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Saint

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  1. hi guys, Helping a friend with his solar installation,i am by no means a proffesional, i have a technical background, but not really electrical, but is immensely interested in soalr and its applications.... so please be gentle on me.... i have done a few installations for friends, family, and obviously my own installation, but these was all done using the goodwe inverters. They seems a little easier than the sunsyncin terms of basic wiring and setup, athouhg it seems the sunsync is more flexible, so i am excited, but also want to be sure everyone i helped everything is done properly. i am now installing for a friend, i was hoping someone can help me confirm if i am on the right track... the more knowledgable guys like @Leshen or @Achmat etc.... the main difference between the goodwe and sunsync is the sunsync not bonding the earth and neutral internally like the goodwe does when grid falls away.... my questions pertains to the earthing.... i installed two arrays at my friends place, i grounded or earthed each array with a 10mm square gp wire connected to a earthspike connected to the panels. Question, is this correct, according to me it is, what about the sunsync inverter, do i ground this back to the earth in the main db, or also to a earth spike... to me it seems like the manual wants it to be earthed back to db... is this correct... i will be installing a earth nuetral bridge as well, my concern is whether the rest of my earthing is done correctly.... please comment anyone who is sure about this bit... thanx gents....
  2. i find this discussion VERY interesting, although some guys seem to get to hot under the collar, i think we are all in the same boat as per Bobster, and ultimately have the same frustrations... just a few things to consider.... the problem is exactly in that.... most guys do not use electricity only during the day.... almost ALL the heavy users with very little exception use electricity around the clock, and not just during the day.... we have a factory of about 500 people and have a day and night shift... and most times our autoclaves run during night shift, meaning we have peak during night time.... think of example the mining industry, most mines run operations 24 hours around the clock in shifts, if not that, the very least the processing plants and most services are still running 24/7 even if the operation is not at 100% production.... cooling and ventilation on a mine works on a completely different method than household ac... they have fire suppression and lifeline systems that never should go offline as is the same with ventilation and cooling, same with critical services that need to be supplied to aux or refuge bays underground.... think of industries like refineries like the likes of sasol etc, also around the clock operations.... any type of high temp furnaces, the guys in the galvanizing industry etc, the gold processing plant at DRD.... my wife is a electrical engineer at eskom/siemens, and i have but a very limited insight into their dealings and challenges, problem is mainly the corruption, which is core to all issues were the state has their dirty paws in the broth.... the poor guys on the ground just takes the grunt for it.... if you take the top 15 industrial customers of eskom you probably have a ridiculous figure like 70% of their consumption (can't remember the exact figures but is something crazy like that), so saying that guys using less on their fridges and lights during nights helps and that the duck curve is not an issue is not really applicable, yes eskom asks for guys to switch of swimming pool pumps and geysers etc etc during load, but that is because they are already so close to the cliff, and every bit helps because they are already so deep down the rabbit's hole.... and most days no longer have any spare capacity to ramp up.....
  3. well then it is still retarded, both fukushima and chernobyl was due to GROSS human negligence or error, and neither of them the actual fallout was nearly as bad as what the press or stories makes it out to be, yes nucluar fallout is not what you want.... i am not ignorant to that... just making the point that people who little to nothing of nuclear speak about it like they are experts on the subject which is quite annoying.... evedently the nucluar waste generated by the pebble bed reactors would have been so little that all waste generated during its operational time could have been stored on site of the actual reactor..... if you have been to a actual coal powerstation you will know it is not nearly the same comparing the waste generated by a coal station just considering the ashdams needed to deal with the burnt cola ash then not even touching the actual coal mines and overburden and other enviromental issues this causes.... etc etc
  4. great point or idea bobster, having worked on the old Pukke or north west PBMR project on their micro model simulation project while finishing my studies, i can vouch that nuclear is by far the cleanest and safest form of energy generation (or atleast was when we did the research now more than ten years ago... i doubt it has changed much), but most of the tree huggers have NO sense or idea of how these plants actually work, and the technology behind it... actually neither how the normal coal or gas fired plants work either, so why comment on something you have no idea on... i think if memory serves, the report i saw last year (wife is senior electrical engineer involved with the eskom woes, so all reports and data is courtesy of her work etc etc), nuclear was still the safest way to generate power per megawat generated with either hydro or wind being the the most dangerous (think about it,it normally goes wrong during installation, less casualties during the actual plant builds since it is not such a harse environment when compared to a hydro or wind turbine installation where guys are working at heights etc with lots of risks.... just google the wind farm installations to see how the big blades gets installed and how easily it goes pear shaped... and the safety or casualty rate is determined per megawatt generated over the rated or planned life of the system vs the casualties incurred during operation and installation!) Even solar is not that great when considering the entire carbon footprint since the manufacturing process behind these is not great, albeit improving all the time atleast... i hate these so called people who is environmentally conscious but actually have not idea what it is actually about..... and just sprout their own ignorance and crap as far and loud as they possibly can..... they normally cloud the judgement of people still forming their own opinions.....
