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Title: Solar PV Power System (including LED) Procurement Q&A and Bid Opening Time Tender No.: 2009CGHZ0533 Announcement Date: May 25, 2009 Deadline: May 31, 2009 Tendering Agency: Hefei Tianhai Real Estate Co., Ltd.: Anhui Province-Hefei City Content: With the consent of the purchaser, the answer to the question raised by the bidder of the “Solar Photovoltaic Power System Purchasing†project (project number: 2009CGHZ0533) is as follows:
1. Select whether the bidding of the product other than the reference source of the light source is supported, and whether it affects the score.
A: The bidder can consider the bidding product brand by himself, but the selected product should not be lower than the quality and grade standard of the reference brand.
2, the efficiency requirements of the components are inconsistent: 2.4.1.3 requirements greater than or equal to 15% and 2.4.2.1 requirements component efficiency of not less than 13%, what requirements are subject to bidding?
A: Greater than or equal to 15%.
3. In the drawings provided (Electric Application 7/1), the brand of the equipment is indicated, and whether the bidding must be bidding on the brand.
A: The bidders should choose the equipment brand no less than the quality and grade standards of the brand.
4. In the bidding drawings, the solar cell array power of the system requirements of Building No.1 to No.6 is 1.8KW, and the power of the solar cell array is 5.67KWp in the schematic diagram; the solar cell array of the No.7 building requirements system The power is 2.4KW, and the power of the solar cell array in the schematic is 7.695KWp. Which one is the standard?
A: 2.0KW; 2.5KW respectively.
5. The working principle of the solar power supply system is ambiguous. Through our understanding of the requirements of the bidding documents and drawings, the design intent is: (1) application of solar energy system to achieve energy saving (2) priority use of photovoltaic power generation in the case of photovoltaic power generation, The city power is added. If our understanding is correct, the understanding of the bidding documents has the following problems:
From the economic analysis, roughly calculate the total power of the panel in the system is less than 15KW, the total power generation in a year is about 15000 degrees, the economic benefits generated are converted according to the current electricity price, about 9,000 yuan, and the battery life is 5 years. In this five-year class, the amount of battery replacement will far exceed the power generation revenue. The above power generation is a theoretical value without considering the situation in which the panel generates electricity when the battery is full and the loss of the system.
In order to maximize the use of solar power, the proposed system design is as follows:
The solar energy adopts grid-connected power generation mode, and is connected to the 220V voltage grid to supply power to the load. Each building can be equipped with one 2.5KW grid-connected inverter and one power distribution box;
The LED light source can be powered by EPS emergency power supply. That is, the power supply is provided by the power grid. When the power grid is cut off, the built-in battery is used for emergency power supply. Each building can be equipped with one 3KW emergency power supply.
A: In the single building, the independent solar system is adopted.
6. China's solar cell module production capacity is now the largest in the world, and there are a large number of export and key project application performance. But the drawings and tenders are required to be Kyocera in Japan?
A: The bidder should use the domestic and international high-quality brand solar cell modules approved by the tenderer. It should be maintenance-free during the 10-year warranty period. It is responsible for the free replacement of the quality problems arising during the warranty period.
At the same time, the bidder should use the domestic and international high-quality brand batteries and PV inverters approved by the tenderer. It should be maintenance-free during the 10-year warranty period. It is responsible for the free replacement of the quality problems arising during the warranty period.
7. The load power required by the bidding documents is only about 2KW, while the designed inverter is required to be 10KW. The obvious design is not reasonable.
A: It is 2kW.
8. Technical Q&A on bidding documents
1. In the bidding documents: Considering the country's online subsidy policy for solar power generation in the future, the system design requires that the power conditioner equipment should have the function of solar photovoltaic power generation and grid connection, which is convenient for future photovoltaic system power generation and online use.
Problem: The grid-connected photovoltaic power generation system and the photovoltaic power generation system required by this tender are two completely different technical routes. Currently, the advanced and mature photovoltaic power conditioners do not have the grid-connecting function, and this function cannot be realized temporarily. Power plants that operate independently and in parallel are not subsidized, but also cause huge waste of power generation and equipment. It is recommended to work in the form of an independent power station, or to directly adopt grid-connected power generation.
A: In the single building, the independent solar system is adopted.
9. Bidding documents: The three major unit components selected in the solar photovoltaic system: solar cell modules, power regulators, and energy storage batteries should have more than 10 years of safe and reliable operation experience in worldwide engineering performance, and provide corresponding Proof of project performance.
