diy solar

diy solar

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  1. T

    Quick panel configuration question

    They all have a little damage. Mostly the corner cell is cracked. The bad one has a "burn spot" on one cell more toward the middle. So yeah, it has some physical damage too besides just age.
  2. T

    Quick panel configuration question

    I can sort of answer these. I have one of those handheld panel tester meters. So that is how I am seeing the output wattage. I did not really look at the actual current of each, since it gives to the actual wattage. I did test them all separably (multiple times) laying next to each other. In...
  3. T

    Quick panel configuration question

    Would that not give the same results as 2S2P? The "bad" panel will still ultimately be in series with good ones, and thus limiting the string??
  4. T

    Quick panel configuration question

    I can do that, but before I go building more cables, I just wanted to know if there is any advantage to going with the 2S2P that "might" make up for any loss of "miss-matched" panels.
  5. T

    Quick panel configuration question

    This will be a small stand alone system that I won't be adding any more panels to. I have four 300 watt panels. Due to the voltage limits of my MPPT controller, my only options are 2S2P or 4P. These are old panels. One of them produces about 16% less (40w) than the other three. I assume...
  6. T

    Philips may have created the best LED bulb yet

    Manufactured demand? lol I do hold it when I am going to put it in. Aesthetics for those that have vintage fixtures. Not sure why that is so hard to understand. <shrug>
  7. T

    Philips may have created the best LED bulb yet

    No, he is not the only one. As noted, just because something is not important you you, does not mean it's not important to someone else. Not just regarding bulbs, but anything. I have zero interest in being off-grid, but I won't ask "who cares?" every time some posts about how they like being...
  8. T

    Swimming pool pump

    Are you saying you are trying to run that pump directly off of that one panel?
  9. T

    Just installed some EasyStarts on 5 ton AC

    Not just talking about immediate protection, a smaller generator will bog down and then may cause something to trip. I know mine grunts and lights dim when the compressor kicks in. If you say you can use a smaller generator with a hard start, why are people using a soft start specifically to...
  10. T

    Just installed some EasyStarts on 5 ton AC

    But how much time are we talking about? A few extra milliseconds? A HVAC by nature is self cooling so I’m not sure if a second of added heat will have any long term effects. However, as I said I don’t think there is enough long term data to day either way. A hard start for generator use...
  11. T

    Just installed some EasyStarts on 5 ton AC

    Why not go into detail if you think the concerns are valid? The main reason I will be getting one is to make it easier for my generator to start my AC during an outage. My generator will start my 4 ton unit, but gripes about it. Can’t be good for the generator or the compressor. However, I do...
  12. T

    Newbie here. 100w panel with portable power station. Will it work?

    That appears to be a panel with USB ports built onto it, not a stand-alone panel.
  13. T

    LiFePo4 charge problem after reassemble. Any help?

    Not sure about your wind generator, but you only have 1200W of solar for a 840Ah battery. Even your generator at 25A into the battery would take quite a while to fully charge it if it was fully discharged. As for why the solar charge controller is not supplying more than 2A, I don't know.
  14. T

    LiFePo4 charge problem after reassemble. Any help?

    Yes for the first No for the second. I really think the issue is that you never fully charged the battery. The difference between 40% and 99% is only about .6V I would just put it back on a charger and wait until you are at about 14.2V to 14.4V.
  15. T

    LiFePo4 charge problem after reassemble. Any help?

    Sounds like it was not charged to 100% if you were going by voltage change.
  16. T

    How to prevent backfeed?

    I backed less than 100 watts for maybe 15 minutes and got a call.
  17. T

    Anyone in the US still on the Starlink wait list?

    Just an update with my Starlink "experience". Note: I have the V2. My speeds had actually been getting better the last month or so. But then about 3 weeks ago, the dish was rebooting at about 9:00pm every few nights (and taking about 10 minutes to get back on line). Just the dish was...
  18. T

    Some zero export inverter questions

    The biggest issue I have is that my "idle" consumption can be as low as 300 watts. So for example when the HVAC turns off, I would need to ensure that whatever inverter I am using can throttle back fast enough. From the posts here, it seems that can be an issue with any non-export inverter...
  19. T

    Minor Backfeed Issue with Utility

    If they always assume this, then what's the issue? Point being a "true" grid-tie inverter won't/can't operate without the grid, but yet the electric company makes a big deal out having a "non-approved" one. And they don't seem to care about how many mechanical generators are sitting in your...
  20. T

    Minor Backfeed Issue with Utility

    I would bet the number of mechanical generators that are not using proper transfer switches outnumber the number of "dangerous" solar systems 1000:1
  21. T

    Updated JK-PB2A16S-20PH from v15.06 to v15.10 and lost heat function.

    Your first picture shows 0% remaining capacity. A factor?
  22. T

    Current limiting

    Can you elaborate on this? Why would you get a very large bill? Some sort of fine?
  23. T

    Free Power is AWESOME!!!

    That is why I asked. At 10kWh per day, I can't see how it can pay for it's self in 3 years. Even at $.25 per kWh that is only $912 per year. $20K - 30% tax credit = $14K = 15 years ROI. Something does not compute. Even at 30kWh per day, it's still 5 years. (@ $.25kWh).
  24. T

    Free Power is AWESOME!!!

    How did you calculate a 3 year ROI
  25. T

    Failing System Analysing

    Sounding more like your controller has issues if it needs to be rebooted so often.
  26. T

    Kepworth 12v 300Ah "mini" $550 (15.1x7.5x9.6 or 385x190x245mm)

    39 at night 75 during the day. Cloudy one day, clear the next.
  27. T

    Kepworth 12v 300Ah "mini" $550 (15.1x7.5x9.6 or 385x190x245mm)

    Hmmm.... I'm skeptical because the inverter will typically have a LVD higher than a depleted battery.
  28. T

    Failing System Analysing

    Given this, i would not worry too much about the cables or inverter. It's easy enough to remove/replace the breaker to eliminate that. Need to get some actual battery voltages to help figure out what is going on. Are you saying 70% charge or the actual inverter load?
  29. T

    Looking for a 12V 1500W~2000W Pure Sine Wave inverter under $300

    I have a couple of these brand in higher output and they have been great. They have been running 24/7 for many months. https://a.co/d/j0i5y0t
  30. T

    Multiple MPPT Solar Charge Controllers to the same battery bank

    Nobody ever said that it wouldn't. Once again, you have totally missed the point. <sigh> In any case, I'm done here. I feel confident most other people here are smart enough to understand the reasons that people overpanel.
  31. T

    Multiple MPPT Solar Charge Controllers to the same battery bank

    The problem is you have been trying to convince everyone that your way was the only way. Not everyone has a tilting array or wants to spend extra money on more batteries, or even another SCC. This whole "argument" started when you suggested someone underpanel a system, and I asked how that was...
  32. T

    Multiple MPPT Solar Charge Controllers to the same battery bank

    You asked where more than 3Kw was going to come from and I told you. Now you are agreeing it is there from overpaneling. Glad you finally understand. It only took 4 pages.
  33. T

    Multiple MPPT Solar Charge Controllers to the same battery bank

    If you have a 10Kw array, but have overpanneled to lets say 11Kw, on that cloudy day when 10Kw would have given you 3Kw, you will now get about 3.3Kw . How can you not understand that? And lets not talk just about cloudy days, People with fixed angle arrays may also overpanel for the winter...
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