tank, valves, pipework, booster, controls or another part of the installation.
What Happens During a Solar Hot Water Service?
The work required during a solar hot water service will depend on the system type, its age, the reported problem and the condition of the installation.
A plumber may inspect the accessible parts of the system for signs of leakage, corrosion, damage or incorrect operation. The system may also need to be tested and adjusted to determine whether it is heating and delivering water correctly.
Depending on the system and the problem being investigated, an inspection may include checking:
- The condition of the rooftop storage tank
- Visible water supply and hot water pipework
- Connections between the tank and solar collector
- Pressure and temperature relief components
- Accessible isolation and control valves
- Signs of corrosion or water leakage
- The condition of external pipe insulation
- System mounting and accessible support points
- Visible roof penetrations around the installation
- Hot water temperature and general performance
- The operation of the electric or gas booster where applicable
Not every solar hot water service involves the same steps, and some components may require specialist testing or additional access. The purpose of the inspection is to identify the likely cause of the problem and determine whether the system needs adjustment, repair, replacement parts or a more substantial upgrade.
Why a Rooftop Inspection Can Reveal More Than a Ground-Level Check
Many solar hot water systems are installed high on the roof, which means homeowners may not see deterioration developing around the tank, valves, pipework or collector.
A small leak may initially evaporate in the sun or flow beneath the unit without being noticeable from the ground. Pipe insulation can deteriorate gradually, fittings can begin to corrode and seals may weaken after years of exposure to heat and weather.
Getting close to the system allows the plumber to inspect the accessible components more thoroughly and look for visible warning signs that cannot be assessed safely from below.
During this recent job, RJT Plumbing & Gas inspected the rooftop solar water heater while servicing and adjusting the system. The surrounding accessible installation was also checked for visible issues while roof access was already in place.
This type of visual check is focused on the plumbing and hot water installation. It is not a substitute for a formal roof inspection by a qualified roofing specialist when structural roof damage, cracked tiles or broader roofing problems are suspected.
Solar Hot Water and Solar Electricity Are Different Systems
Many homes now have both solar electricity panels and a solar hot water system installed on the roof. Although both systems use energy from the sun, they perform different jobs.
Solar electricity panels, also known as photovoltaic or PV panels, convert sunlight into electricity that can be used throughout the home.
A solar hot water system uses solar collectors to heat water that is stored for use in showers, taps and other household fixtures.
Having working solar electricity panels does not confirm that the solar water heater is operating correctly. The solar hot water system has its own tank, pipework, valves, controls and booster components that may require servicing independently.
This distinction can be important when diagnosing a rise in energy costs. A solar hot water fault may cause the electric or gas booster to operate more frequently, even though the home’s solar electricity panels are still generating power normally.
Why Is My Solar Hot Water Booster Running So Often?
A booster provides additional heat when the solar collectors cannot produce enough hot water to meet the household’s needs. This can happen during extended cloudy weather, periods of high water use or colder conditions.
However, a booster that appears to be operating constantly may indicate that the solar part of the system is not contributing as much heat as expected.
Possible reasons may include:
- A problem with the solar collector
- Reduced circulation through the system
- A valve or control issue
- Heat loss through damaged pipe insulation
- A fault affecting the storage tank
- Incorrect system settings
- A problem with the booster controls
- Higher household hot water demand
The booster itself may not be the source of the problem. It may simply be compensating for another part of the solar hot water system that is underperforming.
Can Damaged Pipe Insulation Affect Solar Hot Water Performance?
Insulation around exposed hot water pipework helps reduce heat loss as water moves between the solar collector, storage tank and household plumbing.
Roof-mounted insulation is exposed to intense ultraviolet light, heat, rain and weather. Over time, it may crack, split, shrink or fall away from the pipework.
When hot pipes are left exposed, more heat can be lost before the water reaches the storage tank or household fixtures. Damaged insulation may not cause the system to stop working completely, but it can reduce overall efficiency.
Replacing deteriorated insulation may form part of maintaining a roof-mounted solar water heater, depending on the condition and design of the installation.
What Can Cause a Solar Hot Water System to Leak?
A leak around a solar hot water system can come from several locations, including valves, fittings, pipe connections, the collector or the storage tank itself.
Some valves may release water as part of normal system operation, but frequent or excessive discharge should still be investigated. It may indicate a pressure, temperature or component issue that requires attention.
Leaks should not be ignored simply because they are located outside the home. Water escaping around the rooftop system may contribute to corrosion, water waste or damage to roof materials and surrounding building components.
If water is visibly running from the roof-mounted tank or pipework, arrange an inspection rather than attempting to tighten or adjust unfamiliar components yourself.
Does a Solar Hot Water System Need to Be Adjusted?
Solar hot water systems contain controls and components that affect how water is heated, stored and delivered. If the system has been incorrectly configured, disturbed during other work or affected by component wear, adjustment may be required.
During this recent service, RJT Plumbing & Gas adjusted the solar setup as part of investigating the reported performance issue.
Adjustments should be based on the system design, manufacturer requirements and the results of proper testing. Altering valves, electrical controls or temperature settings without understanding the system can create safety and performance problems.
