Solar borehole pump maintenance and preventive servicing
Introduction to solar borehole pump maintenance
A solar borehole water pumping system is an important investment for homes, farms, institutions, commercial properties, livestock projects, and residential developments. It uses solar panels to generate electricity, a compatible pump controller to manage power delivery, and a borehole pump to lift water from underground to a storage tank or distribution point. When properly designed and maintained, the system can provide a dependable water supply while reducing reliance on grid electricity and fuel-powered generators.
However, installing solar panels and a borehole pump is only the beginning. The entire water supply system requires periodic inspection, cleaning, performance monitoring, and preventive servicing. Dust on solar panels, damaged electrical cables, loose connections, blocked filters, leaking pipes, failing float switches, and changes in borehole water levels can affect system performance.
Pro-Logic Technologies Limited provides technical support for electrical and water pumping requirements, including assessment of solar-powered pumping systems, fault identification, component inspection, and maintenance planning. For borehole-related enquiries and water pumping requirements, the company also works with Hydrosol Drilling Solution.
The purpose of solar borehole pump maintenance is to identify developing problems before they cause expensive failures, maintain safe operation, preserve water delivery performance, and help the equipment operate within its intended specifications.
Why solar borehole pump maintenance is important
A solar borehole system contains several interconnected components. A fault in one component can affect the operation of the entire installation. For example, dirty solar panels may reduce available power, while an incorrectly configured controller may prevent the pump from starting even when the panels are receiving adequate sunlight.
Similarly, a pump may be electrically functional but deliver insufficient water because the borehole water level has fallen, the pipework is leaking, or the pump is operating outside its recommended duty conditions.
Preventive maintenance helps property owners and system operators identify these problems systematically.
1. Maintaining consistent water supply
Homes, farms, schools, rental properties, and commercial premises may depend on borehole water for daily activities. A pumping failure can interrupt cooking, cleaning, irrigation, livestock watering, sanitation, and other essential operations.
Routine inspections help identify declining water output, unusual controller behaviour, and developing mechanical problems before a complete breakdown occurs.
2. Protecting the pump and controller
A borehole pump must operate within its manufacturer's electrical, hydraulic, temperature, and installation limits. Running a pump without adequate water, repeatedly starting and stopping it, or supplying it with incompatible electrical power can damage equipment.
Maintenance provides an opportunity to verify controller settings, inspect protective devices, check water-level protection, and investigate unusual operating conditions.
3. Reducing avoidable repair costs
Small faults can develop into more serious failures if they remain undetected. A loose connection, for example, may create resistance and heat. A leaking pipe can waste pumped water, while a malfunctioning level sensor may allow the pump to operate under unsuitable conditions.
Preventive servicing helps identify these faults while repairs may still be relatively straightforward.
4. Improving energy utilisation
Solar pumping performance depends on sunlight, panel condition, array configuration, controller operation, pump selection, and hydraulic requirements. Dust, shading, damaged cables, and poor electrical connections may reduce the power available to the pump.
Cleaning and inspecting the system helps maintain the performance that the installed equipment is capable of delivering. Maintenance cannot compensate for an incorrectly sized system, an inadequate borehole yield, or insufficient solar capacity, but it can help identify those limitations.
5. Extending useful equipment life
Solar panels, pump controllers, submersible pumps, cables, storage tanks, valves, and pipework all have different service requirements. Following the manufacturers' instructions and addressing abnormal conditions promptly can reduce unnecessary stress on equipment.
The objective is not to promise a particular service life. It is to maintain suitable operating conditions and identify faults before they cause avoidable damage.
Main components that require maintenance
A complete solar borehole pumping system should be inspected as one integrated installation.
Solar panels
The solar array supplies electrical power to the pump controller. Maintenance includes checking for dust accumulation, bird droppings, leaves, shading, cracked glass, damaged frames, loose mounting hardware, and signs of water ingress into electrical enclosures.
Panels should be cleaned using a method recommended by the manufacturer. Cleaning should not involve walking on modules, scraping the glass with unsuitable tools, or applying chemicals that could damage the surface.
