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Pumba

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  1. Like
    Pumba reacted to Bobster in Best setup for solar panels   
    I have 6 facing north and 6 facing east. So you could do something like that. That would allow you to have 2 x 3 north facing cluster that might escape the shadows you refer to.

    You will get a different PV delivery curve. I start getting PV quite early in the morning, so peak would not be midday. However the east facing panels do provide useful power until at least 14:00. 
  2. Like
    Pumba reacted to Brani in Best setup for solar panels   
    A lot of guys have east/west facing panels and do get pretty good results. The idea is that you could have one string facing east, catching early morning sun, and the other one facing west for late afternoon. 
    The panels performance drops with the raise in temperature, so that early morning charge with a cool panel can be very effective.
  3. Like
  4. Like
    Pumba reacted to ThatGuy in New energy rules for South Africa will help businesses and households move off Eskom’s grid   
    🤣 This is noted on your bill as "sundries". Don't ask why it's 80% of the cost
    I've never seen or heard of this requirement before... Can you elaborate?
     
    I identify as a strong independent Chinese man-woman, so I guess then I win either way. Thank you for all you've bought from we/me/us, I will buy many sundries with it. 👌
  5. Like
    Pumba reacted to Kalahari Meerkat in New energy rules for South Africa will help businesses and households move off Eskom’s grid   
    Ok, people, my vote is for no registration or licensing required, unless you feed into the grid, if all you are doing is supplementing commercial power with your own, or even run off the grid, it should have no requirements.
    As for being a producer of power... the problem is, that if you need to feed into the grid, the line voltage will rise and this, if everyone in your neighbourhood wants to do this, can end up with 300V on a 220V circuit, which some equipment may not be all that happy with, then a cloud comes over/the wind stops and all the power being produced disappears and the utility is up the creek and the 300V turns into 180V as all the consumers pull instead of push power... it is not as simple as some may try and make it sound, that we are being ripped off by Eskom and the grid tied municipalities goes without saying, but since they have run the infrastructure into bad shape & all, it probably is best to consider doing them the favour of lightening the load and disconnecting from the grid. At least until such time as they get their issues sorted and produce reliable power at a more reasonable rate and don't charge for everything else that is really included in the energy charge, separately, but is a great way of adding more fees and make it sound no too unreasonable.
    Service and Administration Charge
    Network Capacity Charge
    Network Demand Charge
    Anciliiary service charge
    Energy charge
     
    Wait, you forgot to add the drinks and hookers charge...
  6. Like
    Pumba reacted to ThatGuy in New energy rules for South Africa will help businesses and households move off Eskom’s grid   
    Warning, wild conspiracy theory below:
    As soon as there's a registry of consumers with their own power generation capacity, you can bet your bippy that the next thing to follow will be a tax on that generation capacity. They'll say it's to "motivate net consumers to supply into the grid", or to "recover costs associated with increased maintenance overhead". Now, who in their right mind would buy a system that's going to end up costing them more, so eventually there'll be a lot of people acting as a major reserve supply for our country's struggling utility. So they'll complain that there needs to be regulation of this supply to ensure that all facilities are up to standard and to ensure stability of the grid. Then I'd expect at this point it'll be easy for all the cronies to get contracts to perform the mandatory inspections and "maintenance" of your "facility". Queue rampant bribery and corruption music.
    Is this really likely? Probably not, it's just a crazy conspiracy theory on the internet after all. But I'll stick with my batteries thanks, as I don't need Mr. Sithole and his friends tramping dirt all over my new carpets when they come to check the meter! 🤣
  7. Like
    Pumba reacted to Calvin in New energy rules for South Africa will help businesses and households move off Eskom’s grid   
    I have been trying to make sense of this post.  Please help.
    I assume that the 5M you refer to is 5MW (megawatt).
    I assume that 40M is in fact 40m (metres), and 8M is 8m.  I further assume that the 605W you refer to is a 605W panel.  The only one I can find is a Jinko RS600M-120HC - they measure 2172mm x 1303mm.  You could fit a theoretical maximum of 113 into an area 40m x 8m if you packed them without gaps to avoid shading, more like 40% of that in practice.  "Easily 120" would be a stretch - perhaps I have misunderstood you?
    By 7.2 KWhr I assume that you mean 7.2kWh.  I do not understand that - 120 x 605W would be about 72kW.   (Expressing power output in kWh makes no sense unless you attach a time dimension to it.)  Did you mean to say 7.2kW?  If so it should have been 72kW.
    So, (making many assumptions) is this what you were trying to say?
    "I have a space of 40m x 8m where I could fit in 72kW of PV using 120 x 605W panels".  It would not be quite true, but OK.
    Forgive me if I am being too pedantic, but there are many people who read these forums who are not technically educated - the conversation will be more easily understood by all if we so not each invent our own abbreviations.
  8. Like
    Pumba reacted to Brani in New energy rules for South Africa will help businesses and households move off Eskom’s grid   
    I have seen your facts...no need.
    Each to their own, people still buy batteries and for the good reason. 
     
