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  • nipsip
    Junior Member
    • Nov 2011
    • 6

    #1

    Cost Per Watt for Ground Mount Installation

    Wondering what a competitive price would be for the labor for an install (site prep and finish work will be done by existing contractor) which would include 3 DPW pole mounts for a 10kW system consisting of 30 E19 320 Sunpower panels and 3 Sunpower 3kW inverters.
  • Naptown
    Solar Fanatic
    • Feb 2011
    • 6880

    #2
    too many open ends in the information to even begin
    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

    • nipsip
      Junior Member
      • Nov 2011
      • 6

      #3
      Originally posted by Naptown
      too many open ends in the information to even begin
      Pretty simple question. No equipment or permits - just labor cost.

      I can tell you the labor cost in building a 2400 sq. ft. house but it's too complicated for you to estimate the install of a 10kW system where the site prep, ie. grading, excavating, concrete work, trenching, and finish grading will be done by a different contractor.

      Must be rocket science then.

      Comment

      • russ
        Solar Fanatic
        • Jul 2009
        • 10360

        #4
        Originally posted by nipsip
        Pretty simple question. No equipment or permits - just labor cost.
        OK great - what will labor cost me to build a 2400 ft2 house adjacent to my own home?

        Rock? wind loads? local code? site level and accessible? Type of inverters to be used? Layout and distances? Many items need be known, for even Rich who knows that part of the business quite well; to make a SWAG.
        [SIGPIC][/SIGPIC]

        Comment

        • nipsip
          Junior Member
          • Nov 2011
          • 6

          #5
          Originally posted by russ
          OK great - what will labor cost me to build a 2400 ft2 house adjacent to my own home?

          Rock? wind loads? local code? site level and accessible? Type of inverters to be used? Layout and distances? Many items need be known, for even Rich who knows that part of the business quite well; to make a SWAG.
          Installed in open level field. 90mph wind load. No local code problems.

          All site prep work and setting the poles will be done by another contractor as well as any grading finish work, gravel, etc., so you don't have to worry about level, it will be level and the posts will be in the sonotubes in concrete as directed by PV installer.

          Three poles, 10 panels on each pole, three inverters. Inverters and panels are from Sunpower. Distance from the array to the house 150' - all trenching and fill will be done by another contractor.

          Comment

          • Naptown
            Solar Fanatic
            • Feb 2011
            • 6880

            #6
            Two days to set the racks on the poles install the modules and hang the inverters that's a 2 man crew. Once the poles are set it goes pretty quickly. You do realize that DPW recommends an 8" schedule 80 pipe in a 3' diameter x 6' deep hole. It is best to not use sonotube for the whole thing just form up around the top, hang and plumb your pipe and pour around it.

            Now how much that will cost is anyone's guess. Since you don't give a location the range is huge Socal will be higher than in the Sudan We have no idea what labor costs are in your area.
            Therefore you will get the usual and customary answer to pricing questions Tree fiddy is what it will cost.
            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

            • nipsip
              Junior Member
              • Nov 2011
              • 6

              #7
              Originally posted by Naptown
              Two days to set the racks on the poles install the modules and hang the inverters that's a 2 man crew. Once the poles are set it goes pretty quickly. You do realize that DPW recommends an 8" schedule 80 pipe in a 3' diameter x 6' deep hole. It is best to not use sonotube for the whole thing just form up around the top, hang and plumb your pipe and pour around it.

              Now how much that will cost is anyone's guess. Since you don't give a location the range is huge Socal will be higher than in the Sudan We have no idea what labor costs are in your area.
              Therefore you will get the usual and customary answer to pricing questions Tree fiddy is what it will cost.
              Located in MA. Maybe instead of cost I should have asked for man days. Installers and electrician. How about that.

              Comment

              • Mike90250
                Moderator
                • May 2009
                • 16020

                #8
                1 day to set up and auger the hole, lay rebar, drop pole.
                1 week to wait for inspection.
                1 day to shore up pipe (pole) dump 3 yards of concrete (takes a lot to fill in the hole) and insure it sets straight.
                4 days damp cure
                .25 day to install top piece

                Depending on the size of array & panels to be installed and wired, and condouit installed for the wires, 1 - 2 days.
                Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
                || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
                || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

                solar: http://tinyurl.com/LMR-Solar
                gen: http://tinyurl.com/LMR-Lister

                Comment

                • Naptown
                  Solar Fanatic
                  • Feb 2011
                  • 6880

                  #9
                  Originally posted by nipsip
                  Located in MA. Maybe instead of cost I should have asked for man days. Installers and electrician. How about that.
                  did you by any chance read what I wrote? Add a day for an electrician and helper to wire it in.
                  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

                  • kingofseo
                    Banned
                    • Nov 2011
                    • 4

                    #10
                    there is way to many factors to make a acurate guess


                    Note - CLICKBANK spam links will get you banned, stop it now Mod.
                    Last edited by Mike90250; 11-14-2011, 11:31 PM.

                    Comment

                    • vinniethePVtech
                      Solar Fanatic
                      • Sep 2011
                      • 219

                      #11
                      about $.90 per watt for ground mount. $.78 per watt for roof mount. That's for labor only. Residential non commercial rate.
                      About $9000.00 in 5.5days tops with an electrician and apprentice.

                      Comment

                      • TnAndy
                        Solar Fanatic
                        • Oct 2011
                        • 176

                        #12
                        Originally posted by nipsip
                        and the posts will be in the sonotubes in concrete as directed by PV installer.

                        Has nothing to do with your question, but I'm curious what size sonotubes you'll be using and how much concrete ? I'd think for a 10 panel array, it would take quite a bit. I did a 5' cube for mine and wondered if it was enough.

                        Comment

                        • solarsolar
                          Junior Member
                          • Dec 2011
                          • 6

                          #13
                          For ground mounted small PV systems I see at the moment quotes for about $4.50/Wp total installed cost, about $1/Wp of this is for labor. But that is only budgetary number, without any details known of your specific project.

                          Comment

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