MODIFICATION
23 -- Trailer Mounted Stand Alone Photovoltaic System
- Notice Date
- 1/26/2011
- Notice Type
- Modification/Amendment
- Contracting Office
- IMR - YELL - Yellowstone National Park Contracting OfficePO Box 168 Yellowstone National Park WY 82190
- ZIP Code
- 82190
- Solicitation Number
- Q1574110032
- Response Due
- 2/14/2011
- Archive Date
- 1/26/2012
- Point of Contact
- Andrea Brew Contract Specialist 4065706408 Andrea_brew@nps.gov;
- E-Mail Address
-
Point of Contact above, or if none listed, contact the IDEAS EC HELP DESK for assistance
(EC_helpdesk@NBC.GOV)
- Small Business Set-Aside
- Total Small Business
- Description
- THIS AMENDMENT IS TO ALLOW A TRIPLE AXLE TRAILER. ALL OTHER SPECIFICATIONS REMAIN THE SAME. The following is answers to vendor questions submitted. REMINDER ALL QUESTIONS MUST BE SUBMITTED IN WRITING VIA FAX OR EMAIL - NO PHONE CALLS. EMAIL: Andrea_Brew@nps.gov or FAX: 307.344.2079 It is not physically possible to fit a 9kw solar array onto the 28' trailer. That is approximately 750sqft of solar modules. Can part of the array be installed on pole mounts next to where the trailer will be parked? NO WITH NEWER TECHNOLOGY USING 225 WATT PANELS THE ARRAY WILL FIT ON THE TRAILER SIZE REQUESTED Your scope of work states an enclosed trailer. With the large amount of solar panels hanging off of or mounted onto an enclosed trailer's roof, there WILL be wind loading issues due to the center of gravity being so lop sided with this configuration. Can the trailer be a flat deck trailer with the batteries and electronics housed inside of vented enclosures? NO. NO DEVIATIONS WILL BE ACCEPTED The Power requirements are stated in 3 different ways in your RFQ. Could you please clarify this for me? I have bolded and underlined the three different sentences that say 3 different things. We need to know the 'Peak Load' requirement, and the 'continuous' power requirements on the inverters in order to properly configure the system for you. We can built to either the 14kw or the 28kw peak/surge requirement. Concurrent/simultaneous load is different from Peak/Surge load which are used interchangeably in the industry. It is basically simply doubling the Inverters required which will result in an increased cost. Please let me know which number your folks are looking for and we will quote accordingly. AN ENERGY AUDIT LOAD INFORMATION WAS ACQUIRED FROM ONE DAY OF DATA COLLECTION AND WAS USED AS A REFERENCE AND DOES NOT ACCOUNT FOR OUR NEED FOR A STRONGER SYSTEM FOR THE SAYS WE HAVE HIGHER ELECTRICAL LOAD AND THE POSSIBILITY OF FUTURE ELECTRIC LOAD BEING ADDED. THEREFORE WE LISTED THE INVERTERS TO BE A MINIMUM OF 14,000 WATTS COMBINED POWER FOR THE 120/240 VOLT AC SYSTEM. ONE EXAMPLE WOULD BE TO COMBINE 4 EACH OF 4.4KW INVERTERS TO EQUAL 17.6 KW COMBINED TOTAL WITH A 35.2 KW SURGE. WE WOULD ACCEPT A LARGER THAN MINIMUM REQUIREMENT. Some industrial solar battery manufacturers have a 75% to 80% depth of discharge rating, to accomplish 3 days autonomy can this % DOD be used if the battery is capable and approved by the battery manufacturer? You state that the Batteries provide 3 days autonomy; however, you also require that the Batteries have at least 4,800 amp hours. With these calculations 4,800 amp hours capacity based on your demand of 21kw per day, this give you over 6 days of autonomy. As a result you are doubling the actual number of Batteries required for the 3 days of autonomy not to mention doubling the weight and cost. Could you please clarify for us? AGAIN, ENERGY AUDIT LOAD INFORMATION WAS ACQUIRED FROM ONE DAY OF DATA COLLECTION AND WAS USED AS A REFERENCE AND DOES NOT ACCOUNT FOR OUR NEED FOR A STRONGER SYSTEM. THE 3 DAY AUTONOMY WAS MEANT AS A MINIMUM OF 3 DAYS, BUT