  5. Does your system trip while eskom is present....? Almost sounds that way when you describe it... it is def not supposed to do that.... i have the same inverter.... did not split my backup and essential loads... not in the traditional sense, i have the entire db loaded on the main supply side of the inverter, and the backup as well, switching with a manual changeover, i have never had the inverter reset or trip when used on the back up side if the grid is off, you can on the one had easily do it, but also if doing things responsibly it can actually be quite hard ( i am in similar setup to yours, having gas stove etc, solar geyser, with those few removed it becomes hard to max out the inverter's 4.6kw backup side....) If grid is present it is supposed to supplement what the pv or battery cannot provide at any given stage, no matter what the load is, it will just add from the grid, or that is how i understood it always... might be something else wrong with your setup... and also to bobsters point, if the actual inverter trips, then it should only be about 2 mins, since the inverter basically reboots before power is back on, if a trip then happens in short succession then is is a longer period, i think like 15 mins or something before power is restored since the inverter has an internal mechanism to protect itself from overheating when overloaded.... the little i can add.....
  6. i am pretty sure if you build a proper support structure to install the panels onto, and just pop rivet the panels frames to each other with some sillicone inbetween you will have zero leaks. sillicone makes for a pretty strong bond and waterproof bond, and will take on the exact profile obviously. I would just look at perhaps getting a better type that is maybe UV stabilized. Also maybe during the design put some spacing here and there between strings, should you need to clean, or do some sort of maintenance... although you should be able to get access from below....
  7. yeah man, i hear you, product is ultimately only as good as its support... think this is were sunsybc is going to hurt the goodwe brand.... just on a side note.... you did follow the thread about the nuetral and how it should be connected on the goodwe, was a issue, on my installation, before the chinese guy rocked up....
  8. @gbyleveldt sorry to hear about your issues, i bought four goodwe inverters, two em, and two es models, the two es worked perfect from the word get go, so did the one em, the other one was a disaster from the start. I did all 4 installations myself, not rocket science to be honest, although as soon as i had issues with the one it was a issue that i did the install myself, eventhough i am way better qualified than most installers probably with all due respect.... anyway, long story short, struggled for weeks with segen, it was a nightmare, their service is [email protected], excuse the french, no other way to put it though, i only made headway once i contacted china directly, they gave me a local contact for a chinese man who assisted me who had the problem sorted in one morning, after struggling for weeks with segen solar... blaming and faulting everything possible except the actual issue... i still have the gentlemans details should you ever need proper support..... hope you issues are now sorted, having unfortunately bought a 5kw axpert unit as well, i can say the difference between the brands is night and day.... if the goodwe works i find it to be a great inverter, when compared to the likes of the axpert, i have an offgrid installation with sunnyboys and even prefer the goodwe over them in terms of ease of installation and function etc etc.... seems like the sunsync is also a great offering at the moment though.... just wondering how their build quality compares to the goodwe... the goodwe really seems like solid equipment.....
  9. Hi Paul, THa is very interesting, i am also using a goodwe, also the 5048es at my home installation, and have a axpert or votronic at my office.... imo the goodwe was light years ahead of the voltronic.... but i was recently wondering how the sunsync would compare since the similar pricing and the units on paper does look impressive.... that is good news to have another option.... @gbyleveldt i have been using my goodwe with 5 x 4.8kw lithuiom batteries not supported by the inverter firmware for almost two years no with no problems... without the bms functionality or control from the inverter.... the batteries all have built in bms... and the goodwe is pretty good in terms of how you can manually manipulate the settings for a lithuim battery if it is an unspported one... s so not sure if i am missing something, but surely if you set the correct voltages for charge, float, discharge etc then all should be well, and if not then the batteries own bms should intervene should something go pear shaped.... to be honest the only issue is probably that the soc is not reported that accurately possibly since it is not estimated by the inverter based on voltages... however doing the calcs manually when looking at what the inverter estimates and if i look at what battery usage was i reckon it is accurate within 5% which is probably good enough.... so @Johan Gericke i am sure Bains battery should work fine, you will just need to manually configure the settings.....