Question: Due to the late start of the domestic PV market, the PV modules before 1999 were imported, and the domestic products have reached the international advanced level. Can this limit be changed to more than 5 years of safe and reliable operation experience?
A: The terms of the bidding documents are adjusted to be; they should have more than 5 years of safe and reliable operation experience in the worldwide engineering performance, and provide corresponding engineering performance certificates.
10. Inconsistencies in the tender:
2.4.1.3 In order to fully ensure the electrical matching and consistency of solar modules, and ensure the safe and reliable operation of the whole set of solar photovoltaic power system, the system should use high quality monocrystalline silicon solar modules; conversion efficiency ≥15%, should be good Low light responsiveness. .
2.4.2.1 Solar cell array
- The efficiency of the module is not less than 13% (the data of the relevant unit must be certified);
Problem: The weak light response of single crystal silicon is worse than that of polysilicon, and the conversion efficiency of components required by the two conditions is different. If the latter requirement is met, the current low-efficiency polysilicon module can be satisfied. Can polysilicon products be used for bidding?
A: The use of high quality monocrystalline silicon solar cell modules, conversion efficiency ≥ 15%.
11, solar power regulator
The bidding documents mentioned: In order to ensure the expansion of solar photovoltaic power system in the future, the power regulator should be modular design, frame-mounted, the power module of each unit has a capacity of 10kW, and the power regulators of 20kW-30kW power class are all It can be realized by parallel expansion of power modules, which is simple and reliable to use;
Problem: According to the aforementioned load, each PV power plant has a maximum of 2kw or 2.5kw, and there are few opportunities for the corridor lights to be lit at the same time. The minimum unit of 10kw for the inverter will cause the inverter efficiency to be too low, resulting in equipment. And the waste of funds, can you choose the power according to your own calculation? When it is to be expanded in the future, the loss caused by replacing equipment is also better than that of the school.
Answer: The capacity of the photovoltaic power station is unchanged, and the inverter is adjusted according to the actual situation.
12. Your unit pointed out in the bidding documents that “the solar cell module uses high quality monocrystalline silicon solar cell modulesâ€. The actual power generation of amorphous silicon is larger than that of single crystal silicon and polycrystalline silicon at the same power, which is completely suitable for photovoltaic power generation systems, and the single crystal silicon and polycrystalline silicon have technical problems that cannot be overcome at present. So, can you consider using amorphous silicon solar modules?
A: According to the bidding documents.
13. Your unit pointed out in the bidding documents that “in consideration of the future national subsidy policy for solar power generation, the system design requires power conditioner equipment to have solar photovoltaic power generation grid-connected function, which is convenient for future photovoltaic system power generation and online use.†. The performance of the off-grid inverter and the grid-connected inverter is completely different. If the off-grid inverter is used in the system, it will not be connected to the grid in the future.
A: In the single building, the independent solar system is adopted.
14. Your unit pointed out in the bidding documents that LED light source is used as the light source. The LED light source itself is a DC power supply. In the case of using an off-grid inverter, there are two AC/DC conversion processes, resulting in great waste of resources. The energy-saving lamp technology is very mature and stable, and the price is low. So, can you consider using energy-saving lamps as a light source?
A: According to the bidding documents.
15. If your unit uses off-grid power generation, it is recommended that the lamp source and system be separately bidding to facilitate the maintenance of the winning bidder. If it is connected to the grid, it is recommended to use energy-saving light source to save costs.
A: According to the bidding documents.
16. The payment method of the bidding documents is adjusted as follows: (1) The goods are delivered to the designated construction site of the purchasing unit and organized by the purchasing unit, the supervision company and the installation unit to meet the agreed quality standards within 7 days, and Party A shall pay 70% of the total amount of the goods. ;
(2) Within 10 days after all installations are adjusted and received, and Party A is qualified within 10 days, Party A shall pay 95% of the total amount of the goods according to the actual issued notice and the qualified number of acceptance;
(3) As the quality guarantee, the balance shall be paid 3% of the total amount of the goods within 15 days after the start of the quality warranty period (no interest), and the remaining balance shall be paid after five years (no interest).
(4) If it is delivered in batches, it will be paid in the same proportion as above;
(5) The bidder shall provide the same amount of invoice when the purchaser pays.
