Supply, Delivery, Installing, Testing, Commissioning, Operating, Handing Over and Maintaining Integrated Hybrid Solar PV & Battery Energy Storage System for Bir Ahmed Water Well Field, Aden city in Yemen

New amendment added #4: Amendment #4The purpose of the amendment is to:Amend and upload document "Amendment #2- Annex 04 - Technical Questionnaire". All amended items are highlighted  in red colorAmend and upload document "Amendment #2- Annex 02 - Scope of work and Technical Specifications". Amended phrase is highlighted in red color.Therefore, the follwoing amendment is in effect: Amend  e-Sourcing document tab to add the doucments "Amendment #2- Annex 04 - Technical Questionnaire" and "Amendment #2- Annex 02 - Scope of work and Technical Specifications".All other terms and conditions remain the same

New clarification added: Question 16: We kindly request your clarification regarding BOQ Items 2.21.2 and 2.21.3. We noticed that the technical information provided under these two BOQ items appears to be the same or very similar, particularly regarding the operating voltage, alarm current, dual microprocessors, humidity range, test lamps, and EN54 approval.Answer 16: These are two different items. Please refer to the tender requirement and condition Question 17: Water Pumping System Previous Experience:Could you please clarify the exact scope and categorization required for the "water pumping system" previous experience? Specifically, we have successfully executed a comprehensive contract with a total value of approximately $1.5 million, which included a water pumping system scope (featuring gensets, pumps, and specialized trucks valued at around $600,000) . We would like to confirm if this project experience is acceptable for meeting the tender criteria.Answer 17: Please refer to the tender requirement and condition and documentsQuestion 18: Joint Venture (JV) Eligibility: Is it acceptable to form a Joint Venture (JV) with an international company possessing extensive and relevant industry experience?Answer 18: Please refer to the tender requirement and condition and documentsQuestion 19: Financial Capacity & Current Contract Commitments:Regarding the checklist requirement for "Copy of Financial Capacity - Capacity to undertake this contract within current workload (Annual Turnover RS 0.4 and Current Contract Commitments)", could you please clarify what documentation is specifically required for Current Contract Commitments? Specifically, would you like us to upload copies of our currently undertaken and ongoing contracts, or is a summary schedule / self-declaration sufficient?Answer 19: The docuements to establish compliance are mentioned in the tender doucuments including "Small Works - 6 Solicitation - RFQ 04 Sections II, III, IV, V". Please refer to themQuestion 20: Required Schedules and Unlisted Documents:Could you please clarify what specific schedules are required to be provided? Are we only expected to submit items that have a dedicated upload tab in the document checklist? For instance, we noticed that "organizational structure" is mentioned in the evaluation criteria, yet there is no specific upload tab for it in the document checklist. Could you please advise on how or where we should submit such supporting documents if a dedicated tab is missing?Answer 20: You can upload many documents under at each tab.Question 21: For the Item No. 2.4, AC Totalizer, the specification requires a rated voltage of ≥1500V AC. However, according to IEC 61439-2 for low-voltage switchgear assemblies and IEC 60947-2 for circuit breakers, the standard AC rating is generally up to 1000V AC, while 1500V is typically applicable to DC.Kindly clarify whether 1500V AC is the intended operational voltage, or whether 1000V AC-rated equipment in accordance with IEC/BS standards is acceptable?Answer 21: The required 'Rated voltage not less than 1500V AC' in the BOQ item 2.4.1 is read and applied to the rated insulation voltage (Ui) of the entire totalizer box. This voltage is a reference value used for the design of the electrical insulation and to ensure safety, and it must always be higher than the actual operating voltage, according to standard requirements. The drawing shows the actual operating voltage (Ue) of the system, which is 800V AC. This is the voltage at which the system will operate normally

