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  • Solar System Needed in Hawthorne NV

    I'm looking for a resource to help put together and install a very resilient independent (off-grid) DC power system for 24/7 day/night time operations in a remote mountaintop location near Hawthorne Nevada.

    Requirements - 1000+Ah, 4+kW (nominal) continuous alternative power. Equipment receiving power requires 48vdc @ 4A and 24vdc @ 6A.

    Must meet the following requirements:

    Solar PV Array with area footprint less than or equal to 40m^2 and must survive 99 mph wind speeds.

    Must have 36+ hours of continuous reserve power battery back-up at 1000+Ah.

    Must have a 6kW DC backup LP generator/charger including the liquid propane (LP) fuel tank and connectors, fuel tank must large enough to only require filling/replacing twice a year.

    Must have a power management system for autonomous operations through monitoring/controlling supply/demand (switching power sources, charging batteries, and startup/shutdown).

    The system's equipment must operate uninterrupted in austere high-desert climate conditions from extreme dry heat in the summer to extreme wet cold in the winter. With proper environmental enclosures to protect against this environment.

    This system needs to be very resilient for a military application of which may be replicated in 30 different locations worldwide. The contract is ready to go asap. Jay (if you need to contact them PM)
    ---Mod Note: Not something we usually see on the Forum, but I see no reason not to allow it.
    Last edited by inetdog; 10-27-2015, 06:07 PM.

  • #2
    Your specification of 1000+AH is not meaningful without a voltage attached. And the 4+kw is meaningless without a time component. Do you really mean a 192kWh per day system? (4kW times 24 hours.)
    But I am sure all of that will be worked out with the engineer you end up with.
    SunnyBoy 3000 US, 18 BP Solar 175B panels.

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    • #3
      Is it sfe to assume there are two voltage requirements and the load on each is continuous
      NABCEP certified Technical Sales Professional

      [URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]

      [URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)

      [URL="http://www.gaisma.com"]www.gaisma.com[/URL]

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      • #4
        Seems that could be done easily at at least that location. Other locations may vary due to insolation
        And it could all fit into a 20' shipping container for transport and housing
        NABCEP certified Technical Sales Professional

        [URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]

        [URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)

        [URL="http://www.gaisma.com"]www.gaisma.com[/URL]

        Comment


        • #5
          Originally posted by Naptown View Post
          Seems that could be done easily at at least that location. Other locations may vary due to insolation
          And it could all fit into a 20' shipping container for transport and housing
          They will be fixed, not mobile and yes two different loads 48vdc and 24vdc. I'm not familiar enough with DC systems to calculate the battery needs for 36 hours of runtime, my assumption would be that the load runs directly off of the batteries and the panels feed a charger...? I also assume an inverter of some sort would be needed for the generator...? Exactly what I originally posted was the spec I was given, so I also assume the calculation they called 1000aH would actually be 192kWh at 4kW. This stuff is all new to me, but I am very interested in it, especially if the Feds are going to keep paying to provide them! Thank you guys for all of your help, and I am seriously looking for a partner that can turnkey this project for me, so if you know someone that can take this scope locate and develop a good system and install it, I'm all ears. Thanks again, Jay

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