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Small system to power freezer and refridgerator

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  • #16
    Shucks if you are left in earth to see the end, you missed the bus and earned your place. Happy fighting and welcome to He!!
    MSEE, PE

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    • #17
      The OP wanted details for a SMALL BACK UP SYSTEM, for refigeration which is not normally small and back up indicates for when the power is down for a short while,

      As it turns out the OP wants a stand alone system for when there is no mains power at all,

      So all the Hu Ha has started because the OP did not state what they really wanted to achieve,

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      • #18
        Not worth the electricity to debate as things will get bad before the end of the world as you put it. You must live in the city, At what store are you going to be waiting in line to get your food, as mine will be fresh and in my freezer!!!!!!!!!!!!!

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        • #19
          Enough
          Either we discuss what the Op has asked for help on or I close the thread.
          It is not our place to interject our values on others.
          It doesn't matter what the OP's motives are, they are his and he or she will make the value judgement. It is not up to us!
          So that being said what does anyone have to say that might be constructive in helping the OP to design a system.
          Oh here's a thought
          Ken
          To accurately determine loads get a Kill a watt and plug the items you wish to run for a few days to determine how many watt hours a day each uses. Remember that a refrigerator or freezer will use more during the warmer months but we are really looking at the winter months to determine the usage. After a few days divide the use on the meter by the number of days it ran to get daily usage.
          Once we have that information it will be easy to size a system that is appropriate for the intended use.
          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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          • #20
            Originally posted by ken1645 View Post
            You must live in the city, At what store are you going to be waiting in line to get your food, as mine will be fresh and in my freezer!!!!!!!!!!!!!
            Nah we will see your lights on and just take everything you have. You do not have enough bullets or guns to stop thousands aiming for you.
            MSEE, PE

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            • #21
              Thanks Rich, I have the fridge and freezer in my garage that's not insulated and I think that will help keep them from running as much in the winter when sunlight is less to charge batteries, if that is a misconception please let me know, sorry some people have to be smart a__, just looking for some valuable information. People should read Thomas Jefferson a very smart man who had a lot of knowledge for his time.

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              • #22
                Originally posted by ken1645 View Post
                Thanks Rich, I have the fridge and freezer in my garage that's not insulated and I think that will help keep them from running as much in the winter when sunlight is less to charge batteries, if that is a misconception please let me know, sorry some people have to be smart a__, just looking for some valuable information. People should read Thomas Jefferson a very smart man who had a lot of knowledge for his time.
                Actually that might be helpful information. I still spending the $20 or so on the meter to get an accurate energy use profile on the units.
                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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                • #23
                  thanks, where would you suggest where to get one, called radio shack and they said they didn't

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                  • #24
                    I have the fridge and freezer in my garage that's not insulated and I think that will help keep them from running as much in the winter when sunlight is less to charge batteries, if that is a misconception please let me know
                    I have no idea what the climate is where you live,

                    Thinks about your summers and night time temps, if you have sunny summer days and cool nights that good, if you hot summer nights that is a factor, the refridge works harder as its hotter and generally opened more for cool drinks etc,
                    daytime for me is not the factor, its nights, as the refridge still uses power but none comes in.

                    So in short, consider the power consumption but your usage patterns and climate as well.

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                    • #25
                      Originally posted by ken1645 View Post
                      thanks, where would you suggest where to get one, called radio shack and they said they didn't
                      Check with our sponsor Solartown.
                      If not home Depot has them online I don't know about in the store.
                      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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                      • #26
                        thanks Rich i will search. i live in Jacksonville Arkansas have a nice south facing location for ground mounting will build mounting bracket to be adjustable, we are upper middle age so opening fridge will be kept to a minimum, also can someone tell me if the freezer is kept closed and no electricity thru the night until power from panels kick it on would hurt the freezer?

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                        • #27
                          Originally posted by ken1645 View Post
                          thanks Rich i will search. i live in Jacksonville Arkansas have a nice south facing location for ground mounting will build mounting bracket to be adjustable, we are upper middle age so opening fridge will be kept to a minimum, also can someone tell me if the freezer is kept closed and no electricity thru the night until power from panels kick it on would hurt the freezer?
                          If it's 100 degrees out it probably would not be a good thing for much longer than that. Chest type freezers are generally better than the upright ones.
                          You could always add some additional insulation on the exterior.(I'm thinking 2" Polyisocyanurate foil faced, foil out)
                          There have been others who have taken chest freezers and converted them to refrigerators with very low power consumption by adding a secondary thermostat. these are not convenient but use much less battery than the conventional refrig/ freezer.
                          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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                          • #28
                            Originally posted by ken1645 View Post
                            thanks, where would you suggest where to get one, called radio shack and they said they didn't
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                            • #29
                              It is a kenmore 5 cubic ft chest freezer and 18 cubic ft energy star fridge

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                              • #30
                                You could always add some additional insulation on the exterior.(I'm thinking 2" Polyisocyanurate foil faced, foil out)
                                All the chest freezer i have seen do not have any specific way to dissipate heat, My chest freezer dissipates heat from the cabinet walls so this would not work,

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