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  • DIY 5.2kW Solar Tracker controlled by Raspberry Pi

    Hi Martin. I don't know how storm proof it is yet. I had some wind during the winter and it seems good. The concrete Foundation is 1 meter deep so it should be good. Denmark can be a lot windier so you might need more struts.The second row is about about 50cm higher that the front row of panels, it is a bit shade in the morning and evening but not much. Today the production of this sun tracking solar array was more than 50% more efficient than my fixed solar array. I have one 5,2kW fixed solar panel array and this one.There is a bit of shade at sunrise and sundown, but the power produced during the morning and evening is very low.I got 10kWh from the sun tracking 5,2kW array today and only 6kWh from the fixed 5,2kW array.I built this in august, so I'm not sure how much I will loose from...

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    Hi Martin. I don't know how storm proof it is yet. I had some wind during the winter and it seems good. The concrete Foundation is 1 meter deep so it should be good. Denmark can be a lot windier so you might need more struts.The second row is about about 50cm higher that the front row of panels, it is a bit shade in the morning and evening but not much. Today the production of this sun tracking solar array was more than 50% more efficient than my fixed solar array. I have one 5,2kW fixed solar panel array and this one.There is a bit of shade at sunrise and sundown, but the power produced during the morning and evening is very low.I got 10kWh from the sun tracking 5,2kW array today and only 6kWh from the fixed 5,2kW array.I built this in august, so I'm not sure how much I will loose from shadow in the summer. It seems like the atmosphere takes most of the sun during the shady hours.I need to see how it behaves in the summer before I can know for sure....

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  • DIY 5.2kW Solar Tracker controlled by Raspberry Pi

    Hi. Very interesting with a solar concentrator!My solar tracker will aim the panels in the general direction of the sun. It is not super accurate. A an error of a few degrees is hard to notice.I think that your solar concentrator might need more accuracy, so stepper motors will probably be best for you. 1. At the bottom of step 1 there is a .py file. (Under the photos). Can you check if you see that? Otherwise I need to email it to you. I do not have a premium account for myself.2. The motors starts every 10 minutes and moves for a certain time.3. The motor does not track how many turns the motor makes. I use speed/duration calculations. I did not use stepper motors since that would be much more expensive.4. I will add some photos of the linkage. I made it my self and used a steel sheet...

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    Hi. Very interesting with a solar concentrator!My solar tracker will aim the panels in the general direction of the sun. It is not super accurate. A an error of a few degrees is hard to notice.I think that your solar concentrator might need more accuracy, so stepper motors will probably be best for you. 1. At the bottom of step 1 there is a .py file. (Under the photos). Can you check if you see that? Otherwise I need to email it to you. I do not have a premium account for myself.2. The motors starts every 10 minutes and moves for a certain time.3. The motor does not track how many turns the motor makes. I use speed/duration calculations. I did not use stepper motors since that would be much more expensive.4. I will add some photos of the linkage. I made it my self and used a steel sheet and a threaded rod.5. I have a Vertex Velleman K8400 and it works great. It cost about 600 dollars and it is a kit that you need to put together yourself.Kind regards, Mats

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  • DIY 5.2kW Solar Tracker controlled by Raspberry Pi

    Here is a photo of the motors that control one of the rows. There is one linear motor for the side-to-side movement, and one motor for the angle movement.

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  • DIY 5.2kW Solar Tracker controlled by Raspberry Pi

    Hi. I have recieved my RTC now. I will connect it to my Raspberry PI as soon as I get some spare time. I bought a similar RTC based on the same chip, so the code should work for you as well as soon as I'm done with it.

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  • DIY 5.2kW Solar Tracker controlled by Raspberry Pi

    That is a great idea. I will buy a time module and upgrade my own system. Which module will you use? I can get the same kind and let you know when I am done with the code.

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  • 5.2kW Solar Tracker controlled by Raspberry Pi

    Hi. I have attached a file called Servo - for instructables.py to this instructable. That is all code for my prototype.The real system needs internet, I control the application from a website published on my rasperry pi.Let me know if my .py contains all you need. I used www.codeacademy.com to learn Python. It is free, online training.A problem with the raspberry pi is that you need to set the time everytime it is started unless you have internet access. Is that what you need your time module for?I let my raspberry pi go online to set it's Clock using NTP.

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  • MatsB76's instructable 5.2kW Solar Tracker controlled by Raspberry Pi's weekly stats: 8 months ago
    • 5.2kW Solar Tracker controlled by Raspberry Pi
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  • 5.2kW Solar Tracker controlled by Raspberry Pi

    Hi. It was a fun project!I used pysolar for the calculations. (Python version 3.5)Install pysolar by typing: sudo pip3.5 install pysolarHere is the code.#for pysolarfrom pysolar import solarimport datetimedef GetSunPosition(): longitude = 12.5350953 latitude = 59.6365662 elevation = 55 when = datetime.datetime.now() altitude_deg = solar.get_altitude(latitude, longitude, when) sun = solar.get_azimuth(latitude, longitude, when, elevation) if abs(sun) >= 180: sundirection = abs(sun)-180 #Works before noon else: sundirection = abs(sun) + 180 #Works after noon print(when) print(sun) print('angle', altitude_deg) print('bearing', sundirection) return sundirection

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  • 5.2kW Solar Tracker controlled by Raspberry Pi

    I have now attached the python code for my prototype to this instructable. Let me know if you have any further questions.

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  • 5.2kW Solar Tracker controlled by Raspberry Pi

    I use a rasperry pi, Parallax HB 25 motor drivers, RB-FRA-89 linear motors, a 12V to 5V/USB converter from an auto parts store (to power the rasperry pi with 12V).I don't have the pdf yet. I will add all instructions to this instructable, including the source code.

    Hi. I live in Sweden where the cost is about 10 Euro cents per kWh. Of the 9000 Euro, 35% is given back to me as a grant from the government. So my actual cost is 6000 Euro.I expect the solar farm to produce about 8000 kWh per year which will save me about 800 Euro per year.The electricity that I don't use myself is sold, and I get approximately 6 cents per kWh.The payback time is about 10 years with the government grant. 15 years if you build without grant.The expected Life time of the solar panels is 30 years (20 years warranty).This will not make me rich, but it was a fun Project, it's good for the Environment, and if I get som batteries in the future, I can use electricity even if the Power is out.

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