17. The opening time and the deadline for submission of tenders are 15 o'clock on May 31, 2009, Beijing time.
18. The deadline for submitting questions about the bidding documents and this Q&A is 9:00 on May 25, 2009. Company Name: Hefei Municipal Government Procurement Center Contact: He Ping Tel: 0551-2692126 E-mail: Fax: 0551-2692070 Postal Code: 230001 Address: No. 17 Xiangyang Road, Hefei (formerly Hefei Municipal Committee) 4th Floor
1. Select whether the bidding of the product other than the reference source of the light source is supported, and whether it affects the score.
A: The bidder can consider the bidding product brand by himself, but the selected product should not be lower than the quality and grade standard of the reference brand.
2, the efficiency requirements of the components are inconsistent: 2.4.1.3 requirements greater than or equal to 15% and 2.4.2.1 requirements component efficiency of not less than 13%, what requirements are subject to bidding?
A: Greater than or equal to 15%.
3. In the drawings provided (Electric Application 7/1), the brand of the equipment is indicated, and whether the bidding must be bidding on the brand.
A: The bidders should choose the equipment brand no less than the quality and grade standards of the brand.
4. In the bidding drawings, the solar cell array power of the system requirements of Building No.1 to No.6 is 1.8KW, and the power of the solar cell array is 5.67KWp in the schematic diagram; the solar cell array of the No.7 building requirements system The power is 2.4KW, and the power of the solar cell array in the schematic is 7.695KWp. Which one is the standard?
A: 2.0KW; 2.5KW respectively.
5. The working principle of the solar power supply system is ambiguous. Through our understanding of the requirements of the bidding documents and drawings, the design intent is: (1) application of solar energy system to achieve energy saving (2) priority use of photovoltaic power generation in the case of photovoltaic power generation, The city power is added. If our understanding is correct, the understanding of the bidding documents has the following problems:
From the economic analysis, roughly calculate the total power of the panel in the system is less than 15KW, the total power generation in a year is about 15000 degrees, the economic benefits generated are converted according to the current electricity price, about 9,000 yuan, and the battery life is 5 years. In this five-year class, the amount of battery replacement will far exceed the power generation revenue. The above power generation is a theoretical value without considering the situation in which the panel generates electricity when the battery is full and the loss of the system.
In order to maximize the use of solar power, the proposed system design is as follows:
The solar energy adopts grid-connected power generation mode, and is connected to the 220V voltage grid to supply power to the load. Each building can be equipped with one 2.5KW grid-connected inverter and one power distribution box;
The LED light source can be powered by EPS emergency power supply. That is, the power supply is provided by the power grid. When the power grid is cut off, the built-in battery is used for emergency power supply. Each building can be equipped with one 3KW emergency power supply.
A: In the single building, the independent solar system is adopted.
6. China's solar cell module production capacity is now the largest in the world, and there are a large number of export and key project application performance. But the drawings and tenders are required to be Kyocera in Japan?
A: The bidder should use the domestic and international high-quality brand solar cell modules approved by the tenderer. It should be maintenance-free during the 10-year warranty period. It is responsible for the free replacement of the quality problems arising during the warranty period.
At the same time, the bidder should use the domestic and international high-quality brand batteries and PV inverters approved by the tenderer. It should be maintenance-free during the 10-year warranty period. It is responsible for the free replacement of the quality problems arising during the warranty period.
7. The load power required by the bidding documents is only about 2KW, while the designed inverter is required to be 10KW. The obvious design is not reasonable.
A: It is 2kW.
8. Technical Q&A on bidding documents
1. In the bidding documents: Considering the country's online subsidy policy for solar power generation in the future, the system design requires that the power conditioner equipment should have the function of solar photovoltaic power generation and grid connection, which is convenient for future photovoltaic system power generation and online use.
Problem: The grid-connected photovoltaic power generation system and the photovoltaic power generation system required by this tender are two completely different technical routes. Currently, the advanced and mature photovoltaic power conditioners do not have the grid-connecting function, and this function cannot be realized temporarily. Power plants that operate independently and in parallel are not subsidized, but also cause huge waste of power generation and equipment. It is recommended to work in the form of an independent power station, or to directly adopt grid-connected power generation.
A: In the single building, the independent solar system is adopted.
9. Bidding documents: The three major unit components selected in the solar photovoltaic system: solar cell modules, power regulators, and energy storage batteries should have more than 10 years of safe and reliable operation experience in worldwide engineering performance, and provide corresponding Proof of project performance.
Question: Due to the late start of the domestic PV market, the PV modules before 1999 were imported, and the domestic products have reached the international advanced level. Can this limit be changed to more than 5 years of safe and reliable operation experience?
