diy solar

diy solar

Recent content by JayArr

  1. J

    Upgrade RV factory installed system

    Don't assume that Solar is the best way to go. It's installed on the trailer so they can sell you the upgrade, not because it's particularly useful. It's much easier to sell you "additional" panels if there is already one there than it is to talk you into installing solar that doesn't yet exist...
  2. J

    Does anyone on here repair faulty inverter boards - shorted fets on Sunny Island

    I repair inverters for a living and I would say that's repairable but the key is whether the signals are OK. When we repair this kind of board we remove all of the FETs and then check all of the gates for proper signal. Use a Scope and make sure there is no DC component. If it's all OK then map...
  3. J

    Question about DC to DC charging

    It wouldn't matter if everything was 100% efficient but since it's not this arrangement will eventually drain your batteries
  4. J

    Easement removal?

    Read what the easement actually says. Mine says something along the lines of "I will not build a permanent structure on, over or under the easment a structure that may interfere with or endanger the distribution line". If that's what yours says then you can build anywhere because there are no...
  5. J

    EG4 18K - Air Conditioning won’t run without grid

    Do you know what Power Factor is? Maybe your unit is recognizing bad power factor as the compressor starts and it's refusing to run. Wattage is based on a power factor of 1. As soon as you power a heavy motor like a compressor the power factor goes off and you start to draw inductive power...
  6. J

    Modified Sine Inverter Uses

    You see, this is what I'm trying to dispel. What if it was built on a Monday and something wasn't right? What if it had a defective leaky transistor that kept blowing your coffee maker but could have been fixed? You've blamed the MSW technology for what could very easily have been a one-off...
  7. J

    Modified Sine Inverter Uses

    I've still got a Sunbeam toaster on my kitchen counter. Anyone born before 1980 may remember these, no levers you just dropped bread into the slots and they slowley lowered themselves down and when toasted they slowly rose back up for you. Incredible design based on the fact that the tungsten...
  8. J

    Modified Sine Inverter Uses

    It's also possible that the MSW inverters that have given people problems were cheap Chinese trash and now all MSW inverters are getting tarred with the same brush. The trouble may not be the MSW it may be the cheap Chinese design and manufacturing. I owned a brown Ford Pinto hatchback once...
  9. J

    What was your most interesting recent non solar project?

    In the last year I, with the help of youtube and some manuals, taught myself how to rebuild automatic transmissions. One of the only things on a car I hadn't done, I've rebuilt engines, brakes, steering etc. I started with the GM 4L60E transmission which is common as all get out. Used in all...
  10. J

    Three AC units in one house - How to stop them from turning on all at once

    Yes. In actual life the chances of two of them starting at the very same instant are ridiculously long odds. Even so, if they have soft start caps it shouldn't be a problem. I don't know where this idea that the compressors continue to run came from. I've been servicing my own AC systems for...
  11. J

    Three AC units in one house - How to stop them from turning on all at once

    Look at the diagram again. Two can run at the same time. If any two are running the third will not start. If two are running and third calls for action nothing happens until one of the others stops. Eg, If the livingroom and the kitchen are both running and the bedroom gets warm the bedroom...
  12. J

    Three AC units in one house - How to stop them from turning on all at once

    Just use relays on the signal lines from the thermostats to the compressors. You will need Qty:3, three pole, double throw relays. Each relay will require at least one other relay to be off before it can close and start it's respective compressor. If 2 and 3 are on 1 can't start. If 1 and 3...
  13. J

    Modified Sine Inverter Uses

    My mind goes to my trailer and it's gas appliances... Ammonia refrigerators - think RVs - nothing but a small pilot flame and a mechanical thermostat. Hot water tanks - flame and mechanical thermostat. Gas stove.
  14. J

    Modified Sine Inverter Uses

    That's an important fact. Modern electronics power supplies use a three stage process to make the low voltage DC required by the TV/computer. The first stage is just a bridge rectifier. In order to save money all power supplies are now built to work anywhere in the world so this first input...
  15. J

    Co-worker says Im wrong. Maybe you can tell me if I'm crazy.....

    Consider also that the amount you earn per hour is nowhere near the amount of money the company has to pay to keep you employed. An employee paid $40 per hour could easily be costing the company $80-$100/hour. With that in mind do as the boss says, if you waste several hours hauling batteries...
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