Call for Commercial Proposals for the Supply and Installation of Solar Thermal Collectors
The Public Association DMO Karakalpakstan invites commercial proposals for the supply and installation of solar thermal collectors under the project “Establishing a Demonstration Model for the Restoration of Degraded Land and Sustainable Land Management at the Community Level in Arbashy Village, Nukus District, Republic of Karakalpakstan”, implemented within the framework of the United Nations Development Programme (UNDP), with support from the Global Environment Facility Small Grants Programme (GEF SGP) and the United Nations Office for Project Services (UNOPS).
Under the project, solar water heating systems with thermal collectors and 100-litre storage tanks are to be installed in each of two households used as guesthouses in the Arbashy Village Citizens’ Assembly area of Nukus District.
Requirements for Commercial Proposals
Commercial proposals must include the following information:
- Brand, model and manufacturer of the solar thermal collector;
- Country of manufacture;
- Availability of equipment and installation documentation and certificates;
- Number of vacuum tubes and total collector area;
- Nominal and usable capacity of the storage tank;
- Thermal output and technical specifications of the system;
- Separate pricing for each household and the total cost of both systems;
- Delivery, installation and commissioning costs;
- Warranty periods;
- Service and maintenance conditions;
- Delivery and installation timelines;
- Validity period of the commercial proposal and payment terms.
Technical Requirements
- The solar thermal collector must be a new, factory-manufactured vacuum tube system designed for domestic hot water supply.
- The system must include a collector, an insulated hot water storage tank, and all necessary components to ensure safe and reliable operation.
- Where necessary, the system must include a circulation pump, control unit, temperature sensors, heat exchanger, piping, valves, expansion tank and other protective components.
- The supplier must justify the storage tank capacity and collector area based on each household’s actual hot water demand, number of residents and operating conditions.
- The system must be suitable for the climatic conditions of Karakalpakstan, including low winter temperatures.
- All piping and the storage tank must be equipped with thermal insulation.
- Collector mounting structures must withstand outdoor conditions and wind loads.
- Appropriate measures must be provided to protect the system against water overheating, excessive pressure and freezing during winter.
Delivery, Installation and Warranty Requirements
The commercial proposal must include the following costs:
- All required equipment and components;
- Delivery of the equipment to the site and unloading;
- Mounting structures, piping, fittings and thermal insulation;
- Installation and commissioning;
- Testing of system tightness, water circulation and heating performance;
- Technical passports, operating instructions and warranty documentation;
- Instructions for household owners on the proper operation of the system.
Warranty and service requirements:
- Solar thermal collector and storage tank: a warranty of at least 5 years, provided this period is confirmed by the manufacturer;
- Installation works and leak-tightness of connections: a warranty of at least 3 years;
- System servicing and technical maintenance: for a minimum of 3 years from the date of commissioning.
The supplier must be a business entity registered in accordance with the legislation of the Republic of Uzbekistan and must possess the necessary resources and capabilities to perform the required works.
The commercial proposal must be accompanied by documents confirming the company's registration, technical passports for the equipment, conformity documents (if available), and information on the company's experience in carrying out installation works.
Submission of Commercial Proposals
Commercial proposals must be submitted by 17:00 on 27 October 2026 to the following email address: welcome@dmo-karakalpakstan.uz.
Contact numbers: +998 77 789 07 38, +998 97 356 70 79.
The commercial proposal must specify the company's full legal name, contact details, the full name of the responsible person, and the total proposed price.
