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    Deye 5k Hybrid zero export to ct issue

    I am sure this is not how to use Twisted Pair cables. You should use only 1 pair, and use Pure Copper (not Copper Coated Aluminum) as it needs to conduct as much as 1A. Better result is to use Shielded Twisted Pair: each pair is shielded Best result is to use Double Shielded Twisted Pair...
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    re 3Phase Electrical System: Y and High Leg together

    I visited my brother in law in the big city (Manila); he lives in a mix Industrial, Commercial and Residential neighborhood were 3Phase Y or Delta (3 Transformers) coexists with 3Phase High Leg (2 Transformers). I traced the posts and wires and both groups of transformers share the same High...
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    What BMS uses inductive balancing?

    Me too. And not just Balancers, but also the BMS. Inverters are getting higher and higher power, HV batteries (>90v) are gaining traction.
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    High voltage BMS suggestion

    That is prohibitively expensive! Almost at cost of commercial HV battery packs!
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    JK B5A25S60P BMS

    On your photo, are you trying to make a high voltage battery pack using small BMS in series?
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    High voltage BMS suggestion

    1S bms that can be strung together for form higher voltage.
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    Yet another erratic SOC readout case of JK BMS :-(

    I have long abandoned SOC as well. Simply put, you cannot count electrons and expect all electrons are accounted for. Just imagine: if your BMS has an accuracy of 99.99% or 0.01% error. In 1 hour time it has accumulated 0.01% error; in 24 hours 0.24% error. How much error do you think it...
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    Does JK BMS log Cell Under Voltage Protection (Cell UVP)?

    There is timer when it reaches Undervoltage? Where is this variable? Attached are my current settings and system logs. I changed my over temperature to 40 yesterday; will bring it down to 39C once I fix the cooling.
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    Does JK BMS log Cell Under Voltage Protection (Cell UVP)?

    oh.. didnot know. i was out of the loop for a few months..
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    Q: MPPT

    Deye has logic built in circuit/logic to limit the power draw out of their MPPT.
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    Does JK BMS log Cell Under Voltage Protection (Cell UVP)?

    This Morning, my Deye shutdown (due to low battery) and I went to investigate the cause. My Deye is configured with Shutdown Voltage of 49.5V or an average cell voltage of 3.010V. My 16s JK is configured UVP of 2.800V and far lower than the 3.01V. However, it is possible one of the cells went...
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    Discharge rate?

    2 x 28kw water heater . . . you will need at x3 solar panel, x5 in battery storage this is a big system ... cost a fortune
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    Seplos goes dark

    Seplos Alibaba store?
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    Overheating panels

    If space stations are not worried at these levels, I should not worry if my panels go half as hot at 60⁰C Of course our panels are half as good than those sent up in space, but still should be good enough for earthlings.
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    JK BMS CAN bus comms now possible for inverters that support Goodwe and Pylontech batteries

    Let me get this straight: From my understanding, I will need an ESPHome device, to connect to JK (via BT?) to get the JK data, then this ESPHome device connects to inverter, translate JK data to Pylontech data. Therefore, I need an ESPHome device...
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    Solar busbars...is it a thing?

    MPPTs are wild animals. they need their very own space. You are not to share PV among MPPTs. However, a SunSynk engineer showed a blocking diode circuit that can be used to parallel MPPTs to a single PV/Turbine source. (source: www.youtube.com/watch?v=nZ6PGN2L10k ) If you have knowledge in...
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    QUCC relay BMS : troubles

    JK also officially said their BMS is not to be used in Parallel (either with another JK or with other BMS).
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    panels in a "v" formation

    Why SE+SW > S panels
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    Jk bms password failure

    There are TWO passwords on a JK BMS namely: 1. Bluetooth (for the mobile app to connect to the device) with default 1234 2. Settings (for user to modify the settings) with default 123456 which one did you change?
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    Isolator breaker resistance

    Growatt inverters are high PV voltage, low Max PV Input Current MPPT designs as shown from Bud's photo above. Dumping 6 parallel strings, 9A each will overload Growatt's MPPT.
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    Isolator breaker resistance

    SOP: You should have individual fuse/breaker per string before combining them. This should isolate bad string from ruining the whole array.
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    Isolator breaker resistance

    if there is this much voltage drop across the breaker, either: 1. Breaker has poor contact (you can use a volt meter, measure the voltage drop across the terminals) (but this would burn/melt the breaker) 2. Or panel (source) drops when load (SCC/Inverter) is connected (you can measure the...
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    How to produce a significant Ground Fault?

    Assume house is supplied Split Phase power (120, Neutral, 120), and Inverter is non-split phase (Deye EU Version). How does Inverters detect Ground Fault? I assume Inverters simply detect current imbalance between L1 and L2? And if that is the case, is it possible to generate a Ground Fault...
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    How to produce a significant Ground Fault?

    How much current to cause a significant Ground Fault ? What is the best way to simulate one (on the PV wires, AC wires, Batteries)? (ie to cause an actual Ground Fault on a Deye Inverter for instance) And what equipment best suited to detect them? I want to train people on how to detect ground...
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    Looking for Deye Manual for latest firmware 0000-C35C

    Latest Deye Firmware update added new stuffs that are not in the manual. Would appreciate if you could share the updated manual. Thanks!
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    Deye Firmware Tracker Thread

    If I am not mistaken this Over voltage U is basically similar to having this: ie: If Grid >249V and <265V for >600s, Deye will Disconnect. Why have to add a separate entry? This middle part of GridSet2 appears similar to the previous version GridSet3 then...
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    Deye Firmware Tracker Thread

    (Not actual screenshot. drew on paper, then reproduced using MS Paint) No idea what the middle part means. And then on the next page (Grid Set3), the top liner: Over voltage U>(10 min. running mean) 0.0V What does that line mean?
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    Deye Firmware Tracker Thread

    Latest Firmware 0000-C35C adds new Grid Settings. I asked local Deye support and they are as in the dark as I am.
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    Ground mount panels and property setback

    Irate envious neighbor? I'd relocate them much farther than the 25' he was asking. You do not want your panels mysteriously broken one day.
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    Daily BMS vs JK BMS

    You can have Deye use Batt V. However LifePo4 voltage changes when charging/discharging/resting making Time Of Use not be reliable. I mean, take a look at this Time Of Use (in voltages) example from Deye manual: First line 01:00-05:00, Deye will stop inverting (supply power) when Battery dips...
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    Using panels on a single mppt port in DEYE inverter

    Deye's MPPT not so secret Secret Sauce: Can be used to reduce current draw from Solar Panels.
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    I Need Help, Will this system work?

    I did not notice the micro-inverter on the panels. my bad! my earlier post = invalid
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    I Need Help, Will this system work?

    36 x 250W panels = 9000W 3 strings of 12 panels= 3000W / string (Voc ~ 480V) Imp per string ~ 8-10A Safety requires that you install Fuse/MCB (~15A per string) + SPD in that Combiner Box. And then another Fuse/MCB (~45A) + SPD near the SCC/Inverter. I was told that this Fuse/MCB can qualify as...
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