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Thank you for the great forum, Safe Driving over the weekend. Sincerely Jason

LionKing

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  1. Thanks
    LionKing reacted to plonkster in Running Laser Printer on Infini Plus 10KW?   
    Well, here is a stackoverflow post that addresses that. The trouble is the inrush current for heating the fuser unit. This seems to be in the range of a second or less, and since most inverters can do 200% Pnominal for at least a second, I'd expect even a 3KVA unit to do just fine (but it would be on the edge). With a 10kva unit you really should be fine (Except, I think it's 3kva per phase... so maybe not).
  2. Thanks
    LionKing reacted to Coulomb in Do Axperts support Grid-tie/Sharing?   
    Another diagram to incorporate all (most?) of the Axpert models:

    The King would not close both switches at once, since it doesn't do AC blending at all. It would only close the upper switch (opening the lower one first?) when in Bypass/ECO mode. In battery or line modes only the lower switch would be closed (note that the King's line mode is different to the others' line mode).

    It's possible that the King also has a dedicated DC-AC converter that converts AC-in directly to battery voltage, since that's what the LCD diagrams imply.
    Once more: this is all speculation on my part.
  3. Thanks
    LionKing reacted to Coulomb in Do Axperts support Grid-tie/Sharing?   
    I'm not so sure now.
    I argued here that Axpert MKS II (PIP-5048MG) can blend AC-in and solar power. The LCD diagram seems to indicate that the blending happens at the AC level, not DC, although the diagram on a small LC Display might not have room to be technically accurate.
    This is from a PIP-GK (Axpert VM III) manual:

    In 2 of the three sub-modes of line mode, there are two arrows pointing to the load. That seems like AC blending to me. That seems to suggest to me that all the PIP/Axpert models with the ~450 V SCCs are capable of feeding the grid, despite claiming off-grid status and not having official anti-islanding firmware that is certified by testing laboratories. Of course, I could be misreading the manuals.
    I agree with your comments, @Youda, that the only way to prevent accidental push of power into the grid is with an AC-DC-AC conversion setup, as in the PIP-5048MK / Axpert King.
    [ Edit: "Axpert VM II" -> "Axpert MKS II" ]
  4. Like
    LionKing reacted to Coulomb in Do Axperts support Grid-tie/Sharing?   
    In fact, I believe that this is how the PIP-5048MG / Axpert MKS IIs and PIP-5048GKs operate:

     
    When PV and AC-in blending is happening, the two switches would be closed (the inverter having synchronised with AC-in first, obviously), and the two right hand converters are bi-directional and could operate in either direction, depending on the instantaneous power values of the available PV and load.
    The PIP/Axpert models with the 145 V SCCs have a buck DC-DC connecting to the battery, instead of a boost DC-DC connecting to the ~400 V DC bus. I suppose it would be possible for these to blend PV and AC-in power, but then PV power would be going through thee converters to get to the load. Well, really four converters, since the battery DC-DC is atually two converters with a high frequency transformer between them. So that would be somewhat inefficient.
    Once again, all this is speculation on my part, based on the LCD diagrams in the manuals, and one customer report (a few posts above).
  5. Sad
    LionKing reacted to Youda in Confused by Voltronic SNMP web pro stats   
    Hi @LionKing
    Voltronic inverters are great, but the SNMP card is just a piece of crap:
    Just like you said, the daily stats are okay, but monthly and yearly are total bullshit. Every couple of days, SNMP card just freezes. It is not clearly visible, but if you try to change any setting, it will throw an error. ON/OFF is the only help. I have two InfiniSolar 5K Plus units and both SNMP cards are behaving exactly the same. Insane statistics, freezing every other week.
    For example, one of my units is telling me that it produced 62 MWh last year. This would translate to roughly 170kWh/day,  including winter. Cool! 😋

    Forget about using this tool. It really has no value. If you want to have accurate stats, the only way is the realtime logging of the values from the Infini and then sending them into some 3rd party tool for keeping kWh stats. I'm using EmonCMS, for example. But I'm sure there are tons of alternatives.
    Sorry,
    Youda
  6. Haha
    LionKing got a reaction from Youda in Confused by Voltronic SNMP web pro stats   
    We have a Voltronic Inifni 10KW inverter with SNMP web card. The (currently) 5KW solar system was installed on June 10th, 2018 so its almost a year now and I wanted to get an idea of how much energy has been produced. 
    I'm confused by the "Power Statistic" page e.g:
    - Annual chart shows all the power generated (10,000 KWH) as if it were in 2019 - which is impossible.
    - Monthly chart, shows all power generation to be in only 3 months - again not possible.
    - Daily chart seems accurate.
    Why are the annual/monthly charts Not accurate? Is the inverter not logging data correctly or is this a setting issue?  
    What about "This year" value in the table below chart, is that supposed to be for calendar year or 12 months since installation? because if its the former, then the value is incorrect, even for the 12 month option its a bit optimistic. 