DEPENDING ON THE ACTUAL ELECTRICAL LOAD THE BATTERIES MIGHT ACTUALLY LAST 6 DAYS. WE DECIDED ON THE 4,800 AMP HOURS TO ALLOW FOR ADDITIONAL ELECTRICAL LOAD AND FUTURE GROWTH. To cover 9,000 Watts you would need around 66 solar panels which is not functionally plausible for a 28' trailer. Please clarify this requirement. AGAIN THE ENERGY AUDIT LOAD WAS MEANT AS A REFERENCE (21KW) BUT FOR THE ACTUAL SIZE OF THE PV ARRAY WE WANT 9,000 WATTS. WITH NEWER TECHNOLOGY USING 225 WATT PANELS THE ARRAY WILL FIT ON THE TRAILER SIZE REQUESTED. Is the 28' length the maximum length allowed? YES - DUE TO THE LOCATION AND ROAD CONDITIONS THE REQUEST MUST STAY WITH THE 28' LENGTH If so does the tow tongue count into the total length or just the actual dimension of the trailer box itself? ACTUAL DIMENSIONS Does the floor have to be constructed of treated wood or can it be constructed of something more durable like rolled steel, etc? THE REQUEST STATES TREATED WOOD. NO DEVIATION WILL BE ACCEPTEDIs the 8.5 foot width the minimum width allowed as most trailers as well as vehicles are not that wide. Most we see are between 5'6" and 7' wide which are more that adequate to handle these load requirements. THE REQUEST STATES 8.5 WIDTH - WE ARE AMENDING THE REQUEST TO ALLOW UP TO A TRIPLE AXLE. You state that the trailer have aluminum skin with a frame constructed of 2x6 or 4x8 tube. Can it also be constructed with heavy duty durable rolled steel in conjunction with aluminum and/or stainless steel? NO. THE REQUEST STATES THE MATERIALS WE WANT FOR FRAME CONSTRUCTION, NO DEVIATION WILL BE ACCEPTED. Could you please clarify as to the need for a side door being 48' x 72'? The request states we want a side door 48' x 72'. WE WILL NOT ACCEPT A SMALLER DOOR. NO DEVIATIONS WILL BE ACCEPTED. If the solar trailer is fully functional and meets or exceeds all of your other requirements then can the side door(s) be a different size if the design of such trailer is such that it would fully provide you with total access to all the trailer components as necessary with the proper designed doors in locations as necessary? THE DOOR MUST MEET THE SPECIFICATIONS AS REQUESTED. NO DEVIATION WILL BE ACCEPETED. Could you please clarify as to the need/purpose of having a sliding rear ramp? THE REQUEST STATES A SLIDING REAR RAMP IS REQUIRED. If the solar trailer is fully functional and meets or exceeds all of your other requirements then is the sliding rear ramp necessary if the design of such trailer is such that it would fully provide you with total access to all the trailer components as necessary with the proper designed doors in locations as necessary? YES THE REQUIREMENT STATES A STANDARD SLIDING RER RAMP IS REQUIRED. NO DEVIATION WILL BE ACCEPTED. You state that "assembly materials and hardware for the Solar Array be aluminum or stainless steel." Can it also be constructed with heavy duty durable rolled steel in conjunction with aluminum and/or stainless steel? THE REQUEST STATES ALUMINUM OR STAINLESS STEEL NO DEVIATION WILL BE ACCEPTED. You state to locate the power harness to site generator connections, etc on left side of trailer (street side). Can these connections be located at the rear of the trailer so long as all electrical specifications are meet or exceeded? NO DEVIATIONS WILL BE ACCEPTED
- Web Link
-
FBO.gov Permalink
(https://www.fbo.gov/spg/DOI/NPS/APC-IS/Q1574110032/listing.html)
- Place of Performance
- Address: Yellowstone National Park, WY
- Zip Code: 821900168
- Zip Code: 821900168
- Record
- SN02367327-W 20110128/110126234424-198173032a7a392e6113a017468179cf (fbodaily.com)
- Source
-
FedBizOpps Link to This Notice
(may not be valid after Archive Date)
| FSG Index | This Issue's Index | Today's FBO Daily Index Page |