Energy Efficiency & Renewable Technology DPS

This Dynamic Purchasing System (DPS) has been established to support the inspection, repair, and replacement of energy efficiency measures and renewable technology installations.
The DPS will operate independently but will complement the LHCPG N9 framework, ensuring that a comprehensive range of renewable and energy-efficient solutions are accessible.

The scope of this DPS includes:
- Heating and ventilation
- Electrical energy systems
- Insulation
- Metering and controls
- Emerging technologies
- Multidisciplinary services
The aim is to provide contracting authorities with a flexible route to procure innovative, low-carbon solutions that align with sustainability goals, funding requirements, and regulatory compliance.
Given the evolving nature of the renewable energy sector, this DPS has been structured to allow for future expansion, with the flexibility to introduce additional lots in response to market demand. This ensures that emerging technologies and government-backed initiatives, such as hydrogen heating, BIM solutions, smart metering, and multidisciplinary renewable projects, can be incorporated without requiring a new procurement process. In line with Public Contracts Regulations (PCR) 2015, any future modifications will be transparently managed, ensuring compliance while maintaining an agile approach to procurement. Through this DPS, public sector bodies will have access to qualified suppliers who can deliver high-quality, energy-efficient solutions that contribute to decarbonisation targets and environmental sustainability.

Lot 1: Ground Source Heat Pumps (GSHP) — Regular inspection and maintenance of ground source heat pumps (GSHP) are essential for system efficiency, longevity, and consistent heating and cooling performance. This includes checking key components for wear or damage, ensuring proper refrigerant and antifreeze levels, and maintaining electrical and mechanical parts for optimal operation. The following works are included but not limited to:
- Routine Inspection
Inspecting the heat pump unit for leaks, unusual noises, or other signs of distress, checking piping connections for leaks or corrosion, and monitoring ground loop pressure levels to ensure there are no leaks in the system.
-Filter Cleaning and Replacement
Cleaning or replacing air filters in the heat pump to prevent airflow restrictions, ensuring efficient operation and maintaining indoor air quality.
-Antifreeze Solution Check
Testing the antifreeze concentration within the system, topping up or replacing the fluid as necessary to prevent freezing and ensure efficient heat exchange.
-Ductwork Inspection
Inspecting and cleaning ducts to maintain proper airflow, sealing leaks, and repairing any damage to preserve system efficiency and performance.
-Ground Loop Pressure Tests
Conducting pressure tests to verify the integrity of the loop system, identifying and repairing any leaks or other issues that may impact performance.
-Electrical Component Checks
Inspecting and testing electrical components, including thermostats, circuit boards, and capacitors, and replacing or repairing any faulty parts to ensure reliable system operation.
-Thermostat Calibration
Calibrating the thermostat to ensure accurate temperature control, optimising system response to maintain a consistent indoor climate.
Lot 2: Solar PV — Regular inspection and maintenance of solar photovoltaic (PV) systems are essential to ensure optimal energy generation, system longevity, and electrical safety. This includes checking structural integrity, electrical connections, and performance monitoring to identify and resolve any issues. The following works are included but not limited to:
- Routine Inspection
Conducting annual or bi-annual inspections to check for panel cleanliness, visible damage, and overall system integrity, ensuring the system operates efficiently.
- Component Checks
Inspecting mounting and support structures for corrosion or damage, verifying inverter functionality, and assessing wiring and connections for wear or faults that could affect performance.
- Grounding System Verification
Testing grounding systems for continuity to prevent electrical hazards and ensure compliance with safety standards.
- Cleaning
Removing dust, dirt, bird droppings, and other debris from panels to maintain maximum energy absorption and efficiency.
- Performance Monitoring
Assessing system performance to identify potential reductions in efficiency, diagnosing issues related to shading, wiring faults, or inverter failures.
- Inverter Maintenance
Checking and replacing inverter components such as fans and capacitors, or undertaking a full replacement if required to maintain stable energy conversion.
- Electrical System Checks
Inspecting and testing electrical connections, replacing damaged wiring, and ensuring protection devices, such as surge protectors and circuit breakers, are fully operational.
Lot 3: Battery Storage — Regular inspection and maintenance of battery storage systems are essential for ensuring efficiency, safety, and long-term reliability. This includes monitoring battery health, checking electrical connections, and maintaining ventilation to prevent overheating. The following works are included but not limited to:
- Routine Inspection
Conducting monthly or annual inspections to identify leaks, corrosion, physical damage, and ensuring adequate ventilation and clearance around battery enclosures for stability and safety.