New clarification added: Question 1: There are  differences between the BOQ and the drawings for the AC Totalizer:Question 1.1: BOQ requires ≥1500V AC, drawings show 800V AC.Answer 1.1: The required 'Rated voltage not less than 1500V AC' in the BOQ item 2.4.1 is applied to the rated insulation voltage (Ui) of the entire totalizer box. This voltage is a reference value used for the design of the electrical insulation and to ensure safety, and it must always be higher than the actual operating voltage, according to standard requirements. The drawing shows the actual operating voltage (Ue) of the system, which is 800V AC. This is the voltage at which the system will operate normallyQuestion 1.2:BOQ specifies 2500A ACB and 9 MCCBs (350A, 3‑pole), drawings do not clearly confirm these.Answer 1.2: Please refer to drawing SH 05Question 1.3: BOQ requires IP41 enclosure, drawings omit IP rating.Answer 1.3: The specification is clear in BOQSurge arresters Type I+II required, drawings mention arrestors but integration is unclear.Answer 1.3: The specification is clear in BOQQuestion 1.4: Busbar rating (3500A), frequency (50Hz), and breaking capacity (≥45kA) appear compliant.Answer 1.4: The specification is clear in BOQ.   Question 2: We are in need to extand the submissions deadline.Answer 2: No further extension will be granted. Question 3: Item 2 – PV Inverters BOQ: 350kW, multi‑MPPT, DC input ≥1500V, Output 800V AC, Efficiency ≥97.5%, IP65. Drawings: 350kW inverters, Output 800V AC, but DC input rating not clearly ≥1500V. Clarification Requested: Confirm DC input compliance with ≥1500V requirement.Answer 3: Please refer to tender document BOQ, drawing and specifications. Thery are clearQuestion 4: Item 3 – AC Totalizer BOQ: Busbar ≥3500A, Main Breaker 2500A ACB, 9 MCCBs (350A), Voltage ≥1500V AC, IP41 enclosure, Surge arrester Type I+II, Breaking capacity ≥45kA.Drawings: Busbar 3500A, fault capacity 50kA, voltage shown 800V AC, MCCBs not specified, IP rating not indicated, surge arrestors mentioned generally. Clarification Requested: Confirm voltage rating (1500V vs 800V), MCCB quantity/specification, IP rating, and surge arrester integration.Answer 4: The required 'Rated voltage not less than 1500V AC' in the BOQ item 2.4.1 is read and applied to the rated insulation voltage (Ui) of the entire totalizer box. This voltage is a reference value used for the design of the electrical insulation and to ensure safety, and it must always be higher than the actual operating voltage, according to standard requirements. The drawing shows the actual operating voltage (Ue) of the system, which is 800V AC. This is the voltage at which the system will operate normally.Question 5: Item 4 – Battery Energy Storage System (BESS) with PCS BOQ: PCS ≥2500kVA, Usable Energy ≥5016kWh, DC voltage 1040–1497V, AC 800V/50Hz, LiFePO4 Tier‑1, IP55/IP65 enclosure, fire suppression, HVAC, monitoring. Drawings: Battery containers and PCS units shown, voltage indicated 800V AC, PCS rating not explicit. Clarification Requested: Confirm PCS kVA rating, enclosure IP protection, and fire suppression compliance.Answer 5: Please refer to tender document BOQ, drawing and specifications. Thery are clearQuestion 6: Item 16.3.2 – Ring Main Unit (RMU) BOQ: 12kV class for 11kV system, 630A, SF6 LBS/VCB, ≥25kA symmetrical, 31.5kA asymmetrical, 20kA/1s, 75kVp. Drawings: RMU 630A, 11kV system, breaker type not specified. Clarification Requested: Confirm RMU type (indoor/outdoor), breaker type (LBS or VCB), voltage class (12kV vs 24kV), breaking current (20kA vs 25kA), and operating mechanism (manual vs manual + motorized).Ansewr 6: Please refer to tender document BOQ, drawing and specifications. Thery are clearQuestion 7: Item 16.3.3 – LV Cabinet (within MV Station) BOQ: 2500A ACB, MCCBs 250A (matching PCS), Fuse + disconnector, Surge protection Type I+II, Protection relays 50/51 and 50N/51N. Drawings: LV cabinets integrated in MVS containers, breaker ratings not fully detailed. Clarification Requested: Confirm breaker ratings, surge protection compliance, and whether protection relays are included in scope.Ansewr 7: Please refer to tender document BOQ, drawing and specifications. Thery are clearQuestion 8: Instrument Transformers (CTs/PTs) BOQ: Parameters not specified. Drawings: CT parameters (ratio, accuracy, burden, windings) not provided. Clarification Requested: Confirm CT/PT parameters and quantities, or advise if standard configuration is acceptable.Answer 8: BOQ item mentioned that the material should be as per international standards, moreover, be as per the manufacturer's recommendation for optimal operation.Question 9: Cable Terminations & Surge Arresters BOQ: Not fully detailed. Drawings: Termination quantity and surge arrester scope unclear. Clarification Requested: Confirm number of cable terminations per unit and whether surge arresters are within supplier scope.Answer 9:  Cable Terminations & Surge Arresters are included as per scope of work of BOQ items and are within supplier scopeQuestion 10: Meters BOQ: Power meters referenced. Drawings: Meter scope not defined. Clarification Requested: Confirm if meters are included in supplier scope; if yes, provide accuracy and communication requirements.With best regards,Answe 10: Meters mentioned in BOQ and accuracy and communication included in drawing SH 06.Question 11: Reference: We respectfully request an amendment to the definition of "Similar Contracts" under Clause 2.2 to include Power Stations."Answer 11: Please adhere to the tender requirement and conditionQuestion 12: Regarding to all transformers in items No 2.15.1, 2.16.1, and 2.17.1, it was not specified to be copper winding, does it mean that Aluminum windings are acceptable.Ansewr 12:  It is Copper, Please see updated Amendment #2- Annex 02 - Scope of work and Technical Specifications page (17,20 &21). And updated Amendment #2- Annex 04 - Technical Questionnaire. Items 16.3.1, 17.3.1 & 18.5Question 13: Regarding to Item No 2.14 NEW LV-MDB in the Bill of quantity shows 1 main ACB and 4 out going breakers, but in the drawings Annex 0 5.4 showed only 3 outgoing, which one is correct.Answer 13: Please Adhere with BOQQuestion 14: Regarding with item no.2.19.1 of  EARTHING SYSTEM , Please provide us the required rod dia and the rod length and please provide us the earth plate size.Shall we include U bolt clamp, rod to cable ? Answer 14: Please see updated Amendment #2- Annex 02 - Scope of work and Technical Specifications page (16)And updated Amendment #2- Annex 04 - Technical Questionnaire Item 10.2item no. 2.19.2 refer to SH-13Question 15: regarding with item no. 2.19.2 , Please provide us the number of way for the required earth bar. Answer 15: item no. 2.19.2 refer to SH-13

