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Richard Mackay

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Richard Mackay last won the day on October 10 2020

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  • Gender
    Male
  • Location
    Johannesburg
  • Interests
    DC microgrids
    Hands on electronics

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  1.    Richard Mackay reacted to a post in a topic: Shadow effect on PV
  2.    anunnaki reacted to a post in a topic: Complete Noob Checking In
  3.    igg reacted to a post in a topic: Solar panel fault finding help
  4.    Richard Mackay reacted to a post in a topic: Solar panel fault finding help
  5. Richard Mackay
    Take the suspect panels down and set them up on the ground. Measure the volts of each panel..
  6.    Kilowatt Power reacted to a post in a topic: Can 15kW Axpert Inverters Start 9.3kW Submersible Pump?
  7.    Richard Mackay reacted to a post in a topic: A Different Method - Solar Powered 220v Hot Water Geyser
  8. Richard Mackay

    Andre

    Richard Mackay replied to AndreTb's topic in Solar Power

    Do you mean a charge controller when you refer to 'PWM'??
  9. Richard Mackay
    Agreed with water heating via solar bring the best option. As far as the cost of water heating of gas vs grid my understanding is they cost the same. But gas cooking has lots going for it. Battery storage for cooking can't compete presently.
  10.    Richard Mackay reacted to a post in a topic: Earthing of solar panels. Earth cable in same conduit as pv cables?
  11. Richard Mackay
    Isn't everything on Facebook suspect??
  12.    Richard Mackay reacted to a post in a topic: Panels in parallel - can I add a slightly different wattage panel (410W vs 405W JA Solar)
  13. Richard Mackay
  14.    YellowTapemeasure reacted to an answer to a question: Lengthening underground HT and 230V leads
  15. Richard Mackay
    What power (current) are you needing to feed?
  16. Richard Mackay
    Use a laptop PC
  17.    Durbanguy reacted to a post in a topic: Solar cable roof entry on a corrugated roof.
  18. Richard Mackay
    Have a look at this discussion:
  19. Richard Mackay
    Phone them..
  20. Richard Mackay
    What are you needing backup power for? Are these devices located in the same area?
  21. Richard Mackay
    I presume you are not feeding into the grid?
  22. Richard Mackay
    The argument I have heard is that the grid is cheaper than using batteries.
  23. Richard Mackay
    What information is available from your inverter? (a list of them provided by the manufacturer would be appreciated!) And how do you read this data (wiring, plugs etc.)
  24. Richard Mackay
    This is my pet subject: the scheduling of RE power. It's not easy to do with intelligent control (i.e by determining the available power and deploying it appropriately) It appears that with inverters that don't have a non essential output it's difficult to determine what the available power is. This puzzles me!
  25. Richard Mackay
    The non essential load supply will switch on when power is available. If you have a lot of PV panels then it can deliver a lot of power. So no need to reduce the size of your element before you see how much power is available. Those without a non essential output reduce their geyser element size so it won't overload the inverter if other loads are also on.
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