A: The terms of the bidding documents are adjusted to be; they should have more than 5 years of safe and reliable operation experience in the worldwide engineering performance, and provide corresponding engineering performance certificates.
10. Inconsistencies in the tender:
2.4.1.3 In order to fully ensure the electrical matching and consistency of solar modules, and ensure the safe and reliable operation of the whole set of solar photovoltaic power system, the system should use high quality monocrystalline silicon solar modules; conversion efficiency ≥15%, should be good Low light responsiveness. .
2.4.2.1 Solar cell array
- The efficiency of the module is not less than 13% (the data of the relevant unit must be certified);
Problem: The weak light response of single crystal silicon is worse than that of polysilicon, and the conversion efficiency of components required by the two conditions is different. If the latter requirement is met, the current low-efficiency polysilicon module can be satisfied. Can polysilicon products be used for bidding?
A: The use of high quality monocrystalline silicon solar cell modules, conversion efficiency ≥ 15%.
11, solar power regulator
The bidding documents mentioned: In order to ensure the expansion of solar photovoltaic power system in the future, the power regulator should be modular design, frame-mounted, the power module of each unit has a capacity of 10kW, and the power regulators of 20kW-30kW power class are all It can be realized by parallel expansion of power modules, which is simple and reliable to use;
Problem: According to the aforementioned load, each PV power plant has a maximum of 2kw or 2.5kw, and there are few opportunities for the corridor lights to be lit at the same time. The minimum unit of 10kw for the inverter will cause the inverter efficiency to be too low, resulting in equipment. And the waste of funds, can you choose the power according to your own calculation? When it is to be expanded in the future, the loss caused by replacing equipment is also better than that of the school.
Answer: The capacity of the photovoltaic power station is unchanged, and the inverter is adjusted according to the actual situation.
12. Your unit pointed out in the bidding documents that “the solar cell module uses high quality monocrystalline silicon solar cell modulesâ€. The actual power generation of amorphous silicon is larger than that of single crystal silicon and polycrystalline silicon at the same power, which is completely suitable for photovoltaic power generation systems, and the single crystal silicon and polycrystalline silicon have technical problems that cannot be overcome at present. So, can you consider using amorphous silicon solar modules?
A: According to the bidding documents.
13. Your unit pointed out in the bidding documents that “in consideration of the future national subsidy policy for solar power generation, the system design requires power conditioner equipment to have solar photovoltaic power generation grid-connected function, which is convenient for future photovoltaic system power generation and online use.†. The performance of the off-grid inverter and the grid-connected inverter is completely different. If the off-grid inverter is used in the system, it will not be connected to the grid in the future.
A: In the single building, the independent solar system is adopted.
14. Your unit pointed out in the bidding documents that LED light source is used as the light source. The LED light source itself is a DC power supply. In the case of using an off-grid inverter, there are two AC/DC conversion processes, resulting in great waste of resources. The energy-saving lamp technology is very mature and stable, and the price is low. So, can you consider using energy-saving lamps as a light source?
A: According to the bidding documents.
15. If your unit uses off-grid power generation, it is recommended that the lamp source and system be separately bidding to facilitate the maintenance of the winning bidder. If it is connected to the grid, it is recommended to use energy-saving light source to save costs.
A: According to the bidding documents.
16. The payment method of the bidding documents is adjusted as follows: (1) The goods are delivered to the designated construction site of the purchasing unit and organized by the purchasing unit, the supervision company and the installation unit to meet the agreed quality standards within 7 days, and Party A shall pay 70% of the total amount of the goods. ;
(2) Within 10 days after all installations are adjusted and received, and Party A is qualified within 10 days, Party A shall pay 95% of the total amount of the goods according to the actual issued notice and the qualified number of acceptance;
(3) As the quality guarantee, the balance shall be paid 3% of the total amount of the goods within 15 days after the start of the quality warranty period (no interest), and the remaining balance shall be paid after five years (no interest).
(4) If it is delivered in batches, it will be paid in the same proportion as above;
(5) The bidder shall provide the same amount of invoice when the purchaser pays.
17. The opening time and the deadline for submission of tenders are 15 o'clock on May 31, 2009, Beijing time.
18. The deadline for submitting questions about the bidding documents and this Q&A is 9:00 on May 25, 2009. Company Name: Hefei Municipal Government Procurement Center Contact: He Ping Tel: 0551-2692126 E-mail: Fax: 0551-2692070 Postal Code: 230001 Address: No. 17 Xiangyang Road, Hefei (formerly Hefei Municipal Committee) 4th Floor
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