  10. hi man, i made myself custom mounting frames from angle iron, due to shortage of material at the time of installation, but also because i wasn't crazy about the existing designs. I stay in the vaal, vanderbijlpark, and we get ridicilious winds here from time to time, twice a summer there is storm like wind pulling out trees... so i was weary of panels blowing off. I have a tile roof, at 12 degrees i made a simple flat iron adjustable connecttion at the back, so you just remove two screws and adjust it to a second or different setting and insert the screw again... and boom diffferent angle for the summer or winter, two screws and you adjust three panels at once... will post some pics....
  11. hi, I was pumping about 2.7kw into my batteries, rest went into my house load.... snapshots i took wasn't the best ever,i have to admit i was a little excited when i saw it, was for around 25 mins at around 7kw... will check my VOC, i have the canadian solar panels.... however my dc voltages are close to the maximum upper limits... but system is pumping like a beast though so seem to be happy... did 40kw last week sometime, adjusted my panel angles a few weeks ago, so reckon i will be able to get another one or two kw extra in december during a clear day..... rest of the days production was not the best ever since there was a lot of cloud cover... probably what aided the high yield, was the overcast and lower tempratures... still nice though.... attached pic for enjoyment....
  12. i have to agree with @fixamess, the goodwe is really a carefree inverter for the novice user, making for an easy installation.... and it is very efficient and can handle quite some nasty loads without problems.... you can oversize quite a bit... i have 22 x 330watt panels installed, totalling a theoretical value of 7260watt... and i constantly get around 5900-6200watt during peak producition which goes or equates to between 80-85% efficiency... during the week i actually had the inverter hit over 7000watt producing stable for over 20mins... this week has had lots of cloud cover so i am sure the panels was quite cool due to cloud cover and low production with the sun breaking through causing this anomoly... however is still pretty impressive.... since my best numbers is normally in december only......
  13. Hi Plonkster, I am still a little confused, so will the inverter work better at 500 v oc rather than at 550v? I have 22 candian solar 330watt panels currently setup in two strings of 11 panels each, giving a theoretical value of 501.6v (v oc is 45..6 @ STC, or 41.9 @ NOCT), i have another two panels already mounted, as well as cables in place and everything, but i never connected them because i thought it might cause problems, since my losses was less than what i expected from theoretical values.... so if i understood correctly, my v oc on the panels will be 547.2v oc if i add the extra panel to each string, but it will or should settle around 465 v oc as soon as it heats up, so will it not be better to add the additional panel then, or will this cause the inverter start generating later because it first needs to heat up so that the voltage van drop...? So will it be better for production to connect these then, or to leave it as is (11 panels per string, v oc at theoretical 501.6v , if i connect one to each string it will push my V on each mppt to VERY close to 550 volt early in the mornings i guess before panels started to heat up.... sorry, just want to be sure i understand what you meant... @plonkster
  14. hi guys, Not to derail the original thread or question, but it actually made me think of something i saw the other day, but perhaps @FixAMess or @Fuenkli or @Jaco de Jongh or @plonkster or @Chris Hobsoncan just clarify something, obviously you need to pair the strings according to max rated wattage etc, as well as the max amps rated for the inverter, when considering the volts though, in the goodwe manual it says the mppt voltage range is from 125-550 volt, then it also says that startup voltage is 150v, and then finally it mentions that the MPPT voltage range for full load is 215-500. SO this is a little confusing to me, does this mean you can size your array to run all the way up to 550volt max, or does it need to stay smaller than 500volt....? I attached a screenshot of the page of the manual i am referring to for all the smarter people out there.... thanx
  15. so out of interest, i reinstalled and changed all the piping to the sans alternative installation over the weekend... works 100% without changing any of the hardware... still not sure why the supplier would give an installation option that does not work... happy it is sorted however... thanx to everyone who exchanged ideas and took the time to comment and help problem solve.... thanx guys.... had a few hot solar showers this week... works perfect now....
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