  7. Like
    LionKing reacted to Jaco de Jongh in Difference between various grounding toplogies?   
    Yes that is correct. 
  8. Thanks
    LionKing got a reaction from Jaco de Jongh in Difference between various grounding toplogies?   
    As per NEC, there are three options to ground the DC side, earlier it seemed that the Option 1 (separate electrode for DC side) was the only way to go later NEC clarified the statements and now we have three ways - two of which involve common electrode for DC and AC.
    I'm in Pakistan and the govt here probably decided to just copied NEC's initial rules, so the only acceptable way to legally do DC grounding here is by having a separate electrode. Getting a new grounding electrode is quite expensive and we already have one electrode installed, I was wondering if there is any downside to to option 2? If the inspector shows up, he will still see two grounding wires coming out of the ground (although they are bonded together). Any suggestions? Btw, the required resistance is <= 5 ohms for each GEC.
     
    Another question: I'm using Voltronic Infini Solar 10KW plus inverter. It has a equipment grounding screw on the body, that connects with AC grounding side, right?



  9. Like
    LionKing reacted to Sidewinder in Infinisolar V 5kW Parallel Installation   
    Over Easter weekend, I proceeded to re-do the wiring back to what I had on a single V. This was due to the fact that for some reason, even with 2 string of  3 x 300W panels, it would not generate more that 1000W (per string) @ midday with 57.7V on the array. Now we all know the Infini V, just like the Axpert, likes about 65V to "wake up" in the morning.
    So I went from 4 x 1800W string on 4 x MPPT controllers to 2 x 3600W strings on 2 x MPPT controllers. My second V is still in play, but with no PV, thus it is only giving me the ability to push a continuous 10kW. Immediately, the voltages went up to around 90-100V and my PV production is back to 6200W, with peaks of 7000W. 
    So from my point of view, it seems the Infini V does like to run near the PV limits, as spreading the load of 2 MPPt's over 4 of them will not yield better results!
  10. Like
    LionKing reacted to Sidewinder in Infinisolar V 5kW Parallel Installation   
    Hi Inifini fans,
    As I could not find a similar thread about this subject, and not wanting to hijack @DeepBass9 's one, I thought to start my own.
    Firstly some history:
    I went off grid on 16th Dec 2016 with a 5 kVA Axpert with 3600W of PV and 8 x Trojan 105-RE's. Added the usual goodies that most have, nl. ICC on Pi3, BMV-702 and HA-02, as insurance.
    The system worked well enough, but the constant shutdown's due to over utilising appliances, e.g. kettle & microwave together with geyser was getting beyond me.
    As short term I "downgraded" the geyser from 3 kW to 2kW, and this helped somewhat, but seeing that I already had an additional geyser in the roof that needed to be connected into the warm water system, I knew HKGK....
    So when I started looking at expanding the system, I decided that I would need to acquire a hybrid type inverter, and I wanted to re-use what I have, e.g. ICC.
    So I pulled the trigger and 7 months later replaced the Axpert with a InfiniSolar V 5 kW.  I installed it adjacent to the Axpert, with the idea that if the Infini gives me any permanent headaches, I can switch back to the Axpert in less than a minute. The long term goal was to be able to install a second Infini in it's place, for a parallel setup.
    So after the Infini was installed, and with lots of help from Manie, got the ICC data sorted out to report what it is supposed to. Some values were missing from the dual MPPT's, mainly due to misalignment of the "string" of characters that the ICC was reading. Sorted out chop-chop.
    I liked: Seamless switching between Eskom, Solar and Batteries, just like a hybrid is supposed to. Also the extra 1kW and no more beeps. Pushing short 7 kW loads no problem
    I don't like: Lost the ability to manually or automatically control between Solar/Battery and Grid. Can't pull 7 kW for long periods, with a planned load of >5kW, a upgrade needed to be part of the plan. Also the 3kW PV limitation was regularly breached, so much so that it seemed to me that the inverter was "chopping" my PV production off @ +-6200W, from a possible 7200W.
    So the new 2nd Inverter arrived a couple of weeks ago.
    Fortunately,  I noticed beforehand that the original V did not come with the parallel board. Weird enough, the Axpert came with it, so it was duly transplanted. 
    The lowest cost parallel card I could find, and available over the counter was @ Communica, as long as you remember your passcode!! 
    Ripped out the Axpert and proceeded with Infini fitment.
    The mounting holes don't match, so new one's had to be drilled. The cabling layout on the left for in- and output power is the same, and the PV cables have to be doubled up. It was quite a job splitting my 2 strings into 4 strings. Space is a bit tight.
    The biggest issue is with the Battery cables, as the connection point on the Infini is away from the wall, meaning you need slightly (+-10cm) longer cables. I had enough slack on the black cable, due to the fact that the - terminal on the battery is closer to the wall. (They both need to be the same length - read that on this forum) So will need to install longer cable when tidying up next.
    Next switched on the inverter, and checked that all three software versions are the same as 1st inverter. As I has bought mine just over 6 month's apart, I has no issues there.
    Next made space for the two sets of parallel cables to fit the inverters, as all my cables feeding the inverters are hidden in trunking. What a mission to get the holes enlarged, specially with trunking already in place.
    Last step was to inform family on impending switch off for 30 min to activate the inverters in parallel mode...well, you may as well budget 1h30 for this step.
    I was unsuccessful in finding a parallel manual specifically for the infini V series, so followed the normal Axpert one, as they are birds of a feather.
    Firstly, configure the new inverter with the same settings for battery values etc, as the original one. You will notice that setting 28 does not give you the option to go to PAR from SIG, yet the manual tell you to change this. You need to switch the inverter to standby with the on/off switch on the bottom right of the inverter, and then the option becomes available.
    Switch off the both inverters - by disconnecting the battery- and then on again, as well as the rhs switch. The one will boot as with MS (master) on the display (middle top centre), and the other SL (slave). Note, allocation of MS and SL is random.
    So next, one needs to provide Grid power simultaneously.  As I has installed a Isolator to each inverter on the input, as well as the outputs, I had to flick both at the same time. After a few seconds, both the inverters shut themselves down. Redo the procedure....same result. 
    After many minutes of head scratching etc..I discovered that both inverters had gone back to SIG mode again, so applied the change again, and second time they started without any errors present. Then flicked both the output Isolators and parallel system installation was complete.
    So all that is outstanding is tidying up the cables and putting the trunking covers back.
    Post Implementation Comments:
    Later that day, I had a chance to look at ICC before the sun goes down completely. I changed the inverter type from Infini V Single to Parallel and increase the inverter count to 2.  All the basics looked OK, but many values were 0, yet PV1 & PV2 on both were reporting values on the Inverters themselves. The Inverter temp. was also missing. Even though the Cluster Info screen showed data from both inverters, the Thread info page only shows one data stream. Only the next day was I able to look at the data more carefully.
    I have noticed the following:
    The PV Watts reported (I assume summed by ICC of the 4 x MPPT's) does vary tremendously. Previous graphs of PV production where reasonably smooth, whereas the new installation is very ragged. See below.
    Light Brown = 6 weeks ago, Light blue = today. And today was sunny in the morning, with passing clouds in the afternoon.