New clarification added: Question 1: POINT [2.5.1]: Please clarify the BESS requirement of "Usable Energy Capacity not less than 5,016 kWh per container": Should this capacity be evaluated based on the Nominal Installed DC Nameplate Capacity as per the Tier-1 manufacturer's datasheet at standard conditions?Answer 1: The Capacity shall be evaluated based on Capacity not less than 5,000 kWh as per the Tier-1 manufacturer's datasheet at standard conditions 

New clarification added: Question 1: Regarding Item 2.21.3 – Smoke and Heat Detector in the BOQ, we noticed a discrepancy between the technical specifications stated in the BOQ and those provided in Annex 02 – Scope of Work and Technical Specifications.Upon reviewing both documents, it appears that the technical specification for the Flame Detector has been duplicated and included under Item 2.21.3 – Smoke and Heat Detector on the BOQ . We kindly request you to review both documents and clarify the correct technical specification applicable to Item 2.21.3 – Smoke and Heat Detector.Answer 1: The specifications are clear and contain no duplication

New amendment added #3: Amendment #3The purpose of the amendment is to:Extend the tender's clarification deadline to 30 August, 2026Extend the tender's deadline to 6 Septmeber 2026Amend and upload document "Amendment #1- Annex 04 - Technical Questionnaire". All amended items are highlighted  in red colorAmend and upload document "Amendment #1- Annex 02 - Scope of work and Technical Specifications". Amended phrase is highlighted in red color.Therefore, the follwoing amendment is in effect:Amend e-Sourcing genderal tab to extend clarificaion and tender's deadline  Amend  e-Sourcing document tab to add the doucments "Amendment #1- Annex 04 - Technical Questionnaire" and "Amendment #1- Annex 02 - Scope of work and Technical Specifications".All other terms and conditions remain the same

New clarification added: Question1. RMU Short-Circuit Rating: Please confirm whether an RMU with 20 kA short-time withstand capacity is acceptable instead of the specified 25 kA.Answer 1: Please adhere to the specifications.Question 2. LV Panel Standards: Please confirm whether compliance with IEC standards alone is acceptable where BS standards are referenced, provided the IEC standards are technically equivalent or superior.Answer 2: Please adhere to the specifications.Question 3. Site Altitude:Please confirm the required site/design altitude for equipment selection and derating., is it accurate 2000m ASL?!Answer 3: The Site Altitude is mentioned in the document titled "Amendment #1- Annex 02 - Scope of work and Technical Specifications", page [2]. Please refer to it.Question 4. RMU Arc Venting:Please confirm whether an RMU with downward arc-venting is acceptable, or whether upward arc-venting as specified is mandatory.Answer 4: Please adhere to the specificationsQuestion 5: We noticed that the BOQ has been amended. However, the Technical Questionnaire has not been amended accordingly.Answer 5: An amendment is to be published soon. Please refer to the document titled "Amendment #1- Annex 04 - Technical Questionnaire", items 14.3 , 15.3 and 15.4Question 6: Please confirm what you mean in (Nominal operating cell temperature not less than 70 C° ). ls  the temperature for solar panel cell or operation for the robot ?Answer 6: Nominal operating cell temperature not less than 70 C° for solar panel cellQuestion 7: POINT 2.23.8 Please clarify the requirement of 18,000 BTU/h for the 1.5 TR AC unit: Should the 18,000 BTU/h be the cooling capacity at T3, or the nominal cooling capacity at T1?Answer 7: The cooling capacity at T3Question 8: If T3 is required, would a unit rated 17,600 BTU/h at T3 be acceptable, or should we offer a higher-capacity unit, such as 24,600 BTU/h at T3, while your requirement specifies 18,000 BTU/h?Answer 8: Please adhere to the specifications.Question 9: What is the final required RMU rating?BOQ: RMU 12kV (for 11kV system), 20kA short circuit