Solar mounting structure
The supporting structure should be checked for corrosion, loose fasteners, movement, damaged brackets, and signs of wind-related stress. Panels should remain securely mounted and positioned to minimise avoidable shading.
Structural repairs must account for roof safety, ground conditions, wind exposure, and the mounting system's design.
Pump controller
The controller regulates power supplied to the pump and may provide functions such as overload protection, dry-run protection, under-voltage protection, monitoring, and fault indication.
During servicing, the technician should inspect the enclosure, ventilation, seals, cable entries, status indicators, fault history, protective devices, and manufacturer-approved settings. Fault codes should be recorded before resetting the controller.
Repeatedly resetting a controller without investigating the underlying fault can hide important diagnostic evidence and may expose the pump to further damage.
Submersible borehole pump
The pump lifts water through the delivery pipe. Because the unit is installed below ground or underwater, many faults must be diagnosed through electrical measurements, hydraulic testing, controller information, and inspection of the accessible installation.
Maintenance should confirm whether the pump starts normally, delivers the expected flow under comparable conditions, and operates without repeated trips or unusual vibration transmitted through the pipework.
A pump should not be removed from the borehole merely because output has declined. First investigate power availability, controller behaviour, borehole water levels, discharge pressure, pipework, and other possible causes.
Electrical cables and protection
Pump cables, solar DC cables, connectors, isolators, protective earth conductors, and other electrical components require appropriate inspection.
Look for damaged insulation, exposed conductors, corrosion, overheating, loose terminations, moisture entry, and signs of animal damage. Protective devices should be checked by a qualified technician in accordance with the system design and applicable electrical requirements.
Borehole headworks and water delivery pipes
The borehole headworks protect the borehole opening and associated equipment. The installation should be checked for damaged covers, insecure fittings, signs of leakage, and possible routes for contamination.
Accessible delivery pipes, joints, valves, pressure gauges, and fittings should be examined for leaks, corrosion, blockage, or physical damage.
Storage tanks and water-level controls
Water storage equipment requires attention to tank condition, inlet and outlet fittings, overflow arrangements, supports, valves, and level-control equipment. Float switches and electronic sensors should be checked to confirm that they correctly control filling and prevent overflow or unsuitable pump operation.
Solar borehole pump maintenance schedule
The appropriate maintenance frequency depends on the equipment, site conditions, water quality, operating hours, dust exposure, weather, and manufacturer's recommendations. The following schedule is a practical starting point, not a replacement for the specific service requirements of the installed equipment.
Daily or routine operator observations
The person responsible for the water supply should observe the system during normal operation. Record unusual changes in pumping time, water delivery, controller indications, tank filling, and noise.
Where a monitoring system is installed, review the available operating information and note unexpected changes. Do not open electrical enclosures or handle exposed wiring as part of routine observations.
Weekly visual inspection
Inspect accessible solar panels for heavy dust, leaves, bird droppings, new shading, or visible damage. Check the surrounding area for vegetation growth, construction materials, or objects obstructing sunlight.
Observe the pump controller's normal status indicators and check accessible pipework for leaks. Confirm that the tank inlet and overflow are functioning as intended.
The weekly frequency can be increased at dusty sites or where nearby construction, farming activities, or seasonal conditions cause rapid panel contamination.
Monthly performance review
Compare water delivery, pump operating time, tank-filling behaviour, and available controller data with previous records. Where suitable instruments are available, record the operating voltage, current, power, and flow rate under comparable conditions.
Check for changes that may indicate dirty panels, partial shading, electrical losses, changing water levels, leaks, or a developing pump fault.
Review any recurring fault codes and confirm that protective functions have not been bypassed.
Periodic technical inspection
Arrange technical inspections at a frequency suitable for the equipment and operating environment. The inspection may include electrical testing, checking cable terminations, reviewing controller configuration, testing level controls, inspecting protective devices, and assessing the hydraulic performance of the system.
The technician should follow the relevant manufacturer's procedures and isolate equipment safely before conducting work that exposes electrical parts.