     
  9. Like
    Pumba reacted to Brani in New energy rules for South Africa will help businesses and households move off Eskom’s grid   
    From COCT regulations:
    4. SSEG systems not permitted
    Net generators are not permitted. SSEGs can either be “net consumers” or “net generators”: “Net consumers” on average (over rolling 12-month periods) purchase more electricity from the utility than they feed back onto the utility grid. “Net generators” on average (over rolling 12- month periods) purchase less electricity from the utility than they feed back onto the utility grid.
    SSEGs which are net generators are not permitted by the City, and these Requirements therefore applyonlytonetconsumers.
    As mentioned in the introduction, the City does not believe it has a legal mandate to purchase electricity, on average taken over any consecutive 12-month period, in excess of what it sells to the customer in question.
    2 www.capetown.gov.za/elecserviceforms 14 | P a g e
           
    Transfer of power to a different location is not permitted:
    The power produced by the SSEG must be utilised on the property on which the generator is located, or fed onto the utility network for purchase by the City. The following are not permissible:
    1. Installation on a different property to where the power is used (e.g. installing solar PV panels on a neighbour’s house's roof)
    2. Supplying power from an SSEG on your premises to another premises (e.g. selling power to neighbours or to another premises elsewhere in the city). This is also known as wheeling.
     
    https://resource.capetown.gov.za/documentcentre/Documents/Procedures%2C guidelines and regulations/Requiremenst for Samll-Scale Embedded Generation.pdf

    You started your generation in October/November last year. Unless they don’t notice it, you are a net generator.
     
  10. Like
    Pumba reacted to YellowTapemeasure in Advice on new System   
    You've already stated that you want to oversize for bad solar days, so I'd recommend that you try and get the latest 8K Sunsynk with 22A MPPT to allow sufficient latitude with a wide range of panels / configs. The amps doesn't matter too much because it will be clipped by the MPPT, but voltage is critical, Sunsynk recommend not exceeding 450V per MPPT.
    Alternatively you can wait for the newer 10 and 12K Sunsynks, specs and details may be available this week still.
  11. Like
    Pumba reacted to Achmat in Advice on new System   
    Every installer I've found know very little about the capabilities of the sunsynk. I decided to find a sparky and told him how I wanted the unit installed and basically project managed him during the install. It's a hybrid so it will blend from the grid even if you go over the 8kw of the inverter. I have witnessed this first hand with screenshots in another thread. 
    It still produces pv on cloudy it rainy days but very little. The lowest I think was the about 12kwh. 
    Current month daily PV generation for Somerset West, Cape Town. 

  12. Like
    Pumba reacted to Achmat in Advice on new System   
    2. It can pull continuously as long as you need it to. No time limit. 
    3. Yes in adding 6 more of the same panels. 
    4. So the sunsynk has two out puts. The first one is ups load output. This is your essential loads. The second output is the aux and can be configured to run loads when there are excess solar available. You can also configure it to run from batteries so you can still power these loads during load shedding if you want. 
    The grid input is also and output and your non essential loads could be before the inverter. The inverter can then send power back through the grid connection to these loads. When there is load shedding however, these loads before the inverter will never receive power from the inverter or batteries. 
    Current total PV generation since the system went live. 