withstand.Annex 02: RMU rated at 15kV, breaking symmetrical ≥25kA, asymmetrical ≥31.5kA.Annex 04 Questionnaire: RMU 12kV, breaking symmetrical ≥25kA, asymmetrical ≥31.5kA.Answer 9: The specifications are clear; please adhere to them.Question 10 :What is the scope of the auxiliary transformer in MVS01? Drawings show 100kVA auxiliary transformer.Is it within bidder scope of supply or its already existed in the site ?Answer 10: The 100kVA auxiliary transformer in MVS01 within bidder scope of supply. Please refer to the updated Annex 02 - Scope of work and Technical Specifications, page number18Question 11: Can the AC‑side output voltage be revised from 800V to 690V (stepped up to 11kV via transformer)?Answer 11: Please adhere to the specificationsQuestion 12: With reference to BOQ Item 1.2.2 – Steel Structure, including:Item 1.2.2.1 – Ground Level Mounting StructuresItem 1.2.2.2 – PV Inverter StructureWe kindly request your clarification regarding the required corrosion protection system for the structural steel components.The general requirement under Item 1.2.2 specifies: “Hot galvanized steel (min galvanized 120 mic)”However, Items 1.2.2.1 and 1.2.2.2 also refer to galvanized steel components/sections and require:“Providing and applying a coat of approved zinc chromite primer and two coats of synthetic enamel paint over all as specified and directed.”In order to ensure correct technical compliance and accurate pricing, kindly clarify the intended requirement as follows:Does the minimum 120-micron Hot-Dip Galvanizing (HDG) requirement apply to all structural steel components, including columns, beams, rafters, bracing, base plates, purlins and other steel members?If certain structural steel components are not required to be HDG, please clarify which components shall instead be protected using the specified Zinc Chromate primer and two coats of Synthetic Enamel paint.Please also clarify whether the specified Zinc Chromate primer and two coats of Synthetic Enamel paint are required in addition to the 120-micron HDG coating for all galvanized steel components, i.e. as a duplex corrosion protection system, or whether the painting system is intended as an alternative corrosion protection system for non-galvanized components.Answer 12: All structural steel members including columns, beams, rafters, purlins, base plates, bracket frames, bracings, and accessories must be Hot-Dip Galvanized (HDG) with a minimum coating thickness of 120 microns in strict compliance with General Item 1.2.2 and the project drawings. The Zinc Chromate primer and Synthetic Enamel paint mentioned in Items 1.2.2.1 and 1.2.2.2 are required for site touch-ups and field repairs of any cut edges, drilled holes, or weld areas affected during fabrication and erection. All costs associated with Hot-Dip Galvanizing (min 120 µm), materials, fabrication, concrete foundations, erection, and site touch-up painting shall be fully inclusive within the unit rates submitted for Items 1.2.2.1 and 1.2.2.2, with no separate payment provided.Question 13: Regarding to electrical works item No 2.14 NEW LV-MDB we can't locate it on the drawings. Answer 13: The specifications are clear in the BoQ. Please refer to the Annex 05.4 – Electrical drawings of Solar PV-microgrid system on sheet(SH-07)  Question 14: Please confirm whether a DX split-type inverter air-conditioning unit with a nominal capacity higher than 1.5 RT may be offered, provided that its certified cooling capacity at T3 operating conditions is not less than 18,000 BTU/h. Also, please confirm whether a Heating & Cooling type unit is acceptable, provided that all the required cooling performance and other technical specifications are fully complied with.Answer 14: Please adhere to the specifications.Question 15: Due to the extensive technical scope of this project, we kindly request an extension of the tender submission deadline to ensure the preparation of a comprehensive bidAnswer 15: An extension will be granted. Please check eSourcing