    So for now, it looks like I've gone a step backwards, and I almost want to think that is seems the two are fighting each other!! Any comments/suggestions are most welcome. The system seems to work out to about 4000W, with a spike to 5900W for a very brief period of time.
    I've not had the chance to load more than 6 kW today. Will do that this weekend.
    Another difference I've noticed tonight that the PV voltages differ completely now that from previous. See below a snapshot of 3 days ago (SIG) and the last 2 days on PAR. Green = SIG, Brown = yesterday, Blue = Today

    Now it mostly runs @ below 60V, which is below the Inifini's startup voltage of 60V, whereas previously it was running at just below 100V.  I see that even after dark, ICC is reporting PV volts of 53V. Yet PV is being generated, as per 1st graph. Gentlemen....(and ladies)...start your answers.
    Mine is that when ICC chops up the inverter string, it is out by a few digits/symbols, thus reading and reporting the wrong values. Hopefully, this is something that Manie can fix. How he got so far without ever laying his hand on a V series is amazing. Manuals etc can give you only so much data, but the proof is in testing ICC with the real deal.
    I see on PVO quite a few parallel installations, not sure if they are active here, but I would like to hear comments/suggestions etc from other parallel Infinisolar V users.
  11. Like
    LionKing reacted to pilotfish in Infini Plus 3Ph 10KW Neutral wire bond/Join with Grid Neutral?   
    That sounds about right to me, don't change anything.
  12. Like
    LionKing reacted to pilotfish in Infini Plus 3Ph 10KW Neutral wire bond/Join with Grid Neutral?   
    As an electrical contractor I would have no problem with bonding [neutral in/neutral out] at the inverter from a safety perspective. This will ensure that that your neutral is always bonded to earth potential as it should be and as it is by grid provider.
    Some municipalities may have some B/S requirement about isolating the alternative energy source from the grid, but this actually compromises safety in my opinion and there is absolutely no good reason for this that I can think of.

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