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Wits_End DIY Solar Install

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    #46
    Missed the request for an update, new TBH notifications just don't catch my attention anymore.


    This is the login screen of the solar generator tonight. I am a data guy and I can tell you the calcs they use for this are a bit wonky and vary slightly depending on how you look at it. As you see below the data shows Jan/Feb were dead which is not true in reality or when I download the hourly data. Either way, the total energy generated is fairly close to what I have been tracking, good enough for me.

    Click image for larger version

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    This is what I update occasionally and use to track energy generated. Notice anything? Highlighted cell is a hint.

    Click image for larger version

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    At the start of this thread I suggested I wanted to extend the carport for parking and give me room to add 9 more panels. Project complete.
    For the three sections of solar panels (3 x 7 = 21 total panels) I added 3 additional solar panels ( Final setup is 3 x 10 = 30 total panels). This maximizes the capability of the inverter I bought, which means in the summer I hit peak power generation earlier in the day and stay at peak power through most of the day. Since the panels are generating more than peak I somewhat waste that energy, but I am maximizing my system. With the 9 additional panels I was generating so much power I was tripping the breaker again, but this time due to overcurrent and not a bad breaker. I upped the breaker to 40A and ran new wire from the panel to the outside switch and then to the inverter. It was easy enough. Between 8AWG wire, new breaker, steel for the carport, r-panel, steel for solar panel frame, and the extra panels, I spent another $2500. Don't double check my math, but somewhere around $9200 all-in, before Fed tax credit. Roughly $6500 total after tax credit.


    Total energy generated to date is above: 28,645 kwH
    Total energy cost saved to date: approx $3,700
    Approx 2.5yrs so far, 6 months with all 30 panels

    So, I added the extra panels knowing they would impact my ROI a bit, but long term they would generate more power and more money back. I expect total ROI in about 4-4.5 years from the start.


    No issues with inverter or panels so far. A good amount of people would say the few $K isn't worth the time, and are probably right. All in all, I would do again, but I enjoyed the design, installation, and general challenge of the project. And I can tell anyone thinking of chasing panels from some solar installation company that is going to charge tens of thousands of dollars for the install, that they are absolutely crazy.

    Panels did make it through a hail storm with >golf ball size hail. Destroyed a car windshield and severely dented the hood. Some spots on the panels, but no noticeable drop in performance.

    Wits_End
    Last edited by Wits_End; 01-09-2025, 06:50 AM.

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      #47
      Good stuff and appreciate the follow up. I wonder if a hybrid invertor would be best instead of a grid tie only version given batteries are getting better and cheaper (even if you want to start with a grid tie system only).

      Impressed on the hail storm resilience!

      Comment


        #48
        Originally posted by TeamAmerica View Post
        Good stuff and appreciate the follow up. I wonder if a hybrid invertor would be best instead of a grid tie only version given batteries are getting better and cheaper (even if you want to start with a grid tie system only).

        Impressed on the hail storm resilience!

        I use more energy than the system can generate in a day, therefore I would never store anything in the batteries. I somewhat use the grid as a battery; reverse the meter during the day and pull from the grid at night. A remote cabin setup or something like that would make batteries very beneficial. If I lose power I switch to a stable high power generator. The batteries would help in that case, but that rarely happens.

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          #49
          $3700 is more than my E-bill in a year. But I'm also single. And conservative as possible. LEDs, unplugged most unused appliances, Only run AC when home during the warm months, NG gas heat for cooking and heating, ext. But this is very appealing, as if I ever get to move outside the city limits.........

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