New amendment added #2: Amendment #2The purpose of the amendment is to:Amend and upload document "Amendment 2- Annex 01 - Bill of Quantity". Amend item no(2.23.8). The amended pharse is hilghlighted in red color Add a tab in the checlist tab for "Technical questionnaire" document filled and stampedTherefore, the follwoing amendment is in effect:Amend  e-Sourcing document tab to add the doucment "Amendment 2- Annex 01 - Bill of Quantity".Amend checklist tab to add a tab for Technical questionnairAll other terms and conditions remain the same

New clarification added: Question 1: We need to visit the site, please specify a day to coordinate and share focal No for the contact ?Answer 1: Interested bidder can go to the site direclty. The project location is mentioned in the Annex 02 - Scope of work and Technical Specifications document, page [2]. Please refer to it

New clarification added: Question 1: Please provide us with the SLD for  NEW LV-MDB mentioned in (BOQ  2.14) ?Answer 1: The specifications are clear in the BoQ.Question 2:We kindly request you to extend the tender submission deadline, as this tender requires thorough technical and commercial study due to its large scope and requirements.?Answer 2: An extension is granted. Please check eSourcing.Question 3: There is no tab for uploading Annex 04 - Technical Questionnaire in the document chicklist?Answer 3: An amendment is to be pusblished soon to add a tab for the technical questionnaire document.

New clarification added: Update to Question 10: POINT 2.23.8: Regarding the requirement for an anodized aluminum outdoor unit body: Please confirm if an outdoor unit cabinet constructed from factory anti-corrosion treated and powder-coated steel—the standard commercial design across major HVAC manufacturers—is accepted as a compliant equivalent. The offered unit meets all other required technical, cooling, sound, and electrical parameters while ensuring full rust and weather protectionAnswer:  An amendment is to be pusblished soon. Updates in item (2.23.8) is in red color. Please refer to Amendment 2- Annex 01 - Bill of Quantity.

