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  1. J_Mack58

    Anyone have experience with...

    Doc, I looked up that EVE 280 Ah cell and it said it was a M4 screw. So are you going to drill out for a M5 Helicoil? Amazon has this kit: https://www.amazon.com/Helicoil-5546-5-Metric-Coarse-Thread/dp/B000BB8XLG Good luck man, you have to fix it, if you don't you will be tried and found...
  2. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    I total get it now. At my day job we communicate with hundreds of sensors using our 475 HART Communicator. “HART” is an acronym for Highway Addressable Remote Transducer. The HART Protocol makes uses Frequency Shift Keying (FSK) standard to superimpose digital communication signals at a low...
  3. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    Yes Korishan, they transmit on the DC line some FSK signal.. This reference design interfaces an AFE031 Powerline Communications Analog Front End with a C2000™ MCU to send and receive data over a wired coupled interface using frequency shift keying (FSK). The design demonstrates the SunSpec®...
  4. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    What I have learned from a long boring APsmart video is the receiver operates on voltages from 7.7 volts up. They call the the signal from the transmitter to the receiver the "Keep Alive" Signal. The device switching mechanism be it contacts or solid state can switch 550 watts what ever your...
  5. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    Here is one brand https://voltaico.com/product/tigo-energy-ts4-a-2f-rapid-shutdown-for-two-pv-panels/?utm_source=Google%20Shopping&utm_campaign=All%20Products%20Google%20Merchant%20&utm_medium=cpc&utm_term=16363&gclid=EAIaIQobChMIn5mOl5_79wIVbcLCBB1IkQ9NEAYYBSABEgJgd_D_BwE
  6. J_Mack58

    Anyone have experience with...

    We have used something call a Helicoil when this happens to use on stripped out aluminum...
  7. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    No extra wires to run, just plug the device in parallel with your solar panel. To close the relay they must be using the DC from the solar panel. I'm gonna search some youtube videos to get the fine details. If my theory is right then at night the array will be all disconnected as the sun come...
  8. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    Meanwhile I'm letting the solar panels pay "up front" for the extra safety devices for firefighters.
  9. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    The way they want the code satisfied is, a transmitter transmits on the DC line of your Solar array (negative or positive line it does not make a difference) a signal to receivers on ever solar panel that control a relay that close when the transmitter is on. This transmitter is ran off your...
  10. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    Stainless Steel model and on the roof was old code.
  11. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    Tough code they want the power off within 1 foot of the Solar Panels. I drove around the neighborhood and I see shiny stainless steel disconnects with big red handles. And now they said those are from 2014 Code and we can't do it now. Power must be off before the firefighter hit the roof.
  12. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    You made sense cak, if I was a firefighter here is some common sense I would use. I’m not cutting through any metal pipe running across anybody roof with an axe be it electrical, water or gas. I guess I‘m too real world as I do things and not engineer concept things. So if I put 10 solar panels...
  13. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    Ha! I wish I was getting that model actually the 14 I have to get are: APSYSTEMS, RSD-D-15, PV MODULE RAPID SHUTDOWN COMPLIANCE SOLUTIONS Model: RSD-D-15 Manufactured by: APSystems Condition: New Estimated Delivery: May 13th - May 19th In Stock Price: $56.91
  14. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    I researched the solution to comply with NEC 690.12 It will cost me $50 per panel plus $60 for a transmitter. I have to do this on my 14 Panel system. There is a box with a contactor that you plug your MC-4 plugs into . There is a transmitter that runs on ac that has like a current transformer...
  15. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    You good OGITC, I think this only applies to new installs. The city not going to drive around looking this roof-top solar violation. There is no money in it for them, only the manufacturers of the so call "Rapid Shutdown Devices". But then again if these manufactures line the city pockets with...
  16. J_Mack58

    NEC 690.12 (A-D) Rapid Shut Down of PV Systems on Buildings.

    https://www.mayfield.energy/blog/nec-2020-rapid-shutdown-requirements I get it, we don't want to hurt our Firefighters trying to put out a fire on our house that have solar panels but I looked at some commercial devices and their price and I said "here we go again". And to make matters worst...
  17. J_Mack58

    Way to go Florida!!!

    Man! Utility Companies have all the lame excuses, the backfeeding into the grid issue has been addressed and still continues to be address way back when the Grid-tie inverter was being developed.
  18. J_Mack58

    Way to go Florida!!!

    Good article. Often we view Republicans are for big business but Gov. Ron DeSantis used his head and decided on what was right. Here is my theory, if 3/4 of a state have solar then the Power company would make less money, Period. But they would burn less fossil fuel, so their fuel bill will go...
  19. J_Mack58

    Way to go Florida!!!

    Hoping California follows. https://pv-magazine-usa.com/2022/04/28/anti-rooftop-solar-bill-vetoed-an-industry-reacts/
  20. J_Mack58

    What to know for this battery build ?

    Roger, all the cells you have has a milliamp-hour (mAh) capacity rating. From my limited cell experience the lowest I have dealt with is 1500 mAh cell. So all the same that cell will output 1.5 amps for 1 hour at the nominal voltage of 3.6 volts. Find what your cells mAh capacity is. Here on...
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