diy solar

diy solar

Recent content by Luk88

  1. L

    Do cheapest AIOs (EASUN SMH, Y&h etc) have global MPPT?

    I'll take it as its the only info I can get :) I asked EASUN directly, but I doubt they'll come back with an answer. I noticed certain slightly more expensive AIOs (SMX series) have "Advanced MPPT recovering 99% of PV power" in their description while my inverters lack this sentence, but they...
  2. L

    Do cheapest AIOs (EASUN SMH, Y&h etc) have global MPPT?

    I'm not saying the device is capable of 120A(I saw the wiring). I meant I beged to differ it is a translation error, not that it is capable of running at 120A. At the end of the day I don't know. Perhaps it is both a translation error and they don't know their arse from their elbow when it...
  3. L

    Do cheapest AIOs (EASUN SMH, Y&h etc) have global MPPT?

    If money was no object(and I knew about before I bought my current equipment) yes, I could... But they are a lot more expensive. Also I only recently found out the impact of not having global MPPT (after buying the current AIOs I have) so I'm trying to find out if I need to buy a new one...
  4. L

    Do cheapest AIOs (EASUN SMH, Y&h etc) have global MPPT?

    An unshaded string of panels produces a power voltage curve like this: All a "dumb MPPT" has to do is to travel the voltage curve right until the power starts dropping off and presto... It found the maximum power point. Now it can pull all the juice it needs. However a partially shaded string...
  5. L

    Do cheapest AIOs (EASUN SMH, Y&h etc) have global MPPT?

    Does anyone know if the cheapest (Voltronic Axpert MKS) clones by EASUN, Y&h etc have global MPPT? I'm talking about the SMH-ii series mostly, but if anyone has knowledge of other cheap AIOs that do please let me know. Sadly, manufacturer specs are worse than useless. They are often wrong. For...
  6. L

    What would you do?

    All 5 are fine These are 585W bifacial Jinko. Very similar in size to a sheet of plywood or osb. Currently I'm moving them with my wife's help. Before I gor them I thought, maybe I'll test this or that location... No way. They are getting installed and they will stay there.
  7. L

    What would you do?

    Exactly. It shows how strong 2mm of glass can be. He wasn't a big guy. Maybe 85kg,but still... I haven't unpacked all of them yet. The top one looks good though. I haven't heard any crunching. So if they didn't do more of that stuff in the depot I'm hoping it'll be fine. It's one of the...
  8. L

    What would you do?

    Imagine, you're getting solar panels delivered and...
  9. L

    Design for "ultimate" "fire-proof" 274kWh+ battery shed

    I can't link to a specific thread in question, but I thought it was a commonly accepted fact lifepo4 does not produce it's own oxygen at "self sustaining" temperatures. So all you need to do is to extinguish the electrolyte. At this point it becomes a normal liquid hydrocarbon fire. There is...
  10. L

    Multimeter and charge controller show different voltage

    You know the saying. A guy with a watch knows the time, a guy with two is never sure. Same is true about voltmeters. I have one quality HP "bench multimeter" I trust and I have various other portable multimetersshow errors of up to half a volt. If you're interested in getting a really good...
  11. L

    Design for "ultimate" "fire-proof" 274kWh+ battery shed

    I must have missed that. I'm not seeing any springs and were there any cell isolators? I may be mistaken on that too about that thread, but I vaguely remember the author saying "no fr4 isolators were not an accepted practice" when he was building his system. Still, it is only one data point with...
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    Design for "ultimate" "fire-proof" 274kWh+ battery shed

    I'm going to assume you're in Poland based on the nick. Please disregard this if not. If you're planning on putting this structure below the ground (as in it is not raised) the code is that battery banks have to be installed raised 30cm off the floor. Don't ask me why 30 and not 32. I guess...
  13. L

    Is it possible to protect your Solar System against EMP?

    With a very expensive meter. At the time I hired two young guys who were learning to be electricians at a local technical school to do the wiring in my workshop. Initially it was just to do the wiring. I was going to do everything else myself. And I was going to hire someone to do grounding...
  14. L

    Is it possible to protect your Solar System against EMP?

    I read a military EMP prep manual once long time ago. It was full of things like "cast steel enclosures for critical equipment need to have at least 12mm (half inch) wall thickness and be equipped with lead seals". I'm not sure what this tells us about the suitability of your typical mesh...
  15. L

    20 degree roof, panels and snow.

    Sadly I haven't got any unshaded south-north facing fencing unless I want to put fencing in a middle... I've spent quite a bit recently buying bifacial panels for a "typical" ground mounted array so if there are more panels they will be cheap second hand ones (or the cheapest new ones). Half...
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