New amendment added #1: Amendment #1The purpose of the amendment is to:Extend the tender's clarification deadline to 24 August, 2026Extend the tender's deadline to 1 Septmeber 2026Amend and upload document "Amendment 1- Annex 01 - Bill of Quantity". All amended items are in red color and item no. (2.23.10) of electerical tab is removed from the BoQTherefore, the follwoing amendment is in effect:Amend e-Sourcing genderal tab to extend clarificaion and tender's deadline  Amend  e-Sourcing document tab to add the doucment "Amendment 1- Annex 01 - Bill of Quantity".All other terms and conditions remain the same

New clarification added: Question 1: For Sections 2.15.1 and 2.16.1 – 11 kV RMU & Accessories, please confirm whether air-insulated RMUs can be accepted instead of SF₆-insulated RMUs, as SF₆ RMUs are no longer widely available in the market due to safety and environmental concerns.Answer 1: Please adhere to the specifications.Question 2: No price escalation clause – Sub-Clause 9.6 expressly states Contract Price shall not be adjusted for cost changes. UNOPS may terminate immediately without notice for breaches of Sub-Clauses 4.18, 4.19, 4.25, 4.26, 4.27—no cure period. Employer has sole discretion to grant EOT – "has no obligation to grant" EOT and "not required to exercise this discretion for the benefit of the Contractor."Employer may terminate for "material breach" – undefined term gives Employer broad discretion.No advance payment – mobilization costs must be fully funded by contractor upfront.5% retention – held until Final Completion Certificate (12 months after completion).UNOPS may assign contract to any third party without contractor's consent. Contractor may end up working for an unknown third party;BoQ quantities are estimated – preamble states quantities are "not to be taken as actual and correct quantities." Actual quantities may vary significantly; contractor bears quantity risk unless Variation mechanism applied.*Schedule 3.2.F is marked "Not Applicable" – the Employer has not committed to providing any power supply, grid connection point, or utility hook-up - then not sure who will supply commissioning and testing power (considerable cost).* no clear battery limits for the scope of work (works near / at the boundaries of existing facilities is indicated in the drawings). this is a risk considering the existing facilities are live and energized no underground maps provided for existing UG cables, ...etc. no geotechnical/soil report provided and no soil resistivity provided. can we assume the provided designs (drawings) are verified and at employer risk?Technical specifications referenced in the tender documents are not provided (word document is empty and no download link provided) First fills, commissioning and testing consumables and fills are contractor scope of work.Answer 2: We cannot understand what are your questions. Please specifiy your questions.Question 3: Regarding Point 2.5, we would like to clarify the battery storage capacity and quantity shown in the tender documents.We noted that the layout drawing shows 12 battery cabinets/units, while the description mentions one container with a capacity of 5 MWh.Could you please confirm which of the following is correct:Total capacity is 5 MWh consisting of 12 battery cabinets, orOne complete 5 MWh battery container is required.Kindly confirm the exact quantity, configuration, and total required capacity under Point 2.5 so that we can prepare our offer accordingly.Answer 3:  One complete 5 MWh battery container is required. Question 4: Please clarify the differene between :items in BOQ (2.23.10 and  2.23.13), are they the same or different?Answer 4: An amendment is to be pusblished soon. item no. (2.23.10) is removed. Please refer to Amendment 1- Annex 01 - Bill of Quantity.Question 5: We kindly request clarification on the following technical points regarding the solar street light and pole drawing. 4m Pole: Is a tapered pole required, from approximately 4 inches at the bottom to 3 inches at the top?Answer 5: Please adhere to the specificationsQuestion 6: Battery: The specification states LiFePO4 ≥30Ah. Please confirm the required battery voltage or minimum capacity in Wh.Answer 6: An amendment is to be pusblished soon. Updates in item no.. (2.23.5) is in red color. Please refer to Amendment 1- Annex 01 - Bill of Quantity.Question 7: Base Plate & Anchor Bolts: The drawing shows a 150×150×6mm base plate with M12×300mm anchor bolts. Should these dimensions be followed exactly, or may they be adjusted according to the final pole/light structure and project wind load? Please also confirm the required design wind speed.Answer 7: Please adhere to the specificationsQuestion 8: Please clarify the requirement stated under Item 2.23.Thank you for your clarification.Answer 8: The requirement stated under Item 2.23 is clear, and the specifications are clearly defined. If there is anything that needs clarification, please specify it exactly so we can clarify it accordingly.Question 9: Regarding Schedule 3.9 – Key Personnel Requirements, could you please clarify whether it is mandatory to provide the names of the proposed engineers along with their qualifications and experience at the tender submission stage?Alternatively, would it be acceptable to submit Schedule 3.9 duly signed and stamped, without specifying the names of the engineers, while confirming that we will propose and mobilize personnel who meet or exceed the minimum required qualifications and experience?Answer 9: Please refer to the UNOPS Minimum Requirements and Documents to establish compliance with the criteria under point (3.4) of Part 3: Key personnel proposed of the document titled "Small Works - 6 Solicitation - RFQ 04 Sections II, III, IV, V" Question 10: POINT 2.23.8: Regarding the requirement for an anodized aluminum outdoor unit body: Please confirm if an outdoor unit cabinet constructed from factory anti-corrosion treated and powder-coated steel—the standard commercial design across major HVAC manufacturers—is accepted as a compliant equivalent. The offered unit meets all other required technical, cooling, sound, and electrical parameters while ensuring full rust and weather protectionPOINT 2.23.7·  Noise Level Threshold ($\le 45\text{ dB}$): Physically impossible for a $5\text{ TR}$ ($60,000\text{ BTU}$) unit. Pushing $1,300\text{--}1,500\text{ CFM}$ of air naturally generates $50\text{--}57\text{ dB(A)}$. The $45\text{ dB}$ limit applies to small residential wall splits.·  Outdoor Cabinet Material (Anodized Aluminum): Non-standard in HVAC manufacturing. All major brands build outdoor cabinets using powder-coated, electro-galvanized sheet steel with anti-corrosion protection, which provides better structural strength and durability.Answer 10: An amendment is to be pusblished soon. Updates in item (2.23.7) is in red color. Please refer to Amendment 1- Annex 01 - Bill of Quantity.Question 11: We ask you kindly to extend the submission period , this is because the project is large and needs preparation for a longer period.Answer 11: An extension will be granted. Please check eSourcing.