Annual or manufacturer-specified servicing
A comprehensive service should review the entire system, including solar modules, mounting hardware, electrical connections, controller operation, pump performance, water storage, level controls, pipework, and documented fault history.
Some sites require more frequent servicing because of high operating demand, corrosive conditions, poor water quality, or previous faults. The actual interval should be based on risk, manufacturer guidance, and observed system condition rather than an arbitrary calendar date.
Solar panel cleaning and inspection
Solar panel condition directly affects the power available to the pumping system. The amount of power lost to contamination varies with the type and thickness of the material, panel orientation, rainfall, and site conditions.
How to inspect solar panels
Look for dust, mud splashes, bird droppings, leaves, cracked glass, damaged frames, and visible cable or connector problems. Also check for new sources of shading, such as trees, vegetation, new buildings, antennas, or stored materials.
If water delivery has declined, do not assume dirty panels are the only cause. Compare the electrical readings and operating conditions with previous records, and investigate other potential causes.
Safe solar panel cleaning
Where cleaning is required, use a safe access method and follow the manufacturer's instructions. Work should be carried out by people who understand the electrical and fall hazards associated with the installation.
Use suitable cleaning materials that will not scratch the glass or damage module surfaces. Avoid aggressive chemicals, abrasive brushes, high-pressure water directed at electrical enclosures, and cleaning methods that create thermal shock.
Do not climb onto solar panels. Rooftop work requires appropriate fall protection and access arrangements.
Checking for shading
Even partial shading can reduce the output of a solar array, depending on the module arrangement and electrical configuration. Inspect the site at different times of day when necessary, because shadows may move across the panels.
If shading is caused by vegetation, remove or manage it without damaging the array, cables, or nearby property. Any changes to the mounting position or array wiring should be assessed by a qualified solar technician.
Pump controller maintenance and fault prevention
The pump controller is central to the operation of a solar borehole pumping system. It receives power from the solar array and operates the pump according to its design and settings.
Record fault codes before resetting
If the controller displays an error, photograph or record the exact code and any associated indicators. Check the manufacturer's documentation to identify the possible causes.
Depending on the controller model, a fault may relate to input voltage, overcurrent, motor overload, dry running, overheating, sensor failure, or communication problems. The meaning of a code must be verified against the correct model documentation.
Check ventilation and environmental protection
Controller enclosures should remain within the environmental and temperature limits specified by the manufacturer. Check for blocked ventilation, excessive dust, corrosion, moisture, damaged seals, and direct exposure to weather where the enclosure is not rated for those conditions.
Do not open a controller while it is energised unless a specific manufacturer-approved diagnostic procedure requires it and the technician is qualified to perform that work.
Verify protection and settings
The technician should confirm that the controller settings match the installed pump and motor specifications. Depending on the equipment, these may include motor current limits, speed settings, dry-run protection, sensor configuration, restart delays, and other operational parameters.
Do not increase current limits or disable protection simply to force a pump to run. Incorrect settings can damage the motor, controller, or associated equipment.
Inspecting pump cables and electrical connections
Electrical problems can reduce pumping performance, cause intermittent operation, or create dangerous conditions. Maintenance should therefore include appropriate inspection and testing of the electrical installation.
Cable condition
Inspect accessible cables for abrasion, cuts, exposed conductors, heat damage, crushed sections, and damage caused by rodents or other animals. Confirm that cables are properly supported and protected from sharp edges, excessive tension, water ingress, and mechanical damage.
A submersible pump cable must be suitable for the application and installed according to the pump manufacturer's requirements.
Connectors and terminations
Loose or corroded connections can produce excessive resistance, heat, voltage drop, and intermittent faults. A qualified technician should check connections using suitable procedures and instruments.
Do not tighten electrical terminals while circuits are energised. Electrical isolation and verification that the relevant conductors are safe to work on are essential before opening enclosures or handling connections.
Earthing and protective devices
Inspect the earthing arrangement and protective devices according to the installation design and applicable electrical requirements. Verify that any required residual-current, overcurrent, surge-protection, and isolation arrangements are suitable for the system.