- Component Checks
Visually inspecting battery racks, enclosures, and support structures for signs of wear, ensuring stability and compliance with safety regulations.
- Charge and Health Monitoring
Utilising battery management systems to track voltage, current, temperature, and state of charge, diagnosing performance issues, and preventing potential failures.
- Cleaning and Corrosion Prevention
Removing corrosion, dust, and residue from battery terminals and connections, ensuring uninterrupted electrical conductivity and minimising fire risks.
- Temperature and Ventilation Maintenance
Ensuring temperature control and ventilation systems function effectively to prevent overheating and optimise battery efficiency.
- Connection and Cable Checks
Inspecting and tightening electrical connections, replacing worn or damaged cables and terminals to maintain system integrity and performance.
- Battery Replacement and Recycling
Assessing battery lifespan, replacing deteriorated units, and ensuring safe and environmentally responsible recycling or disposal of old batteries.
- Software Updates
Installing firmware and software updates to optimise battery performance, improve efficiency, and integrate new functionalities where applicable.
Lot 4: Electric Vehicle Charging — Regular inspection and maintenance of EV charging stations are essential to ensure safe operation, reliability, and compatibility with evolving vehicle technologies. This includes routine checks, cleaning, and software updates to maintain functionality and user safety. The following works are included but not limited to:
- Routine Inspection
Conducting monthly or annual inspections to assess cables, plugs, and connectors for wear, damage, or corrosion, and ensuring the station's housing and structure remain secure and intact.
- Physical and Interface Checks
Inspecting the charging station's status indicators and user interface elements for proper functionality, ensuring a seamless user experience.
- Cleaning and Environmental Protection
Removing dirt, grime, and debris from the housing and interface surfaces, and keeping electrical components free from dust and moisture to prevent malfunctions.
- Electrical Safety Checks
Testing ground fault circuit interrupters (GFCIs) to confirm they are functioning correctly, and inspecting all electrical connections and protective devices for safety and compliance.
- Software Updates
Installing firmware and software updates to enhance performance, improve security, and ensure compatibility with all expected EV models.
- Component Replacement
Replacing worn or damaged charging cables, plugs, circuit breakers, protective devices, and user interface elements such as displays and signage to maintain operational efficiency and safety.
Lot 5: Commercial and Communal Heating systems — Regular inspection and maintenance of heating systems ensure efficiency, prevent breakdowns, and extend the lifespan of equipment. This includes checks on key components, cleaning, calibration, and necessary repairs to maintain safety and optimal performance. The following works are included but not limited to:
- Routine Inspection
Inspecting boilers, burners, and heat exchangers for efficiency and wear, checking radiators, pipes, and valves for leaks or corrosion, and assessing pumps, fans, and control systems for proper operation.
- Boiler Maintenance
Cleaning boiler interior surfaces, inspecting and replacing gaskets and seals, and testing safety and control devices to ensure proper function.
- Pump and Motor Servicing
Lubricating bearings and replacing worn belts, checking and adjusting pump alignment, and testing motor operation, replacing if underperforming.
- Pipe and Valve Checks
Inspecting pipes for corrosion or leakage, testing valves for leaks and correct operation, and insulating exposed pipes to improve heat efficiency and prevent freezing.
- Radiator and Convector Maintenance
Bleeding radiators to remove air pockets, cleaning convector fans and filters, and inspecting and adjusting thermostatic radiator valves.
- Control System Calibration
Calibrating thermostats and checking timer settings, testing zone controls and sensors for correct response to temperature changes, and updating or upgrading control system software as required.
- Heat Exchanger Cleaning
Removing scale and sludge from heat exchangers, inspecting for cracks or wear, and replacing components if necessary.
- Filter Replacement and Air Quality
Replacing or cleaning air filters in forced air systems, inspecting air intakes and exhausts for blockages or debris, and ensuring proper airflow to maintain indoor air quality and system efficiency.
Lot 6: District heating & network heating — Regular inspection and maintenance of district and network heating systems ensure efficient operation, prevent energy wastage, and extend the lifespan of equipment. This includes checks on key components, leak detection, cleaning, and necessary repairs to maintain system integrity and performance. The following works are included but not limited to:
Routine Inspection
Inspecting pipes for insulation integrity, corrosion, and leaks, checking heat generation equipment such as boilers, renewables, and heat pumps for operational efficiency, and examining pumps, valves, and heat exchangers for proper functioning.