New clarification added: Question 1:We kindly request you to extend the tender submission deadline, as this tender requires thorough technical and commercial study due to its large scope and requirements.Additionally, the remaining time is not sufficient for us to properly prepare our offer and ensure full compliance with all your requirements.Therefore, we would highly appreciate your consideration of our request and granting us an extension of the submission deadline to allow sufficient time to prepare a complete and competitive proposal.Answer 1: The tender duration is enough to prepare complete offers. The tender deadline remains unchanged.Question 2: When is the prebid meeting?Answer 2: Bidders are encouraged to attend the pre bid meeting as per the following details:Prebid meeting- Supply, Delivery, Installing, Testing, Commissioning, Operating, Handing Over and Maintaining Integrated Hybrid Solar PV & Battery Energy Storage System for Bir Ahmed Water Well Field, Aden city in YemenMonday, August 17 · 10:00 – 11:00amTime zone: Asia/RiyadhGoogle Meet joining infoVideo call link: https://meet.google.com/kuy-dtnf-rwwOr dial: ‪(US) +1 240-442-2477‬ PIN: ‪252 722 846‬#More phone numbers: https://tel.meet/kuy-dtnf-rww?pin=3065726790596 

New clarification added: Question (1): Financial Capacity: Avaliability of Liquidity (Cash) . Please advise if  Finacial  Statement  for 2025 or 2024 shall cover this requirement "The bidder shall have sufficient liquidity for the implementation of the contract of not less than USD 400,000"Answer (2): Please refer to the UNOPS Minimum Requirements and Documents to establish compliance with the criteria under point (2.3) of the QUALIFICATION CRITERIA of the document titled "Small Works - 6 Solicitation - RFQ 04 Sections II, III, IV, V"