Protection requirements depend on the system architecture, equipment instructions, local regulations, and site conditions. They should not be guessed from the appearance of the installation.
Monitoring borehole water levels and yield
One of the most important aspects of solar borehole pump maintenance is distinguishing an equipment fault from a water-supply limitation.
A borehole has a particular yield under specific conditions. If the pump withdraws water faster than the borehole can replenish it, the water level may fall during pumping. This can cause the pump to lose output or trigger dry-run protection.
Static and pumping water levels
The static water level is measured when the borehole has recovered and is not being pumped. The pumping water level is measured while water is being withdrawn under defined operating conditions.
The difference between these levels is known as drawdown. Recording water levels and flow rates over time can help identify changes in borehole performance.
Measurements should be conducted by people equipped to do so safely, using suitable procedures that protect the borehole and electrical installation.
Signs of possible low borehole yield
Possible warning signs include a declining flow rate during pumping, longer recovery periods, frequent dry-run alarms, interruptions in supply during extended pumping, or a noticeable change in the water level.
These symptoms do not prove that the borehole is failing. They require investigation to distinguish reduced recharge, seasonal groundwater changes, pump problems, restrictions in pipework, and other causes.
Adjusting pumping demand
If the borehole cannot sustainably supply the required peak demand, changing the solar panel arrangement alone will not solve the underlying water limitation.
Possible responses include adjusting the pumping schedule, selecting a suitable flow rate, adding adequate storage, improving demand management, and arranging a professional borehole assessment.
A system should be operated within the sustainable yield established for the borehole. Pumping more water than the borehole can provide may cause operational problems and could affect the borehole's long-term performance.
Checking flow rate, pressure, and water delivery
A reduction in water output is one of the clearest reasons to inspect a solar pumping system. However, output should be assessed under comparable conditions before conclusions are drawn.
Measure flow rate consistently
Flow rate describes the volume of water delivered per unit of time. It may be measured in litres per minute or cubic metres per hour using an appropriate method or instrument.
Record the time, sunlight conditions, pump settings, discharge arrangement, and relevant water-level readings. This makes comparisons more useful than relying on a general impression that the tank is filling slowly.
Check pressure and pipework restrictions
Where the installation includes a pressure gauge, compare readings with the normal operating range. Inspect accessible valves and filters for restrictions and look for leaking joints or damaged pipework.
A closed valve, blocked filter, crushed pipe, or leaking connection may reduce delivery even when the pump is functioning correctly.
Account for changing sunlight
Solar pumping output often varies throughout the day. Morning, afternoon, cloudy-weather, and peak-sun readings are not directly interchangeable unless the system's control strategy and conditions are taken into account.
A meaningful performance assessment should distinguish normal solar variation from an actual fault.
Storage tank, float switch, and level sensor maintenance
Storage tanks help balance water production with demand. The tank should be inspected for structural damage, leaks, insecure supports, faulty valves, blocked outlets, and unsuitable overflow arrangements.
Tank filling controls
A float switch or level sensor may stop the pump when the tank is full or request pumping when the water level falls. If the sensor becomes stuck, its cable is damaged, or its settings are incorrect, the pump may stop too early, fail to start, or continue pumping after the tank is full.
Inspect accessible sensor components and test their operation using the equipment manufacturer's procedure.
Preventing tank overflow
Overflow protection should be treated as an important part of system maintenance. Check that the inlet control stops filling as intended and that the overflow route is unobstructed.
Where the system includes automatic controls, verify that the pump stops correctly when the high-level signal is received. Do not bypass the level control to maintain water supply without a safe, engineered alternative.
Tank hygiene
Storage tanks should be maintained in a way that protects water quality. Keep covers secure, protect openings from insects and debris, and arrange appropriate inspection and cleaning according to the intended water use and applicable public-health guidance.
Water intended for drinking requires suitable water-quality assessment and treatment where necessary. A borehole source should not automatically be assumed to be potable.
Pipework, valves, and leak prevention
Leaks waste water and can reduce the amount reaching the intended delivery point. Depending on the system, leaks may occur at pipe joints, threaded fittings, valves, tank connections, and exposed sections of the delivery line.
Inspect accessible sections for wet patches, corrosion, cracks, loose supports, and signs of erosion around buried pipes. Investigate unexpected changes in tank-filling time or pressure, particularly if pump operation appears normal.
Valves should operate correctly and remain accessible for maintenance. Where a non-return valve is installed, check for symptoms such as water flowing backwards after shutdown or unusual pressure changes. These symptoms require assessment rather than automatic replacement of the valve.
Do not excavate buried pipework without first checking for underground electrical services, other utilities, and site hazards.
Common solar borehole pump problems and maintenance responses
The pump does not start
Possible causes include insufficient solar input, a controller fault, an electrical supply problem, an open protective device, incorrect settings, a failed sensor, or a motor fault.
Begin with the visible status indicators and recorded fault history. Check whether sunlight and controller input conditions are within the manufacturer's specified operating range. Electrical testing should be performed by a qualified technician.
The pump starts but delivers little water
Potential causes include low borehole water level, a restricted pipe, a leaking connection, an unsuitable pump operating point, a damaged pump, or inadequate power under the current solar conditions.
Measure flow rate where possible, review the controller information, inspect accessible pipework, and assess the borehole water level. Avoid replacing the pump before establishing the likely cause.
The pump stops repeatedly
Intermittent operation may be caused by changing solar input, dry-run protection, overheating, electrical faults, a tank-level signal, or an incorrectly configured controller.
Record the exact circumstances under which the pump stops, including time of day, tank level, weather conditions, and fault code. This information helps the technician reproduce and diagnose the problem.
The storage tank does not fill
The cause may be reduced pump output, a faulty float switch, a blocked pipe, a closed valve, a leak, or unusually high water consumption.
Check the tank-level control, inspect the delivery route, and compare actual flow with previous records. If the pump operates for longer than normal without filling the tank, investigate the hydraulic system and borehole performance.
The controller displays a fault
Record the displayed code and compare it with the correct controller manual. Identify whether the fault concerns electrical input, motor operation, temperature, water availability, or another monitored condition.
Do not repeatedly reset the unit or change multiple settings at once. A structured diagnostic approach reduces the risk of masking the fault or causing additional damage.
Preventive maintenance for agricultural solar borehole systems
Farms often operate pumps under changing water demand. Irrigation may require higher flow rates during certain periods, while livestock systems may need dependable water delivery throughout the day.
Maintenance should account for the demands of the farm and the capacity of the borehole.
Irrigation requirements
Inspect filters, valves, irrigation pipes, distribution manifolds, and any dosing or control equipment associated with the system. Blocked filters or damaged lines can change flow and pressure, causing uneven water distribution.
Where irrigation demand is high, use storage and pumping schedules to manage demand without exceeding the borehole's sustainable yield.
Livestock water supply
Check drinking troughs, float valves, storage tanks, and supply pipes for leaks, blockages, contamination, and mechanical damage. A pump can operate normally while water is lost or restricted further downstream.
Record whether troughs refill at the expected rate and whether livestock demand has changed. Increased demand may require a review of storage and distribution capacity rather than an immediate pump replacement.
Remote agricultural installations
Sites far from the property owner's residence may need a designated operator, remote monitoring, or a documented inspection routine. Remote alerts can help identify a fault, but they do not eliminate the need for physical inspections and safe maintenance.
Preventive maintenance for homes, estates, and institutions
Residential and institutional water systems may supply kitchens, bathrooms, cleaning points, laundry facilities, and other users. Their maintenance requirements depend on the number of users, water demand, storage capacity, and operating schedule.
Check that the tank fills properly, distribution pipes remain sound, and level controls operate reliably. Where a booster pump is used to distribute water from the storage tank, maintain it separately according to its own manufacturer's instructions.
For multi-unit estates, record recurring supply interruptions and investigate whether they arise from borehole limitations, inadequate storage, leaking distribution pipes, pump faults, or demand peaks.
Schools, clinics, commercial premises, and other institutions should have a clear process for reporting water interruptions and arranging authorised technical support.
Maintenance records and performance history
A maintenance record helps the owner understand the system's normal behaviour and identify gradual changes.
Useful information includes:
- Date and type of inspection.
- Solar panel condition and cleaning performed.
- Controller status and recorded fault codes.
- Pump operating hours, where available.
- Measured flow rate and discharge pressure, where applicable.
- Static and pumping water levels, when measured.
- Tank-filling time and level-control operation.
- Electrical test results recorded by the technician.
- Repairs, replaced components, and configuration changes.
- Outstanding faults and recommended follow-up work.
Measurements should include units and operating conditions. For example, a flow-rate reading without the time of day, pump settings, or relevant water-level information may be difficult to compare with later readings.
Keep equipment manuals, wiring diagrams, pump specifications, controller settings, and installation records in a location accessible to authorised maintenance personnel.
Safety precautions during solar borehole pump maintenance
Solar pumping installations combine electrical energy, elevated structures, water, and mechanical equipment. Maintenance must be performed with appropriate safety controls.
Electrical safety
Solar panels may generate voltage whenever sufficient light reaches them. Switching off a controller does not necessarily remove voltage from all upstream DC conductors.
Before electrical work, follow the system's isolation procedure, account for all power sources, and verify that the relevant conductors are safe using appropriate instruments. Some tests require specialised procedures because the solar array remains capable of generating electricity.
Only appropriately qualified personnel should undertake electrical repairs, live testing, controller work, or modifications to protective devices.
Working at height
Where panels are mounted on a roof or raised structure, use suitable access equipment and fall protection. Avoid working on wet, slippery, or unstable surfaces and do not stand or walk on solar modules.
Pump removal and borehole access
Removing a submersible pump can involve heavy equipment, suspended loads, electrical cables, and borehole headworks. The work should be planned using appropriate lifting equipment and procedures.
Do not lean over an unsecured borehole opening or lower unapproved tools or materials into the borehole. Maintain protection against contamination during servicing.
Water quality and hygiene
Keep tools, lubricants, cleaning chemicals, and other contaminants away from water intended for domestic use. Any work affecting the borehole or water storage should include suitable precautions to protect water quality.
Common maintenance mistakes to avoid
Waiting until the system completely fails
A gradual decline in flow, recurring fault code, or longer tank-filling time may be an early warning. Recording and investigating these changes can help prevent avoidable interruptions.
Assuming every fault is caused by the pump
A pump may be functioning correctly while the controller, solar array, water-level sensor, pipework, or borehole yield limits performance. Diagnose the system as a whole before replacing expensive components.
Ignoring changes in borehole water levels
Seasonal and operational changes can affect the available water supply. Increasing pump power without understanding the borehole's yield may not solve the problem.
Disabling protective functions
Dry-run, overload, and other protective functions help prevent unsuitable operation. They should not be bypassed merely to stop alarms or force the pump to run.
Using incompatible replacement parts
Replacement controllers, motors, sensors, cables, and protective devices must be compatible with the actual system. Verify model numbers, ratings, operating requirements, and manufacturer guidance before installation.
Cleaning panels unsafely
Improper access, abrasive cleaning, and unsuitable chemicals can damage the installation or create a safety hazard. Use approved methods and suitable access arrangements.
Keeping no maintenance history
Without records, it becomes harder to determine whether a problem is new, recurring, or associated with a previous repair. Even a simple log of flow rate, fault codes, and service dates can improve diagnosis.
When to arrange professional solar borehole pump servicing
Professional assessment is advisable when the pump fails to start, water output falls unexpectedly, the controller repeatedly trips, cables show damage, the system overheats, water-level protection activates frequently, or a tank control fails.
It is also sensible to arrange a technical inspection after major electrical storms, physical damage, significant changes in water demand, or repairs that may affect controller configuration or pump performance.
A useful service should establish the reported symptoms, inspect the accessible installation, collect relevant measurements, identify probable causes, and explain which repairs are necessary. Where the evidence is inconclusive, further testing may be required before a definitive diagnosis can be made.
How Pro-Logic Technologies Limited supports solar borehole maintenance
Pro-Logic Technologies Limited supports electrical and technical service requirements, including assessment of electrical components, fault investigation, and maintenance planning for relevant installations. For borehole-related enquiries and water pumping requirements, the company works with Hydrosol Drilling Solution.
A maintenance enquiry is more useful when it includes the pump and controller model, a description of the symptoms, photographs of the accessible equipment, the approximate installation date, and any fault codes or recent flow measurements.
Owners should also indicate whether the installation supplies a home, farm, livestock project, institution, or commercial property. This helps clarify the water demand and the operating conditions that need to be considered.
Contact details
Company: Pro-Logic Technologies Limited
Phone: 0723763173
Website: https://prologictecnologies.co.ke
Borehole-related enquiries: Hydrosol Drilling Solution
Frequently asked questions about solar borehole pump maintenance
How often should a solar borehole pump be serviced?
The interval depends on the pump model, controller, operating hours, site conditions, water quality, and manufacturer's recommendations. Routine visual observations can be carried out frequently, while detailed electrical and hydraulic inspections should be scheduled according to risk and the equipment's requirements.
Can dirty solar panels cause low water output?
Yes. Contamination or shading can reduce the power available to the pump and may lower output under some operating conditions. However, low output can also result from borehole water-level changes, pipe restrictions, leaks, controller faults, or pump problems. Diagnosis should consider all these possibilities.
Why does the pump stop when the sun is still shining?
Sunlight alone does not prove that sufficient usable electrical power is reaching the pump. Possible causes include cloud variation, shading, voltage drop, controller faults, motor overload, a tank-level signal, or dry-run protection. The controller's recorded fault information and suitable electrical measurements can help identify the cause.
Should a submersible pump be removed for every service?
No. Many routine checks can be performed without removing the pump. Removal should be considered when diagnostic evidence indicates a problem that cannot be adequately assessed in place, or when the manufacturer's servicing requirements call for it.
Can maintenance increase borehole yield?
Maintenance can identify restrictions, pump problems, leaks, and other factors that reduce delivered water. It cannot guarantee an increase in the natural yield of the borehole. If the borehole cannot sustainably meet demand, a professional assessment and appropriate water-management measures are required.
Does a solar borehole system need batteries?
Not necessarily. Some systems pump directly from solar power during suitable daylight conditions and deliver water into a storage tank. Other designs incorporate batteries or alternative power sources where the application requires them. The correct configuration depends on demand, available sunlight, storage, and system design.
What information should be recorded when the pump stops?
Record the time, weather and sunlight conditions, controller fault code, tank level, recent water output, and any unusual noise or visible problem. Do not open electrical enclosures or attempt unsafe testing. Provide the information to the authorised technician.
Is solar borehole pump maintenance necessary if the system is working?
Yes. A system that appears to be working can still develop loose connections, panel contamination, leaks, sensor problems, or gradual performance changes. Preventive inspection helps identify issues before they cause an interruption.
Conclusion
Reliable solar borehole water supply depends on more than the pump and solar panels. The controller, cables, protective devices, borehole water level, delivery pipes, storage tank, sensors, and distribution equipment must work together within their design limits.
A structured solar borehole pump maintenance programme combines routine observations, planned inspections, safe electrical testing, hydraulic performance monitoring, and accurate maintenance records. It helps property owners distinguish equipment faults from water-supply limitations and make informed decisions about repairs, servicing, and system improvements.
For solar pumping and electrical maintenance enquiries, contact Pro-Logic Technologies Limited on 0723763173 or visit https://prologictecnologies.co.ke. For borehole-related enquiries, Hydrosol Drilling Solution can also be referenced through the company's borehole service arrangements.
The next article in this series is Post 10: Complete solar borehole water supply solutions, covering system planning, borehole assessment, pump selection, solar array sizing, controllers, storage tanks, distribution networks, installation coordination, and long-term operation.