Repairing Versus Replacing a Solar Hot Water System
Not every solar hot water problem means the entire system needs to be replaced.
Some performance issues may be addressed through servicing, adjustment, replacing a valve, repairing a connection or restoring damaged insulation. In other cases, the age and condition of the storage tank or collector may make replacement the more practical long-term option.
Factors that may influence the decision include:
- The age of the solar hot water system
- The location and severity of any leak
- The condition of the storage tank
- The availability of replacement parts
- The condition of the solar collector
- Previous repair history
- Current household hot water demand
- Booster energy usage
- The cost of repair compared with replacement
A professional assessment can help determine whether repairing the existing unit is worthwhile or whether the household would benefit from replacing it with a newer solar, heat pump, electric or gas hot water system.
How Often Should Solar Hot Water Systems Be Checked?
The recommended maintenance schedule depends on the manufacturer, system design, water quality, installation conditions and age of the unit.
Homeowners should refer to the manufacturer’s servicing recommendations and arrange an inspection whenever there is a noticeable change in performance.
Even when the system is still producing hot water, visible leaks, corrosion, damaged insulation or increased booster use may indicate that servicing is needed.
Waiting until the household has no hot water at all can limit the available repair options and create unnecessary disruption.
Can Solar Hot Water Systems Be Serviced During Other Roof Work?
If roofing, solar electricity, antenna or exterior maintenance work is being planned, it may be worth considering the condition of the solar hot water system at the same time.
Different trades perform different work, but planning inspections together can help identify access requirements and avoid unnecessary disruption.
Any plumber or contractor working near the solar hot water system should take care not to damage the pipework, collector, tank, insulation or connected components.
If the hot water system is moved, disconnected or affected by roofing work, it should be checked before being returned to normal operation.
Solar Hot Water Repairs and Servicing Across Moreton Bay
RJT Plumbing & Gas provides hot water system inspections, servicing and repairs throughout North Lakes and surrounding Moreton Bay suburbs.
Our hot water plumbing services include:
- Solar hot water system inspections
- Solar hot water servicing and adjustments
- Roof-mounted hot water system assessments
- Solar hot water fault investigations
- Hot water leak detection
- Valve and pipework repairs
- Hot water pressure investigations
- Booster performance checks
- Hot water system replacement advice
- Electric, gas, solar and heat pump hot water services
We service North Lakes, Mango Hill, Griffin, Murrumba Downs, Kallangur, Narangba and surrounding Moreton Bay areas.
Is Your Solar Hot Water System Underperforming?
A roof-mounted solar water heater can continue producing some hot water even when a valve, connection, control or other component is no longer performing correctly.
If your hot water is inconsistent, the booster is running more frequently, water is leaking from the roof or the system has not been inspected for some time, arranging a service can help identify the cause.
RJT Plumbing & Gas can inspect the accessible system components, investigate performance issues, carry out suitable adjustments and explain whether further repairs or replacement should be considered.
Contact RJT Plumbing & Gas to arrange a solar hot water system service or rooftop hot water inspection across North Lakes and the surrounding Moreton Bay area.
Frequently Asked Questions
Why does a solar hot water system need servicing?
A solar hot water system still relies on valves, pipework, seals, insulation, controls and a storage tank. These components can deteriorate, leak or move out of adjustment after years of exposure to sunlight, rain, wind and changing temperatures.
What are the signs that a solar hot water system needs attention?
Common warning signs include inconsistent water temperatures, hot water running out sooner than usual, increased booster use, reduced hot water pressure, rooftop leaks, unusual noises, visible corrosion and damaged pipe insulation.
Why is my solar hot water booster running more often?
A booster may run more frequently during cloudy weather or periods of high hot water use. Persistent booster use can also indicate that the solar collector, circulation, controls, valves, insulation or storage system is not performing as expected.
What is checked during a solar hot water service?
The work depends on the system and reported problem. A plumber may inspect accessible valves, pipework, fittings, insulation, storage tank components, connections, signs of corrosion or leakage, system controls, water temperature and booster performance.
Can damaged pipe insulation affect solar hot water performance?
Yes. Damaged or missing insulation around exposed hot water pipes can allow heat to escape as water moves between the solar collector, storage tank and household plumbing. This may reduce the efficiency of the system.
Why is water leaking from my rooftop solar hot water system?
Water may escape from a valve, fitting, pipe connection, solar collector or storage tank. Some valve discharge can occur during normal operation, but frequent, excessive or unexplained leaking should be inspected by a licensed plumber.
Are solar electricity panels and solar hot water systems the same?
No. Solar electricity panels generate electricity, while a solar hot water system captures solar energy to heat water. Each system has separate components and may require different inspections, servicing and repairs.
Can a solar hot water system be repaired instead of replaced?
Some problems can be resolved through servicing, adjustment, valve replacement, pipe repairs or new insulation. Replacement may be more practical when the storage tank or collector is badly deteriorated, parts are unavailable or the system is nearing the end of its service life.
Who services solar hot water systems across Moreton Bay?
RJT Plumbing & Gas provides solar hot water inspections, servicing, adjustments, fault investigations and hot water system repairs across North Lakes and surrounding Moreton Bay suburbs.
