diy solar

diy solar

Search results

  1. S

    recommendation for ve direct usb alternative that is ISOLATED?

    Theres plenty of them 10 usb tll thingys but they backfeed voltage in some cases so what I need is something that isolates the usb thingy the same way victron's ve direct usb does but without the ridicolous 50 usd price :X
  2. S

    Pzem-025 shunt with display. Surprisingly capable

    Had this shunt to measure incoming power and voltage on my PV line for a year. Works great. Recently i reconfigured my solar array so it now have almost 400v oc and 340v during mpp. The shunt is rated for only 300v but i just found out it can only display 300v max everything else works fine up...
  3. S

    Daly bms and Solar assistant

    use emulated bms in solar assistant instead. Solar assistant uses bms to get state of charge data only (i think) and daly bms cant measure soc. It can maybe guess soc but im willing to bet it just uses a random number generator to display soc.
  4. S

    Why do powmr sell their units so cheap now?

    Should always turn on and turn off in right order, more so with cheap Chinese stuff. Off 1 AC out breaker 2 PV in breaker 3 Inverter (if it have on off switch) 4 battery breaker Turn on in reverse order.
  5. S

    Trying to learn some fundamentals of electricity with help of AI.. big mistake

    I always though that chat gpt and similar ai's where dumb AF when it came to basic human communication that even a toddler would be more apt at. But to ask some basic electrical question and be given 3 different answerer/self corrections is just.. wow. Im not doing anything with my system im not...
  6. S

    Best way to handle excess solar production

    cheapest would be to dump excess energy into a large hot water tank for later use. Most economic (but upfront expensive) is to refuel hydrogen cells for winter season usage. Dumbest is to sell it to the grid because: When are you able to sell to the grid? When sun is shining When is power cheap...
  7. S

    Partial shading on panels put in series doesn't seem to be any issue at all

    lol love it great video. Heres a "tldr" kinda screenshot:
  8. S

    V2.29 firmware for POW-HPM5.6KW (and maybe others) 2.29

    This firmware is compiled 19 June 2023 and got it from powmr support for my unit POW-HPM5.6KW. No idea if it may work with other powmr units or other srne clones.
  9. S

    Partial shading on panels put in series doesn't seem to be any issue at all

    "Normal panels" Half cut percs 34v 10A at Pmax. 2 strings in parallel. Each string in series of 9 . No additional hardware it goes directly into my AiO inverter (via dc breaker ofc) https://static.trinasolar.com/sites/default/files/EU_TSM_DE06H%28II%29_datasheet_A_2019_Web.pdf and similar...
  10. S

    Partial shading on panels put in series doesn't seem to be any issue at all

    I dont know if i maybe have some super good low light performing panels but partial shading does not bring down the entire array in a way that seem to be the general consensus . In worst case scenario covering one panel with a blanket and it would at least be able to pass on the current from the...
  11. S

    Dc breaker with resistor?

    I tried it anyway...
  12. S

    Dc breaker with resistor?

    See crude diagram :> Breaking procedure 1 then 2 then lastly 3 where resistor is disconnected last.
  13. S

    Dc breaker with resistor?

    It would be easy to test this. Worst (best?) case scenario to produce an disconnect arc would be to put your solar array into direct short circuit during full sun. Pv pos and neg connected directly to each other and then opened. Basically max amp 0 voltage closed circuit. Opening this curcuit...
  14. S

    Anyone got solar assistant to work with POW-HPM5.6KW?

    Mailed solar assistant asking but they wont reply, I have a strong feeling if I would buy the software and find out it wont work I wont get a refund.
  15. S

    any dc meter that can display up to 500v and over 20A?

    I think I worded my question a bit wrong. The type of unit Im looking for has a real robust shunt able to handle 100A. The one I got right now Can measure 300V and got an 100A shunt. The capacitors is even able to handle the 320 open circuit voltage of my solar array but wont display above 300V.
  16. S

    any dc meter that can display up to 500v and over 20A?

    Cant find anyone higher than peacefairs 300v model. Any tips?
  17. S

    Ability to over panel, who can walk the walk and who is only talk?

    Epever used to state they can be over paneled by 150%, lowered later on to 125%. What is happening is when they fail because over paneling is during cloudy weather and the ssc is accepting max current and suddenly sun pops out from clouds mosfets burn up because the ssc is unable to react fast...
  18. S

    Question about Daly Smart BMS 500A s4p4 12V « nominal capacity »

    Even if daly bms could calculate soc properly that would be dumb.
  19. S

    PowMr, Sunsmart SP5K, firmware

    do you have any change log?
  20. S

    PowMr, Sunsmart SP5K, firmware

    tried the support chat on powmr.com?
  21. S

    SRNE pc monitoring unable to change voltage settings?

    Other values like current limits and mains/pv charging priorities I can change without password. Same for you? Not at home cant test this yet
  22. S

    SRNE pc monitoring unable to change voltage settings?

    In my app the "read" voltage values are correct but divided by 4. So a setting of 54v float voltage in the unit is displayed as 13.5v float voltage in the application. Am also unable to change the value in the app even when battery type is set to user and lf16. Anyone know if im doing...
  23. S

    Why do powmr sell their units so cheap now?

    If you have 48v battery you can connect 500v solarpanels directly to it, the panels dont magically make the batteries 500 volt. There will be a little spark and the batteries will draw max current and naturally bring the terminal voltage down to 48v then slowly rise at max panel current up to X...
  24. S

    what is temperature "TR" in an AIO?

    top right corner after dc and ac temperature
  25. S

    Why do powmr sell their units so cheap now?

    I'd say the powmr units built by SRNE are of good quality. I heard that their first 60a ssc's was total garbage.
  26. S

    Panel angle formula?

    You take a beer bottle and place in on the panel at 12.00. Angle is perfect if you see no shadow.
  27. S

    Dc breaker with resistor?

    In dc connectors with large inrush current you can add a resistor that make connection before the conductor to prevent the spark. There does not seem to be a similar thing for dc breaker and for a good reason I assume. But what is that reason? A dc breaker that breaks dc line first while still...
  28. S

    Latest, good All-In-One - mobile, EG4, SunGold, Growatt, Chins - single phase, 3kw

    What are the idle powerdraw of those aios? The srne (powmr rebadge) i got have 50w idle and 30watt in power saving with inverter sleeping but ready to go
  29. S

    how does boost float recharge works on SRNE?

    does it need balancing if no single cell go above 3.53v with a current of 0.01c ? ;)
  30. S

    how does boost float recharge works on SRNE?

    A setting of 3.525 voltage per cell as boost for 10 minutes and 3.25volt as rebulk/reboost seem like a good set and forget value? My JKbms is set to balance cells who get past 3.53v. @Mattb4
  31. S

    how does boost float recharge works on SRNE?

    is the timer seconds or minutes? It says Minutes but those 10 minutes was over in 10 seconds lol. And the max value 900 seem dumb if it was minutes... that is 15 hours. Gonna try the value 600 see if if behaves better
  32. S

    how does boost float recharge works on SRNE?

    I got settings set at 56.4v boost for 10 minutes 54v float and 43.6v on setting #37 Battery fullycharged recoverypoint. What my inverter does is it charges up to 56.4 then instantly stops charging battery and all load is via pv only. A small discharge of 35w is drawn of batteries. After 10...
Back
Top