- Leak Detection and Repair
Utilising thermal imaging and pressure tests to detect leaks, repairing any leaks found in pipes or joints to prevent energy wastage and potential water damage.
- Pipe Maintenance
Inspecting and replacing damaged insulation, repairing or replacing sections of piping suffering from corrosion or wear.
- Pump and Valve Maintenance
Servicing pumps and valves to ensure they are operating efficiently, replacing or repairing worn parts such as seals and bearings.
- Heat Exchanger Inspection and Cleaning
Cleaning heat exchangers to remove scale and sludge build-up, checking and replacing gaskets and seals as needed.
- Control Systems Check
Testing control panels and automation systems for proper operation, updating software and firmware to ensure compatibility and introduce efficiency improvements.
- Boiler Maintenance
Cleaning boiler tubes and burners, checking for and repairing any leaks or damages in the boiler system, and testing safety and control devices to ensure proper function.
- Thermal Storage Systems Maintenance
Inspecting tanks and containers for integrity and insulation effectiveness, checking and maintaining pumps and valves used in the storage system.
Lot 7: Building Ventilation (HVAC) — Regular inspection and maintenance of heating, ventilation, and air conditioning (HVAC) systems are essential to ensure efficiency, air quality, and system longevity. This includes inspecting components, cleaning filters and coils, testing controls, and addressing any issues with refrigerant levels, ductwork, and drainage. The following works are included but not limited to:
-Routine Inspection
Inspecting all system components, including fans, motors, belts, and controls, checking heating and cooling units for proper operation, and examining ductwork for leaks, blockages, or damage.
-Filter Replacement
Replacing or cleaning air filters regularly to prevent dust and debris accumulation, ensuring unobstructed airflow and maintaining indoor air quality.
-Cleaning Coils and Fans
Cleaning evaporator and condenser coils to remove dirt and debris, maintaining system efficiency, and cleaning fan blades to ensure effective airflow and operation.
-Checking Refrigerant Levels
Inspecting refrigerant levels, identifying potential leaks, and repairing any detected leaks before recharging refrigerant in line with environmental regulations.
-Inspecting and Testing Controls and Thermostats
Testing thermostats and control systems to ensure accurate operation, calibrating thermostats where readings are incorrect, and verifying system responsiveness to temperature changes.
-Ductwork Inspection and Sealing
Inspecting ductwork for leaks or damage, sealing any leaks with duct sealant to prevent conditioned air loss and improve overall energy efficiency.
-Belt and Motor Maintenance
Inspecting and replacing worn belts, lubricating motors and bearings to reduce wear and ensure smooth operation.
-Drain Line Cleaning
Cleaning condensate drain lines to remove blockages and ensure proper water flow away from the HVAC equipment, preventing system damage and water-related issues.
Lot 8: Air Source Heat Pumps (ASHP) — Regular inspection and maintenance of air source heat pumps (ASHP) ensure efficient performance, energy savings, and system longevity. This includes checking components for wear or damage, cleaning filters and coils, inspecting refrigerant levels, and ensuring all electrical and mechanical parts are functioning correctly. The following works are included but not limited to:
- Routine Inspection
Inspecting the outdoor unit for debris, ice accumulation, or damage, checking the indoor unit for leaks, unusual sounds, or odours, and ensuring all fans and moving parts are unobstructed and operating efficiently.
- Cleaning Coils and Components
Cleaning or replacing air filters every 1–3 months depending on usage and environmental factors, and cleaning evaporator and condenser coils annually to prevent dirt and debris buildup.
- Refrigerant Level Check
Checking refrigerant levels, inspecting for leaks, and recharging refrigerant or repairing leaks as necessary, following environmental guidelines.
- Ductwork Inspection
Checking ductwork for leaks, blockages, and insulation degradation, sealing leaks and clearing blockages where needed to maintain efficiency.
- Electrical Connections and Controls
Inspecting electrical connections for signs of wear or damage, testing thermostat operations and control systems to ensure accurate temperature settings and system responsiveness.
- Fan and Motor Maintenance
Lubricating motors and bearings as required, checking fan blades for wear and damage, and cleaning or replacing components as necessary to ensure smooth operation.
- Defrost Cycle
Ensuring the defrost cycle is functioning properly, checking and maintaining components involved in the defrost cycle for optimal operation and preventing system inefficiencies.