  13. Like
    Pumba reacted to Jabu in How is the inverter output connected to an existing house circuit   
    Hi. I came across this in this group. One gentleman posted this diagram it has helped me a lot. I hope it will help you too in your question 

  14. Like
    Pumba reacted to Tariq in Advice on wiring Sunsynk 5kW   
    You need to have rcd’s on both your essential and non essential circuits, don’t need one on the input of the inverter.
  15. Like
    Pumba reacted to Tariq in Advice on wiring Sunsynk 5kW   
    @Gerrieis right, the inverter input is connected directly to the incoming main grid supply through the 35 amp double pole mcb, then both my essential and non essential circuits have individual rcd’’s .
    yeah, not too sure on the mcb on the spd ground wire, I just have the spd on the input side of the inverter
  16. Like
    Pumba reacted to Tariq in Advice on wiring Sunsynk 5kW   
    Based on how I did my Sunsynk:-
    1) You don’t need the first Changeover switch, as the grid connection is a T off the main grid wires going to the non-essential circuits and you have a double pole mcb to isolate the inverter, you do need the second changeover switch, to power the essential circuits, in case of a problem with the inverter 
    2) Don’t believe you need the 25 amp mcb’s before the spd’s 
    3) As the Sunsynk is capable of 35 amp pass through, better to use 35 amp mcb’ and 6 mm2 wire
    4) Please correct me if I am wrong, don’t think you need spd’s on the load side.
     
  17. Like
    Pumba reacted to PurePower in Pylontech US2000 Plus Teardown   
    In December 2020, I unfortunately fell victim to a lightning surge from the grid. Various items in my house was impacted. Thankfully my Axpert inverters(x2) survived with no issues, although the Raspberry Pi that runs ICC was effected, Pi booted but USB and network ports dead. My Pylontech bank(5 x US2000 Plus) was impacted as well. The communication ports(console, RS485, CAN etc) was impacted on all 5 Pylontech modules. Fortunately they were still charging and discharging normally but i could not get any info from them. I sent them back to the supplier to get a full report. The report stated that the CMU boards in all 5 modules had to be replaced and Pylontech warranty does not cover surges, so I had to claim from insurance. Got all approvals and all boards were replaced. I commissioned the entire bank after the repairs was done. After a few days I was noticing that 2 modules cell voltages was going over 3.65v during charge and these units were throwing High Voltage and Over voltage errors in the logs. When this happens, it stopped accepting any current and waits for those effected cells voltages to drop below 3.5v before accepting a charge again. This happened over a few days and the SOH counts were increasing for these 2 modules. I decided to pull them out of the bank and to my surprise they were swollen! I was actually was shocked(no pun) when I saw this. I returned those 2 modules back to the supplier and there new report concluded that the cells are damaged from the surge and irrepairable. Their recommendation was to replace those 2 modules, which i did with a US3000C and a US2000. 
    I collected the damaged modules and in the spirit of science, being inquisitive and sharing knowledge I decided to salvage some parts before disposing the cells. I took the following pics:
    Bottom cover off, we can see 3 x 16v battery packs(notice them being swollen), connected in series. Power Management Unit(PMU) board on the bottom left and Communication Management Unit(CMU) on the bottom right. 

     
    PMU Top: 

     
    PMU Bottom, notice all the MOSFETS here.... this side of the board is attached to a heatsink situated on the front right top side of an installed module: 



     
    CMU Top:


     
    CMU Bottom:


     
    LED Strip:

     
    Internal power cable size 8AWG - 10mm2:


     
    Battery Packs:





     
    If you counted, there are 10 pouches per pack. A total of 30 pouches in a single US2000 Plus module, equates to 1.6v per pouch. BatteryView software shows 15 cells, so i am guessing that 2 pouches make up a cell of 3.2v.
    Enjoy the pics. 
  18. Like
    Pumba reacted to Achmat in Essential loads not stable sunsynk SUN-5K-SG01LP1-EU inverter   
    The rated ups output of the inverter is only 5kw and not 5.5kW. I've had this discussion some where else before. 
    Can you share some settings as it should charge at full current if the grid charge is enabled and time of use is active even with a some loads connected. 
  19. Like
    Pumba reacted to Achmat in Essential loads not stable sunsynk SUN-5K-SG01LP1-EU inverter   
    You have undersized your setup for your needs and now blaming the equipment. 
    Maybe share some of your settings. I can charge my batteries at full current from the grid AND run the connected loads at the same time if I wanted to. My grid charge option is however unchecked. 
  20. Like
    Pumba got a reaction from YellowTapemeasure in Cables and Isolator switches incredibly hot   
    R12000 to rectify the first installers poor workmanship - wow. You are lucky the house didn't burn down. In this solar game there seem to be many chancers out there.
    As they say "Consumer beware!"
  21. Like
    Pumba got a reaction from YellowTapemeasure in Essential loads not stable sunsynk SUN-5K-SG01LP1-EU inverter   
    On my 5kW Sunsynk one doesn't even notice when switching during load shedding. Using 4.8kW on the UPS side is probably pushing the limit for a 5kW inverter
  22. Like
    Pumba got a reaction from YellowTapemeasure in Deye/Sunsynk 5kW MPPT Limited to 9.9A?   
    My 5kW Sunsynk will only get to a max of 9.9A on each MPPT, one string running at about 280V and the other at about 350Vs - by the way, what program are you using to get all those voltage, amperage graphs.
  23. Like
    Pumba reacted to YellowTapemeasure in Deye/Sunsynk 5kW MPPT Limited to 9.9A?   
    Please forgive my previous very brief response, I work during the day, it pays for my toys.
    You make a good theoretical argument, but everything is not always theory, otherwise we'd all believe that the earth was flat, evolution and so on. I am not an electrician, but I like to tinker and learn about things. I'd also rather not have this thread (which is about something completely unrelated) devolve into a hot debate / religion on the contentious topic of earthing.
    What I do know is that SANS standards require it in SA, which means that a (proper) CoC will require it:
    I can use @recre8 argument for lightning, but in my experience that is a huge topic, also pretty much a religion on its own. He also mentioned static build-up, which I  believe has strong merit, but very similar to lightning. Let's leave that parked for a moment, partly because I know far too little about it 🙂 and partly because we have some (undisputed?) facts. 
    I understand SANS' logic for wanting it, because panels are surrounded by metal frames. The panels also have wires carrying high voltages in the nearby vicinity, and it's outdoors, subject to the elements (wind, rain, sun). These high voltage conductors are insulated by a protective plastic sheath that is hopefully suitable for panels (like Helukabel solar products), but who knows? And if they are, are they always neatly tied up? Could wind perhaps move them and cause them chafe away their insulation, and could the conductors, over the course of their 25 years' lifetime, perhaps touch the metal frames / support structures? How much time do homeowners spend up their, and when there, do they make a meticulous inspection of every centimeter of cable? I am sure that you will agree that the DC voltages concerned are pretty lethal.
    You have made your point, and I have made mine. If you feel that we need further discussion on it, let's start a new topic or necro an old one? I also don't know much, but keen to learn.
  24. Like
    Pumba reacted to Vassen in Sunsynk 8kW   
    My understanding is that the aux output is not meant for normal non essential loads. Its meant to be able to dump excess solar power to geysers, pool pumps, etc. I don't understand the logic of using the aux output for non-essential loads. Its a hybrid inverter with zero export capabilities, so you are able to backfeed to the grid input connection and zero export with the CT coil on your main eskom line. 
    However, i see a lot of people requesting this so maybe sunsynk will enable the functionality with a firmware update. 
  25. Like
    Pumba reacted to HannesZ in SOC at 78c, sunsynk 5.5KW inverter and 4x Pylontech US3000c   
    Well after doing the balancing I found the real problem, one of the link cable where not fully connected to the battery. Once connected the other two started to change. 
     
    Thanks